CN217659119U - Lid exhaust seal structure, bowl cover and cup - Google Patents

Abstract

The utility model discloses a lid exhaust seal structure, bowl cover and cup. The sealing device comprises a main cover body and a valve rod, wherein 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 sealing element is arranged below the main cover body through hole, a sealing head with the diameter larger than that of the valve rod is arranged at the lower end of the valve rod, a sealing surface matched with the sealing element is arranged on the sealing head, the sealing surface is tightly pressed on the sealing element in a normal state, the upper space and the lower space of the main cover body are isolated, and when the valve rod moves downwards, the sealing surface is driven to leave the sealing element to communicate the upper space and the lower space of the main cover body. The utility model also discloses a bowl cover and a cup. The technical scheme has the beneficial effects that: 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 presses the sealing rubber gasket through the elasticity of the spring to realize sealing.

Description

Lid exhaust seal structure, bowl cover and cup

Technical Field

The utility model relates to a sealed field and drinking water tea set technical field, concretely relates to lid exhaust seal 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 the 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 drinking tea, if the top cover is suddenly opened, the user presses the button in the exhaust device with hands, 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 presses the sealing rubber gasket through the elasticity 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 key and the spring shaft are easy to loosen. Because of the technical scheme that the spring shaft is directly connected with the key through the threads, the key and the spring shaft are easy to loosen due to the eccentric action of the acting point in the repeated pressing use process.

3. The assembly is complicated and time and labor consuming. Because the spring shaft (valve rod) is a cylinder, the upper part and the lower part of the spring shaft are not blocked and stopped, the assembly of a key or the installation of a nut wastes time and labor, and the tightness is difficult to control accurately.

Disclosure of Invention

For overcoming not enough among the prior art, the utility model aims to provide a lid exhaust seal structure, bowl cover and cup, it is used for solving the technical problem that valve rod and main lid are sealed effect poor, the fault rate is high.

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

the cover body exhaust sealing structure comprises a main cover body and a valve rod, wherein 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 sealing element is arranged below the main cover body through hole, an end socket with the diameter larger than that of the valve rod is arranged at the lower end of the valve rod, a sealing surface matched with the sealing element is arranged on the end socket, the sealing surface is tightly pressed on the sealing element in a normal state, the upper space and the lower space of the main cover body are isolated, and when the valve rod moves downwards, the sealing surface is driven to leave the sealing element to communicate the upper space and the lower space of the main cover body.

Optionally, the main cover perforation is located at the center of the main cover.

Optionally, the main cap perforation is matched with the valve rod in shape and size, and at least one exhaust groove is formed in the side wall of the main cap perforation.

Optionally, an accommodating cavity is formed below the main cover body, the sealing element is located in the accommodating cavity, and the lower plane of the sealing element is flush with the lower plane of the main cover body adjacent to the sealing element.

Optionally, an embedding groove is formed below the main cover body, and an embedding platform matched with the embedding groove is arranged above the sealing element.

Optionally, an inner steel sleeve is arranged below the main cover body, and the sealing element is clamped between the main cover body and the inner steel sleeve.

Optionally, the outer side of the inner steel sleeve is fixed below the main cover body through a fixing welding ring.

Optionally, a groove matched with the seal head is formed in the lower end of the sealing element, and the seal head is wholly or partially located in the groove in a normal state.

Optionally, the sealing member is a first sealing gasket.

The cup cover comprises the cover body exhaust sealing structure and further comprises an exhaust driving part, the exhaust driving part is connected with the valve rod and drives the valve rod to move along the main cover body through hole up and down.

Optionally, the exhaust driving member includes an exhaust button and a spring, the exhaust button is connected to the upper end of the valve rod, the spring is configured to provide upward elastic force to the valve rod, in a normal state, under the action of the spring, the valve rod drives the sealing surface to press against the sealing member, so as to isolate the space above and below the main cover body, and when the exhaust button is pressed, the valve rod moves downward to drive the sealing surface to leave the sealing member, so as to communicate the space above and below the main cover body.

Optionally, the spring sleeve is arranged 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, a limiting clamping table for limiting the descending of the exhaust key is arranged at the lower end of the pressing cavity.

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: 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 presses the sealing rubber gasket through the elasticity 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.

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 a cup 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; the embedding table 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 accompanying drawings are exemplary only for 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 rotation stop stem section 14. The rotation stop rod segments 14 are non-circular in cross-section and thus have 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 distance from the axis. 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 matched with the shape of the sealing element 23.

As a specific example, the end socket 13 of the valve rod 1, the valve rod body 11 and the screw head 12 are formed as a single piece, which is easy to ensure the machining precision, and therefore, the sealing effect and the pressing operation comfort can be ensured. 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.

Embodiment 2 cup cover

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 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 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 may be a first sealing washer, the sealing element 23 is connected below the main cover perforation 21, the sealing surface 131 is pressed against the sealing element 23 in a normal state to isolate the space above and below the main cover 2, and when the valve stem 1 moves downward, the sealing surface 131 is driven to leave the sealing element 23 to communicate the space above and below the main cover 2. The sealing element 23 can also be sleeved on the valve rod 1 and matched with the sealing surface 131, and moves up and down along with the valve rod 1 when in use, so as to seal the gap around the exhaust slot 22 and the main cover body through hole 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 7 is sleeved on a boss in the main cover body 2 and 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 passes 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 the centre bore department of top cap 6. 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 stop rod section 14 has at least one flat side 143, the rotation stop member 32 has a rotation stop 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 vice versa, 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 loosen.

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 are not vertically overlapped.

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 also 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 the 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 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 valve rod is particularly suitable for assembly by using an automatic nut locking machine; in addition, because the positioning sleeve 33 is arranged below the exhaust key 3, the rotation stopping convex rib is arranged in the hole of the positioning sleeve 33, and the exhaust key 3 cannot relatively rotate after being connected with the valve rod 1, 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-purifying valve is used, the air exhaust key 3 is pressed by hands to drive the valve rod 1 to move downwards, the end socket 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 exhaust 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 (18)

1. The exhaust sealing structure of the cover body comprises a main cover body and a valve rod, wherein a main cover body through hole is formed in the main cover body, and the valve rod penetrates through the main cover body through hole.

2. The cover vent seal arrangement of claim 1, wherein said main cover aperture is located in the center of the main cover.

3. The cover venting sealing structure of claim 1, wherein the main cover through hole is adapted to the shape and size of the valve stem, and at least one venting groove is formed on a sidewall of the main cover through hole.

4. The cover vent seal arrangement of claim 1 wherein said main cover has a receiving cavity below it, said seal being located in said receiving cavity, the lower plane of said seal being flush with the lower plane of its adjacent main cover.

5. The cover body exhaust sealing structure according to claim 1 or 4, wherein a caulking groove is arranged below the main cover body, and a caulking platform matched with the caulking groove is arranged above the sealing element.

6. The cover vent seal arrangement of claim 1 or 4 wherein an inner steel sleeve is provided beneath the main cover, the seal being clamped between the main cover and the inner steel sleeve.

7. The cover vent seal arrangement of claim 6, wherein the outer side of said inner steel sleeve is secured below the main cover by a retaining bead.

8. The cover body exhaust sealing structure according to claim 1, wherein the lower end of the sealing element is provided with a groove matched with the sealing head, and the sealing head is wholly or partially positioned in the groove under normal conditions.

9. A cover vent seal arrangement according to claim 1, wherein said seal is a first sealing gasket.

10. The cup cover is characterized by comprising the cover body exhaust sealing structure of any one of claims 1 to 9 and further comprising an exhaust driving part, wherein the exhaust driving part is connected with the valve rod and drives the valve rod to move up and down along the main cover body through hole.

11. The cup cover of claim 10, wherein the exhaust actuator includes an exhaust button and a spring, the exhaust button is coupled to the upper end of the valve stem, the spring is configured to provide an upward force on the valve stem, the valve stem normally drives the sealing surface against the seal under the action of the spring to isolate the space above and below the main cover, and the valve stem moves downward to drive the sealing surface away from the seal when the exhaust button is depressed to communicate the space above and below the main cover.

12. The cup cover of claim 11, 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.

13. The cup cover of claim 11, further comprising a top cover fixedly connected above the main cover body or formed by extending upward around the main cover body.

14. The cup cover of claim 13, wherein the venting key is disposed within a depression cavity sized to fit an outer diameter of the venting key, the depression cavity being disposed on the top cover.

15. The cup cover of claim 14, wherein a limiting clamping table for limiting the descending of the venting key is arranged at the lower end of the pressing cavity.

16. The cup cover of claim 11, wherein a top cover tab is provided on a top surface of the venting key.

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

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

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