Cup cover sealing structure of vacuum cup

Abstract

The utility model discloses a cup lid sealing structure of a vacuum cup, which comprises a cup lid, a valve core and a sealing ring, the cup lid comprises an upper lid and a lower lid, and the lower lid is provided with a water outlet; a breathable film is arranged on the valve core; the sealing ring is used for connecting the valve core to the upper cover and sealing the water outlet when the upper cover and the lower cover are mutually covered; wherein the sealing ring comprises an inner ring and an outer ring, the inner ring is connected with the valve core, the outer ring is connected with the upper cover, and a deformation groove for providing a deformation space for the sealing ring is arranged between the inner ring and the outer ring. Therefore, the deformation groove endows the sealing ring with a controllable elastic deformation space when the sealing ring is pressed, and under the condition that the air pressure in the cup rises due to blockage of the breathable film, the valve element can jack up upwards under the action of the internal pressure of the vacuum cup to drive the sealing ring to deform, so that a gap is formed between the sealing ring and the water outlet of the lower cover, and therefore steam pressure is released; the cup cover is prevented from being opened due to too high internal pressure, the safety performance of the vacuum cup under high-temperature impact is improved, and then the reliable emergency pressure relief function is achieved.

Description

A sealing structure for the lid of a thermos cup Technical Field

[0001] This utility model relates to the field of thermos cup technology, specifically to a sealing structure for the lid of a thermos cup. Background Technology

[0002] Existing insulated cups typically have a breathable membrane inside the lid to balance the air pressure inside and outside the cup, preventing abnormal pressure increases caused by the accumulation of hot water vapor. However, when the breathable membrane becomes clogged due to long-term use, dirt accumulation, or structural aging, the internal air pressure cannot be released in time. This can easily cause a sudden pressure surge when the cup is inverted or shaken violently, potentially leading to dangerous situations such as the lid being forced open and hot steam being ejected, posing a significant safety hazard.

[0003] In addition, although some products have certain pressure relief structures, they still have shortcomings in terms of pressure relief response speed, sealing reliability or structural stability, making it difficult to effectively avoid the risk of cap rupture in extreme situations, and the safety of use still needs to be improved. Summary of the Invention

[0004] To overcome the defects described in the prior art, this utility model provides a sealing structure for the lid of a thermos cup. The deformation groove provides the sealing ring with controllable elastic deformation space under pressure. When the gas pressure inside the thermos cup increases due to blockage of the vent membrane, the valve core is pushed upward under the internal pressure of the thermos cup, causing the sealing ring to deform. This creates a gap between the sealing ring and the water outlet of the lower lid, thereby releasing steam pressure and preventing the lid from being pushed open due to excessive internal pressure. This improves the safety performance of the thermos cup under high temperature impact and achieves a reliable emergency pressure relief function.

[0005] The technical solution adopted by this utility model to solve its problem is:

[0006] A sealing structure for the lid of a thermos cup includes:

[0007] A cup lid, comprising an upper lid and a lower lid, wherein the lower lid is provided with a water outlet;

[0008] Valve core, wherein a breathable membrane is provided on the valve core;

[0009] A sealing ring is used to connect the valve core to the upper cover and to seal the outlet when the upper cover and the lower cover are closed together.

[0010] The sealing ring includes an inner ring and an outer ring. The inner ring is connected to the valve core, and the outer ring is connected to the upper cover. A deformation groove is provided between the inner ring and the outer ring to provide deformation space for the sealing ring.

[0011] Furthermore, the upper cover is provided with a protrusion, and a through hole is formed on the protrusion;

[0012] The bottom of the outer ring is integrally formed with the bottom of the inner ring. The outer ring is sleeved on the outer side wall of the protrusion, and the bottom of the protrusion, the inner bottom of the outer ring, and the outer side wall of the inner ring surround to form the deformation groove.

[0013] The inner ring extends into the through hole and is fitted onto the outside of the valve core.

[0014] Furthermore, the upper cover is provided with a step surrounding the protrusion, and when the outer ring is fitted onto the outer side wall of the protrusion, the top of the outer ring abuts against the step.

[0015] Furthermore, the outer wall of the valve core is provided with a first groove, and the inner ring is provided with a first protrusion;

[0016] When the inner ring is fitted onto the valve core, the first protrusion engages within the first groove.

[0017] Furthermore, the valve core is provided with a second protrusion at its bottom, and the inner ring is provided with a second groove; when the inner ring is fitted onto the valve core, the second protrusion is engaged in the second groove.

[0018] Furthermore, the outlet is provided with an arc surface, and the bottom of the outer ring is provided with an arc surface that matches the arc surface.

[0019] Furthermore, it also includes a cover plate connected to the upper cover, and an air vent is provided between the cover plate and the upper cover.

[0020] Furthermore, the upper cover has a slot, the cover plate has a block, and the block has a notch;

[0021] When the cover plate is connected to the upper cover, the locking block engages with the locking groove, and the notch and the upper cover enclose the air outlet that communicates with the through hole.

[0022] Furthermore, the upper cover and the lower cover are connected by a hinge, and the hinged part is provided with an elastic element that provides elastic force when the upper cover is opened relative to the lower cover.

[0023] Furthermore, the upper cover is also provided with a first latch, and the lower cover is also provided with a second latch that cooperates with the first latch;

[0024] When the upper cover is placed on the lower cover, the first latch and the second latch engage with each other.

[0025] In summary, this utility model has the following technical effects:

[0026] 1. The sealing structure of the thermos cup lid of this utility model has a deformation groove that provides the sealing ring with controllable elastic deformation space under pressure. When the gas pressure inside the thermos cup increases due to blockage of the breathable membrane, the valve core is pushed upward under the internal pressure of the thermos cup, causing the sealing ring to deform. This creates a gap between the sealing ring and the water outlet of the lower lid, thereby releasing the steam pressure and preventing the lid from being pushed open due to excessive internal pressure. This improves the safety performance of the thermos cup under high temperature impact and achieves a reliable emergency pressure relief function.

[0027] 2. The sealing structure of the thermos cup lid of this utility model not only improves the sensitivity of pressure relief response, but also takes into account the sealing effect and structural stability, overcoming the shortcomings of existing thermos cups in terms of insufficient safety performance under extreme working conditions, and has good practical value and promotion prospects. Attached Figure Description

[0028] Figure 1 is a schematic diagram of the cup lid sealing structure of this utility model installed on the cup body;

[0029] Figure 2 is a cross-sectional schematic diagram of the cup lid sealing structure of this utility model installed on the cup body;

[0030] Figure 3 is a schematic diagram of the upper cover from one perspective in the cup lid sealing structure of this utility model;

[0031] Figure 4 is a schematic diagram of the upper cover from a second perspective in the cup lid sealing structure of this utility model;

[0032] Figure 5 is a schematic diagram of the valve core in the cup lid sealing structure of this utility model;

[0033] Figure 6 is a schematic diagram of the sealing ring in the cup lid sealing structure of this utility model;

[0034] Figure 7 is a cross-sectional schematic diagram of the sealing ring in the cup lid sealing structure of this utility model;

[0035] Figure 8 is a schematic diagram of the cover plate in the cup lid sealing structure of this utility model.

[0036] Figure 9 is a cross-sectional schematic diagram of another embodiment;

[0037] Figure 10 is a schematic diagram of the sealing ring 6A from one perspective in another embodiment;

[0038] Figure 11 is a cross-sectional view of the sealing ring 6A from another embodiment;

[0039] Figure 12 is a cross-sectional schematic diagram of the sealing ring 6A in another embodiment;

[0040] Figure 13 is a schematic diagram of the structure of valve core 5A in another embodiment.

[0041] The meanings of the reference numerals in the attached figures are as follows:

[0042] 1. Lower cover; 11. Outlet; 12. Curved surface; 13. Second latch; 2. Upper cover; 21. Protrusion; 22. Through hole; 23. Step; 24. First latch; 241. Button; 25. Return spring; 26. Slot; 3. Cover plate; 31. Locking block; 32. Notch; 33. Air outlet; 4. Breathable membrane; 5. Valve core; 51. Main flow hole; 52. First groove; 53. Second protrusion; 54. Recess; 6. Sealing ring; 61. Inner ring; 611. First protrusion; 612. Second groove; 62. Outer ring; 621. Curved surface; 63. Deformation groove; 7. Elastic element; 8. Cup body. Detailed Implementation

[0043] To better understand and implement this invention, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings.

[0044] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the module or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0046] Example 1

[0047] As shown in Figures 1-8, a sealing structure for a thermos cup lid includes a lid, a valve core 5, and a sealing ring 6. The lid includes an upper cover 2 and a lower cover 1. The lower cover 1 has a water outlet 11 for water discharge. The valve core 5 has a recess 54 and a main vent 51 for steam discharge. The recess 54 is covered with a breathable membrane 4. The breathable membrane 4 can effectively discharge the steam generated inside the thermos cup to balance the air pressure inside and outside the cup body 8, while also having good waterproof performance to prevent liquid leakage.

[0048] The sealing ring 6 is used to fix the valve core 5 to the upper cover 2 and to seal the outlet 11 of the lower cover 1 when the upper cover 2 and the lower cover 1 are closed, thereby effectively preventing liquid leakage. Specifically, the sealing ring 6 includes an inner ring 61 and an outer ring 62. The inner ring 61 is sealed to the valve core 5, and the outer ring 62 is fitted to the upper cover 2. A deformation groove 63 is provided between the inner ring 61 and the outer ring 62 to provide space for elastic deformation. By setting the deformation groove 63, the sealing ring 6 can undergo controlled deformation when subjected to the steam pressure inside the thermos cup. While ensuring the sealing performance under normal sealing conditions, it also provides a buffer space for the upward movement of the valve core 5 under special circumstances, thereby enhancing the pressure relief response capability of the cup lid structure.

[0049] When the breathable membrane 4 becomes blocked and the internal air pressure of the thermos cup continues to rise, this structure can effectively release some of the internal pressure through the elastic deformation of the sealing ring 6, thereby avoiding safety hazards such as the lid being pushed open due to abnormal air pressure rise, and significantly improving the safety and structural reliability of the thermos cup in high-temperature environments.

[0050] Specifically, the deformation groove 63 in the sealing ring 6 provides controllable elastic deformation space. This allows the internal pressure to push the valve core 5 upwards in extreme situations where the vent membrane 4 is blocked and steam cannot escape from the thermos in time. This causes the sealing ring 6 to undergo restricted deformation, creating a gap between the sealing ring 6 and the outlet 11 of the lower cover 1, thus enabling timely steam release. This structural design ensures a good seal during normal use and achieves automatic pressure relief under extreme conditions, effectively preventing the lid from being forced open due to excessive pressure, thus improving the thermos's emergency protection capabilities and overall safety performance.

[0051] Referring to Figures 3-4, the upper cover 2 is provided with a protrusion 21, and a through hole 22 is provided on the protrusion 21; the bottom of the outer ring 62 is integrally formed with the bottom of the inner ring 61, the outer ring 62 is sleeved on the outer side wall of the protrusion 21, and the bottom of the protrusion 21, the inner bottom of the outer ring 62 and the outer side wall of the inner ring 61 form a deformation groove 63; the inner ring 61 extends into the through hole 22 and is sleeved on the outer side of the valve core 5.

[0052] In the event of blockage of the breathable membrane 4, leading to an abnormal increase in air pressure inside the thermos, the deformation groove 63 provides an effective deformation space for the sealing ring 6, allowing the sealing ring 6 to undergo controlled deformation under air pressure. At the same time, the valve core 5 moves upward under the push of internal pressure and slides axially in the through hole 22, causing a gap to form between the sealing ring 6 and the water outlet 11 of the lower cover 1, thereby realizing the automatic release of steam pressure, avoiding dangerous situations such as the lid being opened due to air pressure accumulation, and improving the overall safety and reliability of the sealing structure.

[0053] Furthermore, the upper cover 2 is provided with a step 23 surrounding the outer side of the protrusion 21. When the outer ring 62 of the sealing ring 6 is fitted onto the outer wall of the protrusion 21, its top can abut against the step 23, thereby forming a predetermined gap space between the bottom of the protrusion 21 and the bottom of the outer ring 62, which together with the inner ring 61 encloses a deformation groove 63. The deformation groove 63 can provide an effective elastic buffer space for the sealing ring 6 when the internal air pressure changes, allowing the sealing ring 6 to undergo controlled deformation, thereby enhancing the adaptability of the sealing structure to pressure fluctuations and improving its sealing stability and safety under high temperature or high pressure conditions.

[0054] Referring to Figures 5-7, the outer wall of the valve core 5 is provided with a first groove 52, and the inner ring 61 is provided with a first protrusion 611; when the inner ring 61 is fitted onto the valve core 5, the first protrusion 611 is engaged in the first groove 52.

[0055] The valve core 5 is provided with a second protrusion 53 at the bottom and a second groove 612 on the inner ring 61. When the inner ring 61 is fitted onto the valve core 5, the second protrusion 53 is engaged in the second groove 612.

[0056] The inner ring 61 of the sealing ring 6 is engaged with the first groove 52 on the valve core 5 through the first protrusion 611 and the second groove 612 is engaged with the second protrusion 53 on the valve core 5. This not only enhances the connection between the inner ring 61 of the sealing ring 6 and the outer wall of the valve core 5, preventing loosening or displacement during air pressure impact or frequent opening and closing, but also further improves the stability and durability of the overall sealing structure, effectively ensuring the sealing reliability in high temperature, high pressure and other working environments.

[0057] Furthermore, the outlet 11 of the lower cover 1 is provided with an arc surface 12 structure, and the bottom of the outer ring 62 of the sealing ring 6 is provided with an arc surface 621 that matches the arc surface 12. Through the precise fit between the arc surfaces 621, a tighter contact interface can be formed when the upper cover 2 and the lower cover 1 are closed, thereby effectively preventing steam or liquid leakage in the sealed state, improving the sealing performance, and also enhancing the stability and durability of the structure under repeated use.

[0058] Referring to Figure 8, the structure also includes a cover plate 3, which is connected to the top of the upper cover 2, and an exhaust port 33 for venting is provided between the cover plate 3 and the upper cover 2. The top of the upper cover 2 is provided with a slot 26, and the cover plate 3 is provided with a matching block 31, which has multiple notches 32. When the cover plate 3 is installed on the upper cover 2, the block 31 is inserted into the slot 26, and the notches 32 and the upper cover 2 together form an exhaust port 33 that communicates with the valve core 5 and the through hole 22.

[0059] During use, if the breathable membrane 4 is not blocked, the steam generated inside the thermos can be smoothly discharged through the main flow hole 51 of the valve core 5, the breathable membrane 4 and the air outlet 33, avoiding the safety risk caused by excessive air pressure inside the thermos.

[0060] If the breathable membrane 4 becomes clogged due to prolonged use or the accumulation of impurities, the steam inside the thermos cannot escape in time, and the pressure will gradually increase. At this time, the valve core 5 is pushed upward under pressure, causing the sealing ring 6 to deform axially, forming a gap between the sealing ring 6 and the outlet 11 of the lower cover 1, thereby releasing the steam pressure and preventing the lid from being abnormally pushed open. The above structure not only provides an automatic venting channel under normal conditions, but also has a reliable emergency pressure relief capability under abnormal conditions, thus significantly improving the safety performance and reliability of the thermos under high temperature and high pressure environments.

[0061] Furthermore, the upper cover 2 and the lower cover 1 are rotatably connected by a hinge structure. The hinge part is provided with an elastic element 7, which is a torsion spring. It is used to provide elastic assistance when the upper cover 2 is opened relative to the lower cover 1, making the opening process smoother and reducing the user's operating force. At the same time, after opening, the upper cover 2 can automatically spring back to the preset angle, effectively improving the convenience of use and the comfort of operation.

[0062] In this embodiment, the upper cover 2 is further provided with a first latch 24, and the lower cover 1 is provided with a second latch 13 that cooperates with it. When the upper cover 2 is closed on the lower cover 1, the first latch 24 and the second latch 13 are engaged, which can securely lock the upper cover 2 in the non-open state, preventing accidental opening during carrying or tilting, thereby enhancing the sealing performance and safety of the thermos. This latch structure, combined with the linkage design of the hinge and the elastic element 7, gives the thermos a good opening and closing feel and structural stability.

[0063] It should be noted that one end of the first latch 24 extends outward to form a push button 241, which allows the user to easily unlock the device. A return spring 25 is also provided between the first latch 24 and the upper cover 2, which automatically resets the latch after the user releases the button, thus restoring it to its initial position and ensuring reliable closure of the latch structure. Through this structural design, when the upper cover 2 is closed to the lower cover 1, the first latch 24 automatically engages with the second latch 13 under the action of the return spring 25, requiring no additional user intervention. This effectively improves ease of use and automation of the locking process, while also enhancing the structural stability and sealing reliability of the thermos cup when the lid is closed.

[0064] Of course, in other embodiments, a spring-loaded buckle and a limiting hole can also be used to achieve the snap-fit ​​connection between the upper cover 2 and the lower cover 1. In this structure, the spring-loaded buckle can elastically deform under external force and insert into the limiting hole. When the upper cover 2 and the lower cover 1 are closed, the spring-loaded buckle automatically returns to its original shape within the limiting hole, forming a locking engagement. This structure eliminates the need for a complex transmission mechanism, simplifying component design and enabling rapid closure and reliable locking during operation. It also improves the product's structural compactness and sealing stability, further enhancing the safety and practicality of the thermos during portable use.

[0065] Example 2

[0066] As shown in Figures 9-13, the main difference between this embodiment and Embodiment 1 above lies in the structural design of the sealing ring 6A and valve core 5A. Specifically, the optimization of the shape and connection method of the sealing ring 6A and valve core 5A not only improves the assembly stability between components but also enhances the sealing performance, effectively preventing liquid leakage. Furthermore, this structure exhibits better adaptability to changes in internal pressure, enabling more reliable pressure regulation, thereby further improving the safety and sealing reliability of the thermos in high-temperature environments, ensuring its functional stability and user experience during long-term use.

[0067] Referring to Figures 10-12, the bottom of the sealing ring 6A has several vent holes 64A, which are evenly spaced along the circumference and arranged in a circular array with the bottom center of the sealing ring 6A as the center. The valve core 5A also has a recess 52A and a main vent hole 51A for venting steam. The recess 52A is covered with a breathable membrane 4A. Steam generated inside the thermos can pass through the vent holes 64A, the main vent hole 51A, and the breathable membrane 4A in sequence and be discharged to balance the air pressure inside and outside the thermos 8, while also having good waterproof performance to prevent liquid leakage.

[0068] Furthermore, the sealing ring 6A includes an inner ring 61A and an outer ring 62A. The inner ring 61A has an annular snap-fit ​​groove 611A on its inner sidewall for securing both the valve core 5A and the vent membrane 4A. Specifically, the outer periphery of the valve core 5A snaps into the snap-fit ​​groove 611A, ensuring its stable fixation to the sealing ring 6A. Simultaneously, the edge of the vent membrane 4A is also snapped into the snap-fit ​​groove 611A, effectively preventing it from dislodging or shifting during use due to thermal expansion and contraction or pressure fluctuations.

[0069] When the breathable membrane 4A is blocked, preventing the internal steam from escaping smoothly, and causing the internal air pressure of the thermos to rise and act on the surface of the breathable membrane, the locking groove 611A can provide stable support for the breathable membrane 4A, preventing it from bulging or rupturing under high pressure, and further improving the sealing stability and pressure-bearing reliability of the component.

[0070] Furthermore, the outer ring 62A of the sealing ring 6A is also fitted onto the outer wall of the protrusion 21, with its top abutting against the step 23, thereby forming a predetermined gap space between the bottom of the outer ring 62A and the bottom of the protrusion 21. This gap, together with the inner ring 61A, forms a deformation groove 63A. By setting this deformation groove 63A, the sealing ring 6A can undergo controllable elastic deformation when subjected to internal steam high pressure, which not only maintains the good sealing performance of the sealing ring 6A under normal pressure conditions, but also provides a buffer path for the upward release of the valve core 5A under extreme pressure conditions, effectively enhancing the pressure relief response capability of the cup lid structure and improving the overall safety and structural adaptability.

[0071] Specifically, the bottom of the outer ring 62A of the sealing ring 6A is also provided with an arc surface 621A that matches the arc surface 12. Through the precise fit between the arc surfaces 621A, a tighter contact interface can be formed when the upper cover 2 and the lower cover 1 are closed, thereby effectively preventing steam or liquid leakage in the sealed state, improving the sealing performance, and enhancing the stability and durability of the structure under repeated use.

[0072] It should be noted that the breathable membrane can be cut to fit different models of cup lid components according to the size and shape requirements of the actual installation structure, such as the breathable membrane 4 in Example 1 or the breathable membrane 4A in Example 2. This cuttable design improves the versatility and adaptability of the breathable membrane, facilitating standardized material supply during production and allowing for flexible application in valve core components with different structural forms during assembly. This achieves excellent sealing and venting effects, ensuring stable internal air pressure within the cup and further enhancing the safety and reliability of the thermos under various operating conditions.

[0073] In summary, the sealing structure of the thermos cup lid of this utility model, with the deformation groove 63 providing the sealing ring 6 with controllable elastic deformation space under pressure, allows the valve core 5 to be pushed upward under the internal pressure of the thermos cup when the gas pressure inside the thermos cup increases due to blockage of the breathable membrane 4. This causes the sealing ring 6 to deform, creating a gap between the sealing ring 6 and the outlet 11 of the lower cover 1, thereby releasing steam pressure and preventing the lid from being pushed open due to excessive internal pressure. This improves the safety performance of the thermos cup under high temperature impact and achieves a reliable emergency pressure relief function.

[0074] The sealing structure of the thermos cup lid of this utility model not only improves the sensitivity of pressure relief response, but also takes into account the sealing effect and structural stability, overcoming the shortcomings of existing thermos cups in terms of insufficient safety performance under extreme working conditions, and has good practical value and promotion prospects.

[0075] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on the other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to the other component.

[0076] It should be understood that the terms "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the module or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0077] Furthermore, in the description of this utility model, "multiple" and "several" mean two or more, unless otherwise explicitly specified.

[0078] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. A sealing structure for the lid of a thermos cup, characterized in that, include: A cup lid, comprising an upper lid and a lower lid, wherein the lower lid is provided with a water outlet; The valve core has a breathable membrane; the sealing ring is used to connect the valve core to the upper cover and seal the water outlet when the upper cover and the lower cover are closed together; wherein, the sealing ring includes an inner ring and an outer ring, the inner ring is connected to the valve core, the outer ring is connected to the upper cover, and a deformation groove is provided between the inner ring and the outer ring to provide deformation space for the sealing ring.

2. The sealing structure of the thermos cup lid according to claim 1, characterized in that, The upper cover has a protrusion with a through hole; the bottom of the outer ring and the bottom of the inner ring are integrally formed, the outer ring is sleeved on the outer side wall of the protrusion, and the bottom of the protrusion, the inner bottom of the outer ring and the outer side wall of the inner ring surround to form the deformation groove; the inner ring extends into the through hole and is sleeved on the outside of the valve core.

3. The sealing structure of the thermos cup lid according to claim 2, characterized in that, The upper cover is provided with a step surrounding the protrusion. When the outer ring is fitted onto the outer side wall of the protrusion, the top of the outer ring abuts against the step.

4. The sealing structure of the thermos cup lid according to claim 2, characterized in that, The outer wall of the valve core is provided with a first groove, and the inner ring is provided with a first protrusion; when the inner ring is fitted onto the valve core, the first protrusion is engaged in the first groove.

5. The sealing structure of the thermos cup lid according to claim 2, characterized in that, The valve core is also provided with a second protrusion at the bottom, and the inner ring is also provided with a second groove; when the inner ring is fitted onto the valve core, the second protrusion is engaged in the second groove.

6. The sealing structure of the thermos cup lid according to claim 1, characterized in that, The outlet has an arc surface, and the bottom of the outer ring has an arc surface that matches the arc surface.

7. The sealing structure of the thermos cup lid according to claim 2, characterized in that, It also includes a cover plate connected to the upper cover, and an air vent is provided between the cover plate and the upper cover.

8. The sealing structure of the thermos cup lid according to claim 7, characterized in that, The upper cover has a slot, and the cover plate has a locking block with a notch. When the cover plate is connected to the upper cover, the locking block engages with the slot, and the notch and the upper cover enclose the air outlet that communicates with the through hole.

9. The sealing structure of the thermos cup lid according to claim 1, characterized in that, The upper cover and the lower cover are connected by a hinge, and the hinge part is provided with an elastic element that provides elastic force when the upper cover is opened relative to the lower cover.

10. The sealing structure of the thermos cup lid according to claim 9, characterized in that, The upper cover is also provided with a first latch, and the lower cover is also provided with a second latch that cooperates with the first latch; when the upper cover is closed on the lower cover, the first latch and the second latch are engaged with each other.

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