A water cup pop-up cover structure with double-locking unlocking function

Abstract

The utility model relates to the technical field of water cup, concretely refers to a water cup elastic cover structure with double lock catch unlocking function in turn, including lower cover, the upper end of lower cover is equipped with opening and upper cover, and the upper cover is connected lower cover through the hinge seat, be equipped with button on lower cover, be equipped with first lock catch and second lock catch on button, be equipped with lock tongue on upper cover, when first lock catch and lock tongue pair connection, upper cover seals opening, when button trends lower cover interior sliding, first lock catch unlocks lock tongue, and lock tongue can partially pop out button and pair connection with second lock catch, make upper cover and lower cover form exhaust gap between, second lock catch unlocks lock tongue and makes upper cover open to expose opening, the utility model discloses reasonable structure, and the lock tongue on upper cover has double locking cooperation with button on lower cover, and through button can first unlock first lock catch, make upper cover and lower cover between loose and discharge pressure, then unlock second lock catch and make upper cover open, prevent spatter risk when opening.

Description

Technical Field

[0001] This utility model relates to the field of water cup technology, specifically to a water cup lid structure with a double-lock sequential unlocking function. Background Technology

[0002] Insulated water bottles are common drinking utensils in daily life. Due to their excellent heat retention performance, they are suitable for brewing tea and carrying them during outdoor activities. However, the tea inside an insulated bottle remains at a relatively high temperature, which is not a suitable temperature for direct drinking. The problem with traditional insulated bottles is not only that they do not keep drinks hot enough, but also that they cannot be drunk directly when needed, and there is a risk of burns.

[0003] Chinese patent CN222870204U proposes a water cup comprising: a first cup body, a second cup body, a one-way valve, a straw, and a waterproof and breathable valve. The first cup body forms a first water storage cavity with a first opening; the second cup body forms a second water storage cavity with a second opening. The one-way valve is disposed on the second cup body and is used to unidirectionally connect the first water storage cavity and the second water storage cavity, allowing water in the first water storage cavity to flow into the second water storage cavity, and the water in the second water storage cavity to cool down more quickly for convenient drinking. It also includes: a cup lid and a locking assembly. The cup lid is hinged to the end of the second cup body away from the first cup body, and a locking interface is formed on the cup lid. The locking assembly includes a button and an elastic element disposed within the button. The button is slidably disposed on the second cup body, one end of the elastic element is connected to the button, and the other end is connected to the second cup body. The button can lock or unlock with the locking interface.

[0004] The cup lids and locking interfaces in the aforementioned existing technologies are typically made of one-piece molded plastic. The locking interfaces are prone to deformation due to wear, heat, and other factors, which reduces the locking strength of the latching assembly. When used outdoors, various situations such as violent shaking, vibration, and impacts can cause the latching assembly to fail. Furthermore, because the pressure inside the cup is greater than the external atmospheric pressure, the lid can be forced open under pressure during opening and unlocking, causing water to splash out and posing a safety risk. Therefore, the existing technology requires improvement and development. Utility Model Content

[0005] The purpose of this utility model is to address the defects and shortcomings of the existing technology by providing a water cup lid structure that is structurally reasonable, safe and reliable, and has a double-lock sequential unlocking function.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: This utility model discloses a water cup spring-loaded lid structure with a double-lock sequential unlocking function, comprising a lower lid, an opening at the upper end of the lower lid, and an upper lid. The upper lid is connected to the lower lid via a hinge seat. The lower lid has a button that can slide radially along it, and the button has a first lock and a second lock. The upper lid has a locking tongue. When the first lock and the locking tongue are paired and connected, the upper lid is locked onto the lower lid, thereby sealing the opening. When the button slides towards the inside of the lower lid, the first lock unlocks the locking tongue, and the locking tongue can partially pop out of the button and pair and connect with the second lock, so that an air vent gap is formed between the upper and lower lids. An elastic element is provided between the lower lid and the button. When the elastic element drives the button to slide towards the outside of the lower lid, the second lock unlocks the locking tongue, allowing the upper lid to open and exposing the opening.

[0007] According to the above scheme, the lower cover is provided with a slide, the button passes through the slide and can slide along its radial direction, the elastic element is provided in the slide and abuts against the button; the button is provided with a locking groove, the first latch and the second latch are respectively provided in the locking groove, and the locking tongue can be inserted vertically into the locking groove to cooperate and connect with the first latch and / or the second latch.

[0008] According to the above scheme, the first end of the lock groove is close to the center of the inner cavity of the lower cover, and the first latch is set on the edge of the first end of the lock groove; the second end of the lock groove is far away from the center of the inner cavity of the lower cover, and the second latch is set on both sides of the second end of the lock groove. There is a clearance between the first latch and the second latch, and the latch can be inserted into or disengaged from the button from the clearance.

[0009] According to the above scheme, the latch is provided with a keyhole, and the latch can be inserted into the lock groove from the clearance position. The first lock buckle is inserted into the keyhole to lock the latch vertically with the button. The lower end of the latch is provided with two hooks. When the button slides towards the inside of the lower cover, the two hooks can be hooked onto the second lock buckle respectively, so that the button locks the latch vertically. When the button slides towards the outside of the lower cover, the hooks disengage from the second lock buckle, so that the latch disengages from the button from the clearance position.

[0010] According to the above scheme, at least one limiting guide groove is provided on the inner side wall of the slide, and at least one sliding key is provided on the outer side wall of the button, and the sliding key is slidably inserted into the limiting guide groove.

[0011] According to the above scheme, the inner end of the slide is provided with a sealing end plate, and the inner cavity of the button is provided with a locking shaft. One end of the locking shaft is paired with the sealing end plate. The elastic element is a spring, and the two ends of the spring are respectively connected to the sealing end plate and the locking shaft.

[0012] According to the above scheme, the hinge seat includes a flap, the lower end of which is connected to the lower cover via a pivot, and the upper end of which is connected to the upper cover via a pivot.

[0013] According to the above scheme, the outer wall of the upper end of the lower cover is provided with a boss, and the edge of the upper cover is provided with a nose. Both the boss and the nose are semi-circular ring structures. It also includes a nose ring, which is a semi-circular ring structure, with the boss hinged to both ends of the nose ring. When the upper cover is closed on the lower cover, the nose and the boss are paired to form a complete circular ring structure and surround the button, and the nose ring can be locked on the nose.

[0014] The beneficial effects of this utility model are as follows: This utility model has a reasonable structure. The locking tongue on the upper cover and the button on the lower cover have a double locking cooperation. By sliding a single button laterally, the first latch can be unlocked first, so that there is a slight loosening between the upper cover and the lower cover to release the pressure. Then the second latch can be unlocked to open the upper cover to expose the opening, preventing the risk of splashing caused by the internal pressure of the lower cover when opening the cover and avoiding the accidental opening of the upper cover. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the top cover of this utility model when it is opened; Figure 2 This is a schematic diagram of the overall front cross-sectional structure of this utility model; Figure 3 This is a schematic diagram of the overall disassembly structure of this utility model; Figure 4 This is a schematic diagram of the button structure of this utility model.

[0016] In the picture: 1. Lower cover; 2. Upper cover; 3. Button; 11. Opening; 12. Slide rail; 13. Limiting guide groove; 14. Sealing end plate; 15. Boss; 16. Nose ring; 21. Lock tongue; 22. Keyhole; 23. Hook; 24. Flip plate; 25. Protruding nose; 31. First lock buckle; 32. Second lock buckle; 33. Lock groove; 34. Clearance position; 35. Sliding key; 36. Lock head shaft. Detailed Implementation

[0017] The technical solution of this utility model will be described below with reference to the accompanying drawings and embodiments.

[0018] like Figure 1-4As shown, the present invention discloses a water cup pop-up lid structure with a double-lock sequential unlocking function, comprising a lower lid 1, an opening 11 at the upper end of the lower lid 1 and an upper lid 2, the upper lid 2 being connected to the lower lid 1 via a hinge seat, the lower lid 1 having a button 3 that can slide radially thereon, the button 3 having a first lock 31 and a second lock 32, and the upper lid 2 having a locking tongue 21; when the first lock 31 and the locking tongue 21 are paired and connected, the upper lid 2 is locked onto the lower lid 1, thereby sealing the opening 11; when the button 3 slides toward the inside of the lower lid 1, the first lock 31 unlocks the locking tongue 21, the locking tongue 21 can partially pop out the button 3 and pair and connect with the second lock 32, so that an exhaust gap is formed between the upper lid 2 and the lower lid 1; an elastic element is provided between the lower lid 1 and the button 3, when the elastic element drives the button 3 to slide toward the outside of the lower lid 1, the second lock 32 unlocks the locking tongue 21, causing the upper lid 2 to open and thus exposing the opening 11.

[0019] As is well known, in existing technologies, a single button 3 typically establishes only one connection, which poses a safety hazard to the locking connection between the upper cover 2 and the lower cover 1. For thermos cups, the internal pressure of the lower cover 1 is greater than the external pressure. In some cups used with straws, a sudden burst of liquid can easily occur when the upper cover 2 is opened, posing a safety risk. Furthermore, the connection of a single button 3 can easily fail in the event of accidental bumps or vibrations.

[0020] It is understood that the button 3 can slide on the lower cover 1 (bidirectional / reciprocating). Typically, pressing the button 3 causes it to move inwards towards the lower cover 1. The lower cover 1 has an elastic element that can drive the button 3 away from the lower cover 1 to achieve a reset. Of course, the reset travel of the button 3 is limited, and the elastic element can be an existing device such as a spring. When the upper cover 2 closes the opening 11 on the lower cover 1, the locking tongue 21 engages with the button 3, locking the upper cover 2 onto the lower cover 1 via the first latch 31 and / or the second latch 32.

[0021] Preferably, the unlocking action of the button 3 is two-stage, that is, the first stage of sliding displacement of the button 3 unlocks the first latch 31, and the second stage of displacement of the button 3 unlocks the second latch 31, thereby forming a double-cooperation connection between the latch 21 and the button 3, and the second latch 31 cooperates with the first latch 31 to delay the unlocking of the latch 21, preventing the top cover 2 from accidentally popping open.

[0022] The purpose and advantage of the above configuration is that when button 3 moves towards the lower cover 1, the first latch 31 unlocks, and the second latch 32 vertically locks the latch 21. The second latch 32 has a certain amount of room for movement in locking the latch 21, allowing the latch 21 to move slightly vertically. This releases the rigid locking between the upper cover 2 and the lower cover 1, effectively loosening the tight connection between them and creating an exhaust gap. This allows the air pressure inside the lower cover 1 to escape through the opening 11, preventing the risk of a sudden blowout caused by the upper cover 2 popping open. Furthermore, when button 3 resets, the second latch 32 unlocks the latch 21, completely disengaging the connection between the latch 21 and button 3, allowing the upper cover 2 to be safely opened.

[0023] It is understood that the lower cover 1 is used to assemble onto the mouth of the thermos, and the upper cover 2 covers the lower cover 1 to close the opening 11, thus sealing the inner cavity of the thermos. Furthermore, the lower cover 1 can also be used as a lid assembly for the thermos. Specifically, the side wall of the lower cover 1 extends downward to form an inner cavity, and its lower end connects to the mouth of the thermos. A partition layer is provided between the lower end of the lower cover 1 and the thermos, thereby forming water-storing cavities in both the lower cover 1 and the thermos. A valve is provided on the partition layer to control the flow between the two water-storing cavities. Of course, the side wall of the thermos has an insulation layer for heat preservation, while the lower cover 1 lacks an insulation layer, allowing the water in its inner cavity to cool quickly, thus facilitating drinking water at a suitable temperature through the opening 11.

[0024] Specifically, the lower cover 1 is provided with a slide 12, the button 3 passes through the slide 12 and can slide radially therein, the elastic element is provided in the slide 12 and abuts against the button 3; the button 3 is provided with a locking groove 33, the first latch 31 and the second latch 32 are respectively provided in the locking groove 33, and the locking tongue 21 can be inserted vertically into the locking groove 33 to cooperate and connect with the first latch 31 and / or the second latch 32.

[0025] The button 3 is mounted on the lower cover 1 via a slide rail 12, and the button 3 can slide radially back and forth along the slide rail 12. Of course, when the user presses the button 3, it slides towards the lower cover 1; releasing the elastic element of the button 3 drives the button 3 away from the lower cover 1. Furthermore, a notch needs to be provided on the slide rail 12 to match the locking groove 33, so that the locking tongue 21 can be vertically inserted into or pulled out of the locking groove 33. The first latch 31 and the second latch 32 are both located within the locking groove 33, allowing the locking tongue 21 to be paired and connected with the first latch 31 and the second latch 32 respectively.

[0026] Pressing the button 3 causes it to slide towards the lower cover 1, which unlocks the first latch 31, thereby engaging the latch 21 with the second latch 32. Releasing the button 3 allows the elastic element to drive the button 3 away from the lower cover 1, thus unlocking the second latch 32. When the latch 21 is vertically inserted into the lock groove 33, the latch 21 can pair with the first latch 31 to form a lock.

[0027] Preferably, the unlocking action of button 3 is two-stage. The first stage of button 3's sliding displacement is towards the lower cover 1, which unlocks the first latch 31, allowing the latch 21 to engage with the second latch 32. In the second stage of button 3's displacement, the user releases button 3, and the elastic element drives button 3 away from the lower cover 1. At this time, the second latch 32 disengages from the latch 21, thus fully unlocking the latch 21. The latch 21 and button 3 form a two-stage double locking mechanism, and the two unlocking actions of button 3 are in opposite directions, preventing the upper cover 2 from accidentally popping open.

[0028] The first end of the locking groove 33 is close to the center of the inner cavity of the lower cover 1, and the first latch 31 is disposed on the edge of the first end of the locking groove 33. The second end of the locking groove 33 is away from the center of the inner cavity of the lower cover 1, and the second latch 32 is disposed on both sides of the second end of the locking groove 33. A clearance position 34 is provided between the first latch 31 and the second latch 32, and the latch 21 can be inserted into or disengaged from the button 3 through the clearance position 34. Corresponding to the two-stage unlocking action of the button 3, the length direction of the locking groove 33 is also set along the radial direction of the lower cover 1, which is consistent with the movement path of the button 3. The first end of the locking groove 33 is close to the lower cover 1 and is provided with the first latch 31. The first latch 31 is provided with an upward-facing wedge surface. When the latch 21 is inserted, the latch 21 abuts against the wedge surface, causing the button 3 to move slightly towards the lower cover 1, so that the latch 21 can be inserted downward into the clearance position 34. The elastic element drives the button 3 to reset, so that the first latch 32 and the latch 21 are paired and connected.

[0029] Due to the presence of the elastic element, when the user presses the button 3, the user needs to overcome the elastic resistance. The pressing force is large, causing the button 3 to move instantaneously. The button 3 moves relative to the locking tongue 21 along the slide 12 toward the center of the inner cavity of the lower cover 1. At the same time as the locking tongue 21 unlocks with the first latch 31, the locking tongue 21 can quickly pass over the clearance position 34 and form a cooperative connection with the second latch 32.

[0030] The user's action of releasing the button 3 is relatively slow, and the elastic element can drive the button 3 to slide away from the center of the inner cavity of the lower cover 1, so that the locking tongue 21 is unlocked from the second latch 32. At this time, the locking tongue 21 can slide upward from the clearance position 34.

[0031] It is understandable that the second latch 32 restricts the vertical movement of the latch 21, that is, there is friction between the two. Even if the user releases the button 3 quickly, the elastic element can overcome the friction to unlock the second latch 32 and the latch 21. Moreover, the reset action of the button 3 driven by the elastic element is relatively slow, so that the latch 21 can slide out from the avoidance position 34 by itself.

[0032] Specifically, the latch 21 is provided with a keyhole 22, and the latch 21 can be inserted into the lock groove 33 from the clearance position 34. The first latch 31 is inserted into the keyhole 22 to lock the latch 21 vertically with the button 3. The lower end of the latch 21 is provided with two hooks 23. When the button 3 approaches the center of the inner cavity of the lower cover 1, the two hooks 23 can be hooked onto the second latch 32 respectively, so that the button 3 locks the latch 21 vertically. When the button 3 slides away from the center of the inner cavity of the lower cover 1, the hooks 23 disengage from the second latch 32, so that the latch 21 disengages from the button 3 from the clearance position 34.

[0033] When the latch 21 is inserted into the lock groove 33, the wedge surface is pressed, causing the button 3 to move slightly towards the center of the inner cavity of the lower cover 1. After the keyhole 22 is paired with the first latch 31, the button 3 retracts under the action of the elastic element, causing the first latch 31 to be inserted into the keyhole 22 laterally. The button 3 then forms a vertical limiting lock on the latch 21. The hook 23 is located below the keyhole 22. When the button 3 is pressed down along the slide 12 to the center of the inner cavity of the lower cover 1, the first latch 31 unlocks from the latch 21. The hooks of the two hooks 23 are hooked onto the second latch 32, so that the button 3 still forms a vertical limiting lock on the latch 21. The difference is that at this time, the latch 21 has a small degree of freedom of vertical displacement, causing a loosening between the upper cover 2 and the lower cover 1 to form an air vent. The air pressure in the lower cover 1 can be released, but the upper cover 2 still cannot be opened. Finally, releasing button 3 disengages the second latch 32 from hook 23, allowing the latch 21 to slide out from the clearance position 34, thus completing the opening action.

[0034] At least one limiting guide groove 13 is provided on the inner sidewall of the slide rail 12, and at least one sliding key 35 is provided on the outer sidewall of the button 3. The sliding key 35 is slidably inserted into the limiting guide groove 13. The limiting guide groove 13 is provided on the inner sidewall of the slide rail 12, and the sliding key 35 is slidably assembled in the limiting guide groove 13. It is used to prevent the button 3 from dislodging from the slide rail 12 and to limit the initial position of the button 3. That is, the locking groove 33 on the button 3 needs to correspond to the locking tongue 21. In particular, the locking groove 33 on the button 3 is set upward so that the locking tongue 21 can be directly aligned with the wedge surface on the first latch 31 when inserted, and the button 3 is slid towards the lower cover 1 by pressing the wedge surface, so that the locking tongue 21 can be inserted into the button 3 from the clearance position 34.

[0035] It is understood that a cover is provided on the upper surface of the lower cover 1, and the cover and the lower cover 1 are each provided with a semi-circular groove to match each other, thereby forming a slide 12 with a built-in limiting guide groove 13 on the lower cover 1. Of course, the button 3 and the elastic element need to be installed in the slide 12 in advance.

[0036] The inner end of the slide rail 12 is provided with a sealing end plate 14, and the inner cavity of the button 3 is provided with a locking shaft 36, one end of which is paired with the sealing end plate 14. The elastic element is a spring, and the two ends of the spring are respectively connected to the sealing end plate 14 and the locking shaft 36. The slide rail 12 is not connected to the inner cavity of the lower cover 1. The sealing end plate 14 is used to limit the travel of the button 3, and the spring paired with the locking shaft 36 drives the button 3 to reset.

[0037] The hinge seat includes a flap 24, the lower end of which is connected to the lower cover 1 via a pivot, and the upper end of which is connected to the upper cover 2 via a pivot.

[0038] The upper cover 2, the flip plate 24, and the lower cover 1 are connected in sequence by a pivot, so that the upper cover 2 has two hinge connection points relative to the lower cover 1. The upper cover 2 has a larger flipping range on the lower cover 1, and the opening and closing actions are more flexible.

[0039] Understandably, in conventional designs, the upper cover 2 and the lower cover 1 are directly connected by a pivot. The rotation angle of the upper cover 2 relative to the lower cover 1 is between 75° and 120°. The upper cover 2 still stands upright on the upper surface of the lower cover 1. When the user drinks water through the opening 11, the upper cover 2 is likely to hit the user's face, resulting in a poor user experience.

[0040] The preferred flip plate 24 of this utility model serves as a connector between the upper cover 2 and the lower cover 1, allowing the upper cover 2 to be completely flipped, i.e., the flip angle of the upper cover 2 can be greater than 180°, so that the inner side of the upper cover 2 and the upper end face of the lower cover 1 are facing upwards, thus preventing the upper cover 2 from affecting the user's drinking water through the opening 11.

[0041] Furthermore, a torsion spring can be installed on the hinge seat composed of the flip plate 24 and the rotating shaft to realize the automatic pop-opening function of the upper cover 2 when the button 3 is opened.

[0042] In particular, after the upper cover 2 is opened, the torsion spring can restrict the upper cover 2 from flipping towards the opening, that is, the upper cover 2 is locked relative to the lower cover 1, preventing the upper cover 2 from flipping on its own and hitting the user's face when the user drinks water.

[0043] The lower cover 1 has a boss 15 on its upper outer wall, and the upper cover 2 has a nose 25 on its edge. Both the boss 15 and the nose 25 are semi-circular ring structures. It also includes a nose ring 16, which is a semi-circular ring structure with the boss 15 hinged to both ends. When the upper cover 2 is closed on the lower cover 1, the nose 25 and the boss 15 pair to form a complete circular ring structure surrounding the button 3, and the nose ring 16 can be locked onto the nose 25. The nose 25 and the boss 15 form a circular ring buckle structure. Locking this circular ring buckle structure with the nose ring 16 provides drop and impact protection, preventing the upper cover 2 from popping open on its own.

[0044] The above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A water cup spring-loaded lid structure with a double-lock sequential unlocking function, comprising a lower lid (1), wherein the upper end of the lower lid (1) is provided with an opening (11) and an upper lid (2), and the upper lid (2) is connected to the lower lid (1) via a hinge seat, characterized in that: The lower cover (1) is provided with a button (3) that can slide radially thereon. The button (3) is provided with a first latch (31) and a second latch (32). The upper cover (2) is provided with a latch (21). When the first latch (31) and the latch (21) are paired and connected, the upper cover (2) is locked on the lower cover (1) to seal the opening (11). When the button (3) slides toward the inside of the lower cover (1), the first latch (31) unlocks the latch (21). The latch (21) can partially pop out the button (3) and pair with the second latch (32) to form an exhaust gap between the upper cover (2) and the lower cover (1). An elastic element is provided between the lower cover (1) and the button (3). When the elastic element drives the button (3) to slide toward the outside of the lower cover (1), the second latch (32) unlocks the latch (21) to open the upper cover (2) and expose the opening (11).

2. The water cup lid structure with a double-lock sequential unlocking function according to claim 1, characterized in that: The lower cover (1) is provided with a slide (12), the button (3) passes through the slide (12) and can slide along its radial direction, the elastic element is provided in the slide (12) and abuts against the button (3); the button (3) is provided with a locking groove (33), the first latch (31) and the second latch (32) are respectively provided in the locking groove (33), and the locking tongue (21) can be inserted vertically into the locking groove (33) to cooperate with the first latch (31) and / or the second latch (32).

3. The water cup lid structure with a double-lock sequential unlocking function according to claim 2, characterized in that: The first end of the lock groove (33) is close to the center of the inner cavity of the lower cover (1), and the first latch (31) is set on the edge of the first end of the lock groove (33); the second end of the lock groove (33) is far away from the center of the inner cavity of the lower cover (1), and the second latch (32) is set on both sides of the second end of the lock groove (33). A clearance position (34) is provided between the first latch (31) and the second latch (32), and the latch (21) can be inserted into or disengaged from the button (3) through the clearance position (34).

4. The water cup lid structure with a double-lock sequential unlocking function according to claim 3, characterized in that: The latch (21) is provided with a keyhole (22). The latch (21) can be inserted into the lock groove (33) from the clearance position (34). The first latch (31) is inserted into the keyhole (22) so that the button (3) locks the latch (21) in the vertical direction. The lower end of the latch (21) is provided with two hooks (23). When the button (3) slides towards the inside of the lower cover (1), the two hooks (23) can be hooked onto the second latch (32) respectively, so that the button (3) locks the latch (21) in the vertical direction. When the button (3) slides towards the outside of the lower cover (1), the hooks (23) disengage from the second latch (32) so that the latch (21) disengages from the button (3) from the clearance position (34).

5. The water cup lid structure with a double-lock sequential unlocking function according to claim 2, characterized in that: The inner wall of the slide (12) is provided with at least one limiting guide groove (13), and the outer wall of the button (3) is provided with at least one sliding key (35), which is slidably inserted into the limiting guide groove (13).

6. The water cup lid structure with a double-lock sequential unlocking function according to claim 2, characterized in that: The inner end of the slide (12) is provided with a sealing end plate (14), and the inner cavity of the button (3) is provided with a locking shaft (36). One end of the locking shaft (36) is paired with the sealing end plate (14). The elastic element is a spring, and the two ends of the spring are respectively connected to the sealing end plate (14) and the locking shaft (36).

7. The water cup lid structure with a double-lock sequential unlocking function according to claim 1, characterized in that: The hinge seat includes a flap (24), the lower end of which is connected to the lower cover (1) via a pivot, and the upper end of which is connected to the upper cover (2) via a pivot.

8. The water cup lid structure with a double-lock sequential unlocking function according to claim 1, characterized in that: The lower cover (1) has a boss (15) on the outer wall at the upper end, and the upper cover (2) has a nose (25) on the edge. Both the boss (15) and the nose (25) are semi-circular ring structures. It also includes a nose ring (16), which is a semi-circular ring structure. The two ends of the nose ring (16) are respectively hinged to the boss (15). When the upper cover (2) is closed on the lower cover (1), the nose (25) and the boss (15) are paired to form a complete circular ring structure and surround the button (3). The nose ring (16) can be locked on the nose (25).

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