Delivery device for delivering a self-expanding stent

Abstract

The present invention relates to the technical field of medical devices, and in particular to a conveying device for conveying a self-expanding stent. The conveying device comprises a shell assembly, a catheter mechanism, an operating mechanism and a braking mechanism. The catheter mechanism is arranged on the shell assembly, the operating mechanism is rotatably arranged on the shell assembly, the operating mechanism is transmission-connected to the catheter mechanism, the braking mechanism comprises a braking unit and an orientation unit, the braking unit is rotatably arranged on the shell assembly, the orientation unit is fixedly arranged on the shell assembly, the braking unit is transmission-connected to the operating mechanism, a plurality of braking parts are arranged on the braking unit, a braking gap is formed between two adjacent braking parts, the orientation unit cooperates with the braking gap, a plurality of braking parts are annularly arranged on the outer peripheral wall of the braking unit, the braking range is wider, the movement accuracy of the braking unit is improved, the braking unit is suitable for the needs with higher requirements for position and posture control, the adaptability is stronger, and the structure is simple, thereby improving the braking efficiency and stability.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a conveying device for conveying a self-expanding stent. Background Art

[0002] In the prior art, during surgery, a delivery device and a self-expanding stent are usually used in combination for treatment. Specifically, the self-expanding stent pre-loaded in the delivery device tube is delivered to the desired position in the body's blood vessels through percutaneous delivery, and then the stent is released through the movement mechanism of the delivery device. The released stent expands by itself to support the blood vessels and restore the vascular pathway.

[0003] The delivery device on the market consists of two parts: a catheter and a delivery device. The catheter part is used to carry and release the stent, and the delivery device includes an operating mechanism and a braking mechanism. The operating mechanism operates the catheter part by rotation to release the stent in the catheter, while the braking mechanism is used to limit the reverse rotation of the operating mechanism to avoid component damage and functional failure caused by the reversal of the operating mechanism. However, the existing braking mechanism has a limited braking range and low motion accuracy. It cannot be applied to the needs with high requirements for position and posture control, has low adaptability, and has a relatively complex structure. Summary of the invention

[0004] The present invention provides a conveying device for conveying a self-expanding stent, which is used to solve the problems that the braking mechanism of the conveying device in the prior art has low movement accuracy, cannot be applied to the needs with high requirements for position and posture control, has low applicability, and has a relatively complex structure.

[0005] The present invention provides a delivery device for delivering a self-expanding stent, comprising:

[0006] Shell assembly;

[0007] A catheter mechanism, the catheter mechanism is arranged on the housing assembly, and the catheter mechanism is used to carry and release the stent;

[0008] An operating mechanism, the operating mechanism is rotatably disposed on the housing assembly, the operating mechanism is transmission-connected to the catheter mechanism, and the operating mechanism drives the catheter mechanism to move so as to release the stent;

[0009] A braking mechanism, the braking mechanism comprising a braking unit and an orientation unit, the braking unit being rotatably disposed on the housing assembly, the orientation unit being fixedly disposed on the housing assembly, the braking unit being transmission-connected to the operating mechanism, the braking unit being provided with a plurality of braking parts, a braking gap being formed between two adjacent braking parts, the orientation unit cooperating with the braking gap to limit the rotation direction of the braking unit;

[0010] Wherein, a plurality of the braking parts are arranged in a ring shape on the outer peripheral wall of the braking unit.

[0011] According to a conveying device for conveying a self-expanding stent provided by the present invention, the braking portion is a convex tooth provided on the braking unit, the braking gap is a tooth groove formed between two adjacent convex teeth, and the orientation unit is engaged with the tooth groove.

[0012] According to a delivery device for delivering a self-expanding stent provided by the present invention, the orientation unit comprises:

[0013] A first fixing member, the first fixing member is located in the housing assembly, and the first fixing member is fixedly connected to the housing assembly;

[0014] a second fixing member, the second fixing member being located in the housing assembly, the second fixing member being fixedly connected to the housing assembly, and a clamping channel being formed between the first fixing member and the second fixing member;

[0015] A brake member, the brake member having a fixed section and a swing section, the fixed section is clamped in the clamping channel, the swing section extends out of the clamping channel, the swing section can swing relative to the second fixed member, and the swing section cooperates with the brake gap;

[0016] A stopper is convexly provided on the first fixing member, and the orthographic projections of the stopper and the second fixing member are misaligned. The stopper abuts against the swing section to limit the swing section from swinging toward the first fixing member.

[0017] According to a delivery device for delivering a self-expanding stent provided by the present invention, the housing assembly is provided with a mounting shaft, and the braking unit comprises:

[0018] A connecting column, wherein the connecting column is provided with a mounting channel, the mounting shaft is plugged and rotationally matched with the mounting channel, the connecting column and the operating mechanism are mutually nested and relatively fixed;

[0019] A truncated cone is connected to the connecting column, the truncated cone is arranged around the mounting channel of the connecting column, a plurality of braking parts are connected to the truncated cone, and the plurality of braking parts are evenly distributed along the outer peripheral wall of the truncated cone.

[0020] According to a delivery device for delivering a self-expanding stent provided by the present invention, the connecting column is provided with a first positioning structure, and the operating mechanism is provided with a second positioning structure. The first positioning structure and the second positioning structure are snap-fitted to relatively fix the connecting column and the truncated table.

[0021] According to a delivery device for delivering a self-expanding stent provided by the present invention, one of the first positioning structure and the second positioning structure is a positioning protrusion, and the other of the first positioning structure and the second positioning structure is a positioning groove, and the positioning protrusion is snap-fitted with the positioning groove.

[0022] According to a delivery device for delivering a self-expanding stent provided by the present invention, a bypass channel is provided on the shell component, the operating mechanism is located in the shell component, and a part of the structure of the operating mechanism extends out of the shell component through the bypass channel;

[0023] Wherein, the housing assembly is also provided with an anti-trigger structure, and the anti-trigger structure can cover or avoid the operating mechanism.

[0024] According to a delivery device for delivering a self-expanding stent provided by the present invention, the anti-trigger structure comprises:

[0025] Two mounting members, the two mounting members are respectively arranged on opposite sides of the housing assembly, and the mounting members are detachably connected to the housing assembly;

[0026] A cover body, the cover body covers the operating area of ​​the operating mechanism located outside the housing assembly, and opposite sides of the cover body are fixedly connected to the two mounting members in a one-to-one correspondence.

[0027] Wherein, the two mounting parts are both connected with a pressing part, and when the two pressing parts move toward each other, the two mounting parts are disconnected from the shell assembly.

[0028] According to a delivery device for delivering a self-expanding stent provided by the present invention, one of the mounting member and the shell assembly is provided with an insertion protrusion, and the other of the mounting member and the shell assembly is provided with an insertion recess, and the insertion protrusion is plug-matched with the insertion recess.

[0029] According to a delivery device for delivering a self-expanding stent provided by the present invention, the operating mechanism is transmission-connected to the catheter mechanism via a transmission assembly;

[0030] The catheter mechanism comprises:

[0031] A first catheter, wherein the distal end of the first catheter is used to fit the bracket, and the proximal end of the first catheter is used to be fixed in the housing assembly;

[0032] a second catheter, wherein the second catheter is sleeved on the first catheter, the distal end of the second catheter is used to cover the stent, the proximal end of the second catheter is inserted into the housing assembly, and the distal end of the second catheter has a diameter-reducing section;

[0033] A first track tube, wherein a proximal end of the first track tube is disposed in the housing assembly, a distal end of the first track tube is located between the first catheter and the second catheter, and the second catheter is movable relative to the first track tube;

[0034] a second track tube, the proximal end of the second track tube being disposed in the housing assembly;

[0035] an intermediate tube, the intermediate tube being disposed between the first conduit and the second conduit, the proximal end of the intermediate tube being inserted into the housing assembly, and the distal end of the intermediate tube being abutted against the bracket to limit the relative movement of the bracket to the first conduit;

[0036] A protection tube, the protection tube is fixedly inserted in the second track tube, and the protection tube is sleeved outside the second guide tube;

[0037] The transmission assembly includes a moving member and a traction guide wire, the moving member is movably arranged in the second track tube, the moving member is fixedly connected to the second catheter, the moving member is movable relative to the first track tube, the distal end of the first track tube is inserted into the second track tube and the moving member, one end of the traction guide wire is connected to the operating mechanism and can be wound and matched, and the other end of the traction guide wire extends into the second track tube and is connected to the moving member;

[0038] Among them, the first catheter passes through the second track tube and the moving part, the proximal end of the protective tube is relatively fixed to the distal end of the second track tube, and there is a matching spacing between the distal end of the protective tube and the distal end of the second catheter, and the matching spacing is greater than 2 times the length of the corresponding variable diameter section on the second catheter, the diameter of the protective tube is smaller than the diameter of the distal end area of ​​the second catheter corresponding to the variable diameter section, and the diameter of the protective tube is greater than the diameter of the proximal end area of ​​the second catheter away from the variable diameter section.

[0039] The conveying device for conveying a self-expanding stent provided by the present invention is driven by an operator to rotate the operating mechanism, so that the catheter mechanism connected to the operating mechanism is actuated, thereby releasing the stent; a plurality of braking parts are provided on the braking unit, and a braking gap is formed between two adjacent braking parts, and the directional unit cooperates with the braking gap to limit the rotation direction of the braking unit, thereby preventing the operating mechanism from rotating in the opposite direction. In the above-mentioned braking mechanism, since the plurality of braking parts are arranged in a ring shape on the outer peripheral wall of the braking unit, the braking range is wider, the movement accuracy of the braking unit is improved, and it is suitable for the needs with higher requirements for position and posture control, has stronger adaptability, and has a simple structure, improves braking efficiency and stability, and is conducive to avoiding problems such as poor braking effect and unstable braking due to uneven braking force. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0041] Figure 1 It is a structural schematic diagram of the conveying device provided by the present invention;

[0042] Figure 2 is a cross-sectional schematic diagram of the conveying device provided by the present invention;

[0043] Figure 3 yes Figure 2 A magnified schematic diagram of the structure at center A;

[0044] Figure 4 yes Figure 2 A magnified schematic diagram of the structure at B in the middle;

[0045] Figure 5 yes Figure 2 A magnified schematic diagram of the structure at C in the middle;

[0046] Figure 6 It is an overall exploded schematic diagram of the conveying device provided by the present invention;

[0047] Figure 7 is a partially exploded schematic diagram of the conveying device provided by the present invention;

[0048] Figure 8 It is a schematic diagram of the cooperation between the brake unit and the operating mechanism provided by the present invention;

[0049] Fig. 9 It is a schematic diagram of the cooperation between the housing assembly and the anti-trigger structure provided by the present invention;

[0050] Fig.10 It is a structural schematic diagram of the anti-trigger structure provided by the present invention.

[0051] Reference numerals:

[0052] 100, housing assembly; 110, mounting shaft; 120, avoidance channel; 130, plug-in recess; 140, needle seat; 150, arc-shaped guide plate; 160, first housing; 170, second housing; 180, first protrusion; 181, arc-shaped recess; 190, second protrusion;

[0053] 200, catheter mechanism; 210, first catheter; 220, second catheter; 230, first track tube; 240, second track tube; 250, intermediate tube; 260, protective tube; 270, stress tube; 280, tip; 300, bracket;

[0054] 400, operating mechanism; 410, wire wheel; 411, matching channel; 420, rubber wheel sleeve;

[0055] 510, brake unit; 511, brake part; 5111, brake gap; 512, connecting column; 5121, fixing groove; 513, round table; 520, orientation unit; 521, first fixing member; 522, second fixing member; 523, clamping channel; 524, brake member;

[0056] 610, first positioning structure; 620, second positioning structure; 700, anti-trigger structure; 710, mounting piece; 720, cover body; 730, pressing piece; 711, plug-in protrusion; 810, moving piece; 820, pulling guide wire. DETAILED DESCRIPTION

[0057] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0058] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limitations on the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0059] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0060] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0061] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0062] Combine the following Figure 1-Figure 10 The delivery device for delivering a self-expandable stent of the present invention is described. It should be noted that in the present invention, for the convenience of description, the terms "distal end" and "proximal end" are introduced from the perspective of the operator, wherein the "distal end" refers to the end away from the operator when the delivery device is used, and the "proximal end" refers to the end close to the operator when the delivery device is used, wherein the left side is the distal end and the right side is the proximal end. The "distal end" and "proximal end" are defined only for the convenience of description and are not restrictive.

[0063] like Figure 1 , Figure 2 as well as Figures 6 to 8As shown, according to the present invention, a delivery device for delivering a self-expanding stent is provided, comprising a housing assembly 100, a catheter mechanism 200, an operating mechanism 400 and a braking mechanism, wherein the catheter mechanism 200 is disposed on the housing assembly 100, and the catheter mechanism 200 is used to carry and release the stent 300; the operating mechanism 400 is rotatably disposed on the housing assembly 100, and the operating mechanism 400 is transmission-connected with the catheter mechanism 200, and the operating mechanism 400 drives the catheter mechanism 200 to move to release the stent 300; the braking mechanism comprises a braking unit 51 0 and an orienting unit 520, the braking unit 510 is rotatably disposed on the housing assembly 100, the orienting unit 520 is fixedly disposed on the housing assembly 100, the braking unit 510 is transmission-connected to the operating mechanism 400, a plurality of braking portions 511 are disposed on the braking unit 510, a braking gap 5111 is formed between two adjacent braking portions 511, the orienting unit 520 cooperates with the braking gap 5111 to limit the rotation direction of the braking unit 510, wherein the plurality of braking portions 511 are annularly arranged on the outer peripheral wall of the braking unit 510.

[0064] The conveying device for conveying a self-expanding stent provided by the present invention drives the operating mechanism 400 to rotate by the operator, so that the catheter mechanism 200 connected to the operating mechanism 400 is actuated, thereby releasing the stent 300; a plurality of braking parts 511 are provided on the braking unit 510, and a braking gap 5111 is formed between two adjacent braking parts 511, and the directional unit 520 cooperates with the braking gap 5111 to limit the rotation direction of the braking unit 510, thereby preventing the operating mechanism 400 from rotating in the opposite direction. In the above-mentioned braking mechanism, since the plurality of braking parts 511 are arranged in a ring shape on the outer peripheral wall of the braking unit 510, the braking range is wider, the movement accuracy of the braking unit 510 is improved, and it is suitable for the needs with higher requirements for position and posture control, has stronger adaptability, and has a simple structure, improves braking efficiency and stability, and is conducive to avoiding problems such as poor braking effect and unstable braking due to uneven braking force.

[0065] It is understandable that, referring to Figures 1 to 5 In the embodiment of the present invention, the operating mechanism 400 is transmission-connected to the catheter mechanism 200 via a transmission assembly, and the transmission assembly transmits the power of the operating mechanism 400 to the catheter mechanism 200, thereby realizing the control and operation of the catheter mechanism 200. Through the transmission connection, the power of the operating mechanism 400 can be efficiently transmitted to the catheter mechanism 200, ensuring the accuracy and reliability of the operation.

[0066] Specifically, refer to Figures 1 to 5In some embodiments of the present invention, the catheter mechanism 200 includes a first catheter 210, a second catheter 220, a first track tube 230, a second track tube 240, an intermediate tube 250 and a protective tube 260. The distal end of the first catheter 210 is used to cover the stent 300, and the proximal end of the first catheter 210 is used to be fixed in the shell assembly 100; the second catheter 220 is sleeved on the first catheter 210, the distal end of the second catheter 220 is used to cover the stent 300, the proximal end of the second catheter 220 is inserted in the shell assembly 100, and the distal end of the second catheter 220 has a reducing section; the proximal end of the first track tube 230 is arranged in the shell In the assembly 100, the distal end of the first track tube 230 is located between the first conduit 210 and the second conduit 220, and the second conduit 220 is movable relative to the first track tube 230; the proximal end of the second track tube 240 is arranged in the shell assembly 100; the intermediate tube 250 is arranged between the first conduit 210 and the second conduit 220, the proximal end of the intermediate tube 250 is inserted into the shell assembly 100, and the distal end of the intermediate tube 250 abuts against the bracket 300 to limit the movement of the bracket 300 relative to the first conduit 210; the protective tube 260 is fixedly inserted in the second track tube 240, and the protective tube 260 is sleeved outside the second conduit 220;

[0067] Reference Figures 1 to 5 The transmission assembly includes a moving member 810 and a traction guide wire 820. The moving member 810 is movably disposed in the second track tube 240. The moving member 810 is fixedly connected to the second catheter 220. The moving member 810 is movable relative to the first track tube 230. The distal end of the first track tube 230 is inserted into the second track tube 240 and the moving member 810. One end of the traction guide wire 820 is connected to the operating mechanism 400 and can be wound and matched. The other end of the traction guide wire 820 extends into the second track tube 240 and is connected to the moving member 810.

[0068] Among them, the first catheter 210 passes through the second track tube 240 and the moving part 810, the proximal end of the protective tube 260 is relatively fixed to the distal end of the second track tube 240, and there is a matching spacing between the distal end of the protective tube 260 and the distal end of the second catheter 220. The matching spacing is greater than twice the length of the corresponding variable diameter section on the second catheter 220, the diameter of the protective tube 260 is smaller than the diameter of the distal area of ​​the corresponding variable diameter section on the second catheter 220, and the diameter of the protective tube 260 is greater than the diameter of the proximal area of ​​the second catheter 220 away from the variable diameter section.

[0069] Through the above arrangement, the protective tube 260 is sleeved outside the second conduit 220, which has the function of protecting the conduit mechanism 200 and reducing friction loss. Through the fixed cooperation between the protective tube 260, the second track tube 240 and the second conduit 220, the conduit mechanism 200 is protected from external interference and damage. At the same time, the design of the diameter size of the protective tube 260 can also effectively reduce friction loss and improve the service life of the catheter mechanism 200; through the cooperation of the first track tube 230 and the second track tube 240, effective support is provided for the movement of the moving part 810, and the first track tube 230 is helpful to avoid direct contact between the moving part 810 and the first catheter 210 or the intermediate tube 250, so as to prevent a certain degree of damage to the first catheter 210 or the intermediate tube 250 during the movement, thereby improving the service life; secondly, since the matching spacing is greater than 2 times the length of the reducing section on the second catheter 220, it is helpful to ensure that there is enough space between the protective tube 260 and the second catheter 220 for relative movement. Therefore, through the reasonable design of the catheter mechanism 200 and the transmission assembly, the control and operation of the bracket 300 are realized, with high reliability and service life, and effective optimization is also made in protecting the catheter mechanism 200 and reducing friction loss.

[0070] The specific coordination process between the catheter mechanism 200 and the transmission assembly is as follows: the operating mechanism 400 operates the catheter mechanism 200 through the transmission assembly, pulling the guide wire 820 to drive the movable member 810 to move, and at the same time drives the second catheter 220 fixed on the movable member 810 to move on the first guide rail. When the second catheter 220 moves toward the proximal end, the proximal end of the reducing section reaches the distal end of the protective tube 260. Since the diameter of the reducing section of the second catheter 220 is larger than the diameter of the protective tube 260, the movement of the second catheter 220 is terminated, reminding the operator that the bracket 300 has been completely released.

[0071] It should be noted that the hardness of the protective tube 260 is greater than that of the second catheter 220 . During use, the operator may choose to hold the protective tube 260 to better stabilize the stent 300 delivery system and ensure accurate release of the stent 300 .

[0072] It is understandable that, referring to Figure 1 , Figure 2 as well as Figure 6 In the embodiment of the present invention, the housing assembly 100 is provided with a needle seat 140, which is sleeved with the intermediate tube 250 and the first conduit 210. During use, some solutions, such as lubricants, physiological saline, etc., are filled through the needle seat 140. Specifically, in the present embodiment, the needle seat 140 is provided with a tapered channel, and the expansion direction of the tapered channel faces away from the housing assembly 100, so as to facilitate the cooperation of external accessories (such as needles).

[0073] Specifically, refer to Figure 2 , Figure 3 and Figure 5 In this embodiment, the catheter mechanism 200 also includes a stress tube 270 and a tip. The stress tube 270 is fixedly sleeved outside the protective tube 260 and fixedly connected to the distal end of the second track tube 240. The cross-sectional area of ​​the stress tube 270 gradually increases in the direction close to the shell assembly 100, and the tip 280 is plugged into and matched with the distal end of the second catheter 220.

[0074] It should be noted that the above-mentioned stress tube 270 can be made of a silicone flexible sleeve or other elastic materials, and the first catheter 210, the second catheter 220, the first track tube 230, the second track tube 240, the intermediate tube 250 and the protective tube 260 in the catheter mechanism 200 have a certain flexibility and can produce adaptive bending as needed to facilitate more efficient and safe surgery.

[0075] Specifically, Figure 1 , Figure 2 as well as Figures 6 to 8 As shown, in some embodiments of the present invention, the braking portion 511 is a convex tooth provided on the braking unit 510, the braking gap 5111 is a tooth groove formed between two adjacent convex teeth, and the directional unit 520 is engaged with the tooth groove. It can be understood that one end of the directional unit 520 is loaded into the tooth groove of the braking unit 510, so that the braking unit 510 can only realize the unidirectional rotation of the release direction of the bracket 300 according to the design, the structure is simple, and a reliable braking effect can be provided. Through the cooperation between the directional unit 520 and the tooth groove, the stability of the braking force and the accuracy of the directionality are guaranteed.

[0076] It is understandable that if Figure 2 , Figures 6 to 8 As shown, in the embodiment of the present invention, the orienting unit 520 includes a first fixing member 521, a second fixing member 522 and a braking member 524, the first fixing member 521 and the second fixing member 522 are both arranged in the shell assembly 100, and the first fixing member 521 and the second fixing member 522 are both fixedly connected to the shell assembly 100, a clamping channel 523 is formed between the first fixing member 521 and the second fixing member 522, the braking member 524 has a fixed section and a swinging section, the fixed section is clamped in the clamping channel 523, the swinging section extends out of the clamping channel 523, the swinging section can swing relative to the second fixing member 522, and the swinging section cooperates with the braking gap 5111; wherein, a stop portion is convexly provided on the first fixing member 521, the stop portion and the second fixing member 522 are misaligned in their orthographic projections, and the stop portion abuts and cooperates with the swinging section to limit the swinging section from swinging toward the first fixing member 521.

[0077] With the above structure, the first fixing member 521 and the second fixing member 522 are located in the housing assembly 100, which can help ensure the stability and reliability of the directional unit 520; the brake member 524 is composed of a fixed section and a swing section, the fixed section is located in the clamping channel 523, and the swing section extends out of the clamping channel 523, the swing section can swing relative to the second fixing member 522, and cooperate with the brake gap 5111, the above design can make the swing section have a certain degree of freedom, and can swing as needed, at the same time, because the first fixing member 521 is convexly provided with a stopper, the stopper is misaligned with the positive projection of the second fixing member 522. The stopper is in contact with the swing section to limit the swing of the swing section toward the first fixing member 521, thereby preventing the brake unit 510 from rotating in the opposite direction, thereby avoiding the reversal of the operating mechanism 400, having the technical characteristics of delicate structure and long service life, and can prevent the disadvantages of component damage and functional failure caused by the reversal of the operating mechanism 400.

[0078] Specifically, in the embodiment of the present invention, the brake member 524 is a plate member with a certain elasticity, so when the swing section of the brake member 524 is rotated and pressed by the brake unit 510, the swing section of the brake member 524 is deformed toward the direction of the second fixing member 522 and has a certain curvature, and because the stopper of the first fixing member 521 is in contact with the swing section and restricted, the swing section can only deform in the direction of the second fixing member 522. It should be noted that the plate member can be set as a metal member or a plastic member, which is not limited here.

[0079] It should be noted that, in the embodiment of the present invention, the braking member 524 is a plate, and the shape of the braking member 524 is L-shaped, so the shape of the clamping channel 523 is compatible with the shape of the braking member 524 .

[0080] Specifically, if Figure 7 As shown, in the embodiment of the present invention, the first fixing member 521 is provided with a plurality of recessed portions and a plurality of first supporting portions along its direction shape, the second fixing member 522 is provided with a plurality of second supporting portions, the plurality of recessed portions are matched with the plurality of first supporting portions one by one, and the remaining recessed portions are matched with the second supporting portions one by one, so as to support and fix the brake member 524. The above arrangement is not only conducive to improving the assembly convenience and stability of the brake member 524, but also the use of the recessed portions of the first fixing member 521 to respectively match the first supporting portion and the second supporting portion is conducive to saving materials and reducing production costs.

[0081] It should be noted that, in this embodiment, the brake member 524 is clamped in the clamping channel 523 formed by the first fixing member 521 and the second fixing member 522, and the brake member 524 can be further fixed in the clamping channel 523 by bonding, screws and other connection methods to improve stability.

[0082] Specifically, in this embodiment, both the first fixing member 521 and the second fixing member 522 are integrally injection molded with the shell assembly 100. Through integral injection molding, it can be ensured that there is no looseness or gap between the first fixing member 521, the second fixing member 522 and the shell assembly 100, thereby improving the stability and reliability of the entire orientation unit 520. In addition, it can also reduce the number of parts in the assembly process, simplify the manufacturing process, and improve production efficiency.

[0083] It is understandable that if Figure 2 , Figures 6 to 8 As shown, in some embodiments of the present invention, the shell assembly 100 is provided with an installation shaft 110, the braking unit 510 includes a connecting column 512 and a cone 513, the connecting column 512 is provided with an installation channel, the mounting shaft 110 is plugged into and rotatably matched with the installation channel, the connecting column 512 and the operating mechanism 400 are nested with each other and the two are relatively fixed, the cone 513 is connected to the connecting column 512, the cone 513 is arranged around the installation channel of the connecting column 512, a plurality of braking parts 511 are connected to the cone 513, and the plurality of braking parts 511 are evenly distributed along the outer peripheral wall of the cone 513. With the above design, the shell assembly 100 is provided with a mounting shaft 110, and the connecting column 512 is provided with a mounting channel. The mounting shaft 110 is plugged into and rotatably matched with the mounting channel, which can make the brake unit 510 more convenient and quick to assemble. The connecting column 512 and the operating mechanism 400 are nested with each other and the two are relatively fixed. The cone 513 is arranged around the mounting channel of the connecting column 512, which can make the overall structure of the brake unit 510 compact, occupying a small space, small volume, and wide adaptability; wherein, a plurality of braking parts 511 are evenly distributed along the outer peripheral wall of the cone 513, which can make the braking force evenly distributed, improve the braking efficiency and stability, and avoid problems such as poor braking effect and unstable braking due to uneven braking force. It should be noted that, in the present embodiment, the connecting column 512 and the cone 513 are integrally injection molded. Of course, in some embodiments, the connecting column 512 and the cone 513 can also be detachably connected by means of screws, snap-fits, etc.; the mounting shaft 110 is integrally molded with the shell assembly 100. Of course, the mounting shaft 110 can also be externally mounted to the shell assembly 100, which is not limited here.

[0084] Specifically, refer to Figure 7 and Figure 8In the embodiment of the present invention, the connecting column 512 is provided with a first positioning structure 610, and the operating mechanism 400 is provided with a second positioning structure 620. The first positioning structure 610 and the second positioning structure 620 are engaged with each other so that the connecting column 512 and the round table 513 are relatively fixed. With the above structure, the stability of the assembly of the brake unit 510 and the operating mechanism 400 can be effectively improved, the installation process can be simplified, and the mechanical strength can be enhanced through the engagement of the first positioning structure 610 and the second positioning structure 620.

[0085] Specifically, refer to Figure 7 and Figure 8 In the embodiment of the present invention, the first positioning structure 610 is a positioning protrusion, and the second positioning structure 620 is a positioning groove, and the positioning protrusion is snap-fitted with the positioning groove. Through the above structure, precise positioning can be achieved: through the snap-fitting of the positioning protrusion and the positioning groove, precise positioning can be achieved, ensuring that the relative position between the connecting column 512 and the operating mechanism 400 is fixed, and the contact area between the connecting column 512 and the operating mechanism 400 can be increased, and the connection strength can be improved to make it more stable and reliable. The cooperation between the positioning protrusion and the positioning groove can prevent the relative rotation between the connecting column 512 and the operating mechanism 400, ensuring that no displacement or shaking occurs during use, and making the assembly process simpler and faster, reducing the possibility of assembly errors, and improving the efficiency and consistency of assembly. Of course, in some embodiments, the above-mentioned first positioning structure 610 can also be a positioning groove, and the second positioning structure 620 can also be a positioning protrusion.

[0086] It is understandable that if Figure 1 , Figure 2 as well as Figures 6 to 8 As shown, in the embodiment of the present invention, the operating mechanism 400 includes a wire wheel 410 and a rubber wheel sleeve 420, the wire wheel 410 is provided with a matching channel 411, the connecting column 512 is inserted into the matching channel 411 and is fixed in the circumferential direction, the opposite side walls of the matching channel 411 are provided with positioning grooves, the rubber wheel sleeve 420 and the wire wheel 410 are nested and matched, and the rubber wheel sleeve 420 is provided with anti-slip convex patterns to facilitate the operation of the operator. Specifically, the cross section of the matching channel 411 is non-circular, and the cross section of the connecting column 512 is non-circular. It can be understood that the outer peripheral wall of the connecting column 512 is formed by two arc surfaces and two vertical surfaces connected in an interlaced manner.

[0087] It can be understood that in the embodiment of the present invention, fixing grooves 5121 are provided on opposite sides of the end of the connecting column 512 facing away from the cone 513. During assembly, the proximal end of the traction guide wire 820 passes through the fixing groove 5121 and the positioning groove, and is pressed by the positioning protrusion. The pressing fit mechanism ensures that the braking unit 510 and the operating mechanism 400 move or stop at the same time, which is beneficial to ensure that the traction guide wire 820 can be pulled close and wound around the inner side of the wire wheel 410, thereby realizing the movement of the moving part 810 and the second catheter 220 and releasing the function of the bracket 300.

[0088] It should be noted that, in the present embodiment, during the assembly process, one end of the traction guide wire 820 is wound around the inner side of the wire wheel 410 and is stretched and in a straightened and taut state. If the wire wheel 410 and the brake unit 510 are reversed, the traction guide wire 820 is relaxed to a loose state, and the traction guide wire 820 in a relaxed state is very easy to be separated from the outer side of the wire wheel 410. When the traction guide wire 820 is to be pulled closer again, there are risks of being separated from the preset track and interfering with components, so that the bracket 300 cannot be effectively released.

[0089] It is understandable that, referring to Figure 2 and Figure 7 In the embodiment of the present invention, an arc-shaped guide plate 150 is integrally formed and injection-molded in the housing assembly 100 to guide the pulling guide wire 820 to turn to the wire wheel 410 .

[0090] It is understandable that Figure 1 , Figure 6 , Fig. 9 and Fig.10 In some embodiments of the present invention, the housing assembly 100 is provided with an avoidance channel 120, the operating mechanism 400 is located in the housing assembly 100, and part of the structure of the operating mechanism 400 extends out of the housing assembly 100 through the avoidance channel 120; wherein, the housing assembly 100 is also provided with an anti-trigger structure 700, and the anti-trigger structure 700 can cover or avoid the operating mechanism 400. Through the above structure, the anti-trigger structure 700 is covered on the operating mechanism 400 during packaging, transportation, storage, etc., to prevent the operating mechanism 400 from being triggered and rotating, so as to facilitate the use effect of the operating mechanism 400 to be in the best state. During surgery, the operator needs to move the anti-trigger structure 700 to avoid the operating mechanism 400, so that the operator can rotate the operating mechanism 400 to complete the release of the stent 300 by the stent 300 delivery device.

[0091] Specifically, Figure 1 , Figure 6 , Fig. 9 and Fig.10In the embodiment of the present invention, the anti-trigger structure 700 includes two mounting members 710, a cover body 720 and two pressing members 730. The two mounting members 710 are respectively arranged on opposite sides of the shell assembly 100, and the mounting members 710 are detachably connected to the shell assembly 100; the cover body 720 covers the operating area of ​​the operating mechanism 400 located outside the shell assembly 100, and the opposite sides of the cover body 720 are fixedly connected to the two mounting members 710 in a one-to-one correspondence, wherein the two mounting members 710 are both connected to pressing members 730, and when the two pressing members 730 move toward each other, the two mounting members 710 are disconnected from the shell assembly 100. With the above structure, the housing assembly 100 can be detachably connected through the mounting member 710, which can be easily repaired and replaced; the cover body 720 covers the operating mechanism 400 and is located in the external operating area of ​​the housing assembly 100. The opposite sides of the cover body 720 are fixedly connected with the two mounting members 710 in a one-to-one correspondence, so that the cover body 720 is firmly fixed on the housing assembly 100; by pressing the pressing member 730, the two mounting members 710 are driven to be disconnected from the housing assembly 100. The structure is simple and the operation is convenient. Therefore, the above anti-trigger structure 7 00 makes the stent 300 delivery device have the technical characteristics of high safety protection factor, convenient and comfortable use, and can prevent the triggering of the movement of the operating mechanism during packaging, transportation, storage, etc., which may cause the stent 300 in the catheter mechanism 200 to shift, release in advance, etc.; the structure is simple and lightweight, and can be installed and removed by pressing, which can cope with complex environments during clinical use. For example, during use, the anti-trigger structure 700 will inevitably come into contact with liquids such as blood and saline. If pulling or pulling is used, there will be risks of slipping and collision at the contact part.

[0092] It should be noted that, in the embodiment of the present invention, the above-mentioned mounting member 710, cover body 720 and pressing member 730 are all integrally injection molded. Of course, in some embodiments, the above-mentioned mounting member 710, cover body 720 and pressing member 730 can be detachably connected by means of screws, clamping, etc. Of course, in some embodiments, the anti-trigger structure 700 is not limited to being installed on the housing assembly 100 in the above-mentioned detachable connection manner. The anti-trigger structure 700 can also be movably arranged on the housing assembly 100, such as a rotation connection or a movable connection; in the embodiment of the present invention, the above-mentioned cover body 720 is an arc-shaped shell cover, which can cover the operating mechanism 400 to prevent the operating mechanism 400 from being triggered to move during packaging, transportation, storage, etc., resulting in displacement of the bracket 300 in the catheter mechanism 200, premature release, etc.

[0093] Specifically, refer to Figure 6 , Fig. 9 and Fig.10In the embodiment of the present invention, the mounting member 710 is provided with a plugging protrusion 711, and the housing assembly 100 is provided with a plugging recess 130. The plugging protrusion 711 is plugged with the plugging recess 130, and the structure is simple and the assembly is convenient. It should be noted that the above-mentioned plugging recess 130 can be a groove structure or a channel structure. Of course, in some embodiments, the mounting member 710 can be provided with a plugging recess 130, and the housing assembly 100 can be provided with a plugging protrusion 711.

[0094] It should be noted that the side of the pressing member 730 is provided with anti-slip grooves to facilitate the operation of the operator.

[0095] Specifically, refer to Figure 1 , Figure 6 and Fig.10 In this embodiment, the housing assembly 100 includes a first housing 160 and a second housing 170, and the first housing 160 and the second housing 170 are detachably connected, specifically, they can be detachably connected by means of screws, snap connections, etc., wherein the first fixing member 521 and the second fixing member 522 are both integrally injection molded with the first housing 160. Of course, the first fixing member 521 can also be injection molded with the first housing 160, and the second fixing member 522 can also be injection molded with the second housing 170, which is not limited here. It can be understood that in the embodiment of the present invention, the first housing 160 and the second housing 170 are formed with a first protrusion 180 and a second protrusion 190, the first protrusion 180 and the second protrusion 190 are arranged at intervals, and the first protrusion 180 is provided with an inwardly concave arc-shaped recess 181, and the first protrusion 180 and the second protrusion 190 cooperate to facilitate the operator to hold.

[0096] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A delivery device for delivering a self-expanding stent, characterized in that: include: A housing assembly (100); A catheter mechanism (200), the catheter mechanism (200) being arranged on the housing assembly (100), and the catheter mechanism (200) being used to carry and release the stent (300); an operating mechanism (400), the operating mechanism (400) being rotatably disposed on the housing assembly (100), the operating mechanism (400) being transmission-connected to the catheter mechanism (200), and the operating mechanism (400) driving the catheter mechanism (200) to move so as to release the stent (300); A braking mechanism, the braking mechanism comprising a braking unit (510) and an orientation unit (520), the braking unit (510) being rotatably disposed on the housing assembly (100), the orientation unit (520) being fixedly disposed on the housing assembly (100), the braking unit (510) being transmission-connected to the operating mechanism (400), the braking unit (510) being provided with a plurality of braking parts (511), a braking gap (5111) being formed between two adjacent braking parts (511), and the orientation unit (520) cooperating with the braking gap (5111) to limit the rotation direction of the braking unit (510); Wherein, the plurality of braking parts (511) are arranged in a ring shape on the outer peripheral wall of the braking unit (510); The braking portion (511) is a convex tooth provided on the braking unit (510), the braking gap (5111) is a tooth groove formed between two adjacent convex teeth, and the orientation unit (520) is engaged with the tooth groove; The orientation unit (520) comprises: A first fixing member (521), the first fixing member (521) is located inside the housing assembly (100), and the first fixing member (521) is fixedly connected to the housing assembly (100); a second fixing member (522), the second fixing member (522) being located inside the housing assembly (100), the second fixing member (522) being fixedly connected to the housing assembly (100), and a clamping channel (523) being formed between the first fixing member (521) and the second fixing member (522); a brake member (524), the brake member (524) comprising a fixed section and a swing section, the fixed section being clamped in the clamping channel (523), the swing section extending out of the clamping channel (523), the swing section being swingable relative to the second fixed member (522), and the swing section being matched with the brake gap (5111); A stopper is protruding from the first fixing member (521), and the orthographic projections of the stopper and the second fixing member (522) are misaligned. The stopper abuts against the swing section to limit the swing section from swinging toward the first fixing member (521).

2. The delivery device for delivering a self-expanding stent according to claim 1, characterized in that: The housing assembly (100) is provided with a mounting shaft (110), and the brake unit (510) comprises: A connecting column (512), wherein the connecting column (512) is provided with a mounting channel, the mounting shaft (110) is plugged into and rotationally matched with the mounting channel, and the connecting column (512) and the operating mechanism (400) are mutually nested and relatively fixed; A truncated cone (513), wherein the truncated cone (513) is connected to the connecting column (512), the truncated cone (513) is arranged around the mounting channel of the connecting column (512), a plurality of braking portions (511) are connected to the truncated cone (513), and the plurality of braking portions (511) are evenly distributed along the outer peripheral wall of the truncated cone (513).

3. The delivery device for delivering a self-expanding stent according to claim 2, characterized in that: The connecting column (512) is provided with a first positioning structure (610), and the operating mechanism (400) is provided with a second positioning structure (620), and the first positioning structure (610) and the second positioning structure (620) are snap-fitted to relatively fix the connecting column (512) and the truncated table (513).

4. The delivery device for delivering a self-expanding stent according to claim 3, characterized in that: One of the first positioning structure (610) and the second positioning structure (620) is a positioning protrusion, and the other of the first positioning structure (610) and the second positioning structure (620) is a positioning groove, and the positioning protrusion is snap-fitted with the positioning groove.

5. The delivery device for delivering a self-expanding stent according to claim 1, characterized in that: The housing assembly (100) is provided with an avoidance channel (120), the operating mechanism (400) is located inside the housing assembly (100), and a portion of the structure of the operating mechanism (400) extends outside the housing assembly (100) through the avoidance channel (120); Wherein, the housing assembly (100) is also provided with an anti-trigger structure (700), and the anti-trigger structure (700) can cover or avoid the operating mechanism (400).

6. The delivery device for delivering a self-expanding stent according to claim 5, characterized in that: The anti-trigger structure (700) comprises: Two mounting members (710), the two mounting members (710) being respectively arranged on opposite sides of the housing assembly (100), the mounting members (710) being detachably connected to the housing assembly (100); a cover body (720), the cover body (720) covering an operating area on the operating mechanism (400) located outside the housing assembly (100), and opposite sides of the cover body (720) being fixedly connected to the two mounting members (710) in a one-to-one correspondence. Wherein, the two mounting members (710) are both connected to a pressing member (730), and when the two pressing members (730) move towards each other, the two mounting members (710) are disconnected from the housing assembly (100).

7. The delivery device for delivering a self-expanding stent according to claim 6, characterized in that: One of the mounting member (710) and the housing assembly (100) is provided with a plug-in protrusion (711), and the other of the mounting member (710) and the housing assembly (100) is provided with a plug-in recess (130), and the plug-in protrusion (711) is plug-fitted with the plug-in recess (130).

8. The delivery device for delivering a self-expanding stent according to claim 1, characterized in that: The operating mechanism (400) is transmission-connected to the catheter mechanism (200) via a transmission assembly; The catheter mechanism (200) comprises: A first catheter (210), wherein the distal end of the first catheter (210) is used to fit the bracket (300), and the proximal end of the first catheter (210) is used to be fixed in the housing assembly (100); a second catheter (220), wherein the second catheter (220) is sleeved on the first catheter (210), the distal end of the second catheter (220) is used to cover the stent (300), the proximal end of the second catheter (220) is inserted into the housing assembly (100), and the distal end of the second catheter (220) has a diameter-reducing section; a first track tube (230), wherein a proximal end of the first track tube (230) is disposed in the housing assembly (100), a distal end of the first track tube (230) is located between the first conduit (210) and the second conduit (220), and the second conduit (220) is movable relative to the first track tube (230); A second track tube (240), the proximal end of the second track tube (240) being disposed in the housing assembly (100); an intermediate tube (250), the intermediate tube (250) being arranged between the first conduit (210) and the second conduit (220), the proximal end of the intermediate tube (250) being inserted into the housing assembly (100), and the distal end of the intermediate tube (250) being in contact with the bracket (300) so as to limit the movement of the bracket (300) relative to the first conduit (210); A protective tube (260), wherein the protective tube (260) is fixedly inserted into the second track tube (240), and the protective tube (260) is sleeved outside the second guide tube (220); The transmission assembly comprises a moving member (810) and a traction guide wire (820), wherein the moving member (810) is movably disposed in the second track tube (240), the moving member (810) is fixedly connected to the second guide tube (220), the moving member (810) is movable relative to the first track tube (230), the distal end of the first track tube (230) is inserted into the second track tube (240) and the moving member (810), one end of the traction guide wire (820) is connected to the operating mechanism (400) and can be wound together, and the other end of the traction guide wire (820) extends into the second track tube (240) and is connected to the moving member (810); The first catheter (210) passes through the second track tube (240) and the moving part (810); the proximal end of the protective tube (260) is relatively fixed to the distal end of the second track tube (240); a fitting spacing is provided between the distal end of the protective tube (260) and the distal end of the second catheter (220); the fitting spacing is greater than twice the length of the corresponding reducing section on the second catheter (220); the diameter of the protective tube (260) is smaller than the diameter of the distal end region of the second catheter (220) corresponding to the reducing section; and the diameter of the protective tube (260) is greater than the diameter of the proximal end region of the second catheter (220) away from the reducing section.

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