Gas outlet part and gas outlet mechanism of lighter

Abstract

The utility model discloses an air outlet part and an air outlet mechanism of a lighter, wherein the air outlet part of the lighter comprises an air valve, wherein the air valve comprises a lower section, a middle section and an upper section which are connected in sequence, wherein the lower section of the air valve is provided with a first through hole, wherein the middle section of the air valve is provided with a second through hole, a drainage groove and at least two auxiliary air holes, wherein the air inlet end of the auxiliary air hole is connected with the second through hole, and the air outlet end of the auxiliary air hole is connected with the groove bottom of the drainage groove, and wherein the upper section of the air valve comprises a polygonal prism, wherein a third through hole is provided on the polygonal prism, and the first through hole, the second through hole and the third through hole are connected in sequence and constitute a main air hole; wherein the utility model has the advantage of being helpful in improving the ignition rate.

Description

Technical Field

[0001] The utility model belongs to the technical field of lighters, in particular to an air outlet part and an air outlet mechanism of a lighter. Background Art

[0002] The gas outlet mechanism of a lighter generally includes accessories such as an air mixing tube, a gas outlet part, an insulation cup, and a conductive structure. The tail of the gas outlet part is plugged into the air mixing tube, and the head of the gas outlet part extends into the insulation cup. The gas in the gas storage box assembly is mixed with air through the air mixing tube, and the mixed gas is sprayed into the insulation cup through the gas outlet part. When the conductive structure is energized, sparks are emitted into the insulation cup, igniting the mixed gas in the insulation cup to form a flame.

[0003] The applicant has previously provided a lighter air outlet structure, with patent application number CN2024209435385, comprising an insulating cup and an air outlet portion, wherein the bottom of the insulating cup is provided with a mounting hole, the air outlet portion is penetrated by the mounting hole, a main air hole and at least one secondary air hole are provided on the air outlet portion, one end of the secondary air hole is connected to the main air hole, and at least one laterally extending drainage groove is provided on the side of the air outlet portion, the drainage groove is located in the insulating cup, and the other end of the secondary air hole is connected to the bottom of the drainage groove.

[0004] During the actual testing process, the applicant found that although the setting of the drainage groove helps to improve the uniformity of the distribution of the combustion-supporting mixed gas, the flow direction of the combustion-supporting mixed gas flowing into the insulation cup is not effectively controlled, and the problem of low ignition rate still exists. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide an air outlet part and an air outlet mechanism of a lighter, which are helpful to improve the ignition rate.

[0006] The technical solution adopted by the utility model to solve the above technical problems is: an air outlet part of a lighter, including a valve, the valve including a lower section, a middle section and an upper section connected in sequence, the lower section of the valve is provided with a first through hole, the middle section of the valve is provided with a second through hole, a drainage groove and at least two auxiliary air holes, the air inlet end of the auxiliary air hole is connected to the second through hole, the air outlet end of the auxiliary air hole is connected to the bottom of the drainage groove, the upper section of the valve includes a polygonal prism, the polygonal prism is provided with a third through hole, the first through hole, the second through hole and the third through hole are connected in sequence to form a main air hole.

[0007] Preferably, the polygonal prism has a plurality of side edges and a plurality of side surfaces, and the air outlet ends of the secondary air holes are all located below the side edges, or are all located below the side surfaces.

[0008] Preferably, the polygonal prism is a regular m-gonal prism, m is an even number greater than or equal to 4, and n secondary air holes are provided, n is an even number less than or equal to m, and the n secondary air holes are evenly spaced along the circumferential direction.

[0009] Preferably, the polygonal prism is a regular p-sided prism, p is an odd number greater than or equal to 3, and there are p secondary air holes, which are evenly spaced along the circumferential direction.

[0010] Preferably, the polygonal prism is a quadrangular prism, the bottom surface of the quadrangular prism is a rectangle or a rhombus, and two secondary air holes are provided; when the bottom surface of the quadrangular prism is a rectangle, the quadrangular prism has two first side surfaces and two second side surfaces, and the area of ​​the first side surface is greater than the area of ​​the second side surface, the two secondary air holes correspond one-to-one to the two second side surfaces, and the air outlet ends of the secondary air holes are located below the corresponding second side surfaces; when the bottom surface of the quadrangular prism is a rhombus, the rhombus has two first angles and two second angles, and the first angle is greater than the second angle, the two secondary air holes correspond one-to-one to the two second angles, and the air outlet ends of the secondary air holes are located below the corresponding second angles.

[0011] Preferably, the polygonal prism is a hexagonal prism having four third sides and two fourth sides, the two fourth sides are parallel, and two secondary air holes are provided; when the area of ​​the third side is larger than the fourth side, the two secondary air holes correspond to the two fourth sides one by one, and the air outlet ends of the secondary air holes are located below the corresponding fourth sides; when the area of ​​the third side is smaller than the fourth side, the axes of the two secondary air holes are parallel to the fourth side.

[0012] Preferably, the polygonal prism is an octagonal prism having four fifth sides and four sixth sides that are alternately distributed, and the area of ​​the fifth side is greater than the area of ​​the sixth side, and two or four secondary air holes are provided, and the air outlet end of the secondary air hole is located below the sixth side; when the secondary air holes are provided with two, the axes of the two secondary air holes are located on the same straight line; when the secondary air holes are provided with four, the four secondary air holes correspond one-to-one to the four sixth sides.

[0013] And an air outlet mechanism, comprising an insulating cup, the bottom of which is provided with a mounting hole, and also comprising the above-mentioned air outlet portion, the lower section of the valve is provided with the mounting hole, the middle section and the upper section of the valve are both located in the insulating cup, and a plurality of diversion channels are formed between the polygonal prism and the inner wall of the insulating cup.

[0014] Preferably, the inner wall of the insulation cup is provided with a first inner ring, a second inner ring, and a third inner ring which are distributed sequentially from bottom to top, the inner diameters of the first inner ring, the second inner ring, and the third inner ring increase sequentially, the lower section of the valve is fixedly provided with a positioning ring located inside the first inner ring, the positioning ring abuts against the inner bottom surface of the insulation cup, an air storage chamber is formed between the second inner ring and the valve, and the drainage groove is communicated with the air storage chamber.

[0015] Preferably, the height of the lower end face of the polygonal prism is lower than the height of the upper end face of the second inner ring.

[0016] Compared with the prior art, the advantages of the utility model are:

[0017] 1. By setting the upper part of the valve into a polygonal prism, the polygonal prism can cooperate with the heat-insulating cup to form a plurality of diversion channels. The combustion-supporting mixed gas flowing out of the secondary air hole first enters the drainage groove to make the combustion-supporting mixed gas evenly distributed, and then flows upward into the diversion channel. The diversion channel can change the flow direction of the combustion-supporting mixed gas, so that the combustion-supporting mixed gas flows upward and is finally sprayed into the combustion chamber. The combustion-supporting mixed gas of this part will be evenly and orderly distributed around the main air hole, which is convenient for ignition and helps to improve the ignition rate;

[0018] 2. By adjusting the shape of the polygonal prism, the combustion-supporting mixed gas can be reasonably distributed to control the amount of the combustion-supporting mixed gas flowing into each branch channel, thereby improving the uniformity of the distribution of the combustion-supporting mixed gas, which helps to further improve the ignition rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the gas outlet portion of the lighter in the utility model;

[0020] Figure 2 It is a schematic cross-sectional structure diagram of the gas outlet portion of the lighter in the utility model;

[0021] Figure 3 It is a side structural diagram of the gas outlet portion of the lighter in the utility model;

[0022] Figure 4 The cross-sectional structure of the upper section of the valve in the utility model is shown in FIG. Figure 1 ;

[0023] Figure 5 The cross-sectional structure of the upper section of the valve in the utility model is shown in FIG. Figure 2 ;

[0024] Figure 6 The cross-sectional structure of the upper section of the valve in the utility model is shown in FIG. Figure 3 ;

[0025] Figure 7 The cross-sectional structure of the upper section of the valve in the utility model is shown in FIG. Figure 4 ;

[0026] Figure 8 The cross-sectional structure of the upper section of the valve in the utility model is shown in FIG. Figure 5 ;

[0027] Fig. 9 The cross-sectional structure of the upper section of the valve in the utility model is shown in FIG. Figure 6 ;

[0028] Fig.10 The cross-sectional structure of the upper section of the valve in the utility model is shown in FIG. Figure 7 ;

[0029] Fig.11 The cross-sectional structure of the upper section of the valve in the utility model is shown in FIG. Figure 8 ;

[0030] Fig.12 The cross-sectional structure of the upper section of the valve in the utility model is shown in FIG. Figure 9 ;

[0031] Fig.13 The cross-sectional structure of the upper section of the valve in the utility model is shown in FIG. Figure 10 ;

[0032] Fig.14 The cross-sectional structure of the upper section of the valve in the utility model is shown in FIG. Figure 10 one;

[0033] Fig.15 The cross-sectional structure of the upper section of the valve in the utility model is shown in FIG. Figure 10 two;

[0034] Fig.16 It is a cross-sectional structural diagram of the gas outlet structure in the utility model;

[0035] Fig.17 It is a schematic diagram of the cross-sectional structure of the heat-insulating cup in the utility model.

[0036] In the figure: 1, valve; 11, lower section; 111, first through hole; 112, positioning ring; 12, middle section; 121, second through hole; 122, drainage groove; 123, auxiliary air hole; 13, upper section; 131, polygonal prism; 131a, side edge; 131b, side surface; 131c, first side surface; 131d, second side surface; 131e, first angle; 131f, second angle; 131g, third side surface; 131h the fourth side; 131i, the fifth side; 131j, the sixth side; 132, the third through hole; 14, the main air hole; 2, the insulation cup; 21, the mounting hole; 22, the first inner ring; 23, the second inner ring; 24, the third inner ring; 3, the air mixing tube; 31, the air inlet; 32, the boost cavity; 33, the boost plate; 34, the sealing ring; 35, the filter; 36, the rubber tail cap; 4, the iron cup; 5, the air storage chamber. DETAILED DESCRIPTION

[0037] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0038] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0039] Embodiment 1: Figures 1 to 3 As shown, a gas outlet of a lighter includes a valve 1, the valve 1 includes a lower section 11, a middle section 12 and an upper section 13 connected in sequence, the lower section 11 of the valve 1 is provided with a first through hole 111, the middle section 12 of the valve 1 is provided with a second through hole 121, a drainage groove 122 and at least two secondary air holes 123, the air inlet end of the secondary air hole 123 is connected to the second through hole 121, the air outlet end of the secondary air hole 123 is connected to the bottom of the drainage groove 122, the upper section 13 of the valve 1 includes a polygonal prism 131, the polygonal prism 131 is provided with a third through hole 132, the first through hole 111, the second through hole 121 and the third through hole 132 are connected in sequence to form a main air hole 14. Among them, the air flows into the heat-insulating cup 2 (see FIG. 2 ) from the main air hole 14. Fig.16 ) is ignited to form a central main flame, and the mixed gas flowing into the insulating cup 2 from the auxiliary air hole 123 is ignited to form a combustion-supporting flame; the main air hole 14 is a variable diameter hole, the first through hole 111 and the second through hole 121 are large holes, and the third through hole 132 is a small hole.

[0040] In this embodiment, the polygonal prism 131 has a plurality of side edges 131 a and a plurality of side surfaces 131 b , and the gas outlet ends of the secondary air holes 123 are all located below the side edges 131 a or below the side surfaces 131 b .

[0041] In this embodiment, the drainage groove 122 is an annular groove extending in the transverse direction, and all the auxiliary air holes 123 are distributed in the circumferential direction. The provision of multiple auxiliary air holes 123 helps to improve the uniformity of the distribution of the combustion-supporting mixed gas. Preferably, all the auxiliary air holes 123 are distributed at equal intervals in the circumferential direction.

[0042] In this embodiment, the polygonal prism 131 and the valve 1 are integrally formed, which helps to simplify the processing technology, reduce production costs and improve production efficiency.

[0043] Embodiment 2: Figures 4 to 7 As shown, the rest of the parts are the same as those in the first embodiment, except that the polygonal prism 131 is a regular m-gonal prism, m is an even number greater than or equal to 4, and n secondary air holes 123 are provided, n is an even number less than or equal to m, and the n secondary air holes 123 are evenly spaced along the circumferential direction.

[0044] When m is 4, n is 2 (see Figure 4 ) or 4 (see Figure 5 ).

[0045] When m is 6, n is 2 (see Figure 6 ) or 6 (see Figure 7 ).

[0046] When m is 8, n is 2, 4 or 8.

[0047] Embodiment 3: Figure 8 and Fig. 9 As shown, the rest of the parts are the same as those in the first embodiment, except that the polygonal prism 131 is a regular p-sided prism, p is an odd number greater than or equal to 3, and there are p auxiliary air holes 123, which are evenly spaced along the circumferential direction. Preferably, p is 3, 5 or 7, and the auxiliary air holes are located below the side edges 131a.

[0048] Embodiment 4: The rest of the embodiment is the same as that of embodiment 1, except that the polygonal prism 131 is a quadrangular prism, the bottom surface of the quadrangular prism is a rectangle or a rhombus, and two auxiliary air holes 123 are provided.

[0049] like Fig.10As shown, when the bottom surface of the quadrangular prism is a rectangle, the quadrangular prism has two first side surfaces 131c and two second side surfaces 131d, and the area of ​​the first side surface 131c is greater than the area of ​​the second side surface 131d, the two secondary air holes 123 correspond one to one with the two second side surfaces 131d, and the air outlet end of the secondary air hole 123 is located below the corresponding second side surface 131d.

[0050] like Fig.11 As shown, when the bottom surface of the quadrangular prism is a rhombus, the rhombus has two first angles 131e and two second angles 131f, and the first angle 131e is greater than the second angle 131f, the two secondary air holes 123 correspond one to one with the two second angles 131f, and the air outlet end of the secondary air hole 123 is located below the corresponding second angle 131f.

[0051] In the above scheme, the polygonal prism 131 is in the shape of an elongated strip, and part of the combustion-supporting mixed gas flowing out from the secondary air hole 123 directly flows upward and hits the lower end surface of the polygonal prism 131, causing this part of the combustion-supporting mixed gas to diffuse laterally and then flow upward, so as to reduce the amount of gas flowing upward and the gas flow rate at this point, and increase the amount of gas of the combustion-supporting mixed gas that flows out from the secondary air hole 123, diffuses laterally and then flows upward, which helps to improve the uniformity of the distribution of the combustion-supporting mixed gas.

[0052] Embodiment 5: The rest of the parts are the same as those of Embodiment 1, except that the polygonal prism 131 is a hexagonal prism having four third side surfaces 131g and two fourth side surfaces 131h, the two fourth side surfaces 131h are parallel, and two auxiliary air holes 123 are provided.

[0053] like Fig.12 As shown, when the area of ​​the third side surface 131g is larger than that of the fourth side surface 131h, the two secondary air holes 123 correspond to the two fourth side surfaces 131h one by one, and the air outlet ends of the secondary air holes 123 are located below the corresponding fourth side surfaces 131h.

[0054] like Fig.13 As shown, when the area of ​​the third side surface 131g is smaller than that of the fourth side surface 131h, the axes of the two secondary air holes 123 are parallel to the fourth side surface 131h.

[0055] In the above scheme, the polygonal prism 131 is in the shape of an elongated strip, and part of the combustion-supporting mixed gas flowing out from the secondary air hole 123 directly flows upward and hits the lower end surface of the polygonal prism 131, causing this part of the combustion-supporting mixed gas to diffuse laterally and then flow upward, so as to reduce the amount of gas flowing upward and the gas flow rate at this point, and increase the amount of gas of the combustion-supporting mixed gas that flows out from the secondary air hole 123, diffuses laterally and then flows upward, which helps to improve the uniformity of the distribution of the combustion-supporting mixed gas.

[0056] Embodiment 6: The rest of the parts are the same as those of Embodiment 1, except that the polygonal prism 131 is an octagonal prism having four fifth sides 131i and four sixth sides 131j that are alternately distributed, and the area of ​​the fifth side 131i is larger than the area of ​​the sixth side 131j, and two or four secondary air holes 123 are provided, and the air outlet end of the secondary air hole 123 is located below the sixth side 131j.

[0057] like Fig.14 As shown, when two auxiliary air holes 123 are provided, the axes of the two auxiliary air holes 123 are located on the same straight line.

[0058] like Fig.15 As shown, when the number of the auxiliary air holes 123 is four, the four auxiliary air holes 123 correspond to the four sixth side surfaces 131j one by one.

[0059] Embodiment 7: Figure 16 to Figure 17 As shown, an air outlet mechanism includes an insulation cup 2, an air mixing tube 3, an iron cup 4 and any one of the air outlet parts of the first to sixth embodiments, the bottom of the insulation cup 2 is provided with a mounting hole 21, the lower section 11 of the valve 1 is provided with the mounting hole 21 and is connected to the upper part of the air mixing tube 3, the middle section 12 and the upper section 13 of the valve 1 are both located in the insulation cup 2, a plurality of flow diversion channels are formed between the polygonal prism 131 and the inner wall of the insulation cup 2, an air inlet hole 31 is provided in the middle of the air mixing tube 3, a boosting cavity 32 is provided in the lower part of the air mixing tube 3, a boosting sheet 33, a sealing ring 34, a filter 35 and a rubber tail cap 36 are sequentially provided in the boosting cavity 32 from top to bottom, and the iron cup 4 is sleeved on the insulation cup 2. Among them, the insulation cup 2 is a ceramic cup, and the area above the valve 1 in the insulation cup 2 is a combustion chamber, and after the mixed gas is ignited, a flame will be formed in the combustion chamber and the area above the insulation cup 2.

[0060] In this embodiment, the inner wall of the heat-insulating cup 2 is provided with a first inner ring 22, a second inner ring 23, and a third inner ring 24, which are distributed from bottom to top. The inner diameters of the first inner ring 22, the second inner ring 23, and the third inner ring 24 increase in sequence. The lower section 11 of the valve 1 is fixedly provided with a positioning ring 112 located inside the first inner ring 22. The positioning ring 112 abuts against the inner bottom surface of the heat-insulating cup 2. An air storage chamber 5 is formed between the second inner ring 23 and the valve 1. The drainage groove 122 is connected to the air storage chamber 5. The air storage chamber 5 helps to distribute the combustion-supporting mixed gas more evenly. Preferably, the positioning ring 112 is integrally formed with the lower section 11 of the valve 1.

[0061] Embodiment 8: Fig.16 As shown, the rest of the parts are the same as those of the seventh embodiment, the difference being that the height of the lower end surface of the polygonal prism 131 is lower than the height of the upper end surface of the second inner ring 23, so that the combustion-supporting mixed gas in the gas storage chamber 5 can enter the combustion chamber through the diversion channel.

[0062] It should be noted that the insulation cup 2 is generally a ceramic cup, which may break if it comes into contact with the polygonal prism 131. In this solution, a small distance needs to be maintained between the polygonal prism 131 and the second inner ring 23 to avoid the insulation cup 2 from breaking, while ensuring that most of the combustion-supporting mixed gas flows into the diversion channel.

[0063] The above is an exemplary description of the utility model in conjunction with the accompanying drawings. It is obvious that the implementation of the utility model is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the utility model, or the concept and technical solution of the utility model are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. An air outlet portion of a lighter, comprising an air valve (1), wherein the air valve (1) comprises a lower section (11), a middle section (12) and an upper section (13) connected in sequence, wherein the lower section (11) of the air valve (1) is provided with a first through hole (111), and the middle section (12) of the air valve (1) is provided with a second through hole (121), a drainage groove (122) and at least two auxiliary air holes (123), wherein an air inlet end of the auxiliary air hole (123) is connected to the second through hole (121), and an air outlet end of the auxiliary air hole (123) is connected to the bottom of the drainage groove (122), characterized in that The upper section (13) of the valve (1) comprises a polygonal prism (131), a third through hole (132) is provided on the polygonal prism (131), and the first through hole (111), the second through hole (121) and the third through hole (132) are connected in sequence to form a main air hole (14).

2. The gas outlet of a lighter according to claim 1, characterized in that The polygonal prism (131) has a plurality of side edges (131a) and a plurality of side surfaces (131b), and the gas outlet ends of the secondary air holes (123) are all located below the side edges (131a) or below the side surfaces (131b).

3. The gas outlet of a lighter according to claim 2, characterized in that The polygonal prism (131) is a regular m-gonal prism, where m is an even number greater than or equal to 4, and n secondary air holes (123) are provided, where n is an even number less than or equal to m, and the n secondary air holes (123) are distributed at equal intervals along the circumferential direction.

4. The gas outlet of a lighter according to claim 2, characterized in that The polygonal prism (131) is a regular p-sided prism, where p is an odd number greater than or equal to 3, and p secondary air holes (123) are provided, and the p secondary air holes (123) are distributed at equal intervals along the circumferential direction.

5. The gas outlet of a lighter according to claim 2, characterized in that The polygonal prism (131) is a quadrangular prism, the bottom surface of the quadrangular prism is a rectangle or a rhombus, and two secondary air holes (123) are provided; When the bottom surface of the quadrangular prism is a rectangle, the quadrangular prism has two first side surfaces (131c) and two second side surfaces (131d), and the area of ​​the first side surface (131c) is greater than the area of ​​the second side surface (131d), the two secondary air holes (123) correspond to the two second side surfaces (131d) one by one, and the air outlet end of the secondary air hole (123) is located below the corresponding second side surface (131d); When the bottom surface of the quadrangular prism is a rhombus, the rhombus has two first angles (131e) and two second angles (131f), and the first angle (131e) is greater than the second angle (131f), the two secondary air holes (123) correspond to the two second angles (131f) one by one, and the air outlet ends of the secondary air holes (123) are located below the corresponding second angles (131f).

6. The gas outlet of a lighter according to claim 2, characterized in that The polygonal prism (131) is a hexagonal prism, the hexagonal prism has four third side surfaces (131g) and two fourth side surfaces (131h), the two fourth side surfaces (131h) are parallel to each other, and two secondary air holes (123) are provided; When the area of ​​the third side surface (131g) is larger than that of the fourth side surface (131h), the two auxiliary air holes (123) correspond to the two fourth side surfaces (131h) one by one, and the air outlet ends of the auxiliary air holes (123) are located below the corresponding fourth side surfaces (131h); When the area of ​​the third side surface (131g) is smaller than that of the fourth side surface (131h), the axes of the two secondary air holes (123) are parallel to the fourth side surface (131h).

7. The gas outlet of a lighter according to claim 2, characterized in that The polygonal prism (131) is an octagonal prism, the octagonal prism has four fifth side surfaces (131i) and four sixth side surfaces (131j) that are alternately distributed, and the area of ​​the fifth side surface (131i) is greater than the area of ​​the sixth side surface (131j), two or four secondary air holes (123) are provided, and the air outlet end of the secondary air hole (123) is located below the sixth side surface (131j); When the number of the auxiliary air holes (123) is two, the axes of the two auxiliary air holes (123) are located on the same straight line; When the number of the auxiliary air holes (123) is four, the four auxiliary air holes (123) correspond one-to-one to the four sixth side surfaces (131j).

8. An air outlet mechanism, comprising a heat-insulating cup (2), wherein the bottom of the heat-insulating cup (2) is provided with a mounting hole (21), characterized in that It also includes the air outlet portion as described in any one of claims 1 to 7, the lower section (11) of the valve (1) is provided with the mounting hole (21), the middle section (12) and the upper section (13) of the valve (1) are both located in the thermal insulation cup (2), and a plurality of diversion channels are formed between the polygonal prism (131) and the inner wall of the thermal insulation cup (2).

9. An air outlet mechanism according to claim 8, characterized in that The inner wall of the heat-insulating cup (2) is provided with a first inner ring (22), a second inner ring (23), and a third inner ring (24) which are sequentially distributed from bottom to top, and the inner diameters of the first inner ring (22), the second inner ring (23), and the third inner ring (24) are sequentially increased. The lower section (11) of the valve (1) is fixedly provided with a positioning ring (112) located inside the first inner ring (22), and the positioning ring (112) is in contact with the inner bottom surface of the heat-insulating cup (2). An air storage chamber (5) is formed between the second inner ring (23) and the valve (1), and the drainage groove (122) is connected with the air storage chamber (5).

10. An air outlet mechanism according to claim 9, characterized in that The height at which the lower end surface of the polygonal prism (131) is located is lower than the height at which the upper end surface of the second inner ring (23) is located.

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