Balloon release valve and intragastric balloon

Abstract

This invention provides a balloon release valve and an intragastric balloon, relating to the field of medical devices. The balloon release valve includes a valve body, a resilient closing valve element, and a biodegradable restraint element. The valve body includes a connecting arc surface for connecting to the balloon body and a release tube. The connecting arc surface has a release port in its center, and the release tube is located inside the arc surface of the connecting arc surface and communicates with the release port to form a fluid outlet channel. The biodegradable restraint element is fitted onto the resilient closing valve element, causing the resilient closing valve element to deform. The deformed resilient closing valve element and the biodegradable restraint element work together to compress the release tube outside, closing the fluid outlet channel. After the biodegradable restraint element degrades, the resilient closing valve element returns to its shape, and the fluid outlet channel opens. The valve body is made of an organic polymer membrane material. The intragastric balloon includes a balloon body and a balloon release valve installed on the balloon body. The release valve provided by this invention has the characteristics that the release time is not affected by the individual's physical condition and the release process is safe.

Description

Technical Field

[0001] This invention relates to the field of medical devices, and more specifically, to a balloon release valve and an intragastric balloon. Background Technology

[0002] It is well known that excessive obesity poses a threat to human health, and many diseases are caused by obesity. Gastric balloon weight loss involves placing a water-filled balloon in the stomach to occupy a certain amount of stomach space, thus restricting food intake and achieving weight loss. The release of the gastric balloon usually occurs through the rupture of the balloon wall, releasing the fluid inside. Currently known methods of release include using a biodegradable material for the balloon wall or using a specific section of the balloon wall with a biodegradable material, allowing the balloon to release after the material degrades. This method has the following problems: 1. Because the balloon wall is in direct contact with the stomach, the rate of degradation and release is affected by individual differences, meaning the degradation and release time may vary from person to person, making it impossible to predict the degradation time; 2. Only the degradation site forms a release channel, and degradation is a slow process, meaning the channel gradually enlarges. During degradation, food may block the channel if it is small, and if the blockage is prolonged and the food deteriorates, it is detrimental to health.

[0003] Therefore, this application is hereby submitted. Summary of the Invention

[0004] The present invention aims to, for example, provide a balloon release valve and an intragastric balloon to improve at least one of the problems mentioned in the background art.

[0005] The embodiments of the present invention can be implemented as follows:

[0006] In a first aspect, embodiments of the present invention provide a balloon release valve, which includes a valve body, an elastic closing valve element, and a biodegradable restraint element;

[0007] The valve body includes a connecting arc surface for connecting with the balloon body and a release tube. The middle part of the connecting arc surface has a release port, and the release tube is located inside the arc surface of the connecting arc surface and communicates with the release port to form a liquid outlet channel.

[0008] The biodegradable constraint is fitted onto the elastic closing valve, causing the elastic closing valve to deform. The deformed elastic closing valve and the biodegradable constraint work together to squeeze the release pipe outside, thus closing the liquid outlet channel. After the biodegradable constraint degrades, the elastic closing valve returns to its shape, and the liquid outlet channel opens.

[0009] The valve body is made of organic polymer membrane material.

[0010] In an optional embodiment, the biodegradable constraint is a ring-shaped component, and the elastic closing valve component includes a collar and multiple extrusion feet. The collar is sleeved outside the release tube, and one end of each extrusion foot is connected to the collar, while the other end is sleeved inside the ring-shaped component.

[0011] The annular component fits one end of each squeezing foot into it, causing the extension angle of the squeezing foot to change and squeeze the release tube, thus closing the liquid outlet channel; after the annular component degrades, the extension angle of the squeezing foot returns to normal, the squeezing effect on the release tube disappears, and the liquid outlet channel opens.

[0012] In an optional embodiment, each extrusion foot has a protrusion on the outer side of the end away from the annular part to prevent the annular part fitted on the extrusion foot from slipping off.

[0013] In an optional embodiment, the biodegradable restraint is a restraint sleeve, and the elastic closing valve includes a strip plate and two arc-shaped extrusion parts respectively connected to opposite ends of the strip plate, with the inner sides of the two arc-shaped extrusion parts arranged opposite to each other.

[0014] Position the release tube between the two arc-shaped extrusion sections, bend the opposite ends of the strip plate inward, so that the outer arcs of the two arc-shaped extrusion sections are close to the strip plate, until the release tube is pressed between the strip plate and the arc-shaped extrusion sections by the outer arcs of the two arc-shaped extrusion sections. The elastic closing valve completes its deformation. A restraining sleeve is then placed over the deformed elastic closing valve to restrain it, thereby closing the liquid outlet channel. After the restraining sleeve degrades, the elastic closing valve returns to its original shape, the extrusion effect on the release tube disappears, and the liquid outlet channel opens.

[0015] In an alternative implementation, the strip has a cutout portion.

[0016] In an optional embodiment, the biodegradable restraint is a restraint ring, and the elastic closing valve is a coiled structure, which includes a strip plate, two deformable arc plates respectively connected to opposite ends of the strip plate, and two arc-shaped abutment portions respectively connected to the two deformable arc plates and coiled inward.

[0017] Position the release tube on the back side of the strip plate, bend the two deformable arc plates in opposite directions, and rotate the two arc-shaped abutment parts until they squeeze the release tube against the strip plate. At this time, the two arc-shaped abutment parts are in a back-to-back state, and the elastic closing valve completes its deformation. Place the restraining ring on the inner side of the arc of the two arc-shaped abutment parts to restrain the elastic closing valve, thereby closing the liquid outlet channel. After the restraining ring degrades, the shape of the elastic closing valve returns to normal, the squeezing effect on the release tube disappears, and the liquid outlet channel opens.

[0018] In an optional embodiment, the valve body is made of polyurethane, silicone, polyethylene, or a composite material of at least two of the aforementioned materials.

[0019] In an optional implementation, the resilient closing valve is made of nickel-titanium metal.

[0020] In an optional embodiment, the biodegradable restraint is made of polylactic acid, polyglycolic acid, polyglycolic acid, polydioxanone, polycaprolactone, polytrimethylene carbonate, or a composite material of at least two of the aforementioned materials.

[0021] Secondly, embodiments of the present invention provide an intragastric balloon, which includes a balloon body with a one-way self-sealing inlet valve and a balloon release valve as described above. The balloon body has a release valve mounting port, and the connecting arc surface is connected to the balloon wall of the balloon body corresponding to the mounting port.

[0022] The beneficial effects of the embodiments of the present invention include, for example:

[0023] 1. After the balloon release valve is installed on the balloon body, the biodegradable restraint is located inside the balloon. After being implanted into the human stomach, it does not come into contact with gastric juice and is not affected by gastric peristalsis. Its degradation rate is only related to the physiological saline injected into the balloon. Therefore, the release time of the liquid in the balloon can be predicted and will not vary due to different physical conditions.

[0024] 2. Due to the elasticity of the valve component, the liquid outlet channel opens all at once after the biodegradable restraint component disintegrates, rather than opening slowly, thus avoiding the situation where the liquid outlet channel is blocked by chyme when it opens slowly. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 A schematic diagram of the balloon release valve provided in Example 1;

[0027] Figure 2 This is a schematic diagram of the elastic closing valve in Example 1 when it is not constrained.

[0028] Figure 3 This is a schematic diagram of the balloon release valve provided in Example 2;

[0029] Figure 4 This is a schematic diagram of the deformation process of the elastic closing valve in Example 2;

[0030] Figure 5 This is a schematic diagram of the biodegradable constraint component in Example 2;

[0031] Figure 6This is a schematic diagram of the balloon release valve provided in Example 3;

[0032] Figure 7 This is a schematic diagram of the deformation process of the elastic closing valve in Example 3;

[0033] Figure 8 A photograph of the stomach wall of a pig after the balloon release valve provided in Example 1 was made into a balloon, implanted into the pig's stomach, and expelled.

[0034] Figure 9 A photograph of the pig stomach wall after the balloon release valve provided in Example 2 was made into a balloon, implanted into the pig stomach, and expelled.

[0035] Figure 10 A photograph of the stomach wall of a pig after the balloon release valve provided in Example 3 was made into a balloon, implanted into the pig's stomach, and expelled.

[0036] Figure 11 A photograph of the intestinal wall of a pig after the balloon release valve provided in Example 1 was made into a balloon, implanted into the stomach of a pig, and expelled.

[0037] Figure 12 A photograph of the intestinal wall of a pig after the balloon release valve provided in Example 2 was made into a balloon, implanted into the pig's stomach, and expelled.

[0038] Figure 13 A photograph of the intestinal wall of a pig after the balloon release valve provided in Example 3 was made into a balloon, implanted into the stomach of a pig, and expelled.

[0039] Icons: 100-Balloon release valve; 101-Release port; 110-Valve body; 111-Connecting arc surface; 112-Release pipe; 120-Elastic closing valve; 121-Collar; 122-Extrusion foot; 123-Protrusion; 124-Strip plate; 125-Arc-shaped extrusion part; 126-Deformable arc plate; 127-Arc-shaped abutment part; 130-Degradable restraint component. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0041] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0042] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0043] In the description of this invention, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed, they are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0044] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0045] It should be noted that, where there is no conflict, the features in the embodiments of the present invention can be combined with each other.

[0046] Example 1

[0047] Please refer to Figure 1 and 2 As shown, the present invention provides a balloon release valve 100, including a valve body 110, an elastic closing valve element 120, and a biodegradable restraint element 130;

[0048] The valve body 110 includes a connecting arc surface 111 for connecting with the balloon body and a release tube 112. The connecting arc surface 111 has a release port 101 in the middle. The release tube 112 is located inside the arc surface of the connecting arc surface 111 and communicates with the release port 101 to form a liquid outlet channel.

[0049] The biodegradable constraint 130 is fitted onto the elastic closing valve 120, causing the elastic closing valve 120 to deform. The deformed elastic closing valve 120 and the biodegradable constraint 130 work together to squeeze the release pipe 112 outside the release pipe 112, thus closing the liquid outlet channel. After the biodegradable constraint 130 degrades, the elastic closing valve 120 returns to its shape, and the liquid outlet channel opens.

[0050] The valve body 110 is made of organic polymer membrane material.

[0051] The balloon release valve 100 provided by this invention is used to connect with a balloon body to form a balloon implanted in the stomach. The release tube 112, biodegradable restraint element 130, and elastic closing valve element 120 are located inside the balloon body. After the intragastric balloon is implanted into the stomach, physiological saline is injected into the balloon through its self-sealing one-way valve. After a period of time, the biodegradable restraint element 130 is gradually degraded in the physiological saline. When the restraining force of the biodegradable restraint element 130 on the elastic closing valve element 120 is less than the rebound force of the elastic closing valve element 120 to restore its shape, the biodegradable restraint element 130 breaks open, the restraining effect on the elastic closing valve element 120 disappears, the elastic closing valve element 120 returns to its shape, the fluid outlet opens, and the liquid inside the balloon is discharged from the release port 101.

[0052] The balloon release valve 100 provided by the present invention has the following advantages:

[0053] 1. After the balloon release valve 100 is installed on the balloon body, the biodegradable restraint 130 is located inside the balloon. After being implanted into the human stomach, it does not come into contact with gastric juice and is not affected by gastric peristalsis. Its degradation rate is only related to the physiological saline injected into the balloon. Therefore, the release time of the liquid in the balloon can be predicted and will not vary due to different physical conditions.

[0054] 2. Due to the elasticity of the elastic closing valve 120, the liquid outlet channel will open all at once after the degradable constraint 130 disintegrates, instead of opening slowly, thus avoiding the situation where the liquid outlet channel is blocked by chyme when it opens slowly.

[0055] Optionally, the valve body 110 is made of polyurethane, silicone, polyethylene, or a composite material of at least two of the aforementioned materials. In this embodiment, polyurethane is selected as the material.

[0056] Optionally, the resilient closing valve 120 is made of nickel-titanium metal. In this embodiment, a nickel-titanium shape memory alloy is selected.

[0057] Optionally, the biodegradable restraint component is made of polylactic acid, polyglycolic acid, polyglycolic acid, polyglycolic acid, polydioxanone, polycaprolactone, polytrimethylene carbonate, or a composite material of at least two of the aforementioned materials. In this embodiment, polylactic acid is selected as the material.

[0058] Furthermore, in this embodiment, the biodegradable restraint member 130 is an annular member, and the elastic closing valve member 120 includes a collar 121 and a plurality of pressing feet 122. The collar 121 is sleeved on the outside of the release tube 112, and one end of each pressing foot 122 is connected to the collar 121, while the other end is sleeved inside the annular member.

[0059] The annular component fits one end of each squeezing foot 122 into it, causing the extension angle of the squeezing foot 122 to change and squeeze the release tube 112, thus closing the liquid outlet channel. After the annular component degrades, the extension angle of the squeezing foot 122 returns to normal, the squeezing effect on the release tube 112 disappears, and the liquid outlet channel opens.

[0060] Furthermore, each extrusion foot 122 has a protrusion 123 on the outer side of the end away from the annular part to prevent the annular part sleeved on the extrusion foot 122 from slipping off.

[0061] Specifically, the number of extrusion feet 122 can be 2, 3, 4 or 5, etc. In this embodiment, the number of extrusion feet 122 is 4.

[0062] Example 2

[0063] like Figure 3-5 As shown, the implementation principle of this embodiment is the same as that of embodiment 1. For any parts not mentioned, please refer to embodiment 1.

[0064] In this embodiment, the biodegradable restraint is a restraint sleeve, and the elastic closing valve 120 includes a strip plate 124 and two arc-shaped extrusion portions 125 respectively connected to opposite ends of the strip plate 124, with the inner sides of the two arc-shaped extrusion portions 125 arranged opposite to each other.

[0065] Position the release tube 112 between the two arc-shaped extrusion sections 125, and bend the opposite ends of the strip plate 124 inward so that the outer arcs of the two arc-shaped extrusion sections 125 approach the strip plate 124, until the release tube 112 is pressed against the strip plate 124 and the arc-shaped extrusion sections 125 by the outer arcs of the two arc-shaped extrusion sections 125. The elastic closing valve 120 completes its deformation. A restraining sleeve is then placed over the deformed elastic closing valve 120 to restrain it, thereby closing the liquid outlet channel. After the restraining sleeve degrades, the elastic closing valve 120 returns to its original shape, the extrusion effect on the release tube 112 disappears, and the liquid outlet channel opens.

[0066] Preferably, in order to reduce the weight of the balloon release valve 100, the strip plate has a hollowed-out portion, and the restraint sleeve also has a hollowed-out portion.

[0067] Example 3

[0068] like Figure 6 and 7 As shown, the implementation principle of this embodiment is the same as that of embodiment 1. For any parts not mentioned, please refer to embodiment 1.

[0069] In this embodiment, the biodegradable restraint is a restraint ring, and the elastic closing valve 120 is a curled structure, which includes a strip plate 124, two deformable arc plates 126 respectively connected to opposite ends of the strip plate 124, and two arc-shaped abutment portions 127 respectively connected to the two deformable arc plates 126 and curled inward.

[0070] Position the release tube 112 on the back side of the strip plate 124, and bend the two deformable arc plates 126 in opposite directions, causing the two arc-shaped abutment parts 127 to rotate until they press against the release tube 112 with the strip plate 124. At this time, the two arc-shaped abutment parts 127 are in a back-to-back state, and the elastic closing valve 120 completes its deformation. The binding ring is then placed on the inner side of the arc of the two arc-shaped abutment parts 127 to bind the elastic closing valve 120, thereby closing the liquid outlet channel. After the binding ring degrades, the elastic closing valve 120 returns to its original shape, the squeezing effect on the release tube 112 disappears, and the liquid outlet channel opens.

[0071] Preferably, in order to reduce the weight of the balloon release valve 100, the strip plate has a hollowed-out portion, and the restraint sleeve also has a hollowed-out portion.

[0072] The above are three embodiments provided by the present invention. Although the elastic closing valve 120 appears to be made of a rigid material, it is located inside the balloon. After the liquid inside the balloon is released, it is wrapped by the balloon wall. The rigid elastic closing valve will not come into direct contact with the stomach wall and intestinal wall. Therefore, it will not cause scratches or other effects to the gastrointestinal tract.

[0073] This invention also provides an intragastric balloon, comprising a balloon body with a one-way self-sealing inlet valve and a balloon release valve provided in this invention. The balloon body has a release valve mounting port, and the connecting arc surface is connected to the balloon wall of the balloon body corresponding to the mounting port.

[0074] A long water-filled tube is inserted into a one-way self-sealing inlet valve. A gastric balloon is then implanted into the stomach. Physiological saline is injected into the balloon through the tube, filling it completely. The filled balloon occupies space in the stomach, increasing satiety and reducing appetite, thus aiding in weight loss. Once the biodegradable confinement component degrades in the saline solution, the outlet channel opens, releasing the saline solution and allowing the balloon to be expelled through the intestines. The specific structure of the balloon with the one-way self-sealing inlet valve can be found in existing technology and will not be elaborated upon here.

[0075] Balloon actual expulsion time test experiment:

[0076] The balloon release valves provided in Examples 1, 2, and 3 are made into an intragastric balloon, which has a volume of 470ml to 500ml when fully inflated.

[0077] Three groups of healthy (gastrointestinal disease-free) adult pigs were used in the experiment, with 10 pigs in each group. The three groups of experimental pigs were implanted with gastric balloons made of balloon release valves from Examples 1, 2, and 3, respectively, and physiological saline was filled into the gastric balloons. It was expected that the degradable restraints would degrade after 120 days. After 115 days, the presence of balloons in the pig feces was observed, and the actual expulsion time of the balloons was recorded in Table 1.

[0078] Table 1. Actual time (in days) for sac expulsion in each group of experimental pigs.

[0079]

[0080] As can be seen from Table 1, the actual expulsion time of the balloons in the experimental pigs in each group did not differ by many days, and were all within 3 days before or after the expected expulsion time.

[0081] Balloon safety verification experiment:

[0082] One pig was randomly selected from each of the three groups in the previous experiment. After the balloon was expelled, the pig's stomach and intestinal walls were observed for ulcers or inflammation.

[0083] like Figure 8-10 As shown, Figure 8-10 The images show the stomach wall conditions of pigs after the balloons made from the balloon release valves provided in Examples 1, 2, and 3 were implanted into the stomachs of pigs and then removed. As can be seen from the images, the stomach walls of each pig were smooth without ulcers or inflammation, indicating that the balloons made from the balloon release valves provided in this invention will not harm the stomach after implantation.

[0084] like Figure 11-13 As shown, Figure 11-13 The images show the intestinal wall condition of pigs after the balloons prepared in Examples 1, 2, and 3 were implanted into the stomach and removed. As can be seen from the images, the intestinal wall of each pig was smooth without ulcers or inflammation, indicating that the balloon release valve provided by this invention will not harm the intestines after being implanted into the stomach.

[0085] The results indicate that the balloon release valve provided in this embodiment of the invention has better safety when applied to a balloon.

[0086] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A balloon release valve, characterized in that, Includes valve body, resilient closing valve element, and biodegradable restraint element; The valve body includes a connecting arc surface for connecting with the balloon body and a release tube. The connecting arc surface has a release port in the middle. The release tube is located inside the arc surface of the connecting arc surface and communicates with the release port to form a liquid outlet channel. The biodegradable constraint is fitted onto the elastic closing valve, causing the elastic closing valve to deform. The deformed elastic closing valve and the biodegradable constraint work together to squeeze the release tube outside the release tube, thus closing the liquid outlet channel. After the biodegradable constraint degrades, the elastic closing valve returns to its shape, and the liquid outlet channel opens. The valve body is made of organic polymer membrane material; The biodegradable constraint is one of the following three structures: (1) The biodegradable constraint is a ring-shaped component, and the elastic closing valve includes a collar and multiple extrusion feet. The collar is sleeved outside the release tube, and one end of each extrusion foot is connected to the collar, while the other end is sleeved inside the ring-shaped component. The annular component fits one end of each of the squeezing feet into it, causing the extension angle of the squeezing feet to change and squeeze the release tube, thus closing the liquid outlet channel; after the annular component degrades, the extension angle of the squeezing feet returns to normal, the squeezing effect on the release tube disappears, and the liquid outlet channel opens. (2) The biodegradable constraint is a restraint sleeve, and the elastic closing valve includes a strip plate and two arc-shaped extrusion parts respectively connected to opposite ends of the strip plate, with the inner sides of the two arc-shaped extrusion parts arranged opposite to each other; Positioning the release tube between the two arc-shaped extrusion sections, the opposite ends of the strip plate are bent inwards, bringing the outer arcs of the two arc-shaped extrusion sections close to the strip plate until the release tube is pressed against the strip plate and the arc-shaped extrusion sections by the outer arcs of the two arc-shaped extrusion sections. The elastic closing valve completes its deformation. The binding sleeve is then placed over the deformed elastic closing valve to bind it, thereby closing the liquid outlet channel. After the binding sleeve degrades, the elastic closing valve returns to its original shape, the extrusion force on the release tube disappears, and the liquid outlet channel opens. (3) The biodegradable constraint is a binding ring, and the elastic closing valve is a curled structure, which includes a strip plate, two deformable arc plates respectively connected to the opposite ends of the strip plate, and two arc-shaped abutment parts respectively connected to the two deformable arc plates and curled inward. Position the release tube on the back side of the strip plate, and bend the two deformable arc plates in opposite directions, causing the two arc-shaped abutment portions to rotate until they press against the release tube with the strip plate. At this point, the two arc-shaped abutment portions are in a back-to-back state, and the elastic closing valve completes its deformation. The binding ring is then fitted onto the inner side of the arc of the two arc-shaped abutment portions to bind the elastic closing valve, thereby closing the liquid outlet channel. After the binding ring degrades, the elastic closing valve returns to its original shape, the squeezing effect on the release tube disappears, and the liquid outlet channel opens.

2. The balloon release valve according to claim 1, characterized in that, When the biodegradable constraint is of the (1) type, each of the extrusion feet has a protrusion on the outer side of the end away from the annular part to prevent the annular part fitted on the extrusion foot from slipping off.

3. The balloon release valve according to claim 1, characterized in that, When the biodegradable constraint is of the (2nd) or (3rd) type, the strip plate has a hollowed-out portion.

4. The balloon release valve according to claim 1, characterized in that, The valve body is made of polyurethane, silicone, polyethylene, or a composite material of at least two of the aforementioned materials.

5. The balloon release valve according to any one of claims 1 to 4, characterized in that, The resilient closing valve is made of nickel-titanium metal.

6. The balloon release valve according to any one of claims 1 to 4, characterized in that, The biodegradable restraint is made of polylactic acid, polyglycolic acid, polyglycolic acid, polyglycolic acid, polydioxanone, polycaprolactone, polytrimethylene carbonate, or a composite material of at least two of the aforementioned materials.

7. A gastric balloon, characterized in that, The invention includes a balloon body with a one-way self-sealing inlet valve and a balloon release valve as described in any one of claims 1 to 6, wherein the balloon body has a release valve mounting port, and the connecting arc surface is connected to the balloon wall of the balloon body corresponding to the mounting port.

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