A manually depressurized bubble bottle structure

Abstract

This utility model discloses a manually depressurized bubble bottle structure, including a bottle body and a cap assembly connected to the top of the bottle body and capable of sealing the bottle body. The cap assembly has an air inlet channel for injecting gas, and at least a first venting channel and a corresponding first pressure relief hole communicating with the inner cavity of the bottle body. The first venting channel has a first valve core and a first elastic element for pushing the first valve core against and sealing the first pressure relief hole. The cap assembly includes a top cover that is detachable. One end of the first elastic element abuts against the first valve core, and the other end of the first elastic element abuts against the top cover. When the top cover is removed, the first elastic element loses its support, and the first valve core disengages from the first pressure relief hole under the pressure inside the bottle, thus achieving manual pressure relief. The purpose of this utility model is to overcome the shortcomings of the prior art and provide a manually depressurized bubble bottle structure that ensures sealing performance and ease of disassembly.

Description

Technical Field

[0001] This utility model specifically relates to a bubble bottle structure with manual pressure relief. Background Technology

[0002] With the increasing popularity of healthy eating concepts, consumers are placing higher demands on the functionality, taste diversity, and freshness of beverages. Sparkling beverages, with their refreshing and stimulating taste, good flavor carrying capacity, and the rich natural nutrients found in freshly squeezed juice, are gradually becoming a popular beverage type in modern homes and offices. However, most related equipment on the market currently sets up sparkling water making and juice blending functions separately, requiring users to operate different machines to complete the preparation process. This not only occupies a lot of space and has high operating costs but is also cumbersome to operate, making it difficult to achieve the convenient "one-click" experience. To solve the above problems, the inventor previously applied for a technical solution with patent number CN202510150542.5, entitled "An Integrated Sparkling Juicer." This patent proposes an innovative structure that integrates blending and carbonation functions. Its core lies in the design of a dedicated sparkling beverage bottle capable of withstanding internal pressure, which can inject gases such as carbon dioxide into the bottle during or after juice blending, directly generating a complex beverage with both fruity aroma and a bubbly feel. This design effectively achieves functional integration, significantly improving user convenience and the richness of the drinking experience.

[0003] However, in actual use and maintenance, it was found that the sparkling beverage bottle still has certain limitations in terms of cleaning. Since its interior comes into direct contact with the beverage, long-term use can easily lead to the accumulation of organic matter such as fruit juice and sugar, fostering bacterial growth. Therefore, it must be thoroughly cleaned regularly and even sterilized at high temperatures to ensure drinking safety. This places higher demands on the bottle structure's disassembly capability—especially the connection between the cap assembly and the bottle body, which should allow users to quickly and safely disassemble and assemble it. At the same time, to achieve an effective carbonation process, a high gas pressure is usually required inside the bottle, demanding that the cap assembly possess excellent sealing performance and structural strength. While traditional threaded or snap-on sealing structures can meet high-pressure sealing requirements, forced disassembly under high pressure can easily cause safety hazards: for example, sudden gas release leading to liquid splashing, cap popping out and causing injury, or permanent damage to the sealing components due to uneven stress, affecting subsequent sealing performance.

[0004] This utility model was developed precisely because of the aforementioned shortcomings. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a bubble bottle structure that can be manually depressurized while ensuring sealing performance and easy disassembly.

[0006] This utility model is achieved through the following technical solution:

[0007] This invention provides a manually depressurized bubble bottle structure, including a bottle body and a cap assembly connected to the top of the bottle body and capable of sealing the bottle body. The cap assembly has an air inlet channel for injecting gas, and at least a first venting channel and a corresponding first pressure relief hole communicating with the inner cavity of the bottle body. The first venting channel has a first valve core and a first elastic element for pushing the first valve core against and sealing the first pressure relief hole. The cap assembly includes a detachable top cover. One end of the first elastic element abuts against the first valve core, and the other end abuts against the top cover. When the top cover is removed, the first elastic element loses its support, and the first valve core disengages from the first pressure relief hole under the pressure inside the bottle, thus achieving manual pressure relief.

[0008] As described above, the manually depressurized bubble bottle structure includes a first venting channel comprising a valve core cavity section with a larger diameter and a limiting section with a smaller diameter. The first venting hole is connected to the valve core cavity section. The first valve core is located in the valve core cavity section. The first elastic element includes a large-diameter section located in the valve core cavity section and abutting against the first valve core, and a small-diameter section passing through the limiting section and abutting against the top cover.

[0009] As described above, the manually depressurized bubble bottle structure includes a second venting channel on the bottle cap assembly and a second pressure relief hole that connects the second venting channel to the inner cavity of the bottle. The second venting channel contains a second valve core and a second elastic element for pushing the second valve core against and closing the second pressure relief hole.

[0010] As described above, the manually depressurized bubble bottle structure includes a bottle cap assembly comprising a bottle cap seat, an outer valve seat, an inner valve seat, and a top cap. The bottle cap seat is connected to the bottle body and clamps and fixes the outer valve seat between the bottle body and the bottle cap seat. The outer valve seat has a mounting groove, and the inner valve seat is disposed in the mounting groove. The top cap is detachably connected to the bottle cap seat and presses the inner valve seat against the bottom of the mounting groove. The inner valve seat and the outer valve seat together define the valve core cavity section, and the limiting section is formed on the inner valve seat.

[0011] As described above, the manually depressurized bubble bottle structure has a locking hole on the cap seat and a buckle on the top cover that can be engaged with the locking hole, thereby making the top cover detachably connected to the cap seat. The top edge of the cap seat has an operating groove, and the top cover has an operating protrusion located in the operating groove.

[0012] As described above, the manually depressurized bubble bottle structure includes an upper support extending upwards and a lower support extending downwards and corresponding to the upper support on the inner valve seat. The inner valve seat has a first channel segment, the upper end of which passes through the upper support and opens, and the lower end extends and terminates at the lower part of the lower support. The lower part of the lower support has an air injection hole communicating with the first channel segment. The top cover is pressed against the top of the upper support. The top cover has a second channel segment corresponding to the first channel segment, and the first channel segment and the second channel segment are connected to form the air intake channel.

[0013] As described above, in the manually depressurized bubble bottle structure, the outer valve seat is provided with an injection pipe that extends into the bottle body, the lower support extends into the injection pipe, and an anti-reverse valve sleeve is fitted on the lower support. The anti-reverse valve sleeve covers and seals the injection hole, forming a one-way air intake structure.

[0014] As described above, in the manually depressurized bubble bottle structure, the first venting channel has a first sealing surface at one end near the first pressure relief hole, and the lower part of the first valve core has a second sealing surface that matches the shape of the annular sealing surface. When the first sealing surface and the second sealing surface abut against each other, a sealing fit is formed.

[0015] As described above, in the manually depressurized bubble bottle structure, the first valve core includes a valve core support and a valve core sleeve fitted around the outer periphery of the valve core support.

[0016] As described above, in the manually depressurized bubble bottle structure, the outer wall of the valve core sleeve is provided with an axially arranged guide rib.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] 1. This bubble bottle features a safe and controllable manual pressure relief mechanism, enhancing user safety. The design cleverly links the cap removal process with the pressure relief process by using the top cap as the support end of the pressure relief valve's elastic element. Before opening the bottle, the user simply removes the top cap, causing the first elastic element to lose its support and releasing the first valve core. This allows the high-pressure gas inside the bottle to automatically escape through the first venting channel, achieving a safe "pressure relief before opening" operation. This effectively avoids safety hazards such as liquid splashing and cap ejection caused by opening under pressure.

[0019] 2. The compact structure and high integration balance sealing performance with ease of disassembly and assembly. The bottle cap assembly adopts a modular design, including a cap holder, inner and outer valve seats, and a removable top cap. These components work together to form a stable, multi-layered sealing structure, ensuring high internal pressure resistance while allowing for quick and easy disassembly and cleaning. It is particularly suitable for beverage containers requiring frequent cleaning, resolving the conflict between high-pressure sealing and hygienic maintenance.

[0020] 3. Easy to operate and with a superior user experience, it is suitable for promotion in home use. The design of the buckle and the operating eaves makes the top cover easy and effortless to remove, which conforms to ergonomic operating habits. Manual pressure relief does not require additional buttons or complicated operations, and is intuitive and easy to understand, which significantly reduces the user's learning cost. It is especially suitable for safe use by family members such as the elderly and children, and has good market application prospects. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the bubble bottle structure of this utility model;

[0022] Figure 2 This is a cross-sectional schematic diagram of the bubble bottle structure of this utility model;

[0023] Figure 3 This is an exploded view of the bubble bottle structure of this utility model. Figure 1 ;

[0024] Figure 4 This is an exploded view of the bubble bottle structure of this utility model. Figure 2 ;

[0025] Figure 5 This is a partial cross-sectional schematic diagram of the bubble bottle structure of this utility model;

[0026] Figure 6 This is an exploded view of the first valve core of this utility model. Detailed Implementation

[0027] The utility model will be further described below with reference to the accompanying drawings:

[0028] The orientations described in this utility model specification, such as "up," "down," "left," "right," "front," and "back," are based on the orientations in the accompanying drawings and are intended to facilitate the description of the relationships between the various components. They do not indicate the unique or absolute positional relationships between the various components, but are merely one embodiment of the utility model and are not a limitation on its implementation.

[0029] This embodiment describes a manually depressurized bubble bottle structure, such as... Figures 1 to 6As shown, this type of bubble bottle structure includes a bottle body 1 and a cap assembly 2 connected to the top of the bottle body 1 to seal the bottle body 1. The cap assembly 2 is provided with an air inlet channel 3 for injecting gas. The cap assembly 2 is provided with at least a first venting channel 4 and a corresponding first pressure relief hole 40 communicating with the inner cavity of the bottle body 1. The first venting channel 4 is provided with a first valve core 21 and a first elastic member 22 for pushing the first valve core 21 against and sealing the first pressure relief hole 40. The cap assembly 2 includes a top cover 23 located at the top and removable. One end of the first elastic member 22 abuts against the first valve core 21, and the other end of the first elastic member 22 abuts against the top cover 23. When the top cover 23 is removed, the first elastic member 22 loses its support, and the first valve core 21 disengages from the first pressure relief hole 40 under the pressure inside the bottle, realizing manual pressure relief. When the bottle needs to be opened, opening the top cap 23 allows the internal pressure to be released through the first pressure relief hole 40, balancing the internal and external pressures and making it easy to disassemble the cap assembly 2. This structure is compact, easy to operate, and allows for manual pressure relief before disassembling the cap. Structural principle explanation: The core of this structure lies in using the top cap 23 as the support end of the first elastic element 22, forming a "controlled release" pressure relief mechanism. Under normal sealing conditions, the first elastic element 22 (like a spring) is compressed, continuously applying a downward elastic force to the first valve core 21, causing the first valve core 21 to be tightly pressed against the first pressure relief hole 40, achieving a seal. Once the user actively removes the top cap 23, the reaction support point of this elastic force disappears, and the first elastic element 22 no longer provides clamping force. If there is positive pressure gas inside the bottle, the gas pressure will push the first valve core 21 upwards, forcing it to disengage from the first pressure relief hole 40, thereby opening the first venting channel 4 and achieving a rapid and controllable manual pressure relief process. This design cleverly links the "operation action" with the "pressure relief trigger," eliminating the need for additional buttons or rotating mechanisms and enhancing safety and user experience. It achieves a safe "pressure relief first, then cap opening" operating procedure, preventing liquid splashing or cap ejection caused by sudden release of high-pressure gas. The structure is simple and reliable; pressure relief is triggered simply by removing the top cap, without complex mechanical linkages. The pressure relief response is rapid, automatically pushing the valve core based on the internal gas pressure, making it highly responsive. It is suitable for applications requiring frequent refilling and degassing, such as carbonated beverages, aerosols, and home soda makers.

[0030] As a preferred option, such as Figures 2 to 5As shown, the first venting channel 4 includes a valve core cavity section 41 with a larger diameter and a limiting section 42 with a smaller diameter. The first pressure relief hole 40 is connected to the valve core cavity section 41. The first valve core 21 is located in the valve core cavity section 41. The first elastic element 22 includes a large-diameter section 221 located in the valve core cavity section 41 and abutting against the first valve core 21, and a small-diameter section 222 passing through the limiting section 42 and abutting against the top cover 23. That is, the first elastic element 22 is a stepped spring with at least two sections of different diameters. Of course, a stepped spring may not be used, or a soft and elastic silicone material may be used to make two columnar elastic elements. Furthermore, the radial dimension of the first valve core 21 is larger than that of the limiting section 42, preventing the first valve core 21 from detaching upwards. Also, the sum of the length of the first valve core 21 and the length of the large-diameter section 221 is less than the length of the valve core cavity section 41, allowing the large-diameter section 221 of the first elastic element 22, in its natural state, to have a certain axial movement space within the valve core cavity section 41, enabling the first valve core 21 to release pressure. Meanwhile, the radial dimension of the small-diameter section 222 of the first elastic element 22 is smaller than that of the limiting section 42, and the small-diameter section 222 extends upwards from the limiting section 42 and abuts against the top cover 23. This design effectively disables the supporting force of the first elastic element 22, while also preventing it from detaching after the top cover 23 is removed, resulting in a more stable and reliable structure. The stepped first venting channel 4, through the cooperation of the valve core cavity section 41 and the limiting section 42, achieves spatial limitation and functional zoning of the first valve core 21 and the first elastic element 22: the valve core cavity section 41 provides sufficient space to accommodate the first valve core 21 and the large-diameter section 221, ensuring that it can move freely upward under air pressure; the limiting section 42 guides and axially constrains the small-diameter section 222, preventing the spring from shifting or jamming. The stepped spring design allows it to withstand large compressive forces while also transmitting and supporting forces through the narrow channel via the small-diameter section 222. When the top cover 23 is removed, the small-diameter section 222 loses its upper support, and the entire elastic element tends to extend; however, because the large-diameter section 221 is still limited by the cavity size, it will not fully pop out, ensuring structural integrity. The stepped spring structure balances sealing stability and pressure relief reliability; the small-diameter protrusion design prevents the spring from falling off completely, improving durability; the limiting section 42 and the valve core cavity section 41 form a stepped limit, effectively preventing the first valve core 21 from moving too far upward or falling out; it can be replaced with a silicone elastic element to adapt to different cost and environmental protection requirements, expanding the range of material choices.

[0031] Detailed structure reference Figures 2 to 5The bottle cap assembly 2 includes a bottle cap seat 26, an outer valve seat 27, an inner valve seat 28, and a top cap 23. The bottle cap seat 26 is connected to the bottle body 1 and clamps and fixes the outer valve seat 27 between the bottle body 1 and the bottle cap seat 26. The outer valve seat 27 has a mounting groove 270, and the inner valve seat 28 is disposed in the mounting groove 270. The top cap 23 is detachably connected to the bottle cap seat 26 and presses the inner valve seat 28 against the bottom of the mounting groove 270. The inner valve seat 28 and the outer valve seat 27 together define the valve core cavity section 41, and the limiting section 42 is formed on the inner valve seat 28. Preferably, a sealing gasket 201 can be provided between the bottle body 1 and the outer valve seat 27. This structure provides a stable and secure connection and facilitates installation and disassembly. The bottle cap assembly 2 adopts a modular, split-structure design: the bottle cap seat 26 serves as the main load-bearing component and is connected to the bottle body 1 via threads or snap-fit; the outer valve seat 27 is embedded and fixed at the bottle mouth, providing a basic sealing surface; the inner valve seat 28 is nested in the mounting groove 270 of the outer valve seat 27 and is pressed and positioned from above by the top cover 23, thus forming a stable multi-layer sealing structure. The valve core cavity 41 is formed by the inner and outer valve seats, ensuring smooth movement of the first valve core 21. The sealing gasket 201 further enhances the static sealing performance between the bottle body and the bottle cap, preventing gas leakage along the threads. The collaborative assembly of multiple components improves the overall structural strength and sealing reliability; the modular design facilitates production, quality control, and subsequent maintenance; the sealing gasket 201 enhances the overall airtightness and is suitable for high-pressure environments; the mating method of the inner and outer valve seats facilitates precision injection molding, reducing manufacturing difficulty.

[0032] Preferably, for ease of operation and disassembly of the top cover 23, such as Figures 2 to 5 As shown, the bottle cap holder 26 has a locking hole 261, and the top cover 23 has a buckle 231 that can be engaged with the locking hole 261, thus allowing the top cover 23 to be detachably connected to the bottle cap holder 26. The top edge of the bottle cap holder 26 has an operating groove 262, and the top cover 23 has an operating protrusion 232 located in the operating groove 262. Operation involves using a finger to move the operating protrusion 232, thereby flipping open and disassembling the top cover 23. The buckle 231 and the locking hole 261 form a quick-connect pair, enabling repeated disassembly and reassembly of the top cover 23. The operating protrusion 232 is embedded in the operating groove 262, concealing the point of force for disassembly, maintaining a neat appearance, and allowing the user to easily pry it open with a fingernail or fingertip. This structure mimics the common "flip-top" sealing design, conforming to ergonomic operating habits. The snap-fit ​​connection makes disassembly and assembly convenient and requires no tools; the operating protrusion 232 and the operating groove 262 cooperate to prevent accidental contact and make it easy to open; the structure is compact and does not affect the overall aesthetics; it supports high-frequency use and has good wear resistance.

[0033] As a preferred option, such as Figure 2 and Figure 5As shown, the inner valve seat 28 has an upwardly extending upper support column 281 and a downwardly extending lower support column 282 corresponding to the upper support column 281. The inner valve seat 28 has a first channel segment 280, the upper end of which passes through the upper support column 281 and opens, and the lower end extends and terminates at the lower part of the lower support column 282. The lower part of the lower support column 282 has an injection hole 283 communicating with the first channel segment 280. The top cover 23 presses against the top of the upper support column 281. The top cover 23 has a second channel segment 230 corresponding to the first channel segment 280. The first channel segment 280 and the second channel segment 230 are connected to form the air intake channel 3, for the insertion of an injection pipe or injection structure to inject gases such as carbon dioxide. The upper support column 281 and the lower support column 282 form the upper and lower connection nodes of a through-type injection conduit. The first channel segment 280 is located inside the inner valve seat 28, and the second channel segment 230 is located in the top cover 23. When aligned, they form a complete air intake channel 3. When the top cover 23 is installed in place, the two channels automatically align and connect. During gas injection, external gas enters through this channel and is introduced into the bottle via the injection hole 283. This structure achieves the dual functions of "dynamic sealing + static conduction". The segmented air intake channel facilitates independent processing and assembly of each component; the gas injection path is clear, with low resistance, which is conducive to efficient gas filling; the top cover participates in the formation of the air intake channel, resulting in high structural integration; the support structure enhances local strength and prevents deformation during gas injection.

[0034] As a preferred option, such as Figure 2 and Figure 5 As shown, the outer valve seat 27 is provided with an injection pipe 271 extending into the bottle body 1. The lower support column 282 extends into the injection pipe 271, and an anti-reverse valve sleeve 29 is fitted on the lower support column 282. The anti-reverse valve sleeve 29 covers and seals the injection hole 283, forming a one-way air intake structure. This structure allows air to enter by the air pressure pushing open the anti-reverse valve sleeve 29, while the gas inside the bottle cannot push the anti-reverse valve sleeve 29 back, thus achieving one-way air intake. The anti-reverse valve sleeve 29 is typically made of flexible silicone or rubber material, and normally fits tightly against the injection hole 283 to form a seal. When external gas is injected, the airflow pressure overcomes the elasticity of the valve sleeve, causing it to partially deform and open, allowing gas to flow into the bottle. When the pressure inside the bottle is higher than outside, the gas presses back against the valve sleeve, making it seal the injection hole 283 more tightly, thereby achieving the one-way valve function. The lower support column 282 is inserted into the injection pipe 271 to ensure coaxial alignment, improving sealing reliability. Effectively prevents gas backflow from the bottle, ensuring long-lasting carbonation; requires no additional springs or complex mechanisms, resulting in low cost and high reliability; the flexible valve sleeve has excellent self-sealing performance, suitable for various gas media; easy to maintain, and the entire valve sleeve can be replaced when necessary.

[0035] As a preferred solution, in order to achieve the opening and closing function of the first venting channel 4, such as Figure 2 and Figure 5 As shown, the first venting channel 4 has a first sealing surface 400 at one end near the first pressure relief hole 40, and the lower part of the first valve core 21 has a second sealing surface 210 that matches the shape of the annular sealing surface. When the first sealing surface 400 and the second sealing surface 210 abut against each other, a sealing fit is formed. The first sealing surface 400 and the second sealing surface 210 constitute a pair of precision-fitted sealing pairs, usually designed as conical or planar sealing structures. When the first elastic element 22 applies pressure, the second sealing surface 210 is tightly attached to the first sealing surface 400, forming an airtight contact; when depressurization occurs, the first valve core 21 moves upward, the two sealing surfaces separate, and the gas can enter the first venting channel 4 from the first pressure relief hole 40 and be discharged. The geometric accuracy and surface finish of the sealing surfaces directly affect the sealing effect. The matching design of the sealing surfaces improves the sealing reliability and reduces the risk of leakage; various material combinations such as metal-silicone and plastic-rubber can be used to adapt to different pressure levels; the conical seal has an automatic centering function and strong fault tolerance; it is easy to mold on injection molded parts and is suitable for mass production.

[0036] As a preferred option, such as Figure 2 and Figure 6 As shown, the first valve core 21 includes a valve core support 211 and a valve core sleeve 212 fitted around the outer periphery of the valve core support 211. This allows the first valve core 21 to be made of a combination of different materials. For example, the valve core support 211 can be made of a high-hardness plastic material, while the valve core sleeve 212 can be made of a soft and elastic silicone material, thus ensuring both support and sealing performance. Preferably, the outer wall of the valve core sleeve 212 is provided with an axially arranged guide rib 213. The composite first valve core 21 adopts a "hard core, soft sleeve" structure: the valve core support 211 provides structural strength and a connection base, and withstands spring pressure; the valve core sleeve 212 is responsible for fitting with the first sealing surface 400 to achieve a flexible seal. The guide rib 213 is arranged axially and contacts the inner wall of the valve core cavity 41 during the up-and-down movement of the first valve core 21, playing a guiding and anti-rotation role and preventing uneven wear of the sealing surface. The composite material design balances strength and sealing performance, extending service life; the guide rib 213 reduces motion friction and prevents jamming; it improves the smoothness of valve core movement, ensuring consistent pressure relief actions each time; and it facilitates the replacement of vulnerable parts (such as valve core sleeves), reducing maintenance costs.

[0037] As some variations of this embodiment, such as Figure 2 and Figure 5As shown, the bottle cap assembly 2 is also provided with a second venting channel 5 and a corresponding second pressure relief hole 50 connecting the second venting channel 5 to the inner cavity of the bottle body 1. The second venting channel 5 is provided with a second valve core 24 and a second elastic element 25 for pushing the second valve core 24 against and closing the second pressure relief hole 50. The structure of the second valve core 24 is the same as that of the first valve core 21, and the structure of the second venting channel 5 is the same as that of the first venting channel 4. The second elastic element 25 is located in the valve core cavity section 51 of the second venting channel 5. Alternatively, the second venting channel 5 and the second valve core 24 can be omitted. The structure of the second valve core 24 can also be different from that of the first valve core 21, which is an optimized solution, allowing for different pressure relief valve structures. Setting dual venting channels (first venting channel 4 and second venting channel 5) can achieve redundant or differentiated pressure relief control. For example, the two channels can be set with different opening pressures, or used for manual and automatic pressure relief modes respectively. The dual-valve design enhances pressure relief capability, making it particularly suitable for large-capacity or high-pressure vessels. Even if one channel fails, the other can still operate normally, improving safety. The dual-channel design improves pressure relief efficiency and system redundancy; supports differentiated function configurations (such as main / auxiliary pressure relief, fast / slow pressure relief); enhances product adaptability, making it suitable for multi-size cylinder platforms; and has strong structural scalability, facilitating subsequent functional upgrades.

[0038] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A manually depressurisable bulb structure characterised in that: The device includes a bottle body (1) and a cap assembly (2) connected to the top of the bottle body (1) and capable of sealing the bottle body (1). The cap assembly (2) is provided with an air inlet channel (3) for injecting gas. The cap assembly (2) is provided with at least a first vent channel (4) and correspondingly with a first pressure relief hole (40) that connects the first vent channel (4) to the inner cavity of the bottle body (1). The first vent channel (4) is provided with a first valve core (21) for pushing the first valve core (21) against and The first elastic element (22) that closes the first pressure relief hole (40) is a bottle cap assembly (2). The bottle cap assembly (2) includes a top cap (23) that is located on the top and is removable. One end of the first elastic element (22) abuts against the first valve core (21), and the other end of the first elastic element (22) abuts against the top cap (23). When the top cap (23) is removed, the first elastic element (22) loses its support, and the first valve core (21) disengages from the first pressure relief hole (40) under the pressure inside the bottle, thereby realizing manual pressure relief.

2. A manually pressure-relievable bulb structure according to claim 1, characterised in that: The first venting channel (4) includes a valve core cavity section (41) with a larger diameter and a limiting section (42) with a smaller diameter. The first pressure relief hole (40) is connected to the valve core cavity section (41). The first valve core (21) is located in the valve core cavity section (41). The first elastic element (22) includes a large-diameter section (221) located in the valve core cavity section (41) and abutting against the first valve core (21), and a small-diameter section (222) passing through the limiting section (42) and abutting against the top cover (23).

3. A manually depressurisable bulb structure according to either one of claims 1 or 2 characterised in that: The bottle cap assembly (2) is also provided with a second venting channel (5) and a second pressure relief hole (50) that connects the second venting channel (5) with the inner cavity of the bottle body (1). The second venting channel (5) is provided with a second valve core (24) and a second elastic element (25) for pushing the second valve core (24) against and closing the second pressure relief hole (50).

4. A manually pressure-relievable bulb structure according to claim 2, characterised in that: The bottle cap assembly (2) includes a bottle cap seat (26), an outer valve seat (27), an inner valve seat (28), and a top cover (23). The bottle cap seat (26) is connected to the bottle body (1) and clamps and fixes the outer valve seat (27) between the bottle body (1) and the bottle cap seat (26). The outer valve seat (27) is provided with an installation groove (270). The inner valve seat (28) is located in the installation groove (270). The top cover (23) is detachably connected to the bottle cap seat (26) and presses the inner valve seat (28) against the bottom of the installation groove (270). The inner valve seat (28) and the outer valve seat (27) together define the valve core cavity section (41). The limiting section (42) is opened on the inner valve seat (28).

5. A manually pressure-relievable bulb structure according to claim 4, characterised in that: The bottle cap holder (26) is provided with a locking hole (261), and the top cover (23) is provided with a buckle (231) that can be locked into the locking hole (261), thereby making the top cover (23) detachably connected to the bottle cap holder (26). The top edge of the bottle cap holder (26) is provided with an operating groove (262), and the top cover (23) is provided with an operating protrusion (232) located in the operating groove (262).

6. A manually pressure-relievable bulb structure according to claim 4, characterised in that: The inner valve seat (28) is provided with an upper support column (281) extending upward and a lower support column (282) extending downward and corresponding to the upper support column (281). The inner valve seat (28) is provided with a first channel segment (280). The upper end of the first channel segment (280) passes through the upper support column (281) and opens, while the lower end extends and terminates at the lower part of the lower support column (282). The lower part of the lower support column (282) is provided with an air injection hole (283) communicating with the first channel segment (280). The top cover (23) is pressed against the top of the upper support column (281). The top cover (23) is provided with a second channel segment (230) corresponding to the first channel segment (280). The first channel segment (280) and the second channel segment (230) are connected to form the air intake channel (3).

7. A manually pressure-relievable bulb structure according to claim 6, characterised in that: The outer valve seat (27) is provided with an injection pipe (271) that extends into the bottle body (1). The lower support (282) extends into the injection pipe (271). The lower support (282) is fitted with an anti-reverse valve sleeve (29). The anti-reverse valve sleeve (29) covers and seals the injection hole (283), forming a one-way air intake structure.

8. A manually depressurisable bulb structure according to either one of claims 1 or 2, characterised in that: The first venting channel (4) has a first sealing surface (400) at one end near the first pressure relief hole (40), and the lower part of the first valve core (21) has a second sealing surface (210) that matches the shape of the annular sealing surface. When the first sealing surface (400) and the second sealing surface (210) abut against each other, a sealing fit is formed.

9. A manually depressurisable bulb structure according to either one of claims 1 or 2, characterised in that: The first valve core (21) includes a valve core support (211) and a valve core sleeve (212) sleeved on the outer periphery of the valve core support (211).

10. A manually pressure-relievable bulb structure according to claim 9, characterised in that: The valve core sleeve (212) has an axially arranged guide rib (213) on its outer side wall.

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