Balloon restraint structure and balloon system

Abstract

The utility model relates to a balloon restraint structure and a balloon system.The restraint body comprises a plurality of radial restraint parts and a plurality of axial restraint parts which are connected, the radial restraint parts are annular elements, the axial restraint parts are linear elements, and the radial restraint parts are distributed in the axial direction of the restraint body; the radial restraining pieces are distributed in the radial direction of the restraining body, the axial restraining pieces are distributed in the circumferential direction of the restraining body, at least one part of at least one of the radial restraining pieces and the axial restraining pieces is arranged to be in a parabola shape in the contraction state of the restraining body, and at least one axial end of the restraining body is provided with a connecting element. The design of parabola shapes in the radial restraining part and the axial restraining part can obviously disperse strain and stress of the balloon restraining structure, the balloon has better flexibility in the pushing process, the pushing performance of the balloon is improved, when the balloon is full, the pressure resistance of the balloon restraining structure is higher, the balloon restraining structure has higher filling stability, and when the balloon is withdrawn, the balloon restraining structure is not prone to deformation. The balloon is easier to withdraw due to the retraction property improved by the balloon restraint structure.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to balloon restraint structures and balloon systems. Background Technology

[0002] Atherosclerotic cardiovascular disease seriously threatens human life and health, with a rapidly increasing number of deaths. Interventional therapy, with its advantages of minimal invasiveness, rapid effectiveness, fewer complications, and quick postoperative recovery, is an important treatment method for vascular diseases. Balloon angioplasty is one of the most commonly used interventional techniques. However, ordinary balloon dilation catheters expand unevenly during vessel dilation, posing risks of vascular dissection and perforation. Specialized balloons, with their superior capabilities, are gradually providing a better option for more patients with vascular stenosis. Cutting and scoring specialized balloons, by attaching metal or other material cutting and scoring elements to the working surface of ordinary balloons, better focus the balloon inflation pressure, addressing the problem of high resistance in lesions. However, this design philosophy is not to avoid damage to the vessel wall altogether, but rather to reduce damage to the vessel wall by creating predictable trauma.

[0003] Balloons with restraint structures provide uniform inflation by creating constraints in both the axial and radial directions. This forms a channel between the balloon's occipital portion, which makes gentle contact with the vessel wall, and a strain-reducing groove in the vessel wall, minimizing vessel displacement and reducing radial forces during balloon inflation, thereby reducing vascular dissection and perforation rates. However, current balloon restraint structures still have some shortcomings that need optimization. In practical applications, it has been found that during balloon advancement, inflation, or withdrawal, the restraint structure may experience insufficient pressure resistance, breakage, insufficient retraction, insufficient flexibility, or torsion, potentially causing serious harm to the patient during these processes. Utility Model Content

[0004] Therefore, it is necessary to provide a balloon restraint structure and balloon system to address the aforementioned technical problems.

[0005] This application provides a balloon restraint structure, the balloon restraint structure comprising:

[0006] The constraint body has a contracted state under no force and an expanded state under force. The constraint body includes several connected radial constraint members and several axial constraint members. The radial constraint members are annular elements with deformation function, and the axial constraint members are linear elements with deformation function. The radial constraint members are distributed along the axial direction of the constraint body, and the axial constraint members are distributed along the circumferential direction of the constraint body. In the contracted state of the constraint body, at least a portion of the structure of at least one of the radial constraint members and the axial constraint members is configured as a parabolic shape.

[0007] A connecting element, wherein the number of the connecting elements is configured to be at least one, and the connecting element is disposed at at least one axial end of the constraint body.

[0008] In one embodiment, the radial constraint includes a plurality of first curve segments and a plurality of first connecting segments, wherein the first curve segments that are adjacent in the circumferential direction in the radial constraint are connected by the first connecting segments, wherein the first curve segments are parabolic in the contracted state of the constraint body.

[0009] In one embodiment, the first curved segment is connected to the axial constraint member, and the first curved segment has a plurality of first tangents, wherein the first tangents passing through the connection point between the first curved segment and the axial constraint member are radially parallel to the constraint body; and / or,

[0010] The first curved segment has an opening, and the openings of adjacent circumferential segments in the radial constraint member are oriented in opposite directions; and / or,

[0011] The parabolic shape of the first curve segment satisfies the formula y 2 =2px, where p is 10 -2 -10 4 ; and / or,

[0012] The first connecting segment is a straight line in the contracted state of the constraint body, and the first connecting segment is tangent to the first curved segment.

[0013] In one embodiment, the axial constraint includes a second curved segment and a second connecting segment, wherein the second curved segment is connected to the second connecting segment, and the second curved segment is parabolic in the contracted state of the constraint body.

[0014] In one embodiment, the second curve segment is connected to the radial constraint member, and the second curve segment has a plurality of second tangents, wherein the second tangents passing through the connection point between the second curve segment and the radial constraint member are parallel to the axial direction of the constraint body; and / or,

[0015] The parabolic shape of the second curve segment satisfies the formula y 2 =2px, where p is 10 -2 -10 4 ; and / or,

[0016] The second connecting segment is a straight line in the contracted state of the constrained body, and the second connecting segment is tangent to the second curved segment.

[0017] In one embodiment, the axially adjacent radial constraint members in the constraint body are staggered in the circumferential direction of the constraint body. The axial constraint member includes two second curve segments and two second connecting segments, which are arranged alternately. Each axial constraint member connects to three axially adjacent radial constraint members in the constraint body. The second curve segment is connected to the outer side of the first curve segment, and the second connecting segment is connected to the inner side of the first curve segment.

[0018] In one embodiment, the circumferentially adjacent axial constraint members in the constraint body are staggered in the axial direction of the constraint body; and / or,

[0019] The axially adjacent members in the circumferential direction of the constraint body are oriented in opposite directions along the axial direction of the constraint body.

[0020] In one embodiment, a plurality of radial constraint members are arranged parallel to each other along the axial direction of the constraint body. Each axial constraint member includes a second curved segment and a second connecting segment. The second curved segment and the second connecting segment are connected end to end. Each axial constraint member connects two axially adjacent radial constraint members in the constraint body. The second curved segment is connected to the inner side of the first curved segment, and the second connecting segment is connected to the outer side of the first curved segment.

[0021] In one embodiment, the axially adjacent members in the circumferential direction of the constraint body are staggered in the axial direction of the constraint body.

[0022] This application provides a balloon system including the balloon constraint structure.

[0023] In the aforementioned balloon restraint structure and balloon system, the parabolic shape design of the radial and axial restraint components can significantly disperse the strain and stress of the balloon restraint structure, resulting in better compliance of the balloon during delivery and improved delivery performance. When the balloon is inflated, the pressure resistance of the balloon restraint structure is stronger, and it has higher inflation stability. When the balloon is withdrawn, the improved retraction of the balloon restraint structure makes it easier for the balloon to withdraw. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the balloon restraint structure provided in one embodiment of this application.

[0025] Figure 2 For example Figure 1 The diagram shows the radial constraint component of the balloon constraint structure.

[0026] Figure 3 For example Figure 1 The diagram shows the axial constraint component of the balloon constraint structure.

[0027] Figure 4 This is a schematic diagram of a balloon restraint structure provided in another embodiment of this application.

[0028] Figure 5 For example Figure 4 The diagram shows the radial constraint component of the balloon constraint structure.

[0029] Figure 6 For example Figure 4 The diagram shows the axial constraint component of the balloon constraint structure.

[0030] Figure Number:

[0031] 1000, Constraint body; 2000, Connecting element;

[0032] 1100, radial constraint; 1200, axial constraint; 1300, parabolic shape;

[0033] 1110, First curve segment; 1120, First connecting segment;

[0034] 1210, Second curve segment; 1220, Second connecting segment;

[0035] 2100, Fixed section; 2200, Transition section. Detailed Implementation

[0036] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0037] In the description of this application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0038] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0039] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0040] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0041] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0042] This application provides a balloon constraint structure for mounting on the outside of a balloon, which provides the intended constraint on the balloon's expansion during the balloon's inflation process, resulting in a uniform inflation effect under the constraint.

[0043] See Figures 1 to 6As shown, the above-mentioned balloon restraint structure includes a restraint body 1000 and a connecting element 2000. The restraint body 1000 has a contracted state under no force and an expanded state under force. The contracted state is when the restraint body 1000 has a small volume. In this contracted state, the restraint body 1000 is not subjected to any force, so it is the small volume shape that the restraint body 1000 can maintain under normal conditions. For example, at this time, the restraint body 1000 presents a small-volume cylindrical structure, which is adapted to the delivery system and the target blood vessel being delivered.

[0044] The deformation capability of the constraint body 1000, which can switch between a contracted state and an expanded state, can be formed based on various design factors such as material design and structural design. For example, the constraint body 1000 is made of an elastic material, so that the constraint body 1000 has good deformation capability due to the elastic function of the elastic material. Elastic materials can be selected such as nickel-titanium alloy, silicone rubber and polyurethane. Those skilled in the art can select a suitable elastic material according to actual needs, and no limitation is made here.

[0045] In terms of structural design, the constraint body 1000 includes several connected radial constraint members 1100 and several axial constraint members 1200. The radial constraint members 1100 are annular elements with deformation function, and the axial constraint members 1200 are linear elements with deformation function. This deformation capability can be formed based on the design of the aforementioned elastic material. When the constraint body 1000 is in a contracted state and presents a cylindrical structure, the constraint body 1000 has radial and axial aspects, the radial aspect being... Figure 1 The vertical direction shown is the axial direction. Figure 1 As shown in the left and right directions, the axial length of the constraint body 1000 can be set to 2mm-10mm.

[0046] Therefore, a number of radial constraint members 1100 can be distributed along the axial direction of the constraint body 1000. Based on the annular design of the radial constraint members 1100, when the radial constraint members 1100 are distributed along the axial direction, a cylindrical structure of the constraint body 1000 can be constructed. For example, when the radial constraint members 1100 are circular, the constraint body 1000 is a cylindrical structure. When the radial constraint members 1100 are annular in other shapes, the constraint body 1000 can be constructed into a cylindrical structure of other shapes accordingly, which is not limited here.

[0047] The constraint body 1000 is a cylindrical structure built based on several radial constraint members 1100. Several axial constraint members 1200 are distributed along the circumference of the constraint body 1000, so that the several axial constraint members 1200 are connected to the several radial constraint members 1100 in a suitable layout, thereby forming a complete constraint body 1000.

[0048] The number of connecting elements 2000 is configured to be at least one, and a connecting element 2000 is provided at least one axial end of the constraint body 1000, for example, such as Figure 1 As shown, the restraint body 1000 has connecting elements 2000 at both axial ends. The connecting elements 2000 function to connect the balloon. When the balloon restraint structure is assembled on the outside of the balloon, the restraint body 1000 can be fitted onto the outside of the balloon and fit tightly against it to restrain the balloon's expansion. The connecting elements 2000 can be fixed to both ends of the balloon by heat fusion or adhesive, thereby fixing the restraint body 1000 to the outside of the balloon.

[0049] like Figure 1 As shown, the connecting element 2000 may include a fixed section 2100 and a transition section 2200. The fixed section 2100 can be connected to the axial end of the constraint body 1000 via the transition section 2200, thereby forming a complete balloon constraint structure after the connecting element 2000 and the constraint body 1000 are connected. The transition section 2200 can be as follows: Figure 1 The structure shown is configured with several rod-shaped or filamentous structures. The number of transition segments 2200 can be set to 2 to 6, the length of each transition segment 2200 can be set to 2mm-10mm, and the distance between adjacent transition segments 2200 can be set to 1mm-10mm. The fixing segment 2100 can be configured according to the connection requirements with the balloon, such as... Figure 1 The mesh structure shown or other suitable structures can be used. Those skilled in the art can set the shape of the connecting element 2000 according to actual needs, and no limitation is made here.

[0050] After the aforementioned balloon restraint structure is assembled onto the balloon, the diameter of the inflated balloon will gradually increase. As the balloon inflates, its expansion exerts a force on the balloon restraint structure, causing the restraint body 1000 to transition from a contracted state to an inflated state under stress. This transition process causes deformation of the radial restraint member 1100 and the axial restraint member 1200 of the restraint body 1000. The radial restraint member 1100... Figure 1 The wave-shaped ring shown is straightened into a circular ring with a diameter smaller than the free inflation diameter of the balloon, and the axial constraint 1200 is also further straightened and elongated as the balloon inflates.

[0051] At this time, due to the constraints of the radial constraint member 1100 and the axial constraint member 1200 of the constraint body 1000, several groove structures will be formed on the outer surface of the balloon. When the balloon retracts, the balloon constraint structure returns to the contracted state due to the disappearance of the force it bears, and the diameter decreases.

[0052] When the constraint body 1000 is subjected to the above-mentioned force, during the transition from a contracted state to an expanded state, the deformation of the radial constraint member 1100 and the axial constraint member 1200 plays a crucial role in the constraint of the balloon, affecting the uniformity of the balloon's expansion after inflation. Therefore, the radial constraint member 1100 and the axial constraint member 1200 in this application are designed such that, in the contracted state of the constraint body 1000, at least a portion of the structure of the radial constraint member 1100 or the axial constraint member 1200 is set as a parabolic shape 1300, or, for example, as shown in 1, at least a portion of the structure of both the radial constraint member 1100 and the axial constraint member 1200 is set as a parabolic shape 1300, and the parabolic shape 1300 includes a parabola and its body of revolution.

[0053] The parabolic shape 1300 described above can satisfy y 2 =2px, where p is 10 -2 -10 4 The parabolic shape 1300 significantly disperses the strain and stress of the balloon restraint structure, reducing its movement and displacement during balloon inflation. Therefore, when the radial restraint 1100 and axial restraint 1200 deform, they can improve or resolve issues such as insufficient compliance, insufficient pressure resistance during inflation leading to fracture, and insufficient balloon retraction during balloon insertion. Thus, the balloon restraint structure provided in this application enables better compliance during balloon insertion, improving balloon delivery performance. During balloon inflation, the restraint structure exhibits stronger pressure resistance and higher inflation stability. During balloon retraction, the improved retraction of the restraint structure makes balloon retraction easier.

[0054] like Figures 1 to 6 As shown, in one embodiment, the radial constraint 1100 includes a plurality of first curved segments 1110 and a plurality of first connecting segments 1120. Adjacent first curved segments 1110 in the circumferential direction are connected by the first connecting segments 1120, thereby forming an annular radial constraint 1100 through the intervals between the plurality of first curved segments 1110 and the plurality of first connecting segments 1120. The first curved segments 1110 are designed to present a parabolic shape 1300 in the contracted state of the constraint body 1000, satisfying y 2 =2px, where p is 10 -2 -10 4 The first curve segment 1110 is used to connect with the axial constraint member 1200. At this time, the first curve segment 1110 is defined by a number of first tangents. When the first curve segment 1110 is connected with the axial constraint member 1200, the first tangents passing through the connection position of the first curve segment 1110 and the axial constraint member 1200 are parallel to the radial direction of the constraint body 1000.

[0055] The first curve segment 1110, which presents a parabolic shape 1300, can have the following characteristics: Figure 2 The openings shown are oriented in opposite directions to the openings of adjacent first curved segments 1110 in the radial constraint member 1100, for example... Figure 2 The upper first curved segment 1110 has an opening facing to the left, and the lower first curved segment 1110 has an opening facing to the right. The first connecting segment 1120 can be in a straight line shape when the constraint body 1000 is in a contracted state. When the first connecting segment 1120 is connected to the first curved segment 1110, the first connecting segment 1120 and the first curved segment 1110 are tangent at the connection position.

[0056] The length of the first curved segment 1110 can be set to 0.2mm-2mm, the length of the first connecting segment 1120 can be set to 1mm-3mm, and the width of the first curved segment 1110 and the first connecting segment 1120 can be set to 0.05mm-0.2mm. The overall length of the axial constraint member 1200 formed by the first curved segment 1110 and the first connecting segment 1120 can be set to 1mm-5mm, and the overall width can be set to 1mm-10mm. The axially adjacent radial constraint members 1100 can be spaced 0.1mm-2mm apart.

[0057] like Figures 1 to 6 As shown, in one embodiment, the axial constraint 1200 includes a second curved segment 1210 and a second connecting segment 1220. The second curved segment 1210 is connected to the second connecting segment 1220, thereby forming a linear radial constraint 1100 through the end-to-end connection of the second curved segment 1210 and the second connecting segment 1220. The second curved segment 1210 is designed to have a parabolic shape 1300 in the contracted state of the constraint body 1000, satisfying y... 2 =2px, where p is 10 -2 -10 4 The second curved segment 1210 is used to connect with the radial constraint member 1100. The second curved segment 1210 has numerous second tangents. When the second curved segment 1210 is connected to the radial constraint member 1100, the second tangents passing through the connection point between the second curved segment 1210 and the radial constraint member 1100 are parallel to the axial direction of the constraint body 1000. The second connecting segment 1220 can be straight in the contracted state of the constraint body 1000. When the second connecting segment 1220 is connected to the second curved segment 1210, the second connecting segment 1220 and the second curved segment 1210 are tangent at the connection point.

[0058] The length of the second curved segment 1210 can be set to 0.1mm-1mm, the length of the second connecting segment 1220 can be set to 1mm-3mm, and the width of the second curved segment 1210 and the second connecting segment 1220 can be set to 0.05mm-0.2mm. The overall length of the axial constraint member 1200 formed by the second curved segment 1210 and the second connecting segment 1220 can be set to 1mm-5mm, and the overall width can be set to 1mm-3mm. A rounded corner structure can also be provided at the connection between the second curved segment 1210 and the second connecting segment 1220, and the diameter of the rounded corner structure can be set to 0.1mm-1mm.

[0059] In one embodiment, such as Figure 1 As shown, the axially adjacent radial constraint members 1100 in the constraint body 1000 are staggered in the circumferential direction of the constraint body 1000, for example... Figure 1 In the axial direction of the constraint body 1000, the openings of the two connected radial constraint members 1100, the first connecting segment 1120, and the first curved segment 1110 do not correspond axially. The axial constraint member 1200 may include two second curved segments 1210 and two second connecting segments 1220, with the second curved segments 1210 and the second connecting segments 1220 arranged alternately to form a configuration as shown in the figure. Figure 3 The axial constraint component 1200 is shown.

[0060] In the constraint body 1000, each axial constraint member 1200 can be connected to three axially adjacent radial constraint members 1100 in the constraint body 1000, for example... Figure 1 In the middle, the second curved segment 1210 at the end is connected to the radial constraint member 1100, and the second connecting segment 1220 at the end is connected to another radial constraint member 1100. The first curved segment 1110 and the second connecting segment 1220 in the middle are simultaneously connected to the radial constraint member 1100 in the middle. The second curved segment 1210 is connected to the outer side of the first curved segment 1110, and the second connecting segment 1220 is connected to the inner side of the first curved segment 1110.

[0061] Based on the staggered distribution of several radial constraint members 1100 in the constraint body 1000, in one embodiment, the circumferentially adjacent axial constraint members 1200 in the constraint body 1000 are staggered in the axial direction of the constraint body 1000, and the circumferentially adjacent axial constraint members 1200 in the constraint body 1000 face opposite directions along the axial direction of the constraint body 1000.

[0062] In one embodiment, such as Figure 4 As shown, several radial constraint members 1100 are arranged parallel to each other along the axial direction of the constraint body 1000. Parallel arrangement means, for example... Figure 4As shown, after moving along the axial direction, the radial constraint members 1100 in the constraint body 1000 can all coincide with other radial constraint members 1100, that is, all radial constraint members 1100 are not misaligned in the circumferential direction, which is consistent with... Figure 1 In contrast to the distribution methods shown in the above embodiments, in Figure 4 In the axial direction of the constraint body 1000, the openings of two adjacent radial constraint members 1100, the first connecting segment 1120, and the first curved segment 1110 are all axially corresponding.

[0063] When several radial constraint members 1100 are as follows Figure 4 When the balloon is set up in parallel as shown, the problem of unexpected torsion of the balloon constraint structure during balloon push and inflation can be significantly reduced, thus reducing additional harm to the patient.

[0064] The axial constraint member 1200 may include a second curved segment 1210 and a second connecting segment 1220, forming as follows: Figure 6 The axial constraint member 1200 is shown. The second curved segment 1210 and the second connecting segment 1220 are connected end-to-end. Each axial constraint member 1200 connects to two axially adjacent radial constraint members 1100 in the constraint body 1000. The second curved segment 1210 is connected to the inner side of the first curved segment 1110, and the second connecting segment 1220 is connected to the outer side of the first curved segment 1110. Based on the parallel distribution of several radial constraint members 1100 in the constraint body 1000, in one embodiment, circumferentially adjacent axial constraint members 1200 in the constraint body 1000 are staggered in the axial direction of the constraint body 1000.

[0065] This application provides a balloon system, which includes a balloon restraint structure. Since the specific structure, functional principle, and technical effects of the balloon restraint structure have been described in detail above, they will not be repeated here. Any technical details regarding the balloon restraint structure can be found in the foregoing description. The balloon system may also include a balloon, a delivery device, etc. Those skilled in the art can configure the contents of the balloon system according to their needs, and no limitations are imposed here.

[0066] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0067] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A balloon-constrained structure, characterized in that, The balloon restraint structure includes: The constraint body has a contracted state under no force and an expanded state under force. The constraint body includes several connected radial constraint members and several axial constraint members. The radial constraint members are annular elements with deformation function, and the axial constraint members are linear elements with deformation function. The radial constraint members are distributed along the axial direction of the constraint body, and the axial constraint members are distributed along the circumferential direction of the constraint body. In the contracted state of the constraint body, at least a portion of the structure of at least one of the radial constraint members and the axial constraint members is configured as a parabolic shape. A connecting element, wherein the number of the connecting elements is configured to be at least one, and the connecting element is disposed at at least one axial end of the constraint body.

2. The balloon restraint structure according to claim 1, characterized in that, The radial constraint member includes a plurality of first curve segments and a plurality of first connecting segments. The first curve segments that are adjacent in the circumferential direction in the radial constraint member are connected by the first connecting segments. The first curve segments are parabolic in the contracted state of the constraint body.

3. The balloon restraint structure according to claim 2, characterized in that, The first curved segment is connected to the axial constraint member, and the first curved segment has a plurality of first tangents, wherein the first tangent passing through the connection point between the first curved segment and the axial constraint member is parallel to the radial direction of the constraint body; and / or, The first curved segment has an opening, and the openings of adjacent circumferential segments in the radial constraint member are oriented in opposite directions; and / or, The parabolic shape of the first curve segment satisfies the formula y 2 =2px, where p is 10 -2 -10 4 ; and / or, The first connecting segment is a straight line in the contracted state of the constraint body, and the first connecting segment is tangent to the first curved segment.

4. The balloon constraint structure according to claim 2, characterized in that, The axial constraint member includes a second curved segment and a second connecting segment, wherein the second curved segment is connected to the second connecting segment, and the second curved segment is parabolic in the contracted state of the constraint body.

5. The balloon restraint structure according to claim 4, characterized in that, The second curved segment is connected to the radial constraint member, and the second curved segment has a plurality of second tangents, wherein the second tangents passing through the connection point between the second curved segment and the radial constraint member are parallel to the axial direction of the constraint body; and / or, The parabolic shape of the second curve segment satisfies the formula y 2 =2px, where p is 10 -2 -10 4 ; and / or, The second connecting segment is a straight line in the contracted state of the constrained body, and the second connecting segment is tangent to the second curved segment.

6. The balloon restraint structure according to claim 5, characterized in that, The radial constraint members that are axially adjacent in the constraint body are staggered in the circumferential direction of the constraint body. The axial constraint member includes two second curve segments and two second connecting segments. The second curve segments and the second connecting segments are arranged alternately. Each axial constraint member is connected to three radial constraint members that are axially adjacent in the constraint body. The second curve segment is connected to the outer side of the first curve segment, and the second connecting segment is connected to the inner side of the first curve segment.

7. The balloon restraint structure according to claim 6, characterized in that, The axial constraint members that are circumferentially adjacent in the constraint body are staggered in the axial direction of the constraint body; and / or, The axially adjacent members in the circumferential direction of the constraint body are oriented in opposite directions along the axial direction of the constraint body.

8. The balloon restraint structure according to claim 5, characterized in that, The radial constraint members are arranged parallel to each other along the axial direction of the constraint body. Each axial constraint member includes a second curved segment and a second connecting segment. The second curved segment and the second connecting segment are connected end to end. Each axial constraint member connects two axially adjacent radial constraint members in the constraint body. The second curved segment is connected to the inner side of the first curved segment, and the second connecting segment is connected to the outer side of the first curved segment.

9. The balloon restraint structure according to claim 8, characterized in that, The axial constraint members that are adjacent in the circumferential direction in the constraint body are staggered in the axial direction of the constraint body.

10. A balloon system, characterized in that, The balloon system includes the balloon restraint structure as described in any one of claims 1-9.

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