An outer tube moving mechanism and a valve delivery device

Abstract

The present invention discloses an outer tube moving mechanism and a valve delivery device, the outer tube moving mechanism comprising: a threaded tube, a sliding hole is provided on the threaded tube, a baffle is provided on the inner wall of the threaded tube; a rotating mechanism is arranged on the outer wall of the threaded tube, and the rotating mechanism can engage with the screw thread on the threaded tube; a fixing piece is arranged in the threaded tube, and the rotating mechanism rotates or slides to drive the fixing piece to slide along the sliding hole; and a sealing pin, the sealing pin is arranged in the fixing piece; a push piece is provided at one end of the sealing pin, and when the pushing piece is driven by the rotating mechanism to be pushed to the baffle, the pushing piece knocks the screw on the surface of the baffle. The present invention drives the outer tube to move by rotating the threaded engagement mechanism. When the pushing piece bends to pass through the screw thread on the baffle, the pushing piece will hit the side wall of the next screw thread and make a crisp sound, so that the doctor can be prompted to what position the outer tube has moved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an outer tube moving mechanism and a valve delivery device. Background Art

[0002] The heart is a very important organ in the human body, providing power for the human body's blood circulation. The heart is divided into two parts, each of which contains a ventricle and an atrium. The ventricles and atria are separated by the ventricular septum and the atrial septum. There are valves between the atria, ventricles, and arteries to prevent blood reflux. The valve between the left atrium and the left ventricle is the mitral valve, the valve between the right atrium and the right ventricle is the tricuspid valve, the valve between the left ventricle and the aorta is the aortic valve, and the valve between the right ventricle and the pulmonary artery is the pulmonary valve.

[0003] The above valves will open and close accordingly with the contraction and relaxation of the heart, so the heart valves must be able to withstand the squeezing and flushing of blood and the surrounding valve rings for a long time. If the valve cannot be completely closed or is not fully opened due to disease or other reasons, it will lead to blood reflux and insufficient blood supply. For example: Valvular stenosis leading to poor blood circulation or incomplete closure will lead to insufficient blood supply to the heart, which will greatly increase the burden on the heart and lead to heart failure. For this type of heart valve disease, the traditional treatment method is to open the chest and stop the heart. Under the support of low-temperature systemic circulation, open the heart for surgical repair of the valve or replacement of the artificial valve. After the operation is completed, the heart is restarted to complete the subsequent operation. Surgical valve replacement is traumatic and the patient's recovery time is long. Therefore, it is often contraindicated for elderly patients due to advanced age, weak constitution, severe lesions or other combined diseases.

[0004] Minimally invasive surgical techniques are constantly developing. Among them, artificial heart valves can be introduced into the patient's body through a catheter, that is, the heart valve is placed through minimally invasive interventional surgery. The surgery does not require thoracotomy, so the trauma is small and the recovery after surgery is fast. It provides a new solution for patients with heart valve stenosis whose lives cannot be prolonged or relieved by current conventional treatments. At present, the process of implanting an interventional artificial heart valve into the body usually relies on a certain delivery device to deliver the interventional artificial heart valve to a predetermined location for release. However, when the existing heart valve delivery device is delivering, it is unknown to what specific location it is delivered to and whether it is released in place. When using it, the doctor relies entirely on experience. For this reason, an outer tube moving mechanism and a valve delivery device are proposed. Summary of the invention

[0005] The present invention will solve the technical problem that the existing heart valve delivery device cannot accurately determine when the valve can be released during delivery, and provide an outer tube moving mechanism and a valve delivery device.

[0006] The technical solution provided by the present invention is as follows:

[0007] An outer tube moving mechanism comprises: a threaded tube, wherein a sliding hole is provided on the threaded tube, and a baffle is provided on the inner wall of the threaded tube; a rotating mechanism is arranged on the outer wall of the threaded tube, and the rotating mechanism can engage with the threaded teeth on the threaded tube; a fixing part is arranged in the threaded tube, and the rotating mechanism rotates or slides to drive the fixing part to slide along the sliding hole; and a sealing pin, which is arranged in the fixing part; a push piece is provided at one end of the sealing pin, and when the rotating mechanism drives the push piece to push to the baffle, the push piece knocks on the surface of the baffle.

[0008] In this technical solution, when the outer tube is released to the required position, the push-piece structure is bent by force, and after sweeping across the surface of the baffle bar, it will immediately elastically recover and hit the next thread tooth, making a sound and vibration. When the valve is fully released and operates normally, the sealing pin pushes the pin in the valve uncoupling mechanism to the right, unlocking the uncoupling button, and only then can the uncoupling button be pressed to perform the valve uncoupling operation.

[0009] Preferably, a barb for engaging with the side wall of the fixing member is provided on the side wall of the sealing pin.

[0010] Preferably, a stopper is connected to the side wall of one end of the sealing pin away from the outer tube connection push piece.

[0011] Preferably, the threaded tube is composed of two semi-threaded parts spliced ​​together, a sliding hole is formed at a spliced ​​portion of the two semi-threaded parts, the two semi-threaded parts are centrally symmetrical, and the thread profile of the threaded teeth opened on the threaded tube has no inclination.

[0012] Preferably, the thread shapes of the semi-threaded parts at the same height are the same.

[0013] Preferably, the rotating mechanism includes a rotating shell and a threaded engaging mechanism connected to the rotating shell. The threaded engaging mechanism is formed by two engaging parts being staggeredly connected by an elastic part. The elastic part enables the two engaging parts to engage with the threaded tube, and the two engaging parts are centrally symmetrical. The engaging parts are provided with engaging teeth that match the tooth shape on the threaded tube.

[0014] Preferably, one end of two fins is connected to the side wall of the fixing member, the other end of the fin passes through the sliding hole and is located in a rotating groove provided on the rotating shell, and one end of the fin located in the rotating groove is connected to a damping ring.

[0015] A heart valve delivery device comprises any one of the above-mentioned outer tube moving mechanisms, an outer tube and a valve unhooking mechanism connected to the outer tube moving mechanism, wherein a fixing part in the outer tube moving mechanism is connected to the outer tube, and when the limiting state of the valve unhooking mechanism is released by moving the outer tube moving mechanism, the valve unhooking mechanism is moved to unhook the valve.

[0016] Preferably, a joint is fixedly connected to one end of the fixing member away from the push piece, the outer tube is threadedly connected to the fixing member via a nut, and a side wall of the joint abuts against an inner wall of one end of the outer tube.

[0017] Preferably, the outer wall of the joint is provided with a barb ring.

[0018] Compared with the prior art, the outer tube moving mechanism and valve delivery device provided by the present invention have the following beneficial effects:

[0019] 1. The present invention arranges a push piece on the sealing pin and a baffle on the semi-threaded part. When the doctor operates, the threaded engagement mechanism rotates to drive the outer tube to move. When the outer tube moves to the point where the push piece contacts the baffle, the baffle will block the push piece from moving forward, and the push piece will bend under force. When the push piece bends to the point where it can sweep over the baffle, the push piece will hit the side wall of the next screw thread and make a crisp sound, thereby prompting the doctor to which position the outer tube has moved.

[0020] 2. The present invention changes the shape of the threads on the outer wall of the threaded tube. The threaded tube is composed of two semi-threaded parts. The two semi-threaded parts are centrally symmetrical, and the pitch between the threads on the semi-threaded parts is large. At the same time, the threads on the semi-threaded parts have no slope, so that the threads on the threaded tube will not generate outward thrust on the matching threaded engaging parts. This ensures that the doctor can release the valve quickly. At the same time, the threads without slope will not be released too much during the doctor's release process, thereby achieving the effect of both quick release and stable operation.

[0021] 3. The present invention arranges a damping ring on the fin, which is different from the damping ring arranged on the outer wall of the fixing part in the past. The damping ring in the present technical solution, on the one hand, increases the self-locking function of the thread of the threaded tube to prevent the large-pitch thread on the threaded tube from slipping; on the other hand, the damping ring has a damping feeling, so that the doctor can be very stable when performing the operation without releasing too quickly.

[0022] 4. The present invention provides a barbed hook ring on the joint where the fixing piece and the outer tube are connected, which, on the one hand, increases the firmness of the connection and, on the other hand, can play a sealing role and facilitate emptying. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The preferred implementation scheme will be described below in a clear and understandable manner in conjunction with the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of an outer tube moving mechanism and a valve delivery device.

[0024] Figure 1 It is a three-dimensional structural schematic diagram of a part of the outer tube moving mechanism of the present invention;

[0025] Figure 2 is a cross-sectional schematic diagram of the fixing member and the sealing pin after installation of the present invention;

[0026] Figure 3 It is a schematic diagram of the three-dimensional structure after the fixing member and the sealing pin of the present invention are installed;

[0027] Figure 4 It is a three-dimensional structural schematic diagram of the sealing pin of the present invention;

[0028] Figure 5 It is a schematic diagram of the structure after the push piece on the sealing pin of the present invention contacts with the stop bar;

[0029] Figure 6 It is a schematic diagram of the structure after the bite pieces of the present invention are connected;

[0030] Figure 7 It is a partial structural schematic diagram of the semi-threaded member of the present invention;

[0031] Figure 8 is a cross-sectional schematic diagram of the valve decoupling mechanism of the present invention;

[0032] Fig. 9 It is a three-dimensional structural schematic diagram of a partial structure of the valve decoupling mechanism of the present invention;

[0033] Fig.10 It is a schematic diagram of the structure of the special-shaped tube of the present invention;

[0034] Fig.11 It is a schematic structural diagram of the special-shaped pipe and the limiting pipe of the present invention after being connected and not being unhooked;

[0035] Fig.12 It is a schematic structural diagram of the special-shaped pipe and the limiting pipe of the present invention after being connected and unhooked;

[0036] Fig.13 It is a partial structural schematic diagram of the guide wire of the present invention;

[0037] Fig.14 It is a schematic structural diagram of the delivery device of the present invention in a state where the valve is not released and not unhooked;

[0038] Fig.15 It is a schematic diagram of the structure of the delivery and transfer device of the present invention in the valve unhooking state.

[0039] Description of the reference numerals: housing 100, upper housing 110, lower housing 120, handle 130;

[0040] The limiting tube 210, the fixing tube 220, the limiting groove 230, the button 240, the first spring 250, the latch 260, the push rod 270, the second spring 280, the first sealing ring 290, the limiting member 2110, and the mounting tube 2120;

[0041] Guide wire 300, fixing claw 310, special-shaped tube 320;

[0042] Threaded tube 400, semi-threaded member 401, stop bar 402;

[0043] The fixing member 510, the fin 520, the damping ring 530, the sealing pin 540, the sealing cylinder 541, the barb 542, the stopper 543, the push piece 544, the outer tube 550, the nut 560, the joint 570, the barb ring 571, the sealing ring 580, the drain pipe 590, and the second sealing ring 5100;

[0044] The engaging member 610, the self-locking spring 620, the unlocking button 630, the rotating shell 640, and the rotating slot 641;

[0045] Fixed shell 700;

[0046] Conical head 800;

[0047] Capillary 900. DETAILED DESCRIPTION

[0048] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0049] In order to simplify the drawings, only the parts related to the invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically drawn or marked. In this article, "one" not only means "only one", but also means "more than one".

[0050] According to an embodiment provided by the present invention, an outer tube moving mechanism, such as Figure 1 , Figure 4 and Figure 7As shown, it includes a threaded tube 400, a sliding hole is provided on the threaded tube, and a plurality of retaining bars 402 are provided on the inner wall of the threaded tube 400. During specific implementation, one end of the threaded tube 400 is connected to the fixed tube 220 in the valve decoupling mechanism, and the other end of the threaded tube 400 is connected to the fixed shell 700. The threaded tube 400 is assembled together by two semi-threaded parts 401, and a sliding hole is formed at a section of the two semi-threaded parts 401. The fixing part 510 can move along the sliding hole. The two semi-threaded parts 401 are centrally symmetrical, and the threaded teeth provided on the threaded tube 400 have no inclination, which can ensure that the threaded teeth on the threaded tube 400 will not generate outward thrust on the matching threaded bite part 610. The threaded teeth of the semi-threaded parts 401 at the same height have the same shape. During specific implementation, the two semi-threaded parts 401 has the same shape and can be divided into two halves, each lobe is the same, and when opening the mold, half of the mold cost can be saved, which can save manpower and material resources; the threaded tube 400 formed by the two half-threaded parts 401 is a double-threaded tube or a four-threaded tube, and the lead of the threaded tube 400 is 6-16mm, and the thread pitch of the threaded tube is 3-8mm, but in the specific implementation, the lead is 12mm and the thread pitch is 6mm, which can achieve the effect of quickly releasing the valve, and the inner walls of the two half-threaded parts 401 are provided with sliding grooves, and a plurality of baffles 402 are provided in the sliding grooves, and adjacent baffles 402 are spaced a certain distance apart. The sliding grooves are provided so that the push piece 544 described below is always in the sliding groove and slides, and will not be squeezed and deformed with the inner wall of the half-threaded part 401, thereby protecting the push piece 544.

[0051] like Figure 1 and Figure 6 As shown, a rotating mechanism is arranged on the outer wall of the threaded tube 400, and the rotating mechanism can engage with the thread teeth on the threaded tube 400. The rotating mechanism includes a rotating shell 640 and a threaded engaging mechanism connected in the rotating shell 640. The threaded engaging mechanism is formed by two engaging members 610 being staggered and connected through a self-locking elastic member. The self-locking elastic member enables the two engaging members 610 to engage with the threaded tube 400. In this embodiment, the self-locking elastic member is a self-locking spring 620. The two self-locking springs 620 are in a compressed state, and the two engaging members 610 are centrally symmetrical. Engaging teeth matching the tooth shape on the threaded tube 400 are provided. In actual operation, this can ensure that the two engaging parts 610 are always in an engaged state on the threaded tube 400. When quick release is required, it is only necessary to press the unlocking button 630 connected to the two engaging parts 610 to compress the two self-locking springs 620 and move the two engaging parts 610 away from each other to ensure that the two engaging parts 610 are detached from the outer wall of the threaded tube 400. In this way, the fixing part 510 can be driven to slide quickly by the rotating shell 640, thereby driving the outer tube 550 to move quickly.

[0052] like Figure 2and Figure 3 As shown, as well as a fixing member 510 arranged in the threaded tube 400, the rotating mechanism rotates or slides to drive the fixing member 510 to slide along the sliding hole, and a sealing pin 540 is arranged in the fixing member 510. During the specific implementation, the sealing pin 540 includes a sealing cylinder 541, and the sealing pin 540 is located in the fixing member 510. A second sealing ring 5100 is sleeved on the side wall at one end thereof. A water injection hole is opened on the side wall at one end of the fixing member 510 close to the outer tube 550, and one end of an emptying pipe 590 communicating with the water injection hole is connected to the fixing member 510, and the other end of the emptying pipe 590 passes through the sliding hole and reaches the outside of the threaded tube 400; a push piece 544 is provided at one end of the sealing cylinder 541, and the push piece 544 slides in the sliding groove, so that the push piece 544 is always in the sliding groove and will not be deformed and damaged for a long time. When the rotating mechanism drives the push piece 544 to be pushed to the baffle 402, as shown in FIG. Figure 5 As shown, the push piece 544 hits the surface of the baffle 402, and the push piece 544 sweeps across the surface of the baffle 402 to emit a warning sound. When the threaded engagement mechanism engages with the threaded tube 400, the threaded engagement mechanism is rotated to drive the fixing member 510 to slide slowly along the sliding hole.

[0053] like Figure 2-4 As shown, in a specific implementation, a barb 542 for fixing to the side wall of the fixing member 510 is provided on the side wall of the sealing cylinder 541. The barb 542 is to allow the sealing pin 540 to be better connected to the fixing member 510, and the sealing pin 540 is not easily separated from the fixing member 510 during the movement. A stopper 543 is connected to the side wall of one end of the sealing cylinder 541 connected to the push piece 544. When the stopper 543 is installed, it can ensure that the sealing pin 540 is installed in a suitable position.

[0054] like Figure 2 and Figure 3 As shown, in another embodiment of the present invention, one end of two fins 520 are connected to the side wall of the fixing member 510, and the other end of the fin 520 passes through the sliding hole and is located in a rotating groove 641 opened on the rotating shell 640 in the threaded engagement mechanism, and one end of the fin 520 located in the rotating groove 641 is connected to a damping ring 530. In this embodiment, the fin 520 connected to the side wall of the fixing member 510 is on the one hand to enable the rotating shell 640 to drive the fixing member 510 to move, and on the other hand, the damping ring 530 is provided on the fin 520 to prevent the engagement mechanism from releasing the valve too quickly when rotating, thereby improving the accuracy and safety of the operation and enhancing the self-locking function of the thread.

[0055] like Fig.14 and Fig.15As shown, a heart valve delivery device includes the above-mentioned outer tube moving mechanism, an outer tube 550 and a valve unhooking mechanism connected to the outer tube moving mechanism, wherein the fixing part 510 in the outer tube moving mechanism is connected to the outer tube 550, and when the limiting state of the valve unhooking mechanism is released by moving the outer tube moving mechanism, the valve unhooking mechanism is moved to unhook the valve.

[0056] like Figure 8 As shown, the valve unhooking mechanism is used to cooperate with the outer tube moving mechanism to complete the valve unhooking operation; the valve unhooking mechanism includes a mounting shell and a fixing cylinder 220 slidably arranged in the mounting shell; a mounting groove is provided on the mounting shell, and a limiting groove 230 (not shown) is provided on the outer wall of the fixing cylinder 220, and a limiting member 2110 is provided on the outer shell of the fixing cylinder 220, and the limiting member 2110 is engaged in the limiting groove 230, and the limiting member 2110 is movably arranged in the mounting groove (not shown), and the limiting member 2 A limiting hole (not shown) is provided on 110; the valve uncoupling mechanism further includes: a limiting mechanism, which passes through the limiting hole to limit the limiting member 2110; an elastic member, which is arranged in the mounting shell, and in the first state, the elastic member enables the limiting mechanism to be inserted into the limiting hole; in the second state, the outer tube moving mechanism can act on the limiting mechanism to make it withdraw from the limiting hole against the elastic force of the elastic member, and the first state and the second state are both before the valve is unhooked. In this embodiment, the specific position of the elastic member is not limited.

[0057] like Fig. 9 As shown, in a specific implementation, the mounting shell includes a shell 100 and a handle 130. The shell 100 is formed by buckling an upper shell 110 and a lower shell 120. The handle 130 is engaged in the shell 100. A through hole is provided on the handle 130. A section of the inner side of the limiting member 2110 is engaged in the limiting groove 230 to ensure that the fixing cylinder 220 can be engaged when in use. The outer side of the limiting member 2110 is located in the mounting groove provided on the shell 100, so that the limiting member 2110 can slide in the mounting groove, thereby ensuring that the fixing cylinder 220 can be well limited. In this embodiment, refer again to Figure 8As shown, the limiting member 2110 is connected with a button 240, and the button 240 can be integrally formed with the limiting member 2110 so as to be well released. An elastic body is arranged in the installation groove to resist the limiting member 2110 so that the limiting member 2110 is engaged in the limiting groove 230. The elastic body is a first spring 250, one end of the first spring 250 is against the inner wall of the installation groove, and the other end of the first spring 250 is against the side wall of the limiting member 2110. The first spring 250 ensures that the limiting member 2110 can always be engaged in the limiting groove 230 when the button 240 is not pressed. In addition to the first spring 250 in this embodiment, A spring sheet is arranged at the connection between the button 240 and the limiting member 2110, and the spring sheet is in an arc shape. Both ends of the spring sheet are connected to the housing 100. When in the limiting state, the spring sheet is in an arc shape, ensuring that the limiting member 2110 can play a limiting role on the fixed cylinder 220. When the limiting is released, the button 240 is pressed, the spring sheet is deformed, and the limiting member 2110 is separated from the limiting groove 230. When the hand is released, the limiting member 2110 can return to its original state under the action of the spring sheet. In this embodiment, a first spring 250 is selected as an elastic component to maintain the limiting member 2110 engaged in the limiting groove 230. The first spring 250 is durable and is not easily damaged compared to the spring sheet, thereby increasing the service life of the device.

[0058] See again Figure 8 As shown, the limiting mechanism specifically includes: a latch 260, which is formed by an abutment portion and a pin portion connected to the abutment portion, and the pin is inserted into the limiting hole to limit the limiting member; one end of a push rod 270 is connected to the latch 260, and the other end of the push rod 270 passes through the fixed cylinder 220 and reaches the outside of the fixed cylinder 220. In a specific implementation, the end of the push rod 270 away from the latch 260 is located at the stop bar 402 described below, so that the push piece 544 described below cooperates to push the latch 260 out of the limiting state. When the push piece 544 sweeps over the stop bar 402, it starts to push the push rod 270. In this embodiment, the elastic member is a second spring 280. There are two positions for setting the elastic member. The elastic member is arranged between the mounting shell and the limiting mechanism, and is used to resist the limiting mechanism, so that the limiting mechanism is inserted into the limiting hole in the first state to limit the limiting member 2110 (see again). Figure 8 specifically, one end of the second spring 280 abuts against the abutting portion, and the other end of the second spring 280 abuts against the handle 130 described below, at which time the second spring 280 is in a compressed state.

[0059] Or the two ends of the elastic member are respectively connected to the fixed tube 220 and the limiting mechanism, so as to maintain the limiting mechanism inserted into the limiting hole, so that the limiting mechanism limits the limiting member 2110 in the first state (not shown). In a specific implementation, one end of the second spring 280 is connected to the latch 260, and the other end of the second spring 280 is connected to the fixed tube 220. At this time, the second spring is in a natural state or a stretched state.

[0060] See again Figure 8 As shown, in a specific implementation, the latch 260 is formed by an abutment portion and a pin portion perpendicular to the abutment portion, the pin is inserted into the socket and extends to the limiting hole provided on the limiting member 2110 to limit the limiting member 2110; the pin is connected to the edge of the abutment portion, one end of the push rod 270 is also connected to the edge of the abutment portion, and the other end of the push rod 270 passes through the fixed cylinder 220. In this embodiment, the abutment portion can be a plate-like structure, and a socket is provided on the fixed cylinder 220, and the socket is communicated with the limiting groove 230, so that the pin can pass through the socket to reach the limiting hole to limit the limiting member 2110.

[0061] See again Figure 8 As shown, the valve uncoupling mechanism also includes a mounting tube 2120, and the opposite ends of the fixed tube 220 and the handle 130 are inserted into the same mounting tube 2120, and the side walls of the fixed tube 220 and the handle 130 at one end located in the mounting tube 2120 are both sleeved with a first sealing ring 290. Compared with the handle 130 of the existing Luer interface, the existence of the first sealing ring 290 can play a sealing role on the one hand, and on the other hand, it can bring a damping feeling when the fixed tube 220 moves, so as to ensure that the doctor can be very stable during the operation.

[0062] See again Figure 10-12 As shown, the valve unhooking mechanism also includes a special-shaped tube 320, which is connected to the limiting tube 210, and the end of the guide wire 300 away from the handle 130 passes through the limiting tube 210 and the special-shaped tube 320 in sequence and is connected to the fixing claw 310. A number of grooves are provided on the side wall of the special-shaped tube 320 so that when the valve is released, the special-shaped tube 320 can be bent in a single direction, making it easy to release and expand the valve. The end of the special-shaped tube 320 away from the limiting tube 210 is connected to a developing ring, which is convenient for the doctor to observe during the operation. The section of the guide wire 300 located in the special-shaped tube 320 is a structure with bulging ends and a thin middle, which is conducive to bending with the special-shaped tube 320 (such as Fig.13 shown).

[0063] like Fig.14 and Fig.15 As shown, during the specific installation, the limiting tube is connected to a conical head 800 through a thin tube 900 at the distal end. The conical head 800 is used to guide the delivery device into the surgical site.

[0064] like Figure 2 As shown, during the specific implementation, the end of the fixing member 510 away from the push piece 544 is fixedly connected with the joint 570, and a sealing ring 580 is provided at the contact point between the joint 570 and one end of the outer tube 550 to improve the sealing effect. The outer tube 550 is threadedly connected to the fixing member 510 through a nut 560, and the side wall of the joint 570 abuts against the inner wall of the end connected to the outer tube 550, and the outer wall of the joint 570 is provided with a barb ring 571.

[0065] Based on the above embodiment, during loading, the outer tube moving mechanism is moved so that the push piece 544 pushes the push rod 270 on the valve unhooking mechanism, so that the pin in the latch 260 is out of the limit position, the button 240 is pressed, the limit tube 210 is moved, the fixing claw 310 is exposed, and then the valve is fixed on the fixing claw 310. Due to the existence of the special-shaped tube 320, the valve is fixed by multiple special-shaped tubes 320 and the matching fixing claws 310, which makes it easier to unfold the valve when it is unfolded. Then, the limit tube 210 is moved so that the valve hanging ear and the fixing claw 310 are put into the special-shaped tube 320 together, and the special-shaped tube 320 and the valve are put into the outer tube 550. Then, the outer tube 550 is moved so that the conical head 800 contacts the outer tube 550.

[0066] During delivery, the doctor inserts the tip of the delivery device into the surgical site, and then slowly rotates the rotating shell 640 to drive the outer tube 550 to move. At this time, it can move slowly. When the doctor needs to move the outer tube 550 quickly during the operation, the doctor can press the unlocking button 630 to quickly drive the outer tube 550 to move. When the outer tube 550 moves to the baffle 402, a crisp sound is emitted to alert the doctor that it is about to enter the position of releasing the valve. When the outer tube 550 moves to the push piece 544 and pushes the push rod 270, the pin 260 slowly exits the limiting state. Pressing the button 240 can move the limiting tube 210 to release the limit on the valve. At this time, the valve can enter the unhooking state. The doctor can release it quickly or slowly as needed, so that when the release position is incorrect, the valve can be recovered.

[0067] It should be noted that the above embodiments can be freely combined as needed. The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered as the protection scope of the present invention.

Claims

1. An outer tube moving mechanism, suitable for a heart valve delivery device, the heart valve delivery device comprising a valve unhooking mechanism connected to the outer tube moving mechanism, characterized in that: include: A threaded tube, wherein a sliding hole is provided on the threaded tube, and a retaining strip is provided on the inner wall of the threaded tube; A rotating mechanism is arranged on the outer wall of the threaded tube, and the rotating mechanism can engage with the thread teeth on the threaded tube; A fixing member is arranged in the threaded tube, and the rotating mechanism can rotate or slide to drive the fixing member to slide along the sliding hole; as well as, A sealing pin, the sealing pin being disposed in the fixing member; The sealing pin includes a sealing tube, one end of which is provided with a push piece, and when the rotating mechanism drives the push piece to the baffle, the push piece knocks the surface of the baffle; and, when the push piece sweeps over the baffle, the push piece is suitable for pushing the push rod in the valve uncoupling mechanism, and the push rod then pushes the pin in the valve uncoupling mechanism to exit the limited state, so as to release the limited state of the valve uncoupling mechanism and allow the valve uncoupling mechanism to move for valve uncoupling.

2. The outer tube moving mechanism according to claim 1, characterized in that: The side wall of the sealing pin is provided with a barb for engaging with the side wall of the fixing member.

3. An outer tube moving mechanism according to claim 1 or 2, characterized in that: A stopper is connected to the side wall of one end of the sealing pin away from the outer tube connection push piece.

4. The outer tube moving mechanism according to claim 1, characterized in that: The threaded tube is composed of two semi-threaded parts spliced ​​together, a sliding hole is formed at a spliced ​​portion of the two semi-threaded parts, the two semi-threaded parts are centrally symmetrical, and the thread profile of the threaded teeth opened on the threaded tube has no inclination.

5. The outer tube moving mechanism according to claim 4, characterized in that: The thread shapes of the semi-threaded parts at the same height are the same.

6. The outer tube moving mechanism according to claim 1, characterized in that: The rotating mechanism includes a rotating shell and a threaded engaging mechanism connected to the rotating shell. The threaded engaging mechanism is formed by two engaging parts being staggeredly connected by a self-locking elastic part. The elastic part enables the two engaging parts to engage with the threaded tube, and the two engaging parts are centrally symmetrical. The engaging parts are provided with engaging teeth that match the tooth shape on the threaded tube.

7. The outer tube moving mechanism according to claim 6, characterized in that: One end of two fins is connected to the side wall of the fixing member, the other end of the fin passes through the sliding hole and is located in a rotating groove opened on the rotating shell, and one end of the fin located in the rotating groove is connected to a damping ring.

8. A heart valve delivery device, characterized in that: It comprises the outer tube moving mechanism as described in any one of claims 1 to 7, an outer tube and a valve unhooking mechanism connected to the outer tube moving mechanism, wherein a fixing part in the outer tube moving mechanism is connected to the outer tube, and when the limiting state of the valve unhooking mechanism is released by moving the outer tube moving mechanism, the valve unhooking mechanism is moved to unhook the valve.

9. A heart valve delivery device according to claim 8, characterized in that: One end of the fixing member away from the push piece is fixedly connected with a joint, the outer tube is connected to the fixing member through a nut, and the side wall of the joint abuts against the inner wall of the end connected to the outer tube.

10. A heart valve delivery device according to claim 9, characterized in that: The outer wall of the joint is provided with a barb ring.

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