CN218246681U - Lid body exhaust button anti-loosening structure, cup lid and cup - Google Patents

Abstract

The utility model discloses a lid exhaust button locking takes off structure, bowl cover and cup. The exhaust valve comprises an exhaust key and a valve rod, wherein a key perforation is arranged on the exhaust key, a thread screw head is arranged at the upper end of the valve rod, a retaining platform is arranged at the lower end of the thread screw head on the valve rod, the thread screw head penetrates through the key perforation and extends upwards, the retaining platform is abutted against the lower part of the key perforation, and at least the part extending upwards on the thread screw head is provided with a thread and is tightly connected with the thread screw head through a fastening nut; and a rotation stopping structure is also arranged between the exhaust key and the valve rod. The utility model also discloses a bowl cover and a cup. The technical scheme has the beneficial effects that: the exhaust button can not rotate relatively after being connected with the valve rod, so that when the exhaust button is pressed, the exhaust button can be firmly combined with the valve rod and is not easy to loosen. In addition, the automatic assembling device has the advantages of low failure rate, durability, simplicity and convenience in assembly, suitability for automatic assembly line assembly, capability of greatly improving the production efficiency and the like.

Description

Lid body exhaust button anti-loosening structure, cup lid and cup

Technical Field

The utility model relates to a sealed field and drinking water tea set technical field, concretely relates to lid exhaust button locking take off structure, bowl cover and cup.

Background

The cup cover with the exhaust device is generally a technical scheme designed and produced for preventing the problem of water overflow when the tea-water separation cup is opened and the problem that the vacuum cup is not easy to open due to negative pressure after being cooled.

The technical proposal of the cup cover with the exhaust valve device is disclosed in two Chinese patent documents, namely a double-layer glass cup with tea water isolation function (application number 201520383259.9) and a tea water separation cup (application number 201821055952.3). The technical scheme is characterized in that: the top cover comprises a top cover body and an exhaust device, the top of the inner side of the top cover body is provided with an exhaust bin which extends into the cup body, and the wall of the exhaust bin is provided with an exhaust channel communicated with the cup body; the exhaust device is arranged in the center of the top cover body and comprises a spring shaft, a key and a fastening nut. After the tea water is separated, the tea water enters the tea water bin to generate certain hot air pressure, and if the top cover is opened immediately without exhausting and releasing pressure, the tea water is easily sprayed out under the action of the hot air pressure, so that the exhaust device is arranged in the center of the top cover. When the tea is drunk, if a user presses a key in the exhaust device by hand when the top cover is suddenly opened, the exhaust channel is opened, and hot air in the cup can be exhausted along the exhaust channel on the wall of the exhaust bin, so that the effects of exhausting and relieving pressure are achieved. When the hot air pressure in the cup is discharged, the top cover is unscrewed, and the tea can be drunk.

Therefore, the cup cover has the function of releasing the pressure of gas in the cup, and particularly can be used for being provided with a tea-water separation cup with tea placed at the bottom, so that the risk that hot air at the bottom impacts tea water to overflow the cup opening when the cup cover is opened can be avoided.

However, the technical scheme at least has the following defects in the actual production and use processes of the product:

1. the sealing effect is poor, and the failure rate is high. According to the scheme, the nut is in threaded connection with the spring shaft, the sealing valve plate is pressed, and then the sealing valve plate is pressed by the elastic force of the spring to realize sealing. Like this, the roughness of sealing valve piece and the clearance size of centre bore, the eccentricity of fastening nut screw hole and the roughness of bottom surface and the concentricity of spring shaft (valve rod) silk head all can produce great influence to the leakproofness, and the deviation appears in an accessory can cause the bowl cover infiltration promptly, especially when the splendid attire hot water.

2. The button and the spring shaft are easy to loosen. Because of above-mentioned technical scheme is that spring shaft and button pass through screw thread lug connection, in the use of repeatedly pressing, because of the eccentric action of impetus, very easily cause button and spring shaft pine to take off.

3. The assembly is complicated, time-consuming and labor-consuming. Because of the spring shaft (valve rod) is the cylinder, do not have screens from top to bottom and spline, no matter assemble the button still install the nut and all take time and take a lot of work, and the tightness is difficult to the accurate control moreover.

Disclosure of Invention

In order to overcome the defects in the prior art, the utility model aims to provide a lid body air exhaust button anti-loosening structure, a cup cover and a cup, which are used for solving the technical problem that the air exhaust button and a spring shaft are easy to loosen.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the cover body exhaust key anti-loosening structure comprises an exhaust key and a valve rod, wherein a key through hole is formed in the exhaust key, a threaded screw head is arranged at the upper end of the valve rod, a blocking platform is arranged at the lower end, located at the threaded screw head, of the valve rod, the threaded screw head penetrates through the key through hole and extends upwards, the blocking platform abuts against the lower side of the key through hole, and at least the part, extending upwards, of the threaded screw head is provided with threads and is connected with the threaded screw head in a pressing mode through a fastening nut; and a rotation stopping structure is also arranged between the exhaust key and the valve rod.

Optionally, the key through hole is located in the center of the exhaust key.

Optionally, the diameter of the threaded screw head is smaller than that of the valve rod, and the stop table is formed at the joint of the threaded screw head and the valve rod.

Optionally, at least one portion of the valve rod is a rotation stopping rod section, the cross section of the rotation stopping rod section is non-circular, the cross section is divided into a large diameter portion and a small diameter portion, a rotation stopping piece corresponding to the small diameter portion is arranged on the exhaust key, the rotation stopping piece limits the exhaust key to rotate around the valve rod in the radial direction, and the rotation stopping piece and the rotation stopping rod section form the rotation stopping structure.

Optionally, the section of the rotation stopping rod section has at least one flat side, the small diameter portion is formed at the flat side, and the rest of the section is the large diameter portion.

Optionally, the cross-section of the rotation stop lever section has two opposite flat sides.

Optionally, the rotation stopping piece is provided with a rotation stopping plane corresponding to the straight edge.

Optionally, the valve rod is rotated to enable the screwing direction of the fastening nut to be the screwing direction, otherwise, the screwing direction is the screwing direction, and the rotation stopping piece is close to the straight edge on one side of the screwing direction and is far away from the straight edge on one side of the screwing direction.

Optionally, the rotation stopping member has an inclined surface, and when the large diameter portion falls onto the rotation stopping member, the inclined surface can guide the large diameter portion to move along the inclined surface, so that the large diameter portion and the rotation stopping member are not overlapped in the vertical direction.

Optionally, a positioning sleeve is arranged below the exhaust key, and the rotation stopping piece is arranged on the inner wall of the positioning sleeve.

The bowl cover, including foretell lid exhaust button locking structure of taking off, still include main lid and spring, the spring is set up to provide ascending elasticity to the valve rod, be equipped with main lid on the main lid and perforate, the valve rod passes main lid is perforated, the lower extreme of valve rod is provided with the head that the diameter is greater than the valve rod, be equipped with the sealing member between head and the main lid, under the normality, under the spring action, the valve rod drives the head compresses tightly the sealing member keeps apart the space about the main lid, and when pressing the exhaust button, the valve rod moves down, drives the head and leaves main lid, the space about the main lid of intercommunication.

Optionally, the spring is sleeved on the valve rod, and the upper end and the lower end of the spring are respectively connected with the exhaust key and the main cover body.

Optionally, the portable electronic device further comprises a top cover, wherein the top cover is fixedly connected above the main cover body or is formed by upwards extending the periphery of the main cover body.

Optionally, the exhaust key is disposed in a pressing cavity, the pressing cavity is adapted to an outer diameter of the exhaust key, and the pressing cavity is disposed on the top cover.

Optionally, the lower end of the pressing cavity is provided with a limiting clamping table which has a limiting effect on descending of the exhaust key.

Optionally, a top cover tab is arranged on the top surface of the exhaust key.

Optionally, the outer circumferential surface of the main cover body is provided with a decorative sleeve.

The cup is provided with the cup cover.

The technical scheme has the beneficial effects that: the exhaust button is unable relative rotary motion after being connected with the valve rod, consequently when pressing the exhaust button, can guarantee that the exhaust button combines firmly with the valve rod, is difficult for the pine to take off. In addition, the automatic assembling device has the advantages of low failure rate, durability, simplicity and convenience in assembly, suitability for automatic assembly line assembly, capability of greatly improving the production efficiency and the like.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is an exploded view of the lid of the present invention;

FIG. 2 is a structural view of the cup cover of the present invention;

FIG. 3 is a structural view of the main cover of the present invention;

FIG. 4 is a top view of FIG. 3;

FIG. 5 is an enlarged view of portion A of FIG. 4;

FIG. 6 is a perspective view of FIG. 4;

FIG. 7 is a block diagram of the top cover of the present invention;

FIG. 8 is a top view of FIG. 7;

FIG. 9 is a bottom view of FIG. 7;

FIG. 10 is a perspective view of FIG. 7;

FIG. 11 is a block diagram of the seal of the present invention;

FIG. 12 is a top view of FIG. 11;

FIG. 13 is a bottom view of FIG. 11;

FIG. 14 is a perspective view of FIG. 11;

FIG. 15 is a block diagram of the valve stem of the present invention;

FIG. 16 is a front view of FIG. 15;

FIG. 17 is a perspective view of FIG. 15;

FIG. 18 is a cross-sectional view of a portion of a detent lever segment;

fig. 19 is a structural view of an exhaust button of the present invention;

FIG. 20 is a top view of FIG. 19;

FIG. 21 is a bottom view of FIG. 19;

FIG. 22 is an enlarged view of portion B of FIG. 21;

FIG. 23 is a perspective view of FIG. 19;

FIG. 24 is a view of the structure of the cup of the present invention;

fig. 25 is a structural view of a cup according to another example of the present invention.

Description of reference numerals:

a valve stem 1; a valve stem body 11; a blocking table 111; a threaded head 12; a seal head 13; a sealing surface 131; a rotation stop lever section 14; a large diameter portion 141; a small diameter portion 142; a flat side 143;

a main lid body 2; a main cover through hole 21; an exhaust groove 22; a seal 23; a nest 231; a groove 232; an accommodating chamber 24; a caulking groove 25; a second sealing gasket 26;

an exhaust button 3; a key through hole 31; a rotation stop member 32; a rotation stop plane 321; a bevel 322; a positioning sleeve 33; a top cover tab 34; a yarn tightening direction a and a yarn loosening direction b;

a spring 4;

a fastening nut 5;

a top cover 6; a pressing chamber 61; a limit clamp 62;

an inner steel jacket 7;

fixing the welding ring 8;

and a decorative sleeve 9.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar parts or parts having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

Example 1 valve stem 1

As shown in fig. 15 to 18, the valve stem 1 includes a valve stem body 11, a threaded head 12 is provided at an upper end of the valve stem body 11, and a sealing head 13 having a diameter larger than that of the valve stem body 11 is provided at a lower temple of the valve stem body 11.

Wherein at least a portion of the valve stem body 11 has a stopper rod segment 14. The rotation stop rod section 14 is non-circular in cross-section, thereby having a rotation stop function. The rotation stop rod section 14 has a cross section divided into a large diameter portion 141 and a small diameter portion 142 by a length from the axial center. The screw head 12 is adapted to be pierced through the top cover 6 and extend upwardly, and at least the upwardly extending portion of the screw head 12 is provided with a thread. The valve stem 1 is provided with a stop 111 at the lower end of the threaded head 12 for limiting the penetration of the cap 6. The lower end of the valve rod body 11 is provided with a sealing head 13 with a diameter larger than that of the valve rod body 11, and the sealing head 13 is provided with a sealing surface 131 matched with the sealing element 23.

In this embodiment, the sealing head 13 is used to isolate or block the space on the upper and lower sides of the main cover body 2, i.e. to seal the channel of the space on the upper and lower sides of the main cover body 2, which can be embodied as the exhaust slot 22 in embodiment 2. The threaded head 12 is used to pass through the venting button 3 and is screwed in by means of the fastening nut 5, and the abutment 111 is used to position the venting button 3 from below. Therefore, when the fastening nut 5 presses and fastens the exhaust button 3 and the valve rod 1, the valve rod main body 11 with a non-cylindrical structure cannot rotate in the main cover body through hole 21, great convenience is brought to nut screwing, and the automatic nut locking machine is particularly suitable for assembly.

As a specific example, the section of the rotation stop lever section 14 has at least one flat side 143, the small diameter portion 142 is formed at the flat side 143, and the rest is the large diameter portion 141. Advantageously, the section of the rotation stop bar segment 14 has two opposite straight edges 143. That is, the valve stem body 11 is partially of a non-cylindrical dihedral or polyhedral structure (preferably dihedral).

Specifically, the outer surface of the end socket 13 is an arc surface or a plane, and the inner surface (i.e., the sealing surface 131) is a plane or a conical surface adapted to the shape of the sealing element 23.

As a specific example, the end cap 13 of the valve stem 1, the valve stem body 11 and the threaded head 12 are formed as a single piece, which facilitates the guarantee of the machining precision, and therefore, the sealing effect and the pressing operation comfort can be better guaranteed. Of course, the sealing head 13 may also adopt the nut connection method in the background art.

As a specific example, the diameter of the screw head 12 is smaller than the diameter of the valve stem 1, and the stop 111 is formed at the connection of the screw head 12 and the valve stem 1.

The diameter of the present invention refers to the maximum distance between any two points in a plane closed figure, which is called the "diameter" of the figure, and is not specifically referring to the diameter of a circle.

EXAMPLE 2 cup lid

As shown in fig. 1-23, the cup lid includes the valve stem 1 of embodiment 1, and further includes:

the main cover body 2 is provided with a main cover body through hole 21 matched with the section shape and size of the rotation stopping rod section 14 on the main cover body 2. The valve stem 1 is clearance fitted to the main cap penetration hole 21 and is slidable up and down therein, but is not rotatable. At least one exhaust groove 22 is formed on the side wall of the main cover body through hole 21. The valve rod 1 passes through the main cover body through hole 21, and a sealing member 23 is arranged between the end enclosure 13 and the main cover body 2.

The exhaust button 3 is provided with a button through hole 31 matched with the thread section at the upper end of the valve rod 1. The threaded head 12 of the valve rod 1 passes through the key through hole 31 and extends upwards, and is connected with the key through the fastening nut 5 in a pressing mode;

spring 4, spring 4 are set up to provide ascending elasticity to valve rod 1, and under the effect of spring 4, head 13 and sealing member 23 keep apart the space about main lid 2, and when pressing down exhaust button 3, valve rod 1 drives head 13 downstream, the space about the main lid 2 of intercommunication.

Exhaust button 3 and spring 4 constitute the exhaust driving piece jointly, and the exhaust driving piece links to each other with valve rod 1, drives valve rod 1 and reciprocates along main lid perforation 21.

The sealing element 23 is a first sealing washer, the sealing element 23 is connected below the main cover body perforation 21, the sealing surface 131 is pressed on the sealing element 23 in a normal state to isolate the space above and below the main cover body 2, and when the valve rod 1 moves downwards, the sealing surface 131 is driven to leave the sealing element 23 to communicate the space above and below the main cover body 2. The first sealing washer may also be fitted over the valve stem 1 and cooperate with the sealing surface 131 to move up and down with the valve stem 1 during use for sealing the gap around the exhaust slot 22 and the main cap bore 21. The lower part of the main cover body 2 is provided with an accommodating cavity 24, the sealing element 23 is positioned in the accommodating cavity 24, and the lower plane of the sealing element 23 is flush with the adjacent part of the lower plane of the main cover body 2, so that the sealing element 23 is conveniently nested in the accommodating cavity 24, the falling-off of the sealing element is prevented, and meanwhile, the inner steel sleeve 7 is more attractive and convenient to install. Furthermore, an embedding groove 25 is formed below the main cover body 2, and an embedding platform 231 matched with the embedding groove 25 is arranged above the sealing element 23, so that the sealing element 23 is not easy to fall off when the main cover body 2 with the sealing element 23 mounted moves in the cup cover assembling process. Further, an inner steel sleeve 7 is arranged below the main cover body 2, the inner steel sleeve 7 is provided with a through hole matched with the size of the end socket 13 of the valve rod 1, and the inner steel sleeve is sleeved on a boss in the main cover body 2 and is fixedly connected with the main cover body 2 through a fixed welding ring 8. The sealing member 23 is held between the main cover 2 and the inner steel sleeve 7, and the inner steel sleeve 7 presses and fixes the sealing member 23. The inner steel sleeve 7 plays the role of fixation and beauty. The lower end of the sealing element 23 is provided with a groove 232 matched with the seal head 13, the seal head 13 is wholly or partially positioned in the groove 232 in a normal state, and the side wall of the groove 232 can play a certain sealing role and can also play an attractive role.

As a specific example, the main cover 2 has a cavity above the main cover 2, the spring 4 is disposed in the cavity of the main cover 2 and is sleeved on the valve stem body 11, the lower end of the spring 4 abuts against the main cover 2, and the upper end abuts against the exhaust button 3, and the elastic force is set to make the sealing head 13 of the valve stem 1 abut against the sealing member 23. When the cup body is inverted, hot water in the cup cannot overflow from the through hole 21 of the main cover body, and when higher negative pressure is generated in the cup, external atmosphere can enter the cup.

Still include top cap 6, top cap 6 is through connecting buckle fixed connection in the top of main lid 2, and perhaps, top cap 6 is upwards extended by main lid 2 all around and is formed, and exhaust button 3 is set up in one presses the chamber 61, should press chamber 61 and exhaust button 3's external diameter size adaptation, presses chamber 61 to set up on top cap 6's centre bore department. The lower end of the pressing cavity 61 is provided with a limit clamping table 62 which has a limit function on the descending of the exhaust key 3.

The exhaust key 3 is provided with a rotation stopping member 32 (or rotation stopping rib) corresponding to the small diameter portion 142, and when the valve rod 1 rotates around the axis thereof, the rotation stopping member 32 blocks the large diameter portion 141 to limit the exhaust key 3 to rotate around the valve rod 1 in the radial direction. Therefore, the exhaust key 3 cannot rotate relatively after being connected with the valve rod 1, and when the exhaust key 3 is pressed, the exhaust key 3 and the valve rod 1 can be firmly combined and are not easy to loosen.

When the section of the rotation stopping rod section 14 has at least one flat side 143, the rotation stopping piece 32 has a rotation stopping plane 321 corresponding to the flat side 143. Advantageously, the valve rod 1 is rotated to enable the screwing direction of the fastening nut 5 to be a screwing direction, and conversely, the screwing direction is a screwing direction, after the cup cover is assembled, when the exhaust button 3 is pressed, the screwing direction is blocked by the rotation stopping piece 32, the screwing direction is not easy to rotate, and therefore the exhaust button 3 cannot be unscrewed due to rotation, and therefore the exhaust button is not easy to unscrew.

Further, the rotation stopper 32 is located near the straight edge 143 on the side of the loosening direction and away from the straight edge 143 on the side of the loosening direction. Therefore, the rotation stopping piece 32 occupies a small space, and during assembly (especially automatic assembly of a machine), the valve rod 1 has a large probability of falling into the space outside the rotation stopping piece 32, so that the rotation stopping piece 32 is prevented from abutting against the stop table 111 on the valve rod 1, and the threaded head 12 is limited from penetrating through the exhaust button 3. Further, the rotation stopper 32 has a slope 322, and when the large diameter portion 141 falls on the rotation stopper 32, the slope 322 can guide the large diameter portion 141 to move along the slope 322, so that the large diameter portion 141 and the rotation stopper 32 do not overlap in the vertical direction.

As an example of a fixing manner of the rotation stopper 32, a positioning sleeve 33 is provided below the air release button 3, and the rotation stopper 32 is provided on an inner wall of the positioning sleeve 33.

The top surface of the exhaust key 3 is provided with a top cover 6 tab 34, and the top cover 6 tab 34 is fixedly connected with the exhaust key 3. The top cover 6 rod piece plays a role of covering the fastening nut 5, and commercial information such as a printed trademark nameplate and the like is further arranged on the label piece 34 of the top cover 6.

The outer circumference of the main cover body 2 can be provided with a decorative sleeve 9. A second sealing gasket 26 is provided inside the main lid 2, outside the inner steel sleeve 7, for sealing when connected to the rim of a cup.

In addition, the main cover body through hole 21, the exhaust key 3 through hole and the through hole on the inner steel sleeve 7 are all central holes.

The beneficial effect of this scheme is: when the fastening nut 5 is used for pressing and fastening the exhaust key 3 and the valve rod 1, the valve rod main body 11 is of a non-cylindrical structure, and the valve rod 1 cannot rotate in a central hole of the main cover body 2, so that great convenience is brought to nut screwing, and the automatic nut locking machine is particularly suitable for assembly; in addition, because the positioning sleeve 33 is arranged below the exhaust key 3, and the rotation stopping convex rib is arranged in the hole of the positioning sleeve 33, the exhaust key 3 cannot relatively rotate after being connected with the valve rod 1, and therefore when the exhaust key 3 is pressed, the exhaust key 3 can be firmly combined with the valve rod 1 and is not easy to loosen; more importantly, the end socket 13 of the valve rod 1, the valve rod main body 11 and the thread section are integrated, so that the machining precision is easy to guarantee, and the sealing effect and the pressing operation comfort degree can be guaranteed better.

EXAMPLE 3 cup

As shown in fig. 24 and 25, a cup with the cup cover of the embodiment 2.

The cup cover of the utility model can be used in cooperation with the tea-water separating cup and also can be used in cooperation with a common vacuum cup. When the air-exhausting device is used, the air-exhausting key 3 is pressed by hands to drive the valve rod 1 to move downwards, the end enclosure 13 of the valve rod 1 is separated from the sealing element 23 (a first sealing washer), and hot air in the cup can escape through the air-exhausting groove 22; after the valve rod 1 is released, the end socket 13 of the valve rod 1 returns to the original position due to the elastic force of the spring 4, and the sealing element 23 is pressed to form sealing. To the thermos cup, after the hot water cooling in the cup, easily form the negative pressure in the cup, dispose the phenomenon that general bowl cover often appears being difficult for opening, the utility model discloses can avoid the emergence of above-mentioned phenomenon, when producing the negative pressure in the cup and showing to be less than atmospheric pressure, the outer atmosphere of cup also can get into in the cup, but spring 4's elasticity will set up properly.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (17)

1. The cover body exhaust key anti-loosening structure comprises an exhaust key and a valve rod, and is characterized in that a key through hole is formed in the exhaust key, a threaded screw head is arranged at the upper end of the valve rod, a blocking platform is arranged at the lower end of the threaded screw head on the valve rod, the threaded screw head penetrates through the key through hole and extends upwards, the blocking platform abuts against the lower side of the key through hole, and at least the part extending upwards on the threaded screw head is provided with threads and is connected with the threaded screw head in a pressing mode through a fastening nut; and a rotation stopping structure is also arranged between the exhaust key and the valve rod.

2. The cover vent key release prevention structure of claim 1, wherein the key perforation is located in the center of the vent key.

3. The cover vent button release prevention structure of claim 1, wherein the diameter of the threaded head is smaller than the diameter of the valve stem, and the abutment is formed at the connection of the threaded head and the valve stem.

4. The cover vent button release prevention structure of claim 1, wherein at least a portion of the valve stem is a rotation stop stem section, the rotation stop stem section has a non-circular cross-section, the cross-section is divided into a large diameter portion and a small diameter portion, the vent button is provided with a rotation stop member corresponding to the small diameter portion, the rotation stop member limits the vent button to rotate radially around the valve stem, and the rotation stop member and the rotation stop stem section form the rotation stop structure.

5. The lid venting key anti-loosening structure according to claim 4, wherein the cross section of the rotation stopping rod section has at least one flat edge, the small diameter portion is formed at the flat edge, and the rest are large diameter portions.

6. The cover vent key release prevention structure of claim 5 wherein said detent lever section has two opposing flat sides in cross-section.

7. The lid vent key release mechanism of claim 5, wherein said detent member has a detent plane corresponding to said flat edge.

8. The lid escape button release prevention structure of claim 4, wherein the rotation stop member has a slope surface capable of guiding the large diameter portion to move along the slope surface when the large diameter portion falls onto the rotation stop member, so that the large diameter portion and the rotation stop member do not coincide in a vertical direction.

9. The structure of any one of claims 1 to 8, wherein a positioning sleeve is provided under the venting key, and the rotation stop member is provided on an inner wall of the positioning sleeve.

10. The cup cover is characterized by comprising the cover body exhaust key anti-loosening structure as claimed in any one of claims 1 to 9, and further comprising a main cover body and a spring, wherein the spring is arranged to provide upward elastic force for the valve rod, a main cover body through hole is formed in the main cover body, the valve rod penetrates through the main cover body through hole, a seal head with the diameter larger than that of the valve rod is arranged at the lower end of the valve rod, a sealing element is arranged between the seal head and the main cover body, in a normal state, under the action of the spring, the valve rod drives the seal head to press the sealing element to isolate the space above and below the main cover body, and when the exhaust key is pressed, the valve rod moves downwards to drive the seal head to leave the main cover body and communicate the space above and below the main cover body.

11. The cup cover of claim 10, wherein the spring is disposed on the valve rod, and upper and lower ends of the spring are connected to the venting button and the main cover, respectively.

12. The cup cover of claim 10, further comprising a top cover fixedly connected to the top of the main cover body or formed by extending upward around the main cover body.

13. The cup cover of claim 12, wherein the venting key is disposed within a pressing chamber that is sized to fit an outer diameter of the venting key, the pressing chamber being disposed on the top cover.

14. The cup cover of claim 13, wherein a limiting clamping table for limiting the descending of the exhaust button is arranged at the lower end of the pressing cavity.

15. The cup cover of claim 10, wherein a top cover tab is provided on a top surface of the venting key.

16. The cup cover of claim 10, wherein a decorative sleeve is provided on an outer circumferential surface of the main cover body.

17. A cup having a cap as claimed in any one of claims 10 to 16.

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