Drinking method of leakage-proof suction nozzle ziplock bag

Abstract

The invention discloses a drinking method of a leakage-proof suction nozzle self-sealing bag. The drinking method is suitable for a suction nozzle packaging bag with self-sealing and anti-overflow functions. The method comprises the following steps: opening the sealing cover; the two pressing unlocking pieces are pressed by two hands to enable the head of the positioning piece to expand outwards, the valve element moves upwards to the high position through sucking, the pressing unlocking pieces are released after the driving piece is ejected out, positioning is completed, and the valve assembly is opened; liquid flows out from the first through hole, the third through hole and the fourth through hole and then flows out from the second through hole for drinking; after drinking is finished, one pressing unlocking piece is pressed down, the driving piece pushes the valve element back to the low position under the elastic effect of the rubber band, and the valve assembly is closed; and finally, covering the sealing cover. The method further has the function of preventing accidental leakage, when the packaging bag is turned over, the positioning piece slides into the release groove from the stopping table due to vibration impact, the driving piece automatically pushes the valve element to the low position, liquid is prevented from flowing out, and automatic sealing is achieved. The cup is convenient to operate, safe, reliable and capable of effectively preventing hot drinks from overflowing and scalding.

Description

[0001] This application is a divisional application of Chinese patent application filed on June 20, 2023, with application number 2023107395275 and invention title "Spit-up Packaging Bag with Self-sealing and Anti-spill Function and Method of Using Thereof". Technical Field

[0002] This invention belongs to the field of food packaging technology, and in particular to a spout packaging bag with self-sealing and spill-proof functions. Background Technology

[0003] Spout pouches are increasingly popular among consumers for their low price and small size when not in use when storing liquids. Different sizes of pouches are widely available on the market; large pouches are suitable for storing water during outdoor travel, while small pouches are suitable for holding breakfast milk, soy milk, etc.

[0004] Application publication number CN 112591292 A discloses a one-handed operation soft-packaged sippy pouch and its sealing mechanism. This invention reveals a sippy pouch and its sealing mechanism, which, through a cleverly designed sealing mechanism in the spout cap, not only allows for convenient and effective sealing of the sippy pouch, but also allows for reliable opening of the sippy pouch with only one hand. After drinking, it can be easily sealed again with one hand. Therefore, it not only provides excellent sealing but is also extremely convenient to use.

[0005] However, current sippy cup pouches still have at least two problems. First, they lack stability when filled with liquid, making them prone to tipping over. If the cap isn't sealed, the liquid will spill. Second, breakfast milk usually needs to be heated, and the soft pouch body makes it easy to compress when opening, causing the milk inside to be squeezed out and spill, potentially burning your hands.

[0006] Therefore, a new type of spout packaging bag is needed that can solve these two problems, making it safer and more practical. Summary of the Invention

[0007] To address the aforementioned problems, this invention provides a spout packaging bag with self-sealing and spill-proof functions. It was developed in view of the problems of conventional packaging bags, and its structural and functional features can overcome the aforementioned shortcomings of the prior art.

[0008] The objective of this invention is achieved through the following technical solution: A spout packaging bag with self-sealing and spill-proof functions, suitable for holding hot or cold drinks, comprising: a soft bag body, a spout body fixedly connected to one side of the opening of the bag body, a cap, and a valve assembly disposed inside the spout body. When the liquid contents are heated to a set temperature, the cap is opened, and the internal automatic sealing structure is activated, so that even if the drinker squeezes the bag, the liquid will not overflow, thus achieving the automatic sealing function.

[0009] Preferably, the valve assembly includes: a valve seat integrally formed with the nozzle body, a backstop component fixed to the bottom surface of the valve seat, a valve core movably mounted on the valve seat and capable of sliding up and down tightly relative to the valve seat, and a tensioning ring provided in the sliding portion between the valve seat and the valve core.

[0010] Preferably, the valve core includes a bottommost anti-reverse fitting part, the inner ring of the anti-reverse fitting part extends upward to form a movable fitting part, the diameter of the movable fitting part is larger than that of the anti-reverse fitting part, and a step surface driving receiving part is formed between the two. Near the lower edge of the movable fitting part, a first through hole is arranged in an array around its circumference, while a second through hole is arranged in an array on the step surface.

[0011] Preferably, the valve seat has a main fluid channel at its center, and the sidewalls of the main fluid channel form a first ring. Adjacent to the first ring is a second ring. The upward-facing ends of the first and second rings are open, and the downward-facing ends are integrally formed or thermally bonded to the nozzle body, respectively. A gap is left between the first and second rings, with the upper end open and the lower end closed. The gap is relatively small in the upper part and relatively large in the lower part. A ring of third through holes is arranged in an annular array on the circumference of the sidewall of the second ring, and a ring of fourth through holes is arranged in an annular array on the circumference of the first ring. The center positions of the third and fourth through holes are at the same height.

[0012] Preferably, the nozzle body includes a joint portion that mates with the cap, a ring body with a certain wall thickness below the joint portion, a transition body that connects with the body below the ring body, and an installation hole with an inclined direction that is lower on the inside and higher on the outside on both sides of the width direction of the bag body.

[0013] Preferably, the packaging bag further includes: self-sealing components disposed on the outside of the nozzle body and located on both sides of the width direction of the bag body. The self-sealing components include a drive member that can slide tightly in the mounting hole and has rounded surfaces at both ends. The mounting hole is provided with a guide boss to prevent the drive member from rotating. The drive member is provided with a groove that matches the guide boss. The guide boss and the drive member are connected by a rubber band.

[0014] Preferably, the self-sealing component also includes a positioning component disposed below the driving component and a press-to-unlock component fixedly disposed in the middle of the positioning component. A platform is provided at the junction of the annular body and the transition body. A release groove with a slope that is lower at the far end and higher at the near end is provided on the platform facing the driving component. A docking platform is provided at the part of the release groove adjacent to the annular body.

[0015] Preferably, the upper end of the positioning component has a bevel, and the lower end is thicker than other parts. The bottom contact surface of the lower end is located on the docking platform. The upper bevel has an arc in the width direction, which matches the outer circumference of the driving component. A connector for movably connecting the positioning component is fixedly provided on the annular body near the upper end of the positioning component. The two have a large fitting gap in all directions. The overall height of the positioning component is set so that when the driving component slides outward, the highest point of the bevel of the positioning component can abut against the outer surface of the driving component.

[0016] Preferably, the positioning element is made of a plastic part with resilience.

[0017] To address the aforementioned problems, this invention also provides a drinking method for the aforementioned spout packaging bag. The objective of this invention is achieved through the following technical solution: The steps are as follows: a. Open the seal; b. Open the valve assembly: Press down on the two push-to-unlock parts with both hands to expand the heads of the two positioning parts outward, eliminating the resistance to the driving parts. The drinker sucks to move the valve core to the high position and pushes the two driving parts outward against the elasticity of the rubber band. Release the two push-to-unlock parts with your fingers, and the two driving parts will be positioned by the two positioning parts respectively. c. Drinking: At this time, the valve assembly is in the open state, and the liquid flows out from the first through hole, through the third and fourth through holes, and then out from the second through hole; d. End of drinking: When you have finished drinking, press one of the push-to-unlock mechanisms. The actuator will push the valve core back to the low position under the elastic force of the rubber band, thus closing the valve assembly. e. Sealing the packaging bag: After the valve assembly is closed, the cap can be put back on the nozzle body to keep the liquid inside the packaging bag fresh; f. Preventing accidental leakage: If the mouthpiece packaging bag is not emptied and the valve assembly is not closed or sealed in time, when it is overturned, the positioning part is subjected to vibration and impact, and slides from the dock into the release groove, eliminating the resistance to the driving part. Under the action of the rubber band, the driving part quickly moves into the mouthpiece body, pushing the valve core to the low position, blocking the outward flow of liquid, thereby realizing the automatic sealing function.

[0018] In summary, the present invention has the following advantages compared with the prior art: 1. Self-sealing function: The packaging bag has an automatic sealing function, which can prevent liquid leakage in the event of accidental tipping or failure to close the valve assembly and cap in time, thereby reducing the risk during use.

[0019] 2. Convenient opening and closing mechanism: With the design of the press-to-unlock and positioning parts, users can easily open and close the valve assembly for a smooth drinking experience.

[0020] 3. Safety: The valve assembly is designed to ensure that the valve will not open when the liquid is heated to a high temperature, thus protecting the user from being scalded.

[0021] 4. Keep the liquid fresh: The double-closure design of the cap and valve assembly better keeps the liquid inside the packaging bag fresh and extends the product's shelf life.

[0022] In summary, this spout packaging bag offers advantages such as self-sealing, convenient opening and closing mechanisms, safety, and preservation of liquid freshness, providing users with a comfortable drinking experience. Furthermore, its flexibility in use, portability, and ease of storage make it a unique and practical packaging product on the market. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 The structural diagram of the bag body is hidden in this invention; Figure 3 yes Figure 2 A magnified view of a section at point A in the middle; Figure 4 This is a structural diagram showing the nozzle body after it has been cut open to facilitate viewing the internal assembly. Figure 5 This is an exploded view of the components of the present invention; Figure 6 The front view of the bag body and the sealed cap is hidden for the present invention; Figure 7 for Figure 6 Full sectional perspective view at point AA; Figure 8 This is a three-dimensional view of the valve core; Figure 9 for Figure 8 Full sectional perspective view at point BB.

[0024] The following components are marked in the diagram: Bag body 1, Nozzle body 2, Cap 3, Valve assembly 4, Valve seat 41, Valve core 43, Tensioning ring 5, Anti-reverse fitting part 431, Moving fitting part 432, Step surface 001, Drive receiving part 433, First through hole 002, Second through hole 003, Fluid main channel 411, First ring 412, Second ring 413, Joint 21, Ring body 22, Transition body 23, Mounting hole 006, Self-sealing assembly 6, Drive component 61, Guide boss 63, Rubber band 62, Positioning component 64, Press unlocking component 65, Platform 211, Release groove 212, Stopping platform 213, Connector 221. Detailed Implementation

[0025] The present invention will be further described below with reference to the embodiments illustrated in the accompanying drawings: Example 1 like Figure 1-2 As shown in Figure 5, a spout packaging bag with self-sealing and spill-proof functions is suitable for holding hot or cold drinks. When the lid is not closed, the opening will automatically seal immediately after being turned over to prevent liquid leakage. At the same time, when the contents of the bag are heated to the set temperature, opening the lid will activate the internal automatic sealing structure, so that even if the drinker squeezes the bag, the liquid will not spill.

[0026] The packaging bag structure includes: a soft bag body 1 made of food-grade material, capable of withstanding high and low temperatures; a mouthpiece body 2 fixedly connected to the opening side of the bag body 1 for easy sipping; a cap 3 to protect the mouthpiece body 2 from dust and contamination; and a valve assembly 4 located inside the mouthpiece body 2 for automatic sealing.

[0027] The valve assembly 4 includes: a valve seat 41 integrally formed with the nozzle body 2, a backstop component fixed to the bottom surface of the valve seat 41, and a valve core 43 movably mounted on the valve seat 41 and capable of sliding up and down tightly relative to the valve seat 41 to achieve an automatic sealing function.

[0028] A tension ring 5 is provided in the sliding part between the valve seat 41 and the valve core 43. The tension ring 5 is made of a heat-sensitive material, and its thermal expansion range is set so that it can limit the sliding of the valve core 43 when the temperature exceeds 60 degrees Celsius. This design ensures that the tension ring 5 expands due to heat during the heating process, thereby limiting the sliding of the valve core 43 and further ensuring the safety of the drinker.

[0029] Please refer to the following for the specific structure of valve core 43. Figure 8-9The valve core 43 includes a bottommost annular plate-shaped anti-reverse fitting portion 431, the inner ring of which extends upward to form a movable fitting portion 432. The diameter of the movable fitting portion 432 is larger than that of the anti-reverse fitting portion 431, and a drive receiving portion 433 with a stepped surface 001 is formed between them. Near the lower edge of the movable fitting portion 432, a first through hole 002 is arranged in a ring around its circumference, while a second through hole 003 is arranged in an array on the stepped surface 001.

[0030] Please refer to the following for the specific structure of valve seat 41. Figure 5 The valve seat 41 has a circular fluid main channel 411 at its center, and the sidewalls of the fluid main channel 411 form a first ring 412. Adjacent to the first ring 412 is a second ring 413. The upward-facing ends of the first ring 412 and the second ring 413 are open, while the downward-facing ends are integrally formed with or thermally bonded to the nozzle body 2. A gap exists between the first ring 412 and the second ring 413, open at the upper end and closed at the lower end. The upper portion of the gap is relatively small, used to accommodate the moving mating part 432; the lower portion of the gap is relatively large, used to accommodate the anti-reverse mating part 431. A ring of third through holes is arranged in an annular array on the circumferential surface of the sidewall of the second ring 413, while a ring of fourth through holes is arranged in an annular array on the circumferential surface of the first ring 412. The center positions of the third and fourth through holes are at the same height.

[0031] Please refer to the following for the fit between valve core 43 and valve seat 41. Figure 7 . Figure 7 This display shows the state when valve core 43 is in the upper position. In this state, the first through hole 002 is connected to the third and fourth through holes. When the user inhales, the negative pressure causes the liquid to flow from the first through hole 002 through the third and fourth through holes, and then out through the second through hole 003.

[0032] When the liquid is not heated to the set temperature, it is safe to drink. When the liquid is heated to the set temperature, the tension ring 5 expands due to heat, which restricts the sliding of the valve core 43, prevents the liquid from overflowing, and ensures the safety of the drinker.

[0033] like Figure 4 As shown, the nozzle body 2 includes a joint 21 that mates with the cap 3. Below the joint 21 is a ring 22 with a certain wall thickness. Below the ring 22 is a transition body 23 that connects to the body 1. The ring 22 has a mounting hole 006 on each side of the bag body 1 in the width direction, with the inner side lower than the outer side. The packaging bag also includes a self-sealing component 6 disposed on the outside of the nozzle body 2 and located on both sides of the bag body 1 in the width direction.

[0034] The self-sealing assembly 6 includes a drive member 61, which is mounted in a mounting hole 006 and can slide tightly, with both ends having rounded surfaces. A guide boss 63 is provided in the mounting hole 006 to prevent rotation of the drive member 61, and the drive member 61 has a groove that matches the guide boss. The guide boss and the drive member 61 are connected by a rubber band 62. Under normal conditions, the rubber band 62 causes the rounded surface of the lower end of the drive member 61 to press against the upper edge of the drive receiving part 433. The elasticity of the rubber band 62 causes the valve core 43 to fall into a low position, that is, the position where the moving mating part 432 has no hole is between the third and fourth through holes, thereby cutting off the connection between them.

[0035] The self-closing assembly 6 also includes a positioning element 64 disposed below the drive element 61 and a press-to-unlock element 65 fixedly disposed in the middle of the positioning element 64. A platform 211 is provided at the junction of the annular body 22 and the transition body 23. A release groove 212 with a slope that is lower at the far end and higher at the near end is provided on the platform 211 directly opposite the drive element 61. A resting platform 213 is provided immediately adjacent to the annular body 22 at the part of the release groove 212. Under normal conditions, the positioning element 64 is movably positioned between the resting platform 213 and the drive element 61. Please refer to [reference needed] for the structure of the positioning element 64. Figure 3 The upper end has a sloping surface, and the lower end is thicker than other parts. The bottom contact surface of the lower end is located on the docking platform 213. The upper sloping surface has an arc in the width direction, which matches the outer circumference of the driving component 61. A connecting component 221 for movably connecting the positioning component 64 is fixedly provided on the upper end of the annular body 22 near the positioning component 64. The two have a large fitting clearance in all directions. The overall height of the positioning component 64 is set so that when the driving component 61 slides outward, the highest point of the sloping surface of the positioning component 64 can abut against the outer surface of the driving component 61.

[0036] When not in use, the inclined surface of the positioning element 64 abuts against the arc surface of the upper end of the driving element 61. The positioning element 64 is made of a resilient plastic part. To open the drinking area, press both pressing unlocking elements 65 simultaneously. The heads of both positioning elements 64 expand outwards, no longer resisting the driving element 61. The drinker sucks (while simultaneously pressing the bag body 1), causing the internal liquid to move the valve core to the high position. At the same time, the valve core pushes the two driving elements 61 outwards against the elasticity of the rubber band. At this point, releasing the two pressing unlocking elements 65 will position the two driving elements 61 separately by the two positioning elements 64, allowing for easy and smooth sucking afterwards. To close the valve assembly 4, simply press one of the pressing unlocking elements 65. The driving element 61, through the elasticity of the rubber band, pushes the valve core back to the low position.

[0037] If the liquid inside the mouthpiece packaging bag is not completely consumed, and the valve assembly 4 is not closed or the cap 3 is not applied in time, the mouthpiece packaging bag may tip over. Due to its structure, the wider side of the bag will face downwards. At this time, the positioning member 64 in the corresponding direction will be subjected to vibration and impact. Under the action of vibration and its own weight, the lower end face of the positioning member 64 slides from the dock 213 into the release groove 212, eliminating the resistance of the positioning member 64 to the driving member 61. Under the action of the rubber band, the driving member 61 quickly moves into the mouthpiece body 2, thereby pushing the valve core 43 to a low position and blocking the outward flow of liquid.

[0038] This automatic sealing function effectively prevents liquid leakage when the packaging bag is tipped over, improving the practicality of the spout packaging bag. Combined with the aforementioned valve assembly and self-sealing assembly, the spout packaging bag provides users with a more convenient and safer drinking experience. Indeed, if the overall volume of the spout packaging bag is small, or if the vibration when tipped over is minimal, the positioning element 64 may not be triggered, which is one of the limitations of this invention. To solve this problem, the following improvements can be considered: 1. Adjust the design of the positioning element 64 and the release groove 212 so that they can be triggered even with less vibration. For example, reduce the slope angle of the release groove 212 to make it easier for the positioning element 64 to slide into the release groove.

[0039] 2. Increase sensitivity: A more sensitive triggering mechanism, such as a spring or magnetic element, can be added to the positioning element 64 or the release groove 212 to ensure that the positioning element 64 can be triggered even with small vibrations.

[0040] 3. Add a gravity sensor: Install a gravity sensor in the nozzle packaging bag. When it detects that the bag has tipped over, it will automatically trigger the positioning component 64 to achieve automatic sealing.

[0041] 4. Add a tilt switch: Install a tilt switch in the nozzle packaging bag. When tipping is detected, the positioning component 64 is automatically triggered, thereby achieving automatic sealing.

[0042] The above improvement schemes can be selected and optimized according to actual needs and manufacturing costs to improve the self-sealing performance of spout packaging bags under different conditions.

[0043] Based on the design and self-sealing function of the above-mentioned spout packaging bag, the following are the drinking instructions: 1. Open the seal 3.

[0044] 2. Opening the valve assembly: Press both release buttons 65 with both hands to expand the heads of the two positioning members 64 outward, eliminating their resistance to the drive member 61. The drinker sucks (while sucking, the bag body 1 can be pressed), causing the valve core 43 to move to the high position and pushing the two drive members 61 outward against the elasticity of the rubber band. Releasing the two release buttons 65 will position the two drive members 61 respectively by the two positioning members 64.

[0045] 3. Drinking: At this time, valve assembly 4 is in the open position, allowing the drinker to easily drink the liquid inside the packaging bag. The liquid flows out from the first through hole 002, through the third and fourth through holes, and then out from the second through hole 003.

[0046] 4. End of drinking: When drinking is finished, press one of the pressing unlocking parts 65. The driving part 61 pushes the valve core 43 back to the low position under the elastic force of the rubber band, realizing the closure of the valve assembly 4.

[0047] 5. Sealing the packaging bag: After the valve assembly 4 is closed, if necessary, the cap 3 can be put back on the nozzle body 2 to keep the liquid inside the packaging bag fresh.

[0048] 6. Prevention of accidental leakage: If the mouthpiece packaging bag is not emptied and the valve assembly 4 is not closed or the cap 3 is not applied in time, when it is tipped over, the positioning part 64 will be subjected to vibration and impact, sliding from the dock 213 into the release groove 212, eliminating the resistance to the drive part 61. Under the action of the rubber band, the drive part 61 will quickly move into the mouthpiece body 2, pushing the valve core 43 to the lower position, blocking the outward flow of liquid, thereby realizing the automatic sealing function.

[0049] This drinking method allows users to easily and conveniently drink the liquid inside the spout packaging, while the self-sealing function effectively prevents liquid leakage in case of accidental spills or other unforeseen circumstances.

[0050] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A method for drinking from a leak-proof self-sealing bag with a sippy nozzle, characterized in that, The sippy bag includes: a soft bag body (1), a sippy body (2) fixedly connected to the opening side of the bag body (1), and a cap (3). It is characterized in that it also includes a valve assembly (4) disposed inside the sippy body (2). When the liquid contents are heated to a set temperature, the cap is opened and the internal automatic sealing structure is activated, so that even if the drinker squeezes the bag, the liquid will not spill out, thus achieving the automatic sealing function. The valve assembly (4) includes: a valve seat (41) integrally formed with the nozzle body (2), a backstop component fixed to the bottom surface of the valve seat (41), a valve core (43) movably mounted on the valve seat (41) and capable of sliding up and down tightly relative to the valve seat (41), and a tension ring (5) provided in the sliding part between the valve seat (41) and the valve core (43); the tension ring (5) is made of a heat-sensitive material, and during the heating process, the tension ring (5) expands due to heat, thereby restricting the sliding of the valve core (43); it also includes a self-sealing assembly (6) provided outside the nozzle body (2), the self-sealing assembly (6) including a slidable drive component (61), a rubber band (62) connected to the drive component (61), a positioning component (64) and a press-to-unlock component (65), and a docking platform (213) and a release groove (212) provided on the nozzle body (2); The steps for drinking it are as follows: a. Open the lid (3); b. Open the valve assembly: Press down on the two push-to-unlock parts (65) with both hands to make the heads of the two positioning parts (64) expand outward, eliminating the resistance to the driving part (61). The drinker sucks to move the valve core (43) to the high position and push the two driving parts (61) outward against the elasticity of the rubber band. Release the two push-to-unlock parts (65) with your fingers, and the two driving parts (61) will be positioned by the two positioning parts (64) respectively. c. Drinking: At this time, the valve assembly (4) is in the open state, and the liquid flows out from the first through hole (002), through the third through hole and the fourth through hole, and then from the second through hole (003); d. End of drinking: When drinking is finished, press one of the pressing unlocking parts (65), and the driving part (61) will push the valve core (43) back to the low position under the elastic force of the rubber band, so as to close the valve assembly (4); e. Closing the packaging bag: After the valve assembly (4) is closed, the cap (3) can be put back on the nozzle body (2) to keep the liquid in the packaging bag fresh; f. Preventing accidental leakage: If the mouthpiece packaging bag is not emptied and the valve assembly (4) is not closed or the cap (3) is not applied in time, when it is overturned, the positioning part (64) is subjected to vibration and impact, and slides from the dock (213) into the release groove (212), eliminating the resistance to the driving part (61). Under the action of the rubber band, the driving part (61) moves quickly into the mouthpiece body (2), pushing the valve core (43) to the low position, blocking the outward flow of liquid, thereby realizing the automatic sealing function.

2. The method for drinking from a leak-proof self-sealing bag with a sippy nozzle according to claim 1, characterized in that, The valve core (43) includes a bottommost anti-reverse fitting part (431). The inner ring of the anti-reverse fitting part (431) extends upward to form a moving fitting part (432). The diameter of the moving fitting part (432) is larger than that of the anti-reverse fitting part (431). A drive receiving part (433) with a stepped surface (001) is formed between the two. Near the lower edge of the moving fitting part (432), a first through hole (002) is arranged in a ring on its circumference, while a second through hole (003) is arranged in an array on the stepped surface (001).

3. The method for drinking from a leak-proof self-sealing bag with a sippy nozzle according to claim 2, characterized in that, The valve seat (41) has a fluid main channel (411) at its center. The sidewall of the fluid main channel (411) forms a first ring (412). Adjacent to the first ring (412) is a second ring (413). The upper end of the first ring (412) and the second ring (413) are open, and the lower end is integrally formed or thermally joined with the nozzle body (2). There is a gap between the first ring (412) and the second ring (413), with the upper end open and the lower end closed. The gap is relatively small in the upper part and relatively large in the lower part. A ring of third through holes is arranged in an annular array on the sidewall of the second ring (413), and a ring of fourth through holes is arranged in an annular array on the sidewall of the first ring (412). The center positions of the third through holes and the fourth through holes are at the same height.

4. The method for drinking from a leak-proof self-sealing bag with a sippy nozzle according to claim 1, characterized in that, The nozzle body (2) includes a joint (21) that mates with the cap (3). Below the joint (21) is a ring (22) with a certain wall thickness. Below the ring (22) is a transition body (23) that connects with the bag body (1). The ring (22) has a mounting hole (006) on each side of the width direction of the bag body (1) with the inner side lower than the outer side.

5. The method for drinking from a leak-proof self-sealing bag with a sippy nozzle according to claim 4, characterized in that, It also includes self-sealing components (6) disposed outside the mouthpiece body (2) and located on both sides of the bag body (1) in the width direction. The self-sealing components (6) include a drive member (61) that can slide tightly in the mounting hole (006) and has rounded surfaces at both ends. The mounting hole (006) is provided with a guide boss (63) to prevent the drive member (61) from rotating. The drive member (61) is provided with a groove that matches the guide boss (63). The guide boss (63) and the drive member (61) are connected by a rubber band (62).

6. The method for drinking from a leak-proof self-sealing bag with a sippy nozzle according to claim 5, characterized in that, The self-sealing component (6) also includes a positioning component (64) disposed below the driving component (61) and a pressing unlocking component (65) fixedly disposed in the middle of the positioning component (64). A platform (211) is provided at the junction of the annular body (22) and the transition body (23). A release groove (212) with a slope that is lower at the far end and higher at the near end is provided on the platform (211) facing the driving component (61). A docking platform (213) is provided on the part of the release groove (212) adjacent to the annular body (22).

7. The method for drinking from a leak-proof self-sealing bag with a sippy spout according to claim 6, characterized in that, The upper end of the positioning member (64) has a slope, and the lower end is thicker than other parts. The bottom contact surface of the lower end is located on the docking platform (213). The upper slope has an arc in the width direction, which matches the outer circumference of the driving member (61). A connector (221) for movably connecting the positioning member (64) is fixed on the upper end of the ring body (22) near the positioning member (64). The two have a large fitting gap in all directions. The overall height of the positioning member (64) is set so that when the driving member (61) slides outward, the highest point of the slope of the positioning member (64) can abut against the outer surface of the driving member (61).

8. The method for drinking from a leak-proof self-sealing bag with a sippy spout according to claim 6 or 7, characterized in that, The positioning element (64) is made of a plastic part with elastic properties.

9. The method for drinking from a leak-proof self-sealing bag with a sippy nozzle according to claim 1, characterized in that, The thermal expansion range of the tensioning ring (5) is set so that it can limit the slippage of the valve core (43) when the temperature exceeds 60 degrees.

10. The method for drinking from a leak-proof self-sealing bag with a sippy nozzle according to claim 1, characterized in that, In step b, the drinker can press the bag body (1) while sucking to help the liquid move the valve core (43) upward.

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