Self-locking cup cover and water cup

Abstract

The application belongs to the technical field of water cups, and particularly relates to a self-locking cup cover and a water cup. The self-locking cup cover comprises a self-locking mechanism, a cover body provided with a sliding groove, and a flip cover rotatably installed on the cover body. The flip cover is provided with a first locking hook, and the inner wall of the sliding groove is provided with a first connecting part. The self-locking mechanism comprises a first rotating shaft, an elastic ring, a connecting piece, and a sliding key provided with a second connecting part and a sliding hole. The connecting piece is provided with a rotating hole, a through hole, and a second locking hook matched with the first locking hook. The first rotating shaft passes through the sliding hole and the rotating hole and is connected with the inner wall of the sliding groove, and the sliding key is slidingly installed in the sliding groove. The elastic ring is connected between the first connecting part and the second connecting part passing through the through hole. In the application, the elastic ring can complete the torsion reset and sliding reset of the self-locking mechanism, the number of components of the self-locking mechanism is reduced, the assembly efficiency of the self-locking cup cover is improved, and the manufacturing cost is reduced.

Description

Technical Field

[0001] This invention belongs to the field of water cup technology, and in particular relates to a self-locking cup lid and a water cup. Background Technology

[0002] Water cups are an essential daily necessity. Currently, the market offers many different styles of water cups, and as people's living standards continue to improve, consumers are paying close attention to the safety of their water cups. To prevent high-temperature, high-pressure steam from spraying out of the drinking spout when the lid is opened, a small vent is typically created on the lid before fully opening it. This allows the high-temperature, high-pressure gas inside the cup to escape through this vent, preventing burns to the user when the lid is fully opened.

[0003] In addition, a self-locking mechanism needs to be installed on the cup lid to maintain the stability of the cup lid when it is closed, and to prevent the cup lid from being accidentally opened after it is closed; and the self-locking mechanism can complete the functions of closing and opening the cup lid, improving the user experience of the water cup.

[0004] In existing technologies, self-locking mechanisms typically include a locking button, a spring, and an elastic element. The locking button is mounted on the lid via the spring, and the spring's elastic force keeps the locking button in the locked position even without pressure. The elastic element connects the locking button and the lid to ensure that the lid remains locked when fully engaged by the self-locking mechanism. In summary, existing automatic locking mechanisms typically include two elastic components: an elastic element and the spring. The design of these two components not only increases the difficulty and efficiency of lid assembly but also raises the manufacturing cost of the lid. Summary of the Invention

[0005] This invention addresses the technical problems of low assembly efficiency and high manufacturing cost of cup lids in the prior art by providing a self-locking cup lid and water cup.

[0006] In view of the above technical problems, embodiments of the present invention provide a self-locking cup lid, including a self-locking mechanism, a lid body with a sliding groove, and a flip cover rotatably mounted on the lid body; a first connecting part is provided on the inner wall of the sliding groove, and a first locking hook is provided on the flip cover; the self-locking mechanism includes a first rotating shaft, an elastic ring, a connecting member, and a sliding key with a second connecting part and a sliding hole; the connecting member has a rotating hole, a through hole, and a second locking hook adapted to the first locking hook; the first rotating shaft passes through the sliding hole and the rotating hole and connects to the inner wall of the sliding groove, and the sliding key is slidably mounted in the sliding groove; the elastic ring is connected between the first connecting part and the second connecting part passing through the through hole;

[0007] When the slide key slides along the sliding groove, the tensile elastic force of the elastic ring causes the slide key to slide back to its original position.

[0008] When the slide key drives the connector to rotate around the first rotating shaft, the torsional elastic force of the elastic ring drives the connector to rotate and reset; wherein, when the flip cover is closed on the cover body, the torsional elastic force of the elastic ring keeps the second locking hook in a state of being engaged with the first locking hook.

[0009] Optionally, the connector is provided with a protrusion, the protrusion is provided with the rotating hole, and the elastic element surrounds the protrusion and connects between the first connecting part and the second connecting part.

[0010] Optionally, the flip cover is further provided with a third locking hook, and the connector is further provided with a fourth locking hook that is adapted to the third locking hook;

[0011] When the connector rotates around the first pivot until the third locking hook and the fourth locking hook engage with each other, the self-locking cup lid is in a depressurized state.

[0012] Optionally, the connector includes a rotating part and an adapter arm connected to the rotating part. The through hole, the rotating hole, and the second locking hook are all provided on the rotating part, and the fourth locking hook is provided at the end of the adapter arm away from the rotating part. The adapter arm is used to drive the rotating part to rotate around the first rotating shaft.

[0013] Optionally, the inner wall of the sliding groove is further provided with a limiting protrusion, which is used to restrict the sliding key from rotating around the first rotating axis when the flip cover is closed on the cover body.

[0014] Optionally, the slide key is further provided with an extension arm extending toward the sliding groove, the extension arm being used to drive the slide key to rotate around the first pivot via the first locking hook.

[0015] Optionally, the slide key includes a panel and a first connecting arm and a second connecting arm connected to opposite sides of the panel, both the first connecting arm and the second connecting arm being provided with the sliding hole; the panel is provided with a concave-convex sliding portion on the side opposite to the cover.

[0016] Optionally, the self-locking cup lid further includes a second rotating shaft and a torsion spring sleeved on the second rotating shaft. The flip cover is rotatably mounted on the lid body via the second rotating shaft, and the torsion spring connects the lid body and the flip cover.

[0017] Optionally, the cover is provided with a drinking spout, and the flip cover is provided with a sealing element adapted to the drinking spout, the sealing element being used to seal the drinking spout.

[0018] Another embodiment of the present invention provides a water cup, including a cup body and the above-mentioned self-locking cup lid, wherein the lid body is installed on the cup body.

[0019] In this invention, the elastic ring is connected between the first connecting portion of the cover and the second connecting portion passing through the slide key; when the slide key slides along the sliding groove, the tensile elastic force of the elastic ring causes the slide key to slide back to its original position; specifically, when the slide key is slid downward, the slide key stretches the elastic ring through the second connecting portion; at this time, the elastic ring exerts an upward tensile elastic force on the slide key; when the sliding force on the slide key disappears, the tensile elastic force of the elastic ring will cause the slide key to slide upward along the sliding groove back to its initial state. When the slide key drives the connector to rotate around the first axis, the torsional elastic force of the elastic ring drives the connector to torsionally reset. Specifically, when the slide key rotates along the first axis, since the connector is located inside the slide key, the slide key will drive the connector to rotate along the first axis as well. At this time, the slide key will drive the elastic ring to torsion through the second connecting part, that is, the elastic ring has a torsional elastic force. When the torsional force on the slide key and the connector is eliminated, the torsional elastic force of the elastic ring will cause the connector and the slide key to torsionally reset. Further, when the flip cover is closed on the lid, the connector is twisted until the second locking hook and the first locking hook are engaged, thereby completing the self-locking function of the self-locking cup lid and ensuring the stability of the flip cover closed on the lid. In this invention, the torsional reset and sliding reset of the self-locking mechanism can be completed using only one elastic ring, reducing the number of parts of the self-locking mechanism, thereby improving the assembly efficiency of the self-locking cup lid and reducing its manufacturing cost. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Figure 1 This is a schematic diagram of the self-locking cup lid in the open state according to an embodiment of the present invention;

[0022] Figure 2 This is a cross-sectional view of a self-locking cup lid in the closed state according to an embodiment of the present invention;

[0023] Figure 3 This is a cross-sectional view of the self-locking cup lid sliding key provided in an embodiment of the present invention;

[0024] Figure 4 This is a cross-sectional view of a self-locking cup lid in a depressurized state according to an embodiment of the present invention;

[0025] Figure 5This is a cross-sectional view of a self-locking cup lid in an open state according to an embodiment of the present invention;

[0026] Figure 6 This is a cross-sectional view of a self-locking cup lid provided in an embodiment of the present invention when the first locking hook presses against the second locking hook and the extension arm;

[0027] Figure 7 This is a cross-sectional view of the first and second locking hooks of a self-locking cup lid provided in an embodiment of the present invention when they are engaged with each other.

[0028] Figure 8 This is a partial structural schematic diagram of a self-locking cup lid provided in an embodiment of the present invention;

[0029] Figure 9 This is a schematic diagram of the structure of the lid of a self-locking cup lid provided in an embodiment of the present invention;

[0030] Figure 10 This is a schematic diagram of the structure of the connector of the self-locking cup lid provided in an embodiment of the present invention;

[0031] Figure 11 This is a schematic diagram of the sliding key structure of a self-locking cup lid provided in an embodiment of the present invention.

[0032] The reference numerals in the accompanying drawings are as follows:

[0033] 1. Self-locking mechanism; 11. First rotating shaft; 12. Elastic ring; 13. Connector; 131. Through hole; 132. Second locking hook; 133. Fourth locking hook; 134. Protrusion; 135. Rotating part; 136. Adapter arm; 14. Slide key; 141. Second connecting part; 142. Second sliding hole; 143. Extension arm; 144. Panel; 145. First connecting arm; 146. Second connecting arm; 2. Cover; 21. Sliding groove; 211. First connecting part; 212. Limiting protrusion; 22. Drinking spout; 23. Receiving groove; 3. Flip cover; 31. First locking hook; 32. Third locking hook; 4. Sealing element; 5. Second rotating shaft. Detailed Implementation

[0034] To make the technical problems solved, the technical solutions, and the beneficial effects of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention.

[0035] It should be understood that the terms "upper", "lower", "left", "right", "front", "rear", "middle", 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 the present invention and simplifying the description, and do not indicate or imply that the device 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 of the present invention.

[0036] like Figure 1 and Figure 2 As shown, an embodiment of the present invention provides a self-locking cup lid, including a self-locking mechanism 1, a lid body 2 with a sliding groove 21, and a flip cover 3 rotatably mounted on the lid body 2; a first connecting part 211 is provided on the inner wall of the sliding groove 21, and a first locking hook 31 is provided on the flip cover 3; the self-locking mechanism 1 includes a first rotating shaft 11, an elastic ring 12, a connecting member 13, and a sliding key 14 with a second connecting part 141 and a sliding hole 142; the connecting member 13 is provided with a rotating hole (not shown in the figure), a through hole 131, and a second locking hook 132 adapted to the first locking hook 31; the first rotating shaft 11 passes through the sliding hole 142 and the rotating hole and connects to the inner wall of the sliding groove 21, and the sliding key 14 slides. The elastic ring 12 is installed in the sliding groove 21; the elastic ring 12 is connected between the first connecting part 211 and the second connecting part 141 passing through the through hole 131; it can be understood that the first connecting part 211 is a first hook with its opening facing upward, the second connecting part 141 is a second hook with its opening facing downward, and the elastic ring 12 is connected between the first hook and the second hook; the connecting member 13 is rotatably mounted on the cover 2 by the first rotating shaft 11 passing through the rotating hole; the sliding hole 142 is an elongated hole, and the sliding key 14 is rotatably connected to the cover 2 by the first rotating shaft 11 passing through the sliding hole 142, and the sliding key 14 can slide in the sliding groove 21. Preferably, the elastic ring 12 is a silicone ring.

[0037] When the slide key 14 slides along the sliding groove 21, the tensile elastic force of the elastic ring 12 causes the slide key 14 to slide back to its original position. Specifically, when the slide key 14 slides downward, the slide key 14 stretches the elastic ring 12 through the second connecting part 141. At this time, the elastic ring 12 exerts an upward tensile elastic force on the slide key 14. When the sliding force on the slide key 14 disappears, the tensile elastic force of the elastic ring 12 will cause the slide key 14 to slide upward along the sliding groove 21 to its initial state (initial position in the vertical direction). It should be noted that the initial state is the free state of the slide key 14 when it is not subjected to a sliding force.

[0038] When the slide key 14 drives the connector 13 to rotate around the first rotating shaft 11, the torsional elastic force of the elastic ring 12 drives the connector 13 to rotate and reset; wherein, when the flip cover 3 is closed on the cover body 2, the torsional elastic force of the elastic ring 12 keeps the second locking hook 132 in a state of being engaged with the first locking hook 31. Specifically, when the slide key 14 rotates along the first rotating shaft 11, since the connecting member 13 is located inside the slide key 14, the slide key 14 will drive the connecting member 13 to also rotate along the first rotating shaft 11. At this time, the slide key 14 will drive the elastic ring 12 to twist through the second connecting part 141, that is, the elastic ring 12 has a torsional elastic force. When the torsional force on the slide key 14 and the connecting member 13 is eliminated, the torsional elastic force of the elastic ring 12 will cause the connecting member 13 and the slide key 14 to twist and reset. Further, when the flip cover 3 is closed on the cover body 2, the connecting member 13 is twisted to the state where the second locking hook 132 and the first locking hook 31 are engaged with each other, thereby completing the self-locking operation of the self-locking cup lid and ensuring the stability of the flip cover 3 closed on the cover body 2. It should be noted that when the connector 13 rotates around the first rotating shaft 11, under the action of the tensile elastic force and torsional elastic force of the elastic ring 12, the slide key 14 will slide along the outer surface of the connector 13 and will also rotate around the first rotating shaft 11 together with the connector 13.

[0039] In this invention, the elastic ring 12 is connected between the first connecting part 211 of the cover body 2 and the second connecting part 141 passing through the slide key 14. When the slide key 14 slides along the sliding groove 21, the tensile elastic force of the elastic ring 12 drives the slide key 14 to slide back to its original position. When the slide key 14 drives the connector 13 to rotate around the first rotating shaft 11, the torsional elastic force of the elastic ring 12 drives the connector 13 to torsionally reset. Furthermore, when the flip cover 3 is closed on the cover body 2, the connector 13 is twisted to the state where the second locking hook 132 and the first locking hook 31 are engaged with each other, thereby completing the self-locking function of the self-locking cup lid. In this invention, the torsional reset and sliding reset of the self-locking mechanism 1 can be completed using only one elastic ring 12, reducing the number of components of the self-locking mechanism 1, thereby improving the assembly efficiency of the self-locking cup lid and reducing its manufacturing cost.

[0040] In one embodiment, such as Figure 8 and Figure 10As shown, the connector 13 is provided with a protrusion 134, the protrusion 134 is provided with the rotating hole, and the elastic ring 12 passes around the protrusion 134 and is connected between the first connecting part 211 and the second connecting part 141. Understandably, the protrusion 134 is disposed on the side of the connector 13 facing the sliding groove 21. The middle part of the elastic ring 12 passes around the protrusion 134 and approaches the arc-shaped surface of the slide key 14. Its two ends are respectively connected to the first connecting part 211 and the second connecting part 141, thereby forming a bent part in the middle part of the elastic ring 12 around the first rotating shaft 11. This allows the elastic ring 12 to have a tensile elastic force on the slide key 14 in the vertical direction, as well as a torsional elastic force on the slide key 14 around the first rotating shaft 11. Furthermore, this ensures that the elastic ring 14 is taut between the first connecting part 211 and the second connecting part 141, thereby guaranteeing the tightness and stability of the connection between the elastic ring 12 and the first connecting part 211 and the second connecting part 141.

[0041] In one embodiment, such as Figure 2 and Figure 8 As shown, a limiting protrusion 212 is also provided on the inner wall of the sliding groove 21. The limiting protrusion 212 is used to restrict the sliding key 14 from rotating around the first rotating shaft 11 when the flip cover 3 is closed on the cover body 2. It can be understood that the limiting protrusion 212 is located below the first connecting part 211, and the limiting protrusion 212 is disposed opposite to the second connecting part 141. When the flip cover 3 is closed on the cover body 2, there is a certain gap between the limiting protrusion 212 and the second connecting part 141, so that the sliding key 14 can slide in the sliding groove 21. Due to the limiting effect of the limiting protrusion 212 on the second connecting part 141 and the protrusion 134, the sliding key 14 cannot rotate around the first rotating shaft 11. The sliding key 14 can only rotate around the first rotating shaft 11 after sliding down a certain distance in the sliding groove 21. In this embodiment, the design of the limiting protrusion 212 avoids the accidental opening of the flip cover 3 by the user accidentally touching the slide key 14, causing the slide key 14 to rotate around the first rotating shaft 11. This improves the safety of the self-locking cup lid.

[0042] In one embodiment, such as Figure 4 and Figure 5 As shown, the flip cover 3 is also provided with a third locking hook 32, and the connector 13 is also provided with a fourth locking hook 133 adapted to the third locking hook 32; specifically, the flip cover 3 is provided with a plug arm, the first locking hook 31 and the third locking hook 32 are respectively provided on opposite sides of the plug arm, and the third locking hook 32 is located above the first locking hook 31.

[0043] When the connector 13 rotates around the first pivot 11 until the third locking hook 32 and the fourth locking hook 133 engage, the self-locking cup lid is in a pressure-relieving state. Specifically, when the slide key 14 is pressed to rotate around the first pivot 11, the second locking hook 132 first disengages from the first locking hook 31. The flip cover 3 then rotates further until the third locking hook 32 and the fourth locking hook 133 engage. At this time, the flip cover 3 flips up so that the drinking spout 22 on the lid 2 opens a small pressure-relieving gap, and the high-temperature, high-pressure gas inside the cup is discharged from this gap, thus completing the pressure-relieving function of the self-locking cup lid. The flip cover 3 then rotates further around the lid 2, and the third locking hook 32 disengages from the fourth locking hook 133, causing the self-locking cup lid to be in an open state.

[0044] In one embodiment, such as Figure 8 and Figure 10 As shown, the connector 13 includes a rotating part 135 and an adapter arm 136 connected to the rotating part 135. The through hole 131, the rotating hole, and the second locking hook 132 are all disposed on the rotating part 135. The fourth locking hook 133 is disposed at the end of the adapter arm 136 away from the rotating part 135. The adapter arm 136 is used to drive the rotating part 135 to rotate around the first rotating shaft 11. It can be understood that the adapter arm 136 is connected above the rotating part 135, and the adapter arm 136 abuts against the top of the cover 2. Specifically, when the slide key 14 drives the rotating part 135 to rotate around the first rotating shaft 11, the rotating part 135 will drive the adapter arm 136 to tilt upwards, so that the fourth locking hook 133 is located diagonally above the second locking hook 132; thus, after the first locking hook 31 of the flip cover 3 disengages from the second locking hook 132, the flip cover 3 further rotates until the third locking hook 32 engages with the fourth locking hook 133, thereby ensuring that the self-locking cup lid can be in a pressure-relieved state.

[0045] In one embodiment, such as Figure 8 As shown, the lid 2 is also provided with a receiving groove 23 for accommodating the adapter arm 136. Understandably, the receiving groove 23 is located at the top of the lid 2. When the slide key 14 is in a free state, the adapter arm 136 is located in the receiving groove 23, thereby ensuring the aesthetics of the self-locking cup lid.

[0046] In one embodiment, such as Figure 6 and Figure 11As shown, the slide key 14 is also provided with an extension arm 143 extending toward the sliding groove 21. The extension arm 143 is used to drive the slide key 14 to rotate around the first rotating shaft 11 via the first locking hook 31. Specifically, when the flip cover 3 is closed on the cover body 2, the first locking hook of the flip cover 3 first presses the extension arm 143 downward, so that the slide key 14 drives the connector 13 to rotate around the first rotating shaft 11. The first locking hook 31 then drives the connector 13 to rotate around the first rotating shaft 11 via the extension arm 143, thereby allowing the first locking hook 31 to be inserted into the sliding groove 21 and to maintain a mutually engaged state with the second locking hook 132. That is, the stability of the self-locking cup lid in the closed state is ensured.

[0047] In one embodiment, such as Figure 1 and Figure 11 As shown, the slide key 14 includes a panel 144 and a first connecting arm 145 and a second connecting arm 146 connected to opposite sides of the panel 144. Both the first connecting arm 145 and the second connecting arm 146 are provided with sliding holes 142. The panel 144 has a concave-convex sliding portion on the side opposite to the lid 2. Understandably, the rotating part 135 is located between the first connecting arm 145 and the second connecting arm 146. The slide key 14 can hide the rotating part 135 in the sliding groove 21, thus ensuring the aesthetics of the self-locking cup lid. Furthermore, the concave-convex sliding portion is provided on the outer surface of the panel 144, allowing the user to slide the slide key 14 downwards via the concave-convex sliding portion, thereby improving the user experience of the self-locking cup lid.

[0048] In one embodiment, such as Figure 1 As shown, the self-locking cup lid also includes a second rotating shaft 5 and a torsion spring (not shown) sleeved on the second rotating shaft 5. The flip cover 3 is rotatably mounted on the lid body 2 via the second rotating shaft 5, and the torsion spring connects the lid body 2 and the flip cover 3. Specifically, the lid body 2 is provided with a mounting hole, the torsion spring is installed in the mounting hole, and the opposite ends of the torsion spring are respectively provided with a third connecting arm and a fourth connecting arm. The third connecting arm connects to the lid body 2, and the fourth connecting arm connects to the flip cover 3. The second rotating shaft 5 passes through the torsion spring in the mounting hole and connects to the flip cover 3. It can be understood that when the flip cover 3 is closed on the lid body 2, the torsion spring is in a torsional state; when the first locking hook 31 is disengaged from the second locking hook 132, the torsional elastic force of the torsion spring will cause the flip cover 3 to continue rotating around the second rotating shaft 5 to the open state.

[0049] In one embodiment, such as Figure 2As shown, the lid 2 has a drinking spout 22, and the flip cover 3 has a sealing element 4 adapted to the drinking spout 22. The sealing element 4 is used to seal the drinking spout 22. Understandably, the sealing element 4 includes, but is not limited to, a sealing plug. When the self-locking lid is closed, the sealing element 4 blocks the drinking spout 22; when the self-locking lid is in a depressurized state, the flip cover 3 drives the sealing element 4 to rotate, causing the drinking spout 22 to open a small depressurization gap; when the self-locking lid is open, the sealing element 4 separates from the drinking spout 22 to open the drinking spout 22.

[0050] like Figure 2 As shown, when the flip cover 3 is closed on the lid 2, the first locking hook 31 and the second locking hook 132 engage with each other. The steps for opening this self-locking cup lid in this invention are as follows:

[0051] S101, such as Figure 3 As shown, when the slide key 14 is subjected to a downward sliding force, causing the slide key 14 to slide downward, the slide key 14 stretches the elastic ring 12 through the second connecting part 141. At this time, the elastic ring 12 has an upward tensile elastic force on the slide key 14.

[0052] S102, such as Figure 4 As shown, pressing the lower part of the slide key 14 will cause the slide key 14 to drive the connector 13 to rotate around the first rotating shaft 11. At this time, the slide key 14 drives the elastic ring 12 to twist through the second connecting part 141, so that the elastic ring 12 has a torsional elastic force on the connector 13 and the slide key 14. When the connector 13 rotates around the first rotating shaft 11 until the third locking hook 32 and the fourth locking hook 133 engage with each other, the drinking spout 22 of the cover 2 is opened with a small pressure relief gap, thereby making the self-locking cup lid in a pressure relief state.

[0053] S103, such as Figure 5 As shown, when the pressing and sliding force of the slide key 14 is eliminated, the torsional elastic force of the elastic ring 12 will cause the slide key 14 and the connecting piece 13 to rotate and reset around the first rotating shaft 11; the tensile elastic force of the elastic ring 12 will cause the slide key 14 to slide and reset along the sliding groove 21. Furthermore, the flip cover 3 rotates further due to the torsional force of the torsion spring until the flip cover 3 is fully opened on the cover body 2.

[0054] The self-locking cup lid closing step in this invention is as follows:

[0055] S201, such as Figure 6As shown, the flip cover 3 rotates around the second pivot 5, and the first locking hook 31 on the second flip cover 3 presses against the extension arm 143 of the slide key 14, so that the slide key 14 slides downward along the sliding groove 21; and the first locking hook 31 drives the slide key 14 and the connector 13 to rotate along the first pivot 11 through the extension arm 143; so that the first locking hook 31 is located below the second locking hook 132;

[0056] S202, such as Figure 7 As shown, when the flip cover 3 is fully closed on the cover body 2, the torsional elastic force of the elastic ring 12 causes the slide key 14 and the connector 13 to rotate to the initial state, so that the second locking hook 132 is kept in a state of mutual engagement with the first locking hook 31; the tensile elastic force of the elastic ring 12 causes the slide key 14 to slide to the initial state.

[0057] Another embodiment of the present invention provides a water cup, including a cup body (not shown in the figure) and the aforementioned self-locking lid, wherein the lid 2 is mounted on the cup body. Understandably, the cup body has an external thread, and the lid 2 has an internal thread; the lid 2 is fitted onto the cup body via the threaded connection between the internal thread and the external thread.

[0058] The above are merely embodiments of the self-locking cup lid and water cup of the present invention, and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A self-locking cup lid, characterized in that, The device includes a self-locking mechanism, a cover with a sliding groove, and a flip cover rotatably mounted on the cover. A first connecting portion is provided on the inner wall of the sliding groove, and a first locking hook is provided on the flip cover. The self-locking mechanism includes a first rotating shaft, an elastic ring, a connecting member, and a sliding key with a second connecting portion and a sliding hole. The connecting member has a rotating hole, a through hole, and a second locking hook adapted to the first locking hook. The first rotating shaft passes through the sliding hole and the rotating hole and connects to the inner wall of the sliding groove, and the sliding key is slidably mounted in the sliding groove. The elastic ring connects the first connecting portion and the second connecting portion passing through the through hole. When the slide key slides along the sliding groove, the tensile elastic force of the elastic ring causes the slide key to slide back to its original position. When the slide key drives the connector to rotate around the first rotating shaft, the torsional elastic force of the elastic ring drives the connector to rotate and reset; wherein, when the flip cover is closed on the cover body, the torsional elastic force of the elastic ring keeps the second locking hook in a state of being engaged with the first locking hook.

2. The self-locking cup lid of claim 1, wherein, The connector is provided with a protrusion, and the protrusion is provided with the rotating hole. The elastic element surrounds the protrusion and connects between the first connecting part and the second connecting part.

3. The self-locking cup lid of claim 1, wherein, The flip cover is also provided with a third locking hook, and the connector is also provided with a fourth locking hook that is adapted to the third locking hook; When the connector rotates around the first pivot until the third locking hook and the fourth locking hook engage with each other, the self-locking cup lid is in a depressurized state.

4. The self-locking cup lid according to claim 3, characterized in that, The connector includes a rotating part and an adapter arm connected to the rotating part. The through hole, the rotating hole and the second locking hook are all provided on the rotating part. The fourth locking hook is provided at the end of the adapter arm away from the rotating part. The adapter arm is used to drive the rotating part to rotate around the first rotating shaft.

5. The self-locking cup lid according to claim 1, characterized in that, The inner wall of the sliding groove is also provided with a limiting protrusion, which is used to restrict the sliding key from rotating around the first rotating axis when the flip cover is closed on the cover body.

6. The self-locking cup lid according to claim 1, characterized in that, The slide key is also provided with an extension arm extending toward the sliding groove, and the extension arm is used to drive the slide key to rotate around the first rotating shaft through the first locking hook.

7. The self-locking cup lid according to claim 1, characterized in that, The slide key includes a panel and a first connecting arm and a second connecting arm connected to opposite sides of the panel. The first connecting arm and the second connecting arm are provided with the sliding hole. The panel has a concave-convex sliding part on the side opposite to the cover.

8. The self-locking cup lid according to any one of claims 1 to 7, characterized in that, The self-locking cup lid also includes a second rotating shaft and a torsion spring sleeved on the second rotating shaft. The flip cover is rotatably mounted on the lid body via the second rotating shaft, and the torsion spring connects the lid body and the flip cover.

9. The self-locking cup lid according to any one of claims 1 to 7, characterized in that, The cover is provided with a drinking spout, and the flip cover is provided with a sealing element adapted to the drinking spout, the sealing element being used to seal the drinking spout.

10. A water cup, characterized in that, It includes a cup body and a self-locking cup lid as described in any one of claims 1 to 9, wherein the lid body is mounted on the cup body.

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