A cup cover structure with detachable inner cover and a water cup formed by the cup cover structure

Abstract

This utility model relates to the field of household utensils, and in particular to a cup with a detachable inner lid and a water cup thereof. The cup includes a lid body and a straw. The lid body comprises an upper lid and a lower lid. One side of the upper lid is hinged to the lower lid, and the opposite side is either engaged or disengaged from the lower lid. An inner lid is detachably connected to the lower lid. The straw passes through the inner lid. One side of the inner lid has an elastic buckle, and the opposite side has a fixing protrusion. The lower lid has a groove step that engages with the elastic buckle, and a positioning groove corresponding to the fixing protrusion. The fixing protrusion engages in the positioning groove, and the elastic buckle engages in the groove step, thus engaging the inner lid with the lower lid. Disassembly requires only one hand to press the elastic buckle to disengage it from the groove step, causing one side of the inner lid to separate from the lower lid, while the fixing protrusion disengages from the positioning groove. This separation of the inner and lower lid facilitates cleaning, reduces bacterial growth, and ensures safe drinking water.

Description

Technical Field

[0001] This utility model relates to the field of household utensils technology, specifically to a cup lid structure with a detachable inner lid and a water cup made therefrom. Background Technology

[0002] In daily life and work, water cups have become indispensable daily necessities. As a key component of the water cup, the rationality of its structural design directly affects user experience and health safety. Currently, the vast majority of water cup lids on the market adopt an integrated or semi-integrated structure. The threaded inner lid is usually integrally molded with the main body of the lid through injection molding, or fixedly connected using complex nesting and snap-fit ​​methods. While this design ensures the lid's sealing and structural stability to a certain extent, it brings serious cleaning challenges.

[0003] In practical use, the inside of the cup lid is often damp. After each use, tea stains, coffee stains, milk stains, and other beverage residues easily accumulate in the gaps and corners of the inner lid. According to data from relevant health agencies, the total number of bacterial colonies on the threaded inner surface of a regular water cup lid that has not been thoroughly cleaned for a week can reach thousands per square centimeter, including harmful bacteria such as E. coli and Staphylococcus aureus. However, due to the fixed connection between the inner lid and the main body of the cup lid, users can only clean it through regular rinsing and wiping, making it difficult to reach the tiny corners inside. This results in long-term residue of dirt and bacteria, seriously threatening the user's health.

[0004] While some water bottles have introduced detachable lids in recent years, these designs suffer from significant shortcomings in terms of ease of use. Most existing detachable lids require both hands to operate; for example, one hand must hold the lid body while the other hand twists or pries the inner lid to separate it. Some designs even require tools for disassembly. This deficiency is particularly pronounced in practical cleaning scenarios: at home, if a user is holding a child in one arm and needs to clean the lid with the other, the traditional two-handed operation is almost impossible; in an office environment, when a user is busy processing documents or answering the phone with one hand and wants to clean the lid after use with the other, the existing lid removal methods are extremely inconvenient. Market research data indicates that over 70% of users abandon regular deep cleaning of their water bottle lids due to the cumbersome operation of existing detachable lids, further exacerbating hygiene risks.

[0005] Therefore, developing a cup lid structure and cup that can both facilitate easy disassembly and cleaning of the inner lid and meet the needs of one-handed operation has become an urgent technical problem to be solved in the field of cup manufacturing. It is of great practical significance for improving user experience and ensuring health and safety. Utility Model Content

[0006] The purpose of this utility model is to provide a cup lid structure with a detachable inner lid and a cup thereof, so as to realize the separate disassembly and cleaning of the inner lid in the cup lid, and solve the problem of incomplete cleaning of the cup lid in the prior art; the secondary purpose is to enable the cup lid to be disassembled with one hand, improve the convenience of use, and meet the user's needs in different scenarios.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A cup lid structure with a removable inner lid, comprising:

[0009] The cup lid body and the straw. The cup lid body includes an upper lid and a lower lid. One side of the upper lid is hinged to the lower lid, and the opposite side of the upper lid is either engaged or disengaged from the lower lid.

[0010] The inner cover is detachably connected to the lower cover. The straw passes through the inner cover. One side of the inner cover has an elastic buckle, and the opposite side has a fixing protrusion. The lower cover has a groove step that engages with the elastic buckle. The lower cover has a positioning groove corresponding to the fixing protrusion. The fixing protrusion is inserted into the positioning groove, and the elastic buckle is inserted into the groove step, so that the inner cover and the lower cover are fastened together.

[0011] Preferably, the elastic buckle is vertically disposed on the inner cover, its bottom is fixedly connected to the inner cover and extends upward to provide a locking hook, the locking hook and the groove step cooperate with each other to achieve a fastening connection.

[0012] Preferably, the lower cover is further provided with a limiting post, the limiting post is disposed on the inner side of the lower cover, and the outer side of the inner cover is provided with a limiting groove corresponding to the position of the limiting post.

[0013] Preferably, the lower cover is fastened or separated from the upper cover by a fastening mechanism. The fastening mechanism includes a switch button and a return spring. The switch button is connected to the lower cover through the return spring. The side of the lower cover that is fastened or separated from the upper cover has an installation opening. The switch button is disposed in the installation opening. A hook is provided on the outside of the switch button. A retaining ring is provided on the inside of the upper cover for fastening with the hook.

[0014] Preferably, the inner side of the lower cover is covered with a shield for mounting a switch button at the position corresponding to the mounting opening. The switch button is mounted at the mounting opening through the shield. The shield has a spring mounting hole. The inner side of the switch button has a spring post. A reset spring is disposed between the switch button and the shield through the spring post and the spring mounting hole.

[0015] Preferably, the lower cover is further provided with a locking mechanism, the locking mechanism including a locking button, the locking button having a locking rod for limiting the pressing stroke of the switch button, the lower cover having a switch window on one side of the switch button, the locking button being located inside the switch window and moving within the switch window, the switch window also having a mark for identifying locking and unlocking; the locking rod is movably disposed between the switch button and the cover plate, the inner side of the switch button having a limiting protrusion that cooperates with the locking rod, the locking button moving along the direction of the switch window and causing the locking rod to move between the locked position and the unlocked position;

[0016] When the locking lever is in the locked position, it is positioned between the switch button and the blocking plate, and it abuts against the limiting protrusion to restrict the pressing of the switch button; when the locking lever is in the unlocked position, the locking lever and the switch button are offset to allow the switch button to be pressed.

[0017] Preferably, a lower hook is provided below the switch button, and a slot is provided at the position of the mounting opening corresponding to the lower hook, with the lower hook engaging with the slot; a limiting ring is provided above the switch button, and a limiting pin is provided at the position of the lower cover corresponding to the limiting ring.

[0018] Preferably, the upper cover is further provided with an upper pressure plate, and the inner cover is provided with a convection channel at the position corresponding to the upper pressure plate. When the upper cover is fastened to the lower cover, the upper pressure plate presses and deforms the straw to close the suction channel of the straw, and at the same time blocks and closes the convection channel.

[0019] Preferably, the bottom of the inner cover is fitted with a V-shaped valve sleeve for preventing water leakage at the position corresponding to the flow channel.

[0020] A water cup includes a cup body and any of the above-described removable inner lid structures. The inner lid is sealed to the mouth of the cup body, and the inner lid is threaded to the mouth of the cup body. A sealing ring is provided between the inner lid and the mouth of the cup body in the sealed connection.

[0021] The advantages of this invention compared to existing technologies are as follows: This invention uses an elastic buckle on one side of the inner cover to engage with the grooved step of the lower cover, while a fixing protrusion on the other side engages with the positioning groove of the lower cover. During disassembly, simply press the elastic buckle with one hand to disengage it from the grooved step, causing the inner cover to separate from the lower cover. Simultaneously, the fixing protrusion automatically disengages from the positioning groove, achieving rapid separation of the inner cover and the lower cover. This convenient disassembly method allows users to easily perform deep cleaning of the inner cover, which is prone to staining, especially at the straw perforation and corners of the inner cover, effectively reducing the risk of bacterial growth and ensuring the user's drinking water health. Attached Figure Description

[0022] Figure 1 This is an exploded view of the lower cover and inner cover of the cup lid of this utility model;

[0023] Figure 2 This is a cross-sectional schematic diagram of the lower cover and inner cover of the cup lid of this utility model;

[0024] Figure 3 This is a cross-sectional schematic diagram of the cup lid and cup body of this utility model;

[0025] Figure 4 for Figure 3 A magnified view of the area marked "A" in the diagram;

[0026] Figure 5 This is a schematic diagram of the structure of the lower cover, push button switch, and locking switch of this utility model;

[0027] Figure 6 This is another schematic diagram of the push-button switch in this utility model;

[0028] Figure 7 for Figure 3 A magnified view of the area marked "B" in the diagram.

[0029] In the diagram, 1. straw, 2. top cover, 3. bottom cover, 4. inner cover, 5. elastic buckle, 6. fixing protrusion, 7. groove step, 8. positioning groove, 9. locking hook, 10. limiting post, 11. limiting groove, 12. switch button, 13. return spring, 14. mounting opening, 15. hook, 16. retaining ring, 17. shielding plate, 18. spring mounting hole, 19. spring post, 20. locking button, 21. locking rod, 22. switch window, 23. limiting protrusion, 24. lower hook, 25. slot, 26. limiting insert ring, 27. limiting pin, 28. upper pressure plate, 29. convection channel, 30. V-shaped valve sleeve, 31. cup body, 32. sealing ring. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0031] It should be noted that when a component / part is referred to as being "set on" another component / part, it can be directly set on the other component / part or there may be an intervening component / part. When a component / part is referred to as being "connected / linked" to another component / part, it can be directly connected / linked to the other component / part or there may be an intervening component / part. The term "connected / linked" as used herein can include electrical and / or mechanical physical connections / links. The term "including / comprises" as used herein means the presence of a feature, step, or component / part, but does not exclude the presence or addition of one or more other features, steps, or components / parts. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0032] Example 1:

[0033] like Figures 1 to 2 As shown, a cup lid structure with a detachable inner lid includes: a cup lid body and a straw 1. The cup lid body includes an upper lid 2 and a lower lid 3. One side of the upper lid 2 is hinged to the lower lid 3, and the opposite side of the upper lid 2 is engaged or disengaged from the lower lid 3. An inner lid 4 is detachably connected to the lower lid 3. The straw 1 passes through the inner lid 4. One side of the inner lid 4 is provided with an elastic buckle 5, and the opposite side is provided with a fixing protrusion 6. The lower lid 3 is provided with a groove step 7 that engages with the elastic buckle 5. The lower lid 3 is provided with a positioning groove 8 corresponding to the fixing protrusion 6. The fixing protrusion 6 is engaged in the positioning groove 8. The positioning groove 8 is either a groove formed between the protrusion and the lower lid or a protrusion that engages with the fixing protrusion 6. The elastic buckle 5 is engaged in the groove step 7 so that the inner lid 4 is engaged with the lower lid 3.

[0034] Connection between the lower cover 3 and the inner cover 4: The lower cover 3 and the inner cover 4 are connected by an elastic buckle 5 on one side of the inner cover 4 and a groove step 7 on the lower cover 3, and a fixing protrusion 6 on the other side and a positioning groove 8 on the lower cover 3 are engaged and locked together.

[0035] When the lower cover 3 and the inner cover 4 need to be disassembled, first press the side of the inner cover 4 with the elastic buckle 5 with one thumb or forefinger (specific location: the part of the elastic buckle 5 exposed on the edge of the inner cover 4); then apply downward or inward pressure to make the elastic buckle 5 elastically deform and disengage from the groove step 7 of the lower cover 3 (at this time, you can hear a slight "click" unlocking sound or feel the buckle loosening); after the elastic buckle 5 disengages from the groove step 7, one side of the inner cover 4 has separated from the lower cover 3. At this time, the inner cover 4 is in a state of suspension on one side. Since the fixing protrusion 6 is only placed in the positioning groove 8 and has no locking structure, when the inner cover 4 is tilted, the fixing protrusion 6 will naturally slide out of the positioning groove 8 due to gravity and tilt angle. This disassembly method, which can be completed with one hand without tools or complicated steps, allows users to easily perform deep cleaning of the inner cover 4, which is prone to residual stains. In particular, the perforation of the straw 1 and the corners of the inner cover 4, which are often hard-to-reach areas, can be effectively cleaned, greatly reducing the risk of bacterial growth and ensuring the health of users' drinking water.

[0036] The elastic buckle 5 is vertically mounted on the inner cover 4. Its bottom is connected and fixed to the inner cover 4 and extends upward to provide a locking hook 9. The locking hook 9 cooperates with the groove step 7 to achieve a fastening connection. When disassembly is required, the user only needs to press the locking hook 9 to disengage it from the groove step 7. The elastic buckle 5 may be made of silicone or soft rubber, or may be made of other types of elastic materials or structures such as PP (polypropylene) or PCT (polyvinyl chloride), which are not specifically limited here.

[0037] like Figure 1 and Figure 4 As shown, the lower cover 3 is also provided with a limiting post 10, which is located on the inner side of the lower cover 3. The outer side of the inner cover 4 is provided with a limiting groove 11 corresponding to the limiting post 10. When installing the inner cover 4, the limiting post 10 can be inserted into the limiting groove 11, providing a clear installation guide for the inner cover 4. This can prevent the inner cover 4 from shifting or tilting during installation, ensuring that the inner cover 4 can be accurately installed in the predetermined position on the lower cover 3, thus ensuring the standardization and consistency of product assembly. In addition, during product use, it may be subjected to external forces such as squeezing, collision, or vibration. The cooperation between the limiting post 10 and the limiting groove 11 can form a rigid support structure, enhancing the connection strength between the inner cover 4 and the lower cover 3. For example, when the product is subjected to external impact, it reduces the relative displacement between the inner cover 4 and the lower cover 3, reducing the risk of product failure due to structural loosening.

[0038] Example 2:

[0039] like Figure 5 and Figure 7As shown, the lower cover 3 is fastened or separated from the upper cover 2 by a fastening mechanism. The fastening mechanism includes a switch button 12 and a return spring 13. The switch button 12 is connected to the lower cover 3 through the return spring 13. The side of the lower cover 3 that is fastened or separated from the upper cover 2 is provided with an installation opening 14. The switch button 12 is disposed in the installation opening 14. A hook 15 is provided on the outside of the switch button 12. A retaining ring 16 for fastening with the hook 15 is provided on the inside of the upper cover 2.

[0040] When the upper cover 2 and the lower cover 3 need to be fastened together, the retaining ring 16 on the inner side of the upper cover 2 aligns with the hook 15 of the switch button 12. At this time, the upper cover 2 is gently pressed down, and the upper cover 2 moves downward. The retaining ring 16 contacts the hook 15. As the upper cover 2 continues to be pressed down, the hook 15 is squeezed by the retaining ring 16, overcoming the elastic force of the return spring 13, and retracts into the mounting opening 14. When the retaining ring 16 passes the highest point of the hook 15, the return spring 13 returns to its original shape, pushes the switch button 12 to reset, and the hook 15 extends out again and is engaged in the retaining ring 16, completing the fastening of the lower cover 3 and the upper cover 2, making the two tightly connected as a whole.

[0041] When the upper cover 2 and the lower cover 3 need to be separated, simply press the switch button 12. Under the pressure of the switch button 12, the return spring 13 is compressed and moves into the mounting opening 14, causing the hook 15 to retract together. After the hook 15 retracts, it disengages from the retaining ring 16 on the inner side of the upper cover 2, releasing the constraint on the retaining ring 16. At this time, the upper cover 2 is no longer obstructed by the hook 15 and can be flipped upwards to separate the lower cover 3 from the upper cover 2.

[0042] like Figure 5 and Figure 6 As shown, the inner side of the lower cover 3, corresponding to the mounting opening 14, is covered with a shielding plate 17 for mounting the switch button 12. The switch button 12 is mounted at the mounting opening 14 via the shielding plate 17. The shielding plate 17 has a spring mounting hole 18. The inner side of the switch button 12 has a spring post 19. A reset spring 13 is positioned between the switch button 12 and the shielding plate 17 via the spring post 19 and the spring mounting hole 18. During installation, the reset spring 13 is first fitted onto the spring post 19 inside the switch button 12. Then, the other end of the spring is inserted into the spring mounting hole 18 of the shielding plate 17. Subsequently, the assembled switch button 12 and shielding plate 17 are installed together at the mounting opening 14 on the inner side of the lower cover 3. The shielding plate 17 covers the mounting opening 14, fixing the range of motion of the switch button 12. At the same time, the shielding plate 17 hides the mounting structure and internal components of the switch button 12, making the inner surface of the lower cover 3 smoother and easier to clean, thus improving the product's aesthetic appearance.

[0043] like Figure 5 and Figure 7As shown, the lower cover 3 is also provided with a locking mechanism, which includes a locking button 20. The locking button 20 is provided with a locking rod 21 for limiting the pressing stroke of the switch button 12. The lower cover 3 is provided with a switch window 22 on one side of the switch button 12. The locking button 20 is located in the switch window 22 and moves within the switch window 22. The switch window 22 is also provided with a mark for identifying locking and unlocking. The locking rod 21 is movably disposed between the switch button 12 and the cover plate 17. The inner side of the switch button 12 is provided with a limiting protrusion 23 that cooperates with the locking rod 21. The locking button 20 moves along the direction of the switch window 22 and drives the locking rod 21 to move between the locked position and the unlocked position.

[0044] In the unlocked state, the locking button 20 is in the unlocked position, and the locking lever 21 is offset from the switch button 12. At this time, pressing the switch button 12 is unobstructed, and the switch button 12 can normally compress the return spring 13, causing the hook 15 to retract, thus separating the lower cover 3 from the upper cover 2. When performing the fastening operation, the upper cover 2 is pressed down, and the hook 15 overcomes the elastic force of the return spring 13 and retracts, then resets and locks the upper cover 2 retaining ring 16. Throughout the process, the switch button 12 can move freely without being disturbed by the locking lever 21.

[0045] When it is necessary to lock the latching mechanism to prevent accidental separation, push the locking button 20 to move along the locking mark direction of the switch window 22; the locking button 20 drives the locking lever 21 to move from the unlocked position to the locked position, and the locking lever 21 gradually enters between the switch button 12 and the blocking plate 17. When the locking lever 21 reaches the locked position, it abuts against the limiting protrusion 23 on the inner side of the switch button 12. At this time, the locking lever 21 restricts the pressing stroke of the switch button 12. No matter how much external force is applied, the switch button 12 cannot compress the return spring 13 to drive the hook 15 to retract, thus keeping the lower cover 3 and the upper cover 2 firmly engaged and preventing accidental separation. To unlock, push the locking button 20 in the opposite direction, causing it to move the locking lever 21 from the locked position to the unlocked position. As the locking button 20 moves, the locking lever 21 gradually shifts away from the position of the switch button 12 and no longer contacts the limiting protrusion 23. When the locking lever 21 is fully in the unlocked position, the switch button 12 returns to its free movement state, and the user can then separate the lower cover 3 from the upper cover 2 by pressing the switch button 12 normally.

[0046] The switch button 12 is provided with a lower hook 24 below it, and the mounting opening 14 is provided with a slot 25 corresponding to the position of the lower hook 24. The lower hook 24 and the slot 25 are engaged. The switch button 12 is provided with a limiting ring 26 above it, and the lower cover 3 is provided with a limiting pin 27 corresponding to the position of the limiting ring 26. The engagement of the lower hook 24 and the slot 25, and the engagement of the limiting ring 26 and the limiting pin 27, limit and fix the switch button 12 from both the top and bottom, preventing the switch button 12 from shaking, tilting or falling out at the mounting opening 14. Even if the product is subjected to strong vibration or external impact, the switch button 12 can still maintain its original position, ensuring the normal operation of the fastening mechanism and the locking mechanism. Furthermore, when installing the switch button 12, workers can quickly complete the installation by simply aligning and pressing it, improving assembly efficiency. During product maintenance, if the switch button 12 malfunctions, the limit pin 27 can be pulled out from the limit ring 26 to release the restriction on the switch button 12. Then, the corresponding parts can be disassembled, making it easy and quick to remove it from the lower cover 3 for replacement without complicated tools or cumbersome disassembly steps, thus reducing maintenance costs and time.

[0047] Example 3:

[0048] like Figure 1 and Figure 3 As shown, the upper cover 2 is also provided with an upper pressure plate 28, and the inner cover 4 is provided with a convection channel 29 corresponding to the position of the upper pressure plate 28. When the upper cover 2 is fastened to the lower cover 3, the upper pressure plate 28 presses and deforms the straw 1 to close the suction channel of the straw 1, and at the same time blocks and closes the convection channel 29. When the upper cover 2 and the lower cover 3 are fastened, the upper cover 2 is aligned with the lower cover 3 and slowly pressed down. As the upper cover 2 moves closer to the lower cover 3, the upper pressure plate 28 inside the upper cover 2 moves downward. The upper pressure plate 28, with the pressure applied by the upper cover 2, squeezes and bends the straw 1 downward. After being subjected to the pressure of the upper pressure plate 28, the straw 1 deforms, and its suction channel is squeezed and closed, preventing the internal liquid or gas from flowing out through the straw 1. At the same time, the straw 1, which is squeezed and moved downward by the upper pressure plate 28, will further press the convection channel 29 located below it. Since the straw 1 is in close contact with the convection channel 29, the convection channel 29 is also completely sealed, and the convection exchange path of internal and external gas or liquid is blocked, thus achieving a double seal on the container.

[0049] When the upper cover 2 needs to be opened, if the locking mechanism is locked, first unlock it, then press the switch button 12. The upper cover 2 will then separate from the lower cover 3 via the latching mechanism. As the upper cover 2 is lifted, the upper pressure plate 28 will disengage from the straw 1. At this time, the straw 1, freed from the pressure of the upper pressure plate 28, will return to its original shape due to its own elasticity, and its suction channel will reopen, allowing the user to easily draw liquid from the inside through the straw 1. Simultaneously, the straw 1 will no longer compress the convection channel 29, which will then become unobstructed, allowing gas or liquid to pass through normally and meeting the user's subsequent needs. In products involving the storage and use of liquids or gases, the convection channel 29 is crucial for maintaining the internal pressure balance of the container. When the user draws liquid through the straw 1, the decrease in liquid will cause a drop in the internal pressure of the container. At this time, the convection channel 29 allows external air to enter, replenishing the gas, balancing the internal and external pressures, and ensuring a smooth drinking process. Without the convection channel 29, as liquid is continuously drawn out, the internal pressure of the container will continue to drop, eventually forming a negative pressure, making it difficult for the straw 1 to draw out liquid. Similarly, in scenarios where internal pressure needs to be released, such as sealed containers for storing fermented foods, the convection channel 29 can release excess gas generated inside in advance when necessary, preventing the container from rupturing due to excessive pressure or preventing hot water vapor from spraying out and scalding people the moment the lid is opened, thus ensuring product safety.

[0050] like Figure 3 As shown, the bottom of the inner cover 4 is fitted with a V-shaped valve sleeve 30 for preventing water leakage at the position corresponding to the flow channel 29.

[0051] like Figure 3 and Figure 4 As shown, another embodiment of this utility model provides a water cup, including a cup body 31, and a cup lid structure with a detachable inner lid as described above. The inner lid 4 is sealed to the mouth of the cup body 31, and the inner lid 4 is threaded to the mouth of the cup body 31. A sealing ring 32 is provided between the inner lid 4 and the mouth of the cup body 31 in the sealed connection. The connection method and structure between the cup lid and the cup body 31 described above are common knowledge in the art and will not be described here.

[0052] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A cup lid structure with a detachable inner lid, characterized in that, include: The cup lid body and the straw (1) include an upper lid (2) and a lower lid (3). One side of the upper lid (2) is hinged to the lower lid (3), and the other side of the upper lid (2) is engaged or disengaged from the lower lid (3). The inner cover (4) is detachably connected to the lower cover (3). The straw (1) passes through the inner cover (4). One side of the inner cover (4) is provided with an elastic buckle (5), and the other side is provided with a fixing protrusion (6). The lower cover (3) is provided with a groove step (7) that engages with the elastic buckle (5). The lower cover (3) is provided with a positioning groove (8) that matches the fixing protrusion (6). The fixing protrusion (6) is inserted into the positioning groove (8), and the elastic buckle (5) is inserted into the groove step (7) so that the inner cover (4) and the lower cover (3) are fastened together.

2. The cup lid structure with a detachable inner lid according to claim 1, characterized in that, The elastic buckle (5) is vertically set on the inner cover (4), and its bottom is connected and fixed to the inner cover (4) and extends upward with a locking hook (9). The locking hook (9) and the groove step (7) cooperate with each other to achieve a fastening connection.

3. The cup lid structure with a detachable inner lid according to claim 1, characterized in that, The lower cover (3) is also provided with a limiting post (10), which is located on the inner side of the lower cover (3). The outer side of the inner cover (4) is provided with a limiting groove (11) that cooperates with the limiting post (10).

4. The cup lid structure with a detachable inner lid according to claim 1, characterized in that, The lower cover (3) is fastened or separated from the upper cover (2) by a fastening mechanism. The fastening mechanism includes a switch button (12) and a return spring (13). The switch button (12) is connected to the lower cover (3) through the return spring (13). The side of the lower cover (3) that is fastened or separated from the upper cover (2) is provided with an installation opening (14). The switch button (12) is located in the installation opening (14). The outer side of the switch button (12) is provided with a hook (15). The inner side of the upper cover (2) is provided with a corresponding retaining ring (16) for fastening with the hook (15).

5. The cup lid structure with a detachable inner lid according to claim 4, characterized in that, The lower cover (3) has a shield (17) covering the position corresponding to the mounting opening (14) for mounting the switch button (12). The switch button (12) is mounted at the mounting opening (14) through the shield (17). The shield (17) has a spring mounting hole (18). The inner side of the switch button (12) has a spring post (19). The reset spring (13) is set between the switch button (12) and the shield (17) through the spring post (19) and the spring mounting hole (18).

6. The cup lid structure with a detachable inner lid according to claim 5, characterized in that, The lower cover (3) is also provided with a locking mechanism, which includes a locking button (20). The locking button (20) is provided with a locking rod (21) for limiting the pressing stroke of the switch button (12). The lower cover (3) is provided with a switch window (22) on one side of the switch button (12). The locking button (20) is located in the switch window (22) and moves within the switch window (22). The switch window (22) is also provided with a mark for identifying locking and unlocking. The locking rod (21) is movably disposed between the switch button (12) and the cover plate (17). The inner side of the switch button (12) is provided with a limiting protrusion (23) that cooperates with the locking rod (21). The locking button (20) moves along the direction of the switch window (22) and drives the locking rod (21) to move between the locked position and the unlocked position. When the locking lever (21) is in the locked position, the locking lever (21) is between the switch button (12) and the blocking piece (17), and abuts against the limiting protrusion (23) to restrict the pressing of the switch button (12); when the locking lever (21) is in the unlocked position, the locking lever (21) and the switch button (12) are offset so that the switch button (12) can be pressed.

7. A cup lid structure with a detachable inner lid according to claim 4, characterized in that, The switch button (12) is provided with a lower hook (24) below it, and the mounting opening (14) is provided with a slot (25) corresponding to the position of the lower hook (24), and the lower hook (24) and the slot (25) are engaged; the switch button (12) is provided with a limiting ring (26) above it, and the lower cover (3) is provided with a limiting pin (27) corresponding to the position of the limiting ring (26).

8. The cup lid structure with a detachable inner lid according to claim 1, characterized in that, The upper cover (2) is also provided with an upper pressure plate (28). The inner cover (4) is provided with a convection channel (29) corresponding to the position of the upper pressure plate (28). When the upper cover (2) is fastened to the lower cover (3), the upper pressure plate (28) presses and deforms the straw (1) to close the suction channel of the straw (1) and at the same time blocks and closes the convection channel (29).

9. A cup lid structure with a detachable inner lid according to claim 4, characterized in that, The bottom of the inner cover (4) is fitted with a V-shaped valve sleeve (30) for preventing water leakage at the position corresponding to the flow channel (29).

10. A water cup, comprising a cup body (31), characterized in that, It also includes a cup lid structure with a removable inner lid as described in any one of claims 1-9, wherein the inner lid (4) is sealed to the mouth of the cup body (31), the inner lid (4) and the mouth of the cup body (31) are connected by threads, and the inner lid (4) is provided with a sealing ring (32) between the sealed connection with the mouth of the cup body (31).

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