Patent application title:

WATER CUP HAVING AN EXHAUST PRESSURE RELIEF FUNCTION

Publication number:

US20260138796A1

Publication date:
Application number:

19/417,428

Filed date:

2025-12-12

Smart Summary: A water cup has a special lid with two important openings: one for letting air out and another for pouring water. It includes a movable tube that can change positions. When the tube is in its first position, both openings are closed. Moving the tube to the second position opens the air vent, and moving it to the third position allows water to flow out. This design helps prevent pressure build-up and makes it easier to drink from the cup. 🚀 TL;DR

Abstract:

A water cup (100) having an exhaust pressure relief function, comprising a cup body (10) and a cup lid (20) mounted on an upper end of the cup body, wherein the cup lid is provided with an exhaust port (21) and a water passage port (22) that communicate with an interior of the cup body; the water cup further comprises a water extraction tube (30), the water extraction tube is movably disposed on the cup lid; when the water extraction tube is at a first position, the exhaust port and the water passage port are in a sealed state; when the water extraction tube (30) moves from the first position to a second position, the exhaust port (21) is in an open state; when the water extraction tube (30) moves from the second position to a third position, the water extraction tube communicates with the water passage port (22).

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Classification:

B65D47/32 »  CPC main

Closures with filling and discharging, or with discharging, devices; Closures with discharging devices other than pumps with means for venting

A47G19/2205 »  CPC further

Table service; Drinking vessels or saucers used for table service Drinking glasses or vessels

B65D47/06 »  CPC further

Closures with filling and discharging, or with discharging, devices; Closures with discharging devices other than pumps with pouring spouts or tubes; with discharge nozzles or passages

B65D2205/00 »  CPC further

Venting means

A47G19/22 IPC

Table service Drinking vessels or saucers used for table service

Description

RELATED APPLICATIONS

This application is a continuation application of PCT application No. PCT/CN2023/102760, filed on Jun. 27, 2023, which claims the benefit of priority of Chinese application numbers CN 202310740165.1 filed on Jun. 20, 2023, and the contents of the foregoing documents are incorporated herein by reference in entirety.

TECHNICAL FIELD

The present disclosure relates to the technical field of water cups, and particularly relates to a water cup having an exhaust pressure relief function.

BACKGROUND

Water cups are essential items in people's daily lives. Existing water cups generally consist of a cup body and a cup lid. When the cup body contains hot water, the air inside expands, causing the internal air pressure to increase. Due to the pressure difference between inside and outside, opening the cup lid at this time will cause hot water to spray out, which can cause scalding effects and bring great safety hazards to users.

SUMMARY

Technical Problem

Currently, water cups on the market directly have exhaust holes opened on the cup lid, and gas inside the cup body is directly discharged from the exhaust holes. Although this can avoid the problem of increased pressure in the cup body, it cannot be sealed during use, leading to water leakage, which is inconvenient for users to carry.

Therefore, the existing technology needs to be developed.

Technical solution

In view of the above-mentioned deficiencies of the existing technology, the purpose of the present disclosure is to propose a water cup having an exhaust pressure relief function.

To achieve the above purpose, the present disclosure provides the following technical solution:

The present disclosure provides a water cup having an exhaust pressure relief function, comprising a cup body and a cup lid mounted on an upper end of said cup body, wherein said cup lid is provided with an exhaust port and a water passage port communicating with an interior of said cup body;

    • said water cup further comprises a water extraction tube, said water extraction tube being movably disposed on said cup lid;
    • when said water extraction tube is at a first position, said exhaust port and said water passage port are in a sealed state;
    • when said water extraction tube moves from the first position to a second position, said exhaust port is in an open state;
    • when said water extraction tube moves from the second position to a third position, said water extraction tube communicates with said water passage port.

Further, said water extraction tube is rotatably disposed on said cup lid, rotating said water extraction tube to achieve switching of said water extraction tube among the first position, the second position, and the third position.

Further, said cup lid is provided with a movable window, said movable window comprises a bottom wall and a top wall, said water extraction tube is rotatably connected to said bottom wall and/or said top wall, said exhaust port is located on said bottom wall and faces toward said top wall.

Further, a rotation angle of said water extraction tube is 0 -180 degrees.

Further, when said water extraction tube is at the first position, said water extraction tube is accommodated within said movable window, when said water extraction tube moves from the first position to the second position or the third position, one end of said water extraction tube rotates from inside said movable window to outside said movable window.

Further, said water extraction tube comprises a main body and a tube portion and a connecting portion connected to said main body, said main body is rotatably connected to said cup lid through said connecting portion, said main body is provided with a first through hole and a first blocking portion, said first through hole is used for communicating said tube portion and said water passage port, said first blocking portion is used for blocking said water passage port.

Further, said main body is further provided with a second through hole and a second blocking portion, said second through hole is used for communicating with said exhaust port, said second blocking portion is used for blocking said exhaust port.

Further, said first through hole, said second through hole, said first blocking portion, and said second blocking portion are arranged in an annular spaced distribution along a central axis of said connecting portion.

Further, said water cup further comprises an elastic sealing structure, said elastic sealing structure being disposed at said exhaust port;

    • when said water extraction tube is at the first position, said tube portion applies force to said elastic sealing structure, causing said elastic sealing structure to seal said exhaust port;
    • when said water extraction tube moves from the first position to the second position, said tube portion withdraws the force applied to said elastic sealing structure, causing said elastic sealing structure to open said exhaust port.

Further, said elastic sealing structure comprises a sealing member and an elastic member, said sealing member is installed at said exhaust port, said tube portion applies force to said sealing member to cause said sealing member to seal said exhaust port and to place said elastic member in an energy-storing state, said tube portion withdraws the force applied to said sealing member, said elastic member resets to cause said sealing member to move upward to open said exhaust port.

Further, said water cup further comprises a fan structure, said fan structure being rotatably mounted on said cup lid;

    • said fan structure comprises a bracket, a drive structure, and fan blades, said bracket is rotatably connected to said cup lid, said drive structure is connected to said fan blades and drives said fan blades to rotate, said bracket is provided with an air inlet and an air outlet communicating with said fan blades.

The technical solution of the present disclosure has the following beneficial effects:

The water cup of the present disclosure has an exhaust port and a water passage port communicating with the interior of the cup body provided on the cup lid, and a movable water extraction tube is provided on the cup lid. When a user needs to extract water, the user can first move the water extraction tube from the first position to the second position to open the exhaust port for pressure relief and exhaust, and then move the water extraction tube from the second position to the third position to make the water extraction tube communicate with the water passage port, which can avoid hot water spraying and causing accidental injury to the user, and the user can move the water extraction tube to the first position at any time to simultaneously seal the exhaust port and the water passage port, avoiding water leakage and facilitating user portability.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a structural schematic diagram of the first embodiment of the water cup of the present disclosure;

FIG. 2 is an installation schematic diagram of the water extraction tube and cup lid of the present disclosure;

FIG. 3 is an exploded view of the water cup of the present disclosure;

FIG. 4 is a structural schematic diagram of the water extraction tube of the present disclosure;

FIG. 5 is a structural schematic diagram of the water extraction tube of the present disclosure from another angle;

FIG. 6 is an installation schematic diagram of the water extraction tube and cup lid of the present disclosure;

FIG. 7 is an installation schematic diagram of the fan structure of the present disclosure;

FIG. 8 is an exploded view of the fan structure of the present disclosure;

FIG. 9 is an exploded view of the cup lid of the present disclosure;

FIG. 10 is an installation schematic diagram of the guide tube and water passage port of the present disclosure;

FIG. 11 is a structural schematic diagram of the upper cover of the present disclosure;

FIG. 12 is a usage state diagram of the fan structure of the present disclosure;

FIG. 13 is a structural schematic diagram of the second embodiment of the water cup of the present disclosure;

FIG. 14 is a partial exploded view of FIG. 13.

Reference signs are as follows: 100—water cup, 10—cup body, 11—guide tube, 12—carrying rope, 20—cup lid, 201—clamping block, 202—base body, 203—sealing cover, 21—exhaust port, 22—water passage port, 23—movable window, 231—top wall, 232—bottom wall, 24—accommodating cavity, 25—wiring groove, 26—silicone pad, 27—mounting portion, 28—surrounding baffle, 29—sealing pad, 291—first perforation, 292—second perforation, 30—water extraction tube, 31—main body, 32—tube portion, 33—connecting portion, 34—first through hole, 35—second through hole, 36—first blocking portion, 37—second blocking portion, 38—pressing portion, 39—anti-slip portion, 40—elastic sealing structure, 41—sealing member, 42—elastic member, 50—fan structure, 51—bracket, 511—air inlet, 512—air outlet, 513—front cover, 514—rear cover, 521—main control circuit board, 522—battery, 523—motor, 524—control button, 525—waterproof silicone plate, 526—power cord, 527—wire-pressing member, 53—fan blade, 54—heat-insulating plate, 55—upper cover, 551—window, 552—clamping slot.

DETAILED DESCRIPTION OF EMBODIMENTS

The technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the specific embodiments described herein are only used to explain the present disclosure and are not used to limit the present disclosure. Based on the embodiments of the present disclosure, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present disclosure.

It should be noted that all directional indications in the embodiments of the present disclosure (such as up, down, left, right, front, rear . . . ) are only used to explain the relative positional relationships, motion conditions, etc. between various components under a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

In the present disclosure, unless otherwise clearly specified and limited, the terms “connection”, “fixation” and the like should be understood in a broad sense. For example, “connection” can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

In addition, in the present disclosure, if descriptions such as “first”, “second” are involved, they are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined with “first”, “second” can explicitly or implicitly include at least one of the features.

Please refer to FIGS. 1 to 6, the present disclosure provides a water cup having an exhaust pressure relief function 100, comprising a cup body 10 and a cup lid 20 mounted on an upper end of said cup body 10. The cup body 10 of the present disclosure can preferably adopt a double-layer heat-insulating structure to avoid scalding the user. Said cup body 10 is externally provided with a carrying rope 12 for convenient user portability.

Wherein, said cup lid 20 is provided with an exhaust port 21 and a water passage port 22 communicating with the interior of said cup body 10.

Said water cup 100 further comprises a water extraction tube 30, said water extraction tube 30 being movably disposed on said cup lid 20.

In this embodiment, said water extraction tube 30 can move among a first position, a second position, and a third position.

When said water extraction tube 30 is at the first position, said exhaust port 21 and said water passage port 22 are in a sealed state, which can avoid water leakage problems and facilitate user portability and use.

When said water extraction tube 30 moves from the first position to the second position, said exhaust port 21 is in an open state, while said water passage port 22 is in a sealed state, at this time the gas inside said cup body 10 can be discharged through said exhaust port 21, effectively balancing the air pressure inside and outside said cup body 10, thereby avoiding hot water spraying from said cup body 10 and causing accidental injury to the user.

When said water extraction tube 30 moves from the second position to the third position, said water extraction tube 30 communicates with said water passage port 22, and the user can extract water through said water extraction tube 30.

When a user needs to extract water, the user can first move said water extraction tube 30 from the first position to the second position to open said exhaust port 21 for pressure relief and exhaust, and then move said water extraction tube 30 from the second position to the third position to make said water extraction tube 30 communicate with said water passage port 22, which can avoid hot water spraying and causing accidental injury to the user, and the user can move said water extraction tube 30 to the first position at any time to simultaneously seal said exhaust port 21 and said water passage port 22, avoiding water leakage and facilitating user portability.

As one embodiment, said water extraction tube 30 is rotatably disposed on said cup lid 20, rotating said water extraction tube 30 to achieve switching of said water extraction tube 30 among the first position, the second position, and the third position, which is convenient for user operation.

Of course, said water extraction tube 30 can also be disposed on said cup lid 20 in a linear movement (such as straight-line movement) manner in addition to being rotatably disposed on said cup lid 20, but is not limited thereto, and users can make specific settings according to actual needs.

In this embodiment, a rotation angle of said water extraction tube 30 is preferably 0 -180 degrees. For example, when said water extraction tube 30 rotates to 10 degrees, said exhaust port 21 opens, and when said water extraction tube 30 rotates to 31 degrees, said water passage port opens. That is, the rotation angle of said water extraction tube 30 can be made very small, thereby reducing the space occupied by said water extraction tube 30.

Of course, the movement of said water extraction tube 30 is not limited to rotation, but can also be linear movement, etc.

Further, said cup lid 20 is provided with a movable window 23, said movable window 23 comprises a bottom wall 232 and a top wall 231, said water extraction tube 30 is rotatably connected to said bottom wall 232 and/or said top wall 231, said movable window 23 is used to limit the range of movement of said water extraction tube 30, avoiding excessive rotation. Said exhaust port 21 is located on said bottom wall 232 and faces toward said top wall 231, so that when water vapor inside said cup body 10 is discharged through said exhaust port 21, it will not directly contact the human body, avoiding scalding the user.

In this embodiment, when said water extraction tube 30 is at the first position, said water extraction tube 30 is accommodated within said movable window 23, when said water extraction tube 30 moves from the first position to the second position or the third position, one end of said water extraction tube 30 rotates from inside said movable window 23 to outside said movable window 23. That is to say, when not in use, said water extraction tube 30 is accommodated within said movable window 23, which can avoid damage or contamination of said water extraction tube 30, maintaining cleanliness and hygiene, while facilitating user portability, and when use is needed, said water extraction tube 30 rotates from inside said movable window 23 to outside said movable window 23, facilitating user water extraction and convenient operation.

Please refer to FIG. 4 and FIG. 5, said water extraction tube 30 comprises a main body 31 and a tube portion 32 and a connecting portion 33 connected to said main body 31, said main body 31 is rotatably connected to said cup lid 20 through said connecting portion 33, said main body 31 is provided with a first through hole 34 and a first blocking portion 36, said first through hole 34 is used for communicating said tube portion 32 and said water passage port 22, said first blocking portion 36 is used for blocking said water passage port 22.

In this embodiment, said cup lid 20 is provided with a mounting portion 27 at the top wall 231 of said movable window 23 for mounting connection with said connecting portion 33; said connecting portion 33 preferably adopts a protruding structure, said mounting portion 27 preferably adopts a groove structure, said protruding structure cooperates with said groove structure to connect said water extraction tube 30 and said cup lid 20, facilitating processing and assembly.

In this embodiment, said cup lid 20 is provided with a surrounding baffle 28 at said water passage port 22 and said exhaust port 21, which can avoid displacement when said water extraction tube 30 rotates, improving rotational stability, while enhancing the sealing effect of said water extraction tube 30 on said exhaust port 21 and said water passage port 22 when at the first position; a sealing pad 29 is provided at said exhaust port 21 and said water passage port 22, said sealing pad 29 is provided with a first perforation 291 corresponding to said exhaust port 21 and a second perforation 292 corresponding to said water passage port 22, which can avoid gaps existing from direct contact between said water extraction tube 30 and said cup lid 20, further improving sealing performance.

As a first embodiment, said main body 31 is further provided with a second through hole 35 and a second blocking portion 37, said second through hole 35 is used for communicating with said exhaust port 21, said second blocking portion 37 is used for blocking said exhaust port 21.

When said water extraction tube 30 is at the first position, said first blocking portion 36 blocks said water passage port 22, said second blocking portion 37 blocks said exhaust port 21, avoiding water leakage;

When said water extraction tube 30 is at the second position, said first blocking portion 36 blocks said water passage port 22, said second through hole 35 communicates with said exhaust port 21, facilitating the discharge of gas inside said cup body 10 through said exhaust port 21;

When said water extraction tube 30 is at the third position, said second blocking portion 37 blocks said exhaust port 21, said first through hole 34 communicates said tube portion 32 and said water passage port 22, facilitating the liquid inside said cup body 10 to flow out through said water passage port 22 and said tube portion 32.

Preferably, said first through hole 34, second through hole 35, first blocking portion 36 and second blocking portion 37 are arranged in an annular spaced distribution along a central axis of said connecting portion 33, that is, the first through hole 34, second through hole 35, first blocking portion 36, second blocking portion 37 and connecting portion 33 of the present disclosure are adjacently arranged, with a compact and small structure, said water extraction tube 30 only needs to rotate a very small angle to achieve the opening or closing of said exhaust port 21 and said water passage port 22.

Further, said water extraction tube 30 further comprises a pressing portion 38, by applying force to said pressing portion 38, the user can rotate said water extraction tube 30 without touching said tube portion 32, avoiding contamination. Said pressing portion 38 is provided with an anti-slip portion 39, such as anti-slip protrusions, which can improve the friction between the user's hand and said water extraction tube 30, facilitating force application, making it easy and effortless, and avoiding slipping.

As a second embodiment, please refer to FIG. 13 and FIG. 14, said water cup 100 further comprises an elastic sealing structure 40, said elastic sealing structure 40 being disposed at said exhaust port 21;

    • when said water extraction tube 30 is at the first position, said tube portion 32 applies force to said elastic sealing structure 40, causing said elastic sealing structure 40 to seal said exhaust port 21;
    • when said water extraction tube 30 moves from the first position to the second position, said tube portion 32 withdraws the force applied to said elastic sealing structure 40, causing said elastic sealing structure 40 to open said exhaust port 21.

Compared with the first embodiment, the difference of the second embodiment lies in the arrangement of said exhaust port 21 and the structure for sealing said exhaust port 21, and the second embodiment has better sealing performance for said exhaust port 21.

Specifically, said elastic sealing structure 40 comprises a sealing member 41 and an elastic member 42, said sealing member 41 is elastically installed at said exhaust port 21 through said elastic member 42, said tube portion 32 applies force to said sealing member 41 to cause said sealing member 41 to seal said exhaust port 21 and to place said elastic member 42 in an energy-storing state, said tube portion 32 withdraws the force applied to said sealing member 41, said elastic member 42 resets to cause said sealing member 41 to move upward to open said exhaust port 21, thereby achieving automatic opening, facilitating user use.

In this embodiment, said cup body 10 is internally provided with a guide tube 11, an upper end of said guide tube 11 communicates with said water passage port 22, a lower end of said guide tube 11 extends to a bottom of said cup body 10. After the hot water inside said cup body 10 has cooled down, the user can directly drink the water inside said water cup 100 through said water extraction tube 30 and said guide tube 11, facilitating user use. Of course, the user can also pour out the water inside said cup body 10 through said water extraction tube 30 for use.

Please refer to FIG. 7 to FIG. 12, said water cup 100 further comprises a fan structure 50, said fan structure 50 being rotatably mounted on said cup lid 20;

    • said fan structure 50 comprises a bracket 51, a drive structure and fan blades 53, said bracket 51 is rotatably connected to said cup lid 20, said drive structure is connected to said fan blades 53 and drives said fan blades 53 to rotate, said bracket 51 is provided with an air inlet 511 and an air outlet 512 communicating with said fan blades 53.

Said drive structure comprises a main control circuit board 521, a battery 522 and a motor 523, said battery 522 and motor 523 are respectively electrically connected to said main control circuit board 521, said fan blades 53 are fixedly connected to an output shaft of said motor 523. Said main control circuit board 521 is further provided with a control button 524 for controlling the on/off of said fan structure 50, said control button 524 is exposed on a surface of said cup lid 20, facilitating user control of the on/off of said fan structure 50.

When said fan structure 50 is not in use, said fan structure 50 can be rotated to fit against the surface of said cup lid 20, with a compact structure, facilitating portability; when said fan structure 50 needs to be used, said fan structure 50 is rotated to a preset angle, so that said fan structure 50 can blow air toward the user for cooling (as shown in FIG. 12).

Further, said bracket 51 comprises a front cover 513 and a rear cover 514, said front cover 513 is provided with said air outlet 512, said rear cover 514 is provided with said air inlet 511.

In this embodiment, said cup lid 20 comprises a base body 202 and a sealing cover 203, said base body 202 and sealing cover 203 are snap-connected to form an accommodating cavity 24, said main control circuit board 521 and said battery 522 are installed within said accommodating cavity 24, said sealing cover 203 is provided with a wiring groove 25 communicating with said accommodating cavity 24, said wiring groove 25 is disposed at the rotational connection end between said bracket 51 and said cup lid 20, facilitating the power cord 526 of said fan blades 53 to pass through and enter said accommodating cavity 24 for electrical connection with said main control circuit board 521, providing reasonable wiring and avoiding interference of said power cord 526 with the rotation of said fan structure 50.

In this embodiment, said fan structure 50 further comprises a wire-pressing member 527 for pressing and fixing said power cord 526 to prevent displacement of said power cord 526.

Said cup lid 20 is further provided with a waterproof silicone plate 525 and a heat-insulating plate 54, said waterproof silicone plate 525 is disposed at said sealing cover 203 to prevent water ingress, said heat-insulating plate 54 is disposed at the bottom of said battery 522 and said main control circuit board 521 to avoid excessive liquid temperature inside said cup body 10 from affecting the service life of said main control circuit board 521 and said battery 522.

Said cup lid 20 is provided with a silicone pad 26 at the rotational connection end with said bracket 51 for pressing against the bottom of the rotational end of said fan structure 50, so that said fan structure 50 is fixed at a certain angle and is not easily shaken.

In this embodiment, said fan structure 50 further comprises an upper cover 55, when said fan structure 50 is folded to fit against said cup lid 20, said upper cover 55 covers said fan structure 50 externally, providing a compact structure and facilitating user portability; said upper cover 55 is provided with a window 551 corresponding to said movable window 23 to avoid interference with the rotation of said water extraction tube 30.

Preferably, the periphery of said cup lid 20 is provided with clamping blocks 201, the inner wall of said upper cover 55 is provided with clamping slots 552, said clamping blocks 201 cooperate with said clamping slots 552 to fix said cup lid 20 and said upper cover 55, making disassembly and assembly convenient and quick.

When said fan structure 50 is not needed, said upper cover 55 covers said cup lid 20 to avoid damage to said fan structure 50; when said fan structure 50 needs to be used, said upper cover 55 can be removed and said fan structure 50 can be rotated to a preset angle.

The above-mentioned embodiments of the present disclosure are merely examples for clearly illustrating the present disclosure and are not limitations on the implementation methods of the present disclosure. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is impossible to exhaustively list all implementation methods here. Any obvious changes or variations derived from the technical solutions of the present disclosure are still within the scope of protection of the present disclosure.

Claims

1. A water cup having an exhaust pressure relief function, comprising a cup body and a cup lid mounted on an upper end of said cup body, characterized in that said cup lid is provided with an exhaust port and a water passage port communicating with an interior of said cup body;

said water cup further comprises a water extraction tube, said water extraction tube being movably disposed on said cup lid;

when said water extraction tube is at a first position, said exhaust port and said water passage port are in a sealed state;

when said water extraction tube moves from the first position to a second position, said exhaust port is in an open state;

when said water extraction tube moves from the second position to a third position, said water extraction tube communicates with said water passage port;

said water extraction tube is rotatably disposed on said cup lid, rotating said water extraction tube to achieve switching of said water extraction tube among the first position, the second position, and the third position;

characterized in that said water extraction tube comprises a main body and a tube portion and a connecting portion connected to said main body, said main body is rotatably connected to said cup lid through said connecting portion, said main body is provided with a first through hole and a first blocking portion, said first through hole is used for communicating said tube portion and said water passage port, said first blocking portion is used for blocking said water passage port.

2. The water cup according to claim 1, characterized in that said main body is further provided with a second through hole and a second blocking portion, said second through hole is used for communicating with said exhaust port, said second blocking portion is used for blocking said exhaust port.

3. The water cup according to claim 2, characterized in that said first through hole, said second through hole, said first blocking portion, and said second blocking portion are arranged in an annular spaced distribution along a central axis of said connecting portion.

4. The water cup according to claim 1, characterized in that said water cup further comprises an elastic sealing structure, said elastic sealing structure being disposed at said exhaust port;

when said water extraction tube is at the first position, said tube portion applies force to said elastic sealing structure, causing said elastic sealing structure to seal said exhaust port;

when said water extraction tube moves from the first position to the second position, said tube portion withdraws the force applied to said elastic sealing structure, causing said elastic sealing structure to open said exhaust port.

5. The water cup according to claim 4, characterized in that said elastic sealing structure comprises a sealing member and an elastic member, said sealing member is installed at said exhaust port, said tube portion applies force to said sealing member to cause said sealing member to seal said exhaust port and to place said elastic member in an energy-storing state, said tube portion withdraws the force applied to said sealing member, said elastic member resets to cause said sealing member to move upward to open said exhaust port.