Elastic cover and elastic cover cup

Abstract

The invention discloses an elastic cover and an elastic cover cup, the elastic cover comprises a bottom cover and a turning cover, hinge ends of the bottom cover and the turning cover are connected through a hinge assembly arranged in an assembly cavity defined by the bottom cover and the turning cover, the hinge assembly comprises a connecting piece with a first connecting arm and a second connecting arm and a corresponding connecting shaft, the built-in of a hinge structure is realized, and the outline of the cup cover is smooth and compact; the buckling end is provided with a bounce switch and a locking piece capable of locking the action of the bounce switch in a sliding manner, so that mistaken opening can be effectively prevented; the bottom cover is provided with a drinking nozzle with an independent front exhaust hole and a drinking hole, and the bottom cover is matched with a plugging piece at the bottom of the flip cover, so that exhaust and water discharge are performed after the cover is opened, and splashing is prevented; a double-drinking switching mechanism driven by gravity can be arranged below the drinking nozzle, and a suction drinking mode and a direct drinking mode are automatically switched by inclining the cup body. By optimizing the structure, the structural compactness, safety and use convenience of the cup cover are remarkably improved.

Description

Technical Field

[0001] This invention belongs to the field of water cup technology, specifically relating to a spring-loaded lid and a spring-loaded cup. Background Technology

[0002] In traditional flip-top designs, the flip cover and bottom cover are usually connected by an external hinge or simple pivot on the side. While this structure is simple, it often results in noticeable gaps or protrusions in the product's appearance, affecting the compact and streamlined design of the overall flip-top structure. At the same time, the exposed hinge is prone to accumulating dust or being damaged by bumps and knocks, and may loosen after long-term use, affecting the opening and closing feel and lifespan. Summary of the Invention

[0003] The first objective of this invention is to provide a compact spring-loaded cover with a compact structure and an internal hinge component; the second objective of this invention is to provide a spring-loaded cup incorporating the aforementioned spring-loaded cover. To achieve the above objectives, the technical solution adopted by this invention is as follows:

[0004] A spring-loaded cover includes a bottom cover and a flip cover; the flip cover and the bottom cover together define an internal assembly cavity. Both the flip cover and the bottom cover include a hinged end and a snap-fit ​​end disposed opposite each other. The hinged ends of the flip cover and the bottom cover are hinged via a hinge assembly built into the assembly cavity. The hinge assembly includes a connector, a first connecting shaft, and a second connecting shaft. The connector includes a bridging portion and a first connecting arm and a second connecting arm respectively disposed at the upper and lower ends of the bridging portion. The first connecting arm is hinged to the flip cover via the first connecting shaft, and the second connecting arm is hinged to the bottom cover via the second connecting shaft. The snap-fit ​​ends of the flip cover and the bottom cover are detachably snapped together via a spring-loaded switch.

[0005] Preferably, the first connecting shaft passes through the end of the first connecting arm, and its two ends are respectively inserted into two first hinge slots; the second connecting shaft passes through the end of the second connecting arm, and its two ends are respectively inserted into two second hinge slots; the first hinge slot is opened inside the flip cover and does not penetrate the outer wall of the flip cover; the second hinge slot is opened inside the bottom cover and does not penetrate the outer wall of the bottom cover.

[0006] Preferably, both the first and second connecting shafts include two separate pins and an adjusting spring clamped between the two pins. The two pins can move closer together under external force and return to their original position under the action of the adjusting spring, thereby adjusting the overall length of the first and second connecting shafts. This structure gives the connecting shafts a certain degree of adaptive length adjustment capability, facilitates the hinged assembly of the flip cover and the bottom cover, and can buffer the hinge force during use.

[0007] Preferably, the hinge end of the flip cover has a first clearance notch formed on its outer wall, and the hinge end of the bottom cover has a second clearance notch formed on its outer wall; the first clearance notch and the second clearance notch are aligned.

[0008] Preferably, a mounting base is formed on the bottom cover, and the pop-up switch includes a button slidably disposed on the mounting base and a hook extending from the inside of the button toward the flip cover; the inner wall of the flip cover latching end is formed with a protrusion that cooperates with the hook; a return spring is also mounted in the mounting base to keep the pop-up switch in the locked position; a locking member is slidably mounted on the pop-up switch, the locking member having a first position that restricts the movement of the pop-up switch and a second position that can follow the movement of the pop-up switch.

[0009] Preferably, the button includes a slide and a front baffle formed on the front side of the slide. There is a downward-facing groove between the slide and the front baffle. The locking member is a paddle that is slidably assembled in the groove, and its sliding direction is perpendicular to the sliding direction of the pop-up switch.

[0010] Preferably, the mounting base has a retaining edge formed on it to limit the travel of the pop-up switch. The front retaining wall has a limiting edge protruding from the slide block. When the pop-up switch is pressed to its limit position, the limiting edge abuts against the retaining edge. When the paddle is in the first position, it is at least partially blocked between the limiting edge and the retaining edge. When the paddle is in the second position, it is misaligned with the retaining edge and can move with the pop-up switch. By switching the paddle between the first and second positions, the movement of the pop-up switch can be locked and unlocked, preventing accidental opening of the cup lid when carrying or storing it.

[0011] Preferably, the bottom cover is provided with a drinking spout, and the drinking spout has an independent front vent and a drinking hole that are connected to the cup body. The vent outlet is further away from the hinge end of the bottom cover than the drinking hole outlet. When the cover is opened, the vent outlet opens before the drinking hole outlet. The vent outlet is located on the side wall of the drinking spout and is located within the lip coverage area.

[0012] Preferably, the upper end of the side wall of the drinking spout is formed with a sloping wall that facilitates lip contact, and the air outlet is located on the sloping wall.

[0013] Preferably, the front vent includes an axial section extending along the axis of the drinking spout, and a lateral section connecting the upper end of the axial section and extending to the side, with the vent located at the end of the lateral section.

[0014] Preferably, the bottom of the flip cover is equipped with a sealing component, which includes a main body and an extension extending laterally from the main body, the extension extending toward the snap-fit ​​end of the flip cover; the main body is provided with a sealing plug for sealing the water outlet, and the extension is provided with a first sealing head for sealing the air outlet; when the flip cover is opened from the closed state, the first sealing head on the extension first disengages from the air outlet, and then the sealing plug on the main body disengages from the water outlet, thereby achieving early air venting when the cover is opened.

[0015] Preferably, the bottom cover is equipped with a drinking seat, the drinking spout protrudes from the drinking seat, and the drinking seat is also provided with a rear vent that communicates with the cup body; the first connecting arm and the second connecting arm extend in the same horizontal direction, and the bottom of the second connecting arm is formed with a second sealing head for sealing the rear vent when the flip cover is closed.

[0016] Preferably, the bottom of the drinking spout is equipped with a dual-drink switching mechanism, which includes a drinking tube and a gravity seal. The drinking tube extends into the cup body and has an upper port communicating with the drinking spout and a lower port communicating with the cup body. A switching section is provided between the upper and lower ports, and a water inlet is provided on the tube wall of the switching section. The gravity seal is fitted onto the switching section and can slide axially along the switching section by its own weight. The drinking tube has a direct drinking posture and a sucking posture. When the drinking tube is in the sucking posture, the upper port is higher than the lower port, and the gravity seal slides toward the lower port under its own weight and is supported on the limiting structure to keep it in the sealing position to block the water inlet. When the drinking tube is in the direct drinking posture, the upper port is lower than the lower port, and the gravity seal slides toward the upper port under the weight, leaving the sealing position so that the water inlet is at least partially open.

[0017] Preferably, the gravity seal includes a gravity ring that provides gravity, and a sealing rubber that is fitted over the gravity ring. The gravity ring provides the driving force for sliding, while the sealing rubber ensures a sealing effect.

[0018] Preferably, the gravity ring is fitted onto the switching section with its inner wall in a clearance fit with the outer wall of the switching section, and both the outer wall of the switching section and the inner hole of the gravity ring have equal cross-sectional structures, so that the gravity seal can slide along the axial direction of the switching section by its own weight.

[0019] Preferably, the switching section is a hollow body of equal diameter and is located near the upper end of the drinking pipe, and the inner hole of the gravity ring is an equal diameter hole.

[0020] Preferably, the sealing soft adhesive includes a base fitted outside the gravity ring. An upper sealing edge is formed on the inner wall of the upper edge of the base, and a lower sealing edge is formed on the inner wall of the lower edge of the base. Both the upper and lower sealing edges are annular and extend obliquely relative to the base. Both the upper and lower sealing edges form a moderate interference compression with the outer wall of the drinking tube. The inner diameter of both the upper and lower sealing edges is slightly smaller than the outer diameter of the drinking tube switching section, thus forming an interference fit with the outer wall of the drinking tube and generating the contact pressure required for sealing. This configuration ensures a tight seal. During drinking, a negative pressure is formed inside the drinking tube, and the pressure inside the cup provides sealing pressure for the two sealing edges. The frictional resistance provided by the upper and lower sealing edges to the gravity seal is less than the gravity provided by the gravity ring to the gravity seal, ensuring that the gravity seal can slide and change position under gravity.

[0021] Preferably, the limiting structure is a support ring fixedly mounted on the drinking pipe, and the support ring is located below the water inlet. This allows the gravity seal to support the sliding component as it reaches the sealing position.

[0022] Preferably, the distance between the upper and lower sealing edges is greater than the axial height of the water inlet. This design ensures that the upper and lower sealing edges effectively seal the water inlet when the user is in a drinking posture.

[0023] A flip-top cup includes a cup body and a flip-top lid, wherein the bottom lid is fitted onto the opening of the cup body.

[0024] Compared with the prior art, the present invention has the following technical effects:

[0025] By fully integrating the hinge assembly within the assembly cavity formed by the bottom cover and the flip cover, the protruding structure of traditional exposed hinges is eliminated, resulting in a smooth overall contour and a more compact structure for the cup lid. The use of a double connecting arm and double connecting shaft hinge structure, with the connecting shaft inserted into a hinge slot that does not penetrate the outer wall, further enhances the concealment of the hinge assembly. The connecting shaft adopts a telescopic design with a split pin and an adjusting spring, enabling it to adapt to the hinge slot structure that does not penetrate the outer wall, facilitating assembly.

[0026] A sliding locking mechanism is incorporated into the pop-up switch, creating a two-stage locking system that effectively prevents the cup lid from being accidentally opened. When locked, the pop-up switch button is flush with the outer surface of the bottom cover, resulting in an aesthetically pleasing design that also prevents accidental activation, enhancing both safety and convenience of use.

[0027] By setting a front vent on the side of the drinking spout and designing its vent position closer to the snap-fit ​​end than the drinking spout, the front vent opens first when the lid is opened, quickly balancing the air pressure inside and outside the cup. This effectively eliminates the problem of liquid spraying out of the straw due to pressure difference, improving safety. The vent of the front vent is located within the lip's coverage area, and the lips can naturally close it during normal drinking, ensuring the necessary seal for drinking. Combined with the rear vent, it does not affect the smoothness of drinking.

[0028] By incorporating a gravity seal that slides on the water pipe switching section, the drinking mode can be automatically switched according to the user's posture. Utilizing the change in the direction of gravity when the cup is tilted, it achieves the switching between direct drinking and sipping modes without any additional operation, making it convenient to use. The mechanism has a compact structure, few parts, and simple assembly, reducing production costs. At the same time, it avoids the problem of interference between the drinking spouts in traditional dual drinking cups, improving ease of use and user experience. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the spring cover structure in Example 1;

[0030] Figure 2 This is a cross-sectional view of the spring cover in Embodiment 1;

[0031] Figure 3 This is a schematic diagram of the structure of the cover in the open state in Example 1;

[0032] Figure 4 This is a schematic diagram of the bottom cover structure of Example 1;

[0033] Figure 5 This is a schematic diagram of the flip-top structure in Example 1;

[0034] Figure 6 This is a schematic diagram of the bounce switch structure in Example 1;

[0035] Figure 7 This is a schematic diagram of the hinge assembly structure in Example 1;

[0036] Figure 8 This is a schematic diagram of the first connecting shaft and the second connecting shaft in Embodiment 1;

[0037] Figure 9 This is a schematic diagram of the dual-drink switching mechanism in Example 1;

[0038] Figure 10 This is a cross-sectional view of the dual-drink switching mechanism in Example 1;

[0039] Figure 11 This is a schematic diagram of the gravity seal structure in Example 1;

[0040] Figure 12 This is a schematic diagram of the spring-loaded cup structure in Example 2;

[0041] Figure 13 This is a cross-sectional view of the spring-loaded cup in Example 2;

[0042] Markings in the diagram: Bottom cover 1; Flip cover 2; Assembly cavity 3; Connector 6; First connecting shaft 7; Second connecting shaft 8; Bridging part 61; First connecting arm 62; Second connecting arm 63; First hinge groove 21; Second hinge groove 11; Pin 71; Adjusting spring 72; Torsion spring 74; First clearance notch 22; Second clearance notch 12; Bounce switch 9; Assembly seat 13; Button 91; Hook 92; Protrusion 23; Return spring 93; Slide 911; Front baffle 912; Embedded groove 913; Paddle 94; Stop edge 131; Limiting edge 9121; Drink Water spout 14; front vent 141; drinking hole 142; air outlet 1411; against inclined wall 143; sealing component 24; main body 241; extension 242; sealing plug 2411; first sealing head 2421; drinking seat 15; rear vent 151; second sealing head 631; drinking pipe 16; 6 switching section 163; water inlet 164; gravity seal 17; gravity ring 171; sealing soft rubber 172; base 1721; upper sealing contact edge 1722; lower sealing contact edge 1723; support ring 165; cup body 100. Detailed Implementation

[0043] The present invention will be further described below with reference to the embodiments illustrated in the accompanying drawings:

[0044] Example 1, see Figures 1-8 This embodiment discloses a spring cover, which includes a bottom cover 1 and a flip cover 2. The flip cover 2 and the bottom cover 1 together define an internal assembly cavity 3. Both the flip cover 2 and the bottom cover 1 have opposing hinge ends and snap-fit ​​ends.

[0045] The hinged ends of the flip cover 2 and the bottom cover 1 are hinged through a hinge assembly built into the assembly cavity 3. The hinge assembly includes a connector 6, a first connecting shaft 7, and a second connecting shaft 8. The connector 6 has a bridging portion 61, and the upper and lower ends of the bridging portion 61 extend into a first connecting arm 62 and a second connecting arm 63, respectively. The first connecting arm 62 is hinged to the flip cover 2 through the first connecting shaft 7. Specifically, the first connecting shaft 7 passes through a through hole at the end of the first connecting arm 62, and its two ends are respectively inserted into two first hinge slots 21 inside the flip cover 2. The first hinge slots 21 do not penetrate the outer wall of the flip cover 2. The second connecting arm 63 is hinged to the bottom cover 1 through the second connecting shaft 8. The second connecting shaft 8 passes through a through hole at the end of the second connecting arm 63, and its two ends are respectively inserted into two second hinge slots 11 inside the bottom cover 1. The second hinge slots 11 do not penetrate the outer wall of the bottom cover 1. Both the first connecting shaft and the second connecting shaft are equipped with torsion springs 74.

[0046] Both the first connecting shaft 7 and the second connecting shaft 8 adopt an adjustable length design, including two pins 71 and an adjusting spring 72 located between them, which facilitates assembly and has a buffering effect; the outer walls of the hinge ends of the flip cover 2 and the bottom cover 1 are respectively provided with a first clearance notch 22 and a second clearance notch 12 to make room for the flip cover 2 to rotate.

[0047] The flip cover 2 and the bottom cover 1 are connected by a spring switch 9, which allows for a detachable connection. The bottom cover 1 has a mounting base 13. The spring switch 9 includes a button 91 that slides on the mounting base 13 and a hook 92 extending from the inside of the button 91. The inner wall of the flip cover 2 has a protrusion 23 that mates with the hook 92. The mounting base 13 has a return spring 93 that keeps the spring switch 9 in the locked position. At this time, the outer surface of the button 91 does not protrude from the outer contour of the bottom cover 1.

[0048] Button 91 includes a slide 911 and a front baffle 912, forming a groove 913 between them. The paddle 94 is slidably mounted in the groove 913 as a locking element, and its sliding direction is perpendicular to the sliding direction of the pop-up switch 9. The mounting base 13 has a stop edge 131, and the front baffle 912 has a limit edge 9121. When the paddle 94 slides to the first position, its bottom is blocked between the limit edge 9121 and the stop edge 131, restricting the pop-up switch 9 from pressing down and moving. When the paddle 94 slides to the second position, it is offset from the stop edge 131 and can move synchronously with the pop-up switch 9 to realize the opening and closing of the cover.

[0049] The bottom cover 1 is equipped with a drinking spout 14, which has a front vent 141 and a drinking hole 142. The vent 1411 is closer to the snap-fit ​​end 5 than the drinking hole 142. The vent 1411 is located on the inclined wall 143 of the side wall of the drinking spout 14, and includes an axial section and a lateral section. The bottom of the flip cover 2 is equipped with a sealing member 24, which includes a main body 241 and an extension 242. The main body 241 has a sealing plug 2411 for sealing the water outlet, and the extension 242 has a first sealing head 2421 for sealing the vent 1411. When the cover is opened, the first sealing head 2421 disengages first, thus allowing for early venting.

[0050] The bottom cover 1 is also equipped with a water drinking seat 15, with a water nozzle 14 protruding from it. The water drinking seat 15 has a rear vent 151, and the bottom of the second connecting arm 63 is formed with a second sealing head 631, which seals the rear vent 151 when the cover is closed.

[0051] See Figures 9-11 The bottom of the drinking spout 14 is equipped with a dual-drink switching mechanism, which includes a drinking pipe 16 and a gravity seal 17. The drinking pipe 16 has an upper port 161, a lower port 162 and a switching section 163 in between, and the switching section 163 has symmetrical water inlet holes 164.

[0052] The gravity seal 17 includes a gravity ring 171 and a sealing soft rubber 172. The inner hole of the gravity ring 171 is a circular hole of equal diameter, which fits with the outer wall of the drinking pipe 16 with a clearance, allowing the gravity seal 17 to slide axially. The sealing soft rubber 172 includes a base 1721, with an upper sealing contact edge 1722 formed along the inner wall of the base 1721 and a lower sealing contact edge 1722 formed along the inner wall of the base 1721. Both are obliquely extending annular structures that form interference compression with the outer wall of the drinking pipe 16 to provide a seal. However, the frictional resistance provided by the base 17 to the gravity seal 17 is less than the gravity provided by the gravity ring 171 to the gravity seal 17, so as to ensure that the gravity seal 17 can slide under the action of gravity after the posture of the drinking pipe 16 changes. The distance between the upper sealing contact edge 1722 and the lower sealing contact edge 1723 is greater than the axial height of the water inlet hole 164 to ensure the sealing effect.

[0053] When drinking, the cup is upright or slightly tilted. When the drinking tube 16 is in the drinking posture, the upper port 161 of the drinking tube 16 is higher than the lower port 162. The drinking tube 16 is fixed with a support ring 165 below the water inlet 164 as a limiting structure. The gravity seal 17 slides down onto the support ring 165 under the action of gravity. At this time, the water inlet 164 is located between the upper sealing edge 1722 and the lower sealing edge 1723. When drinking, a negative pressure will be formed in the drinking tube 16. The pressure in the cup body will provide sealing pressure for the two sealing edges 1722 and 1723. The two sealing edges 1722 and 1723 cooperate to seal the water inlet 164. Water can only be drawn in from the lower port 162 and can be drunk from the drinking spout 14 connected to the upper port 161.

[0054] When drinking directly, if the cup is tilted or inverted, and the drinking tube 16 is in a direct drinking position, the upper port 161 of the drinking tube 16 is lower than the lower port 162. At this time, the direction of gravity changes, and the gravity seal 17 slides towards the upper port 161 until it is limited by other structures or its own design stroke, exposing the water inlet 164. Water flows into the drinking tube 16 through the water inlet 164 under the action of gravity and can be drunk directly from the drinking spout 14 connected to the upper port 161. The upper end of the drinking tube 16 is equipped with a sealing ring that mates with the drinking spout 14. The entire dual-drinking switching process is completely automatically driven by gravity, requiring no manual operation from the user, making it convenient to use.

[0055] Example 2, see Figure 12 , Figure 13 This embodiment discloses a flip-top cup, which includes a cup body 100 and the aforementioned flip-top, wherein the bottom cover 1 is assembled into the opening of the cup body 100.

[0056] It should be understood that in the claims and description of this invention, all instances of "comprising..." should be understood as having an open-ended meaning, that is, equivalent to "at least comprising...", and should not be understood as having a closed-ended meaning, that is, should not be understood as "only comprising...". The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0057] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention should be covered within the scope of protection of the invention.

Claims

1. A spring-loaded cover, comprising a bottom cover and a flip cover; characterized in that, The flip cover and the bottom cover together define an internal assembly cavity. Both the flip cover and the bottom cover include a hinge end and a fastening end arranged opposite each other. The hinge ends of the flip cover and the bottom cover are hinged through a hinge assembly built into the assembly cavity. The hinge assembly includes a connector, a first connecting shaft, and a second connecting shaft. The connector includes a bridging portion and a first connecting arm and a second connecting arm respectively disposed at the upper and lower ends of the bridging portion. The first connecting arm is hinged to the flip cover through the first connecting shaft, and the second connecting arm is hinged to the bottom cover through the second connecting shaft. The fastening ends of the flip cover and the bottom cover are detachably fastened through a spring switch.

2. The spring cover according to claim 1, characterized in that, The first connecting shaft passes through the end of the first connecting arm, and its two ends are respectively inserted into two first hinge slots. The second connecting shaft passes through the end of the second connecting arm, and its two ends are respectively inserted into two second hinge slots. The first hinge slot is opened inside the flip cover and does not penetrate the outer wall of the flip cover. The second hinge slot is opened inside the bottom cover and does not penetrate the outer wall of the bottom cover.

3. A spring cover according to claim 2, characterized in that, Both the first connecting shaft and the second connecting shaft include two separate pins and an adjusting spring clamped between the two pins. The two pins can move closer to each other under the action of external force and can be reset under the action of the adjusting spring to adjust the overall length of the first connecting shaft and the second connecting shaft.

4. A spring cover according to claim 1, characterized in that, A mounting base is formed on the bottom cover. The pop-up switch includes a button slidably disposed on the mounting base and a hook extending from the inside of the button toward the flip cover. The inner wall of the flip cover's latching end is formed with a protrusion that engages with the hook. A return spring is also mounted in the mounting base to keep the pop-up switch in the locked position. A locking member is slidably mounted on the pop-up switch. The locking member has a first position that restricts the movement of the pop-up switch and a second position that can follow the movement of the pop-up switch.

5. A spring cover according to claim 4, characterized in that, The button includes a slide and a front baffle formed on the front side of the slide, with a downward-facing groove between the slide and the front baffle; the locking element is a paddle slidably mounted in the groove, and its sliding direction is perpendicular to the sliding direction of the pop-up switch; a stop edge is formed on the mounting base to limit the travel of the pop-up switch, and the front baffle has a limiting edge protruding from the slide; when the pop-up switch is pressed to the limit position, the limiting edge abuts against the stop edge; when the paddle is in the first position, it is at least partially blocked between the limiting edge and the stop edge; when the paddle is in the second position, it is misaligned with the stop edge and can move with the pop-up switch.

6. A spring cover according to any one of claims 1-5, characterized in that, The bottom cover is provided with a drinking spout. The drinking spout has an independent front vent and a drinking hole that are connected to the cup body. The vent outlet is further away from the hinge end of the bottom cover than the drinking hole outlet. When the cover is opened, the vent outlet opens before the drinking hole outlet. The vent outlet is located on the side wall of the drinking spout and is located within the lip coverage area.

7. A spring cover according to claim 6, characterized in that, The bottom of the flip cover is equipped with a sealing component, which includes a main body and an extension extending laterally from the main body, the extension extending toward the snap-fit ​​end of the flip cover; the main body is provided with a sealing plug for sealing the water outlet, and the extension is provided with a first sealing head for sealing the air outlet. When the flip cover is opened from the closed state, the first sealing head on the extension part first disengages from the air outlet, and then the sealing plug on the main body part disengages from the water outlet.

8. A spring cover according to claim 7, characterized in that, The bottom cover is equipped with a drinking seat, the drinking spout protrudes from the drinking seat, and the drinking seat is also provided with a rear vent that communicates with the cup body; the first connecting arm and the second connecting arm extend in the same horizontal direction, and the bottom of the second connecting arm is formed with a second sealing head for sealing the rear vent when the flip cover is closed.

9. A spring cover according to claim 6, characterized in that, The bottom of the drinking spout is equipped with a dual-drink switching mechanism, which includes a drinking tube and a gravity seal. The drinking tube extends into the cup body and has an upper port communicating with the drinking spout and a lower port communicating with the cup body. A switching section is provided between the upper and lower ports, and a water inlet is opened on the tube wall of the switching section. The gravity seal is sleeved on the switching section and can slide along the axial direction of the switching section by its own weight. The drinking tube has a direct drinking posture and a sucking posture. When the drinking tube is in the sucking posture, the upper port is higher than the lower port, and the gravity seal ring slides toward the lower port under its own weight and is supported on the limiting structure to keep it in the sealing position to block the water inlet. When the drinking tube is in the direct drinking posture, the upper port is lower than the lower port, and the gravity seal ring slides toward the upper port under the action of gravity, leaving the sealing position so that the water inlet is at least partially open.

10. A spring-loaded cup, characterized in that, The cup includes a cup body and a spring-loaded cap as described in any one of claims 1-9, wherein the bottom cap is fitted onto the opening of the cup body.

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