Gas pressurizing device for beverage container

Abstract

The present invention provides a gas pressurizing device for a beverage container, which belongs to the technical field of beverage equipment. It solves the problem of how to increase the service life of a gas pressurizing device. The gas pressurizing device includes a gas cylinder provided with a gas nozzle and a top cover provided with a piston. A trigger is provided between the piston and the gas nozzle. The trigger includes a ring-shaped connecting portion, two pins, and a pushing portion. The connecting portion is sleeved on the gas nozzle and is slidably connected to the outer peripheral surface of the gas nozzle. The gas nozzle has a limiting portion that blocks the upper portion of the connecting portion. The pushing portion protrudes to one side of the pin. The pushing portion is located above the gas nozzle and can press the gas nozzle downward as the connecting portion moves downward; when the connecting portion abuts against the limiting portion, a distance is spaced between the pushing portion and the gas nozzle. During transportation or storage, a beverage container equipped with the gas pressurizing device is less susceptible to being mistakenly triggered by external environmental factors, causing the gas cylinder to open prematurely, thereby ensuring that the actual service life of the gas pressurizing device is relatively long.

Description

Technical Field

[0001] The invention belongs to the technical field of beverage equipment and relates to a gas pressurizing device for a beverage container. Background Art

[0002] A beverage dispenser is a device used to dispense beverages (such as beer, coffee, soda, etc.) from a beverage container. It is commonly used in commercial settings such as bars and cafes, as well as in home settings such as parties. Users can quickly dispense beverages using a beverage dispenser. A beverage dispenser includes a beverage container, a dispenser, and a faucet. To ensure that the beverage can be dispensed from the beverage container, the beverage container is typically filled with a high-pressure gas, such as carbon dioxide, to apply pressure to the beverage within the container, allowing the beverage to be squeezed out of the container.

[0003] In the prior art, in order to avoid insufficient air pressure in beverage containers, a gas pressurizing device is generally provided in the container for gas compensation and pressurization, such as the one in the appendix of Chinese patent document CN1125762C. Figure 6 The disclosed scheme includes a pressurizing device comprising a gas cylinder, a top cover connected to the gas cylinder, and a piston slidably disposed within the top cover. The piston divides the top cover into a closed upper chamber and a lower chamber communicating with the inner cavity of the container. When the air pressure in the lower chamber fluctuates, the piston moves up and down due to the pressure differential between the upper and lower chambers. The piston is connected to the gas nozzle of the gas cylinder via a trigger, which can push the gas nozzle to open. The lower end of the trigger is inserted into the gas hole of the gas nozzle and fixedly connected to the gas nozzle. The upper end has two pins, which are inserted into the piston. In order to prevent the pressurizing device from being mistakenly triggered due to air pressure fluctuations during storage or transportation before being installed in the container, a trigger structure is also designed on the piston of the pressurizing device. Before the pressurizing device is triggered, the pin of the trigger part is located in the sliding hole 475 of the piston. At this time, the pressurizing device is in an untriggered state, and the trigger part can slide relative to the piston. Even if the piston moves due to air pressure fluctuations, it will not cause the trigger part to move and open the air nozzle; when the pressurizing device is installed in the container, the high-pressure gas filled into the container can push the piston upward to disengage the pin from the sliding hole and get stuck on the piston, thereby triggering the pressurizing device to open and be in a triggered state; at this time, if the air pressure above and below the piston fluctuates, the piston will adaptively adjust and move and will drive the trigger part to control the action of the air nozzle.

[0004] The above-mentioned existing gas pressurizing devices have the following defects: 1. After the winery installs the existing pressurizing device into the wine barrel, it will fill the wine barrel with wine and high-pressure gas. At this time, the pressurizing device is in a triggered state. However, when the winery sells the wine barrel filled with wine to customers for use, the wine barrel equipped with the pressurizing device needs to be transported or stored. In this process, the wine barrel is affected by factors such as ambient temperature, which may cause the air pressure in the wine barrel to become low. When the air pressure becomes low, the air pressure in the upper chamber of the piston will be greater than the air pressure in the lower chamber. At this time, the piston will move downward. In this case, since one end of the existing trigger part is directly stuck on the piston through a pin and the other end is fixedly connected to the gas nozzle, the trigger part will drive the gas nozzle to move downward and open under the pressure of the piston. This will cause the winery to open the gas cylinder in advance before selling the wine barrel to the customer. The premature opening of the gas cylinder will cause the gas generating material in the gas cylinder to come into contact with the high-pressure gas in the wine barrel in advance, affecting its service life, and ultimately causing the actual service life of the gas cylinder to be far lower than the factory service life. 2. When a wine barrel equipped with a pressurizing device is sold to a customer for use, the existing pressurizing device has a trigger member that is fixed to the gas nozzle by being inserted into the air hole of the gas nozzle. On the one hand, when the piston presses the trigger member to push the gas nozzle, the trigger member is prone to bending and deformation after repeated use, which eventually causes the piston to be unable to completely push the gas nozzle to open, resulting in a reduction in the gas output of the gas cylinder that cannot meet the requirements and is scrapped; on the other hand, the trigger member is stuck in the air hole, which will block the air hole and affect the gas output of the gas cylinder, eventually causing the gas cylinder to be scrapped before all the gas is released, thereby shortening the service life of the gas cylinder. Summary of the Invention

[0005] The purpose of the present invention is to address the above-mentioned problems in the existing technology and to propose a gas pressurizing device for a beverage container. The technical problem to be solved by the present invention is how to increase the service life of the gas pressurizing device.

[0006] The objectives of the present invention can be achieved through the following technical solutions: A gas pressurizing device for a beverage container, comprising a gas cylinder and a top cover connected to the gas cylinder, the gas cylinder being provided with a cylindrical gas nozzle for controlling gas outlet, a piston being slidably arranged in the top cover, a triggering member being provided between the piston and the gas nozzle, and the triggering member being able to push the gas nozzle to open under the drive of the piston, characterized in that the triggering member comprises an annular connecting portion, two oppositely arranged and elastic pins, and a pushing portion, the connecting portion being sleeved on the gas nozzle and slidably connected to the outer peripheral surface of the gas nozzle, the gas nozzle being provided with a limiting portion protruding relative to the outer peripheral surface, the limiting portion blocking the upper part of the connecting portion, the two pins being integrally formed or fixed on the upper part of the connecting portion, the pushing portion being integrally formed or fixed on the pins and protruding to one side of the pins, the pushing portion being located above the gas nozzle and being able to press the gas nozzle downward as the connecting portion moves downward; when the connecting portion abuts against the limiting portion, the pushing portion and the gas nozzle are spaced a distance apart.

[0007] On the basis of the existing gas pressurizing device, the present invention changes the structure of the trigger part and the way it is connected to the gas nozzle, that is, by designing the trigger part to have an annular connecting part (the annular shape includes a circular ring, a square ring or a ring structure of other shapes, such as a hole in a square piece also falls within the scope of the annular definition), so that the trigger part can be put on the gas nozzle and slide with the gas nozzle, and then a limiting part is designed on the outer peripheral surface of the gas nozzle to block the top of the connecting part. This not only prevents the trigger part from disengaging from the gas nozzle and causing malfunction during the sliding process relative to the gas nozzle, but also ensures that the pressurizing device can normally realize the triggering and opening function. At the same time, combined with the design of the pushing part, on the one hand, it can avoid the gas nozzle from opening accidentally after being triggered, thereby improving the service life; on the other hand, when the pressurizing device needs to release gas after being triggered, through the above design, the trigger part will not block the air hole and affect the gas release, making the pressurizing device less likely to malfunction, thereby further improving the service life. Specifically, when the pressure device needs to be triggered, the piston will move up with the trigger member relative to the air nozzle. Due to the obstruction of the above-mentioned limit portion, the piston will only move up a short distance together with the trigger member, and the pin will no longer move up with it. Then, the piston will continue to move up, so that the pin can move relative to the piston from the non-triggered position to the triggered position to achieve triggering; at the same time, by designing a pushing portion that protrudes to one side and is located above the connecting portion on the pin, the pushing portion can press down the air nozzle as the connecting portion moves downward. Then, when the pressure device enters the triggered state, initially, the connecting portion rests on the limit portion. At this time, there is a distance between the pushing portion and the upper end surface of the air nozzle. When the wine barrel equipped with the pressure device is Before the wine barrel is sold to the customer, that is, during the transportation and storage process, even if the air pressure in the wine barrel is reduced due to environmental influences, at this time, since there is a distance between the pushing part and the upper end surface of the air nozzle, that is to say, even if there is an idle stroke to provide buffering when the piston moves downward, the piston will not drive the trigger part to directly push the air nozzle downward, thereby avoiding the pressurizing device in the wine barrel from opening in advance before the wine barrel is sold to the customer, which is beneficial to increasing the service life of the pressurizing device; when the wine barrel is delivered to the customer for use in dispensing wine, the air pressure in the wine barrel is reduced. At this time, after the trigger part has completed the above-mentioned idle stroke, if the piston continues to move downward, the pushing part of the trigger part can drive the air nozzle to move down and open, thereby realizing air discharge. In the above-mentioned gas outlet process, since the trigger part is mounted on the outside of the gas nozzle through the connecting part, the gas nozzle is opened only by the pushing part above the gas nozzle when gas is outlet. That is to say, the trigger part has no connection with the gas hole and will not block the gas hole. This can ensure that the gas cylinder opens and outlets gas smoothly and gas outlet failure is not prone to occur, so that the gas cylinder can complete the pressurization work according to the preset capacity, avoiding the situation of being scrapped due to failure in the middle of the process, thereby greatly improving the service life of the gas pressurization device.

[0008] In the aforementioned gas pressurizing device for a beverage container, the pushing portion is plate-shaped and arranged vertically. Its vertical projection is located outside the gas hole of the gas nozzle, and the pushing portion can abut against the upper end surface of the gas nozzle. This design ensures that when the pushing portion pushes the gas nozzle downward to open, it will not affect the gas outlet of the gas hole, ensuring smooth gas flow. This prevents gas outlet failures in the pressurizing device that could affect gas output or even render it useless, thereby extending the service life of the pressurizing device.

[0009] In the gas pressurizing device for the beverage container described above, each of the pins has two parallel and spaced-apart pushing parts, the spacing between the two pushing parts is greater than the diameter of the air hole of the gas nozzle, and the air hole of the gas nozzle is located between the two pushing parts. Through the above design, on the one hand, there are four points of force when the trigger member pushes the gas nozzle, so that the downward pressure of the piston on the trigger member can be distributed, so that the trigger member is not easily deformed during the pushing process, reducing the possibility of failure, and thus helping to increase the service life of the gas pressurizing device. On the other hand, the above spacing design also ensures that the air outlet of the air hole is unobstructed, thereby avoiding the air outlet failure of the pressurizing device that affects the air output or is scrapped, thereby increasing the service life of the pressurizing device.

[0010] In the aforementioned gas pressurizing device for a beverage container, the central portion of the connecting portion includes a cylindrical sleeve portion that is sleeved onto and slidably engages the outer circumference of the gas nozzle. This sleeve portion design improves the stability of the sliding engagement between the trigger member and the gas nozzle, making it less likely to cause a jam, thereby increasing the service life of the gas pressurizing device.

[0011] In the aforementioned gas pressurizing device for a beverage container, the lower end of the sleeve portion has a trumpet-shaped flared opening. This design facilitates the sleeve portion to penetrate the stop portion from top to bottom and fit over the outer circumference of the gas nozzle. This helps prevent deformation of the trigger during assembly, thereby ensuring the reliability of the trigger's subsequent operation and further improving the service life of the gas pressurizing device.

[0012] In the above-mentioned gas pressurizing device for beverage containers, the limiting portion is a shoulder integrally formed on the outer peripheral surface of the upper end of the gas nozzle. The above-mentioned integrated design is conducive to simplifying the structure, reducing the failure rate, and thus helping to increase the service life of the gas pressurizing device.

[0013] In the gas pressurizing device for the beverage container, the connecting portion has two folding portions corresponding to the pins, each of which is elastic and folds upward relative to the connecting portion. The folding portions are tilted inward relative to the vertical direction, and the lower ends of the pins are integrally formed with the folding portions and tilted outward relative to the vertical direction. The design of the folding portions makes it easier for the pins to elastically close, and the elastic deformation is not so severe, thereby making it less likely for the lower ends of the pins to mechanically break, which is beneficial for improving the reliability of the trigger member and thereby increasing the service life of the gas pressurizing device. On the other hand, when the trigger member is pushed downward by the piston, the design of the elastic folding portion between the lower end of the pin and the connecting portion can buffer and distribute the downward pressure on the pin, thereby making it less likely for the pin to bend and deform during use, thereby also increasing the service life of the gas pressurizing device.

[0014] In the above-mentioned gas pressurizing device of the beverage container, the middle part of the lower end of the piston has a cylindrical outer sleeve, and the outer sleeve has a cylindrical inner sleeve, and the inner sleeve has a slide arranged along the moving direction of the piston, and an annular groove is formed between the inner circumferential surface of the outer sleeve and the outer circumferential surface of the inner sleeve. The upper end of the pin has a corrugated reinforcement part, and the opening of the reinforcement part faces inward; when the gas pressurizing device is in an undeployed state, the reinforcement part is located in the slide and can slide up and down along the slide relative to the piston; when the gas pressurizing device is in a triggered state, the reinforcement part is stuck in the annular groove and fixed to the piston. By designing a corrugated reinforcement part at the upper end of the pin, and the opening of the reinforcement part faces inward, that is, the reinforcement parts on the two pins are opposite to each other, after such design, when the gas pressurizing device is in the untriggered state, the pin can slide and cooperate with the slide on the piston through the reinforcement part, and when the gas pressurizing device is in the triggered state, the pin can be fixed by the reinforcement part and the annular groove. In other words, the connection and cooperation between the pin and the piston are all achieved through the reinforcement part. The above-mentioned reinforcement part adopts a corrugated design, which makes the structural strength here relatively large and not easy to deform. In the process of switching to the triggered state, this corrugated structure will not get stuck because the outer side is an arc surface; after entering the annular groove, it can also be firmly stuck in the annular groove and the connection is firm. Therefore, through the above design, not only the trigger part is not easy to bend during use, but also not easy to loosen, thereby greatly improving the reliability of the trigger part, making the trigger part less likely to fail, and thus improving the service life of the gas pressurizing device.

[0015] In the aforementioned gas pressurizing device for a beverage container, the edge of the opening of the reinforcement portion has a gradually decreasing slope from top to bottom. This design allows the reinforcement portion to more easily engage with the annular groove during the triggering process, thereby preventing switching failures and further increasing the service life of the gas pressurizing device.

[0016] In the aforementioned gas pressurizing device for a beverage container, the inner side of the prong has a curved concave surface, while the outer side of the prong has a curved convex surface. This design improves the structural strength of the prong, making it less likely to deform during use, thereby increasing the service life of the gas pressurizing device.

[0017] Compared with the prior art, the gas pressurizing device of the beverage container has the following advantages:

[0018] 1. During transportation or storage, beverage containers equipped with the gas pressurizing device are less susceptible to the influence of external environmental factors and are less likely to be falsely triggered, causing the gas cylinder to open prematurely, thereby ensuring that the actual service life of the gas pressurizing device is relatively long;

[0019] 2. When a beverage container equipped with the gas pressurizing device is sold to a customer for use, the triggering member of the gas pressurizing device itself has good structural strength and is not easily bent or deformed during use. In addition, the connection method between the triggering member and the gas nozzle enables the triggering member to reliably drive and control the movement of the gas nozzle and ensure that the gas cylinder opens smoothly to release gas. The overall failure rate is very low, thereby greatly improving the service life of the gas pressurizing device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the gas pressurizing device.

[0021] Figure 2 It is a partial cross-sectional structural schematic diagram of the gas pressurizing device when it is in an untriggered state.

[0022] Figure 3 yes Figure 2 Schematic diagram of the locally enlarged structure at point A in the middle.

[0023] Figure 4 It is a partial cross-sectional structural schematic diagram of the gas pressurizing device when it is in a triggered state and not releasing gas.

[0024] Figure 5 It is a partial cross-sectional structural schematic diagram of the gas pressurizing device in a triggered state and when gas is discharged.

[0025] Figure 6 This is a schematic diagram of the connection structure between the trigger member and the gas nozzle when the gas pressurizing device is in an untriggered state.

[0026] Figure 7 It is a structural schematic diagram of the triggering member when the gas pressurizing device is in an untriggered state.

[0027] In the figure, 1. gas cylinder; 2. top cover; 3. gas nozzle; 31. limiting part; 3a, air hole; 4. piston; 41. outer sleeve; 42. inner sleeve; 421. slide; 43. annular groove; 5. trigger; 51. connecting part; 511. socket part; 5111, flaring; 52. pin; 521. reinforcement part; 5211, inclined surface; 53. pushing part; 54. folding part. DETAILED DESCRIPTION

[0028] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0029] Specifically, if Figure 1 As shown, the gas pressurizing device of the beverage container includes a gas cylinder 1 and a top cover 2 connected to the gas cylinder 1. Figure 2 As shown, the gas cylinder 1 is provided with a columnar gas nozzle 3 for controlling gas outlet, a piston 4 is slidingly provided in the top cover 2, the lower middle portion of the piston 4 has a cylindrical outer sleeve 41, the outer sleeve 41 has a cylindrical inner sleeve 42, the inner sleeve 42 has a slideway 421 arranged along the moving direction of the piston 4, and an annular groove 43 is formed between the inner circumference of the outer sleeve 41 and the outer circumference of the inner sleeve 42. A trigger 5 is provided between the piston 4 and the gas nozzle 3, and the trigger 5 can push the gas nozzle 3 to open under the drive of the piston 4. For example Figures 2 to 6 As shown, the trigger member 5 includes an annular connecting portion 51 that is sleeved onto the air nozzle 3 and slidably connected to the outer circumference of the air nozzle 3. The air nozzle 3 has a stopper 31 protruding from the outer circumference. The stopper 31 is a shoulder integrally formed on the outer circumference of the upper end of the air nozzle 3. The stopper 31 blocks the upper portion of the connecting portion 51. The connecting portion 51 has two opposing, resilient pins 52. The upper ends of the pins 52 have corrugated reinforcements 521, with the openings of the reinforcements 521 facing inward. The pins 52 also have a pusher 53 protruding to the side. The pusher 53 is located above the air nozzle 3 and is capable of pressing the air nozzle 3 downward as the connecting portion 51 moves downward. When the connecting portion 51 abuts the stopper 31, a distance is separated between the pusher 53 and the air nozzle 3.

[0030] More specifically, Figure 6 and Figure 7As shown, in this embodiment, the middle portion of the connecting portion 51 has a cylindrical sleeve portion 511, which is sleeved onto and slidably engages with the outer circumference of the air nozzle 3. The lower end of the sleeve portion 511 has a trumpet-shaped flared opening 5111. The push portion 53 is plate-shaped and arranged vertically. The vertical projection of the push portion 53 is located outside the air hole 3a of the air nozzle 3, and the push portion 53 can abut against the upper end surface of the air nozzle 3. Each pin 52 has two parallel and spaced push portions 53. The spacing between the two push portions 53 is greater than the aperture of the air hole 3a of the air nozzle 3, and the air hole 3a of the air nozzle 3 is located between the two push portions 53. The connecting portion 51 has two folded portions 54, corresponding one to each of the pins 52. These folded portions 54 are resilient and fold upward relative to the connecting portion 51. They are tilted inward relative to the vertical. The lower ends of the pins 52 are integrally formed with the folded portions 54 and tilted outward relative to the vertical. Furthermore, as a further improvement to the structure of the pins 52, the opening edge of the reinforcement portion 521 features a gradually descending slope 5211. The inner side of the pins 52 has a curved concave surface, while the outer side has a curved convex surface.

[0031] The working principle of this gas pressurizing device is as follows: Figure 2 As shown, when the gas pressurizing device is in an untriggered state, the reinforcement portion 521 is located in the slideway 421 and can slide up and down relative to the piston 4 along the slideway 421; when the gas pressurizing device is installed in the container and needs to be triggered, high-pressure gas is filled into the container, and the piston 4 moves upward under the action of the high-pressure gas until the pin 52 disengages from the slideway 421 and bounces into the annular groove 43. At this time, the reinforcement portion 521 of the pin 52 is stuck in the annular groove 43 and fixed to the piston 4. During this process, the connection portion 51 of the trigger member 5 is blocked by the limit portion 31, which can ensure that the trigger member 5 is pulled by the gas nozzle 3 to achieve the separation of the pin 52 from the slideway 421; after the trigger is completed, as shown in FIG. Figure 4 As shown, at this time, the pressurizing device is in the triggered state and does not work to release air. Initially, the connecting portion 51 abuts against the limiting portion 31, and a buffer distance is spaced between the pushing portion 53 and the upper end of the air nozzle 3, which can provide an idle stroke for the downward movement of the pushing portion 53, so that after the pressurizing device is triggered, it will not be affected by the external environmental pressure fluctuation and open prematurely; when the container equipped with the pressurizing device has been sold to the customer for use, as shown in FIG. Figure 5 As shown, the trigger member 5 only needs to complete the above-mentioned idle stroke to be able to push the air nozzle 3 to discharge air under the action of the pushing portion 53.

[0032] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope of the appended claims.

[0033] Although this document frequently uses terms such as gas cylinder 1, top cover 2, gas nozzle 3, limiting portion 31, air hole 3a, piston 4, outer sleeve 41, inner sleeve 42, slideway 421, annular groove 43, trigger 5, connecting portion 51, sleeve portion 511, flared opening 5111, pin 52, reinforcement portion 521, inclined surface 5211, push portion 53, and folded portion 54, the use of other terms is not excluded. These terms are used solely to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitations would be contrary to the spirit of the present invention.

Claims

1. A gas pressurizing device for a beverage container, comprising a gas cylinder (1) and a top cover (2) connected to the gas cylinder (1), wherein the gas cylinder (1) is provided with a columnar gas nozzle (3) for controlling gas outlet, a piston (4) is slidably provided in the top cover (2), a trigger member (5) is provided between the piston (4) and the gas nozzle (3), and the trigger member (5) can push the gas nozzle (3) to open under the drive of the piston (4), characterized in that: The trigger member (5) comprises a ring-shaped connecting portion (51), two oppositely arranged and elastic pins (52), and a pushing portion (53); the connecting portion (51) is sleeved on the air nozzle (3) and is slidably connected to the outer peripheral surface of the air nozzle (3); the air nozzle (3) has a limiting portion (31) protruding relative to the outer peripheral surface; the limiting portion (31) is blocked above the connecting portion (51); the two pins (52) are integrally formed or fixed on the upper part of the connecting portion (51); the pushing portion (53) is integrally formed or fixed on the pins (52) and protrudes to one side of the pins (52); the pushing portion (53) is located above the air nozzle (3) and can press the air nozzle (3) downward as the connecting portion (51) moves downward; when the connecting portion (51) abuts against the limiting portion (31), a distance is spaced between the pushing portion (53) and the air nozzle (3).

2. The gas pressurizing device for a beverage container according to claim 1, characterized in that: The pushing portion (53) is plate-shaped and arranged vertically, the vertical projection of the pushing portion (53) is located outside the air hole (3a) of the air nozzle (3), and the pushing portion (53) can abut against the upper end surface of the air nozzle (3).

3. The gas pressurizing device for a beverage container according to claim 2, characterized in that: Each of the pins (52) has two parallel and spaced-apart pushing portions (53), the spacing between the two pushing portions (53) is greater than the aperture of the air hole (3a) of the air nozzle (3), and the air hole (3a) of the air nozzle (3) is located between the two pushing portions (53).

4. The gas pressurizing device for a beverage container according to claim 1, 2 or 3, characterized in that: The middle portion of the connecting portion (51) has a cylindrical sleeve portion (511), and the sleeve portion (511) is sleeved on the outer peripheral surface of the air nozzle (3) and is slidably matched with the outer peripheral surface of the air nozzle (3).

5. The gas pressurizing device for a beverage container according to claim 4, characterized in that: The lower end of the sleeve portion (511) has a trumpet-shaped expansion opening (5111).

6. The gas pressurizing device for a beverage container according to claim 1, 2 or 3, characterized in that: The limiting portion (31) is a convex shoulder integrally formed on the outer peripheral surface of the upper end of the air nozzle (3).

7. The gas pressurizing device for a beverage container according to claim 1, 2 or 3, characterized in that: The connecting portion (51) has two folding portions (54) corresponding to the plug pins (52) in a one-to-one manner. The folding portions (54) are folded upward relative to the connecting portion (51) and are elastic. The folding portions (54) are inclined inward relative to the vertical direction. The lower ends of the plug pins (52) are integrally formed with the folding portions (54) and are inclined outward relative to the vertical direction.

8. The gas pressurizing device for a beverage container according to claim 1, 2 or 3, characterized in that: The piston (4) has a cylindrical outer sleeve (41) at the middle of the lower end, a cylindrical inner sleeve (42) inside the outer sleeve (41), a slideway (421) arranged along the moving direction of the piston (4), an annular groove (43) is formed between the inner circumference of the outer sleeve (41) and the outer circumference of the inner sleeve (42), and the upper end of the pin (52) has a corrugated reinforcement portion (521), the opening of the reinforcement portion (521) facing inward; when the gas pressurizing device is in an untriggered state, the reinforcement portion (521) is located in the slideway (421) and can slide up and down along the slideway (421) relative to the piston (4); when the gas pressurizing device is in a triggered state, the reinforcement portion (521) is stuck in the annular groove (43) and fixed to the piston (4).

9. The gas pressurizing device for a beverage container according to claim 8, characterized in that: The opening edge of the reinforcement portion (521) is provided with a slope (5211) which gradually decreases from top to bottom.

10. The gas pressurizing device for a beverage container according to claim 1, 2 or 3, characterized in that: The inner side of the plug pin (52) has an arc-shaped inner concave surface; the outer side of the plug pin (52) has an arc-shaped outer convex surface.

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