Leakproof cup lid having inner-outer double-engagement structure

Abstract

A leakproof cup lid having an inner-outer double-engagement structure, comprising a lid top and a sealing flange. The sealing flange is an annular body formed by bending the edge of the lid top. The sealing flange includes an inner snap and an outer snap. The inner snap is located on an inner side and is recessed downward, while the outer snap is located on an outer side and protrudes upward. An insertion slot is formed facing downward between the inner snap and the outer snap, when the cup lid is placed on the cup body, a top end of the cup body is able to be inserted into the insertion slot, and the outer snap and the inner snap cooperate to seal and clamp an inner top wall and an outer top wall of the cup body.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application is a continuation of International Patent Application No. PCT / CN 2024 / 093682 with an international filing date of May 16, 2024, which claims priority to Chinese Patent Application No. 202311468968.2, filed on Nov. 6, 2023. The entire disclosure of the aforementioned applications is incorporated herein by reference in their entirety.TECHNICAL FIELD

[0002] This disclosure relates to the technical field of cups, and in particular, to a leakproof cup lid having an inner-outer double-engagement structure.BACKGROUND ART

[0003] The demand for takeaway beverages continues to grow with the advancement of modern society. Beverages are divided into hot beverages and cold beverages. Hot beverages generally refer to hot drinks, such as hot tea, hot coffee, hot fruit juice, hot soy milk, and the like. In contrast, cold beverages are generally drinks with ice added.

[0004] During takeaway delivery, beverages are generally filled into beverage cups and then delivered to consumers. However, during the delivery process, beverages are easily subjected to squeezing, jolting, and the like, and existing beverage cups on the market are prone to the following situations:

[0005] 1. The cup lid becomes completely detached from the cup body;

[0006] 2. Due to squeezing or insufficient sealing between the cup lid and the cup body, side leakage occurs between the cup lid and the cup body;

[0007] 3. Liquid leakage occurs at the vent hole of the cup lid.SUMMARY

[0008] In view of the shortcomings of the existing technology, the present disclosure provides a leakproof cup lid having an inner-outer double-engagement structure, which can reduce the leakage of beverages during delivery.

[0009] To achieve the above objectives, the present disclosure provides the following technical proposal: a leakproof cup lid having an inner-outer double-engagement structure, comprising a lid top and a sealing flange. The sealing flange is an annular body formed by bending an edge of the lid top. The sealing flange includes an inner snap and an outer snap. The inner snap is located on an inner side and is recessed downward. The outer snap is located on an outer side and protrudes upward. An insertion slot is formed facing downward between the inner snap and the outer snap. When the cup lid is placed on the cup body, the top of the cup body can be inserted into the insertion slot, and the outer snap and the inner snap cooperate to seal and clamp the inner and outer top walls of the cup body.

[0010] Furthermore, the sealing flange further includes a guide rim, which is an annular edge formed by bending outward from the edge of the outer snap.

[0011] Furthermore, the lid top includes a lid body and a cover plate. A center part of the lid body is recessed downward to form a temporary storage chamber. The center part of the lid body is formed with a lower vent hole that communicates with the temporary storage chamber. The cover plate is capable of opening and sealing the temporary storage chamber. The cover plate is formed with an upper vent hole, and the upper vent hole is arranged in an offset manner relative to the lower vent hole.

[0012] Furthermore, the temporary storage chamber is provided with a buffering backflow structure for buffering flow of liquid from the lower vent hole toward the upper vent hole, and for guiding the liquid back into the cup body from the lower vent hole.

[0013] Furthermore, the buffering backflow structure includes a first liquid-blocking step, which is formed by an upward protrusion from a bottom part of the temporary storage chamber on a side close to the upper vent hole.

[0014] Furthermore, a step surface of the first liquid-blocking step inclines downward from a center part toward a peripheral part.

[0015] Furthermore, the buffering backflow structure further includes a front-rear backflow blocking step, which is a strip-shaped body formed by an upward protrusion from the step surface of the first liquid-blocking step, and the front-rear backflow blocking step is located between the lower vent hole and the upper vent hole, with both ends of the front-rear backflow blocking step spaced apart from a side wall of the temporary storage chamber.

[0016] Furthermore, the buffering backflow structure further includes a left-right backflow blocking step located directly below the upper vent hole. The left-right backflow blocking step is a strip-shaped body formed by an upward protrusion from the step surface of the first liquid-blocking step. The left-right backflow blocking step is staggered with the front-rear backflow blocking step, with one end of the left-right backflow blocking step connected to the side wall of the temporary storage chamber and the other end connected to the front-rear backflow blocking step.

[0017] Furthermore, the cover plate includes an engaging tab and a movable flap hingedly connected to the engaging tab. The engaging tab is engaged with and seals the lid body, and is detachably arranged on the temporary storage chamber. The lid top is provided with a drinking hole communicating an upper side and a lower side thereof. A plug is formed on the movable flap, and the plug is capable of sealing and blocking the drinking hole.

[0018] Furthermore, an engagement groove is provided on a side of the lid body opposite to the drinking hole, and an end portion of the movable flap is engageable with the engagement groove after being flipped 180°.

[0019] The advantageous effects of the present disclosure are as follows:

[0020] The aforementioned leakproof cup lid having an inner-outer double-engagement structure includes a lid top and a sealing flange. The sealing flange is an annular body formed by bending the edge of the lid top. The sealing flange includes an inner snap and an outer snap. The inner snap is located on the inner side and is recessed, while the outer snap is located on the outer side and protrudes upward. The inner and outer snaps form an insertion slot that faces downward. When the cup lid is placed on the cup body, the top end of the cup body can be inserted into the insertion slot, and the outer and inner snaps cooperate to sealingly clamp the inner and outer top walls of the cup body. When in use, the cup lid can be simply placed on the cup body after filling the cup with beverages.

[0021] During delivery, the outer and inner snaps cooperate to sealingly clamp the inner and outer top walls of the cup body, increasing the sealing between the cup body and the outer and inner snaps and preventing beverage spillage due to jolting. In addition, the annular body formed by the outer and inner snaps bending from the edge of the lid top facilitates manufacturing and increases the strength of the overall sealing flange, allowing it to withstand a certain amount of compressive pressure, thereby preventing deformation under pressure during delivery and avoiding beverage leakage.BRIEF DESCRIPTION OF THE DRAWINGS

[0022] To more clearly illustrate the specific embodiments of the present disclosure, the accompanying drawings used in the specific embodiments will be briefly described below. In all the drawings, the elements or parts are not necessarily drawn to scale.

[0023] FIG. 1 is a schematic diagram of a leakproof cup lid having an inner-outer double-engagement structure provided in an embodiment of the present disclosure;

[0024] FIG. 2 is a sectional view of the leakproof cup lid having an inner-outer double-engagement structure as shown in FIG. 1;

[0025] FIG. 3 is a top perspective view of the lid body of the leakproof cup lid having an inner-outer double-engagement structure as shown in FIG. 1;

[0026] FIG. 4 is a bottom perspective view of the lid body of the leakproof cup lid having an inner-outer double-engagement structure as shown in FIG. 1;

[0027] FIG. 5 is a sectional view of the lid body of the leakproof cup lid having an inner-outer double-engagement structure as shown in FIG. 1;

[0028] FIG. 6 is a top perspective view of the cover plate of the leakproof cup lid having an inner-outer double-engagement structure as shown in FIG. 1;

[0029] FIG. 7 is a bottom perspective view of the cover plate of the leakproof cup lid having an inner-outer double-engagement structure as shown in FIG. 1.

[0030] Reference signs are as follows: 100 lid top; 110 lid body; 111 temporary storage chamber; 112 lower vent hole; 113 engagement groove; 120 cover plate; 121 upper vent hole; 122 engaging tab; 123 movable flap; 124 plug; 130 buffering backflow structure; 131 first liquid-blocking step; 132 front-rear backflow blocking step; 133 left-right backflow blocking step; 200 sealing flange; 210 inner snap; 220 outer snap; 230 guide rim.DETAILED DESCRIPTION OF EMBODIMENTS

[0031] The embodiments of the technical proposal of the present disclosure will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical proposal of the present disclosure and are therefore intended to limit the scope of protection of the present disclosure.

[0032] Referring to FIGS. 1 to 6, the present disclosure provides a leakproof cup lid having an inner-outer double-engagement structure, including a lid top 100 and a sealing flange 200. The sealing flange 200 is an annular body formed by bending the edge of the lid top 100. The sealing flange 200 includes an inner snap 210 and an outer snap 220. The inner snap 210 is located on the inner side and is recessed downward, while the outer snap 220 is located on the outer side and protrudes upward. An insertion slot is formed facing downward between the inner snap 210 and the outer snap 220. When the lid body 110 is placed on the cup body, the top end of the cup body can be inserted into the insertion slot, and the outer snap 220 and the inner snap 210 cooperate to sealingly clamp the inner and outer top walls of the cup body.

[0033] When in use, the cup lid is simply placed on the cup body after filling it with the beverage.

[0034] During delivery, the outer snap 220 and the inner snap 210 cooperate to sealingly clamp the inner and outer top walls of the cup body. This enhances the sealing between the cup body and the outer snap 220 and the inner snap 210, preventing the beverage from spilling due to jolting. In addition, the outer snap 220 and the inner snap 210 form an annular body by bending the edge of the lid top 100, which facilitates processing and increases the strength of the overall sealing flange 200. This allows it to withstand a certain amount of compressive pressure, thereby preventing deformation under pressure during delivery and avoiding beverage leakage.

[0035] It should be noted that, in a specific implementation, a drinking hole 114 may be formed on the cup lid, and a removable cap can be placed over the drinking hole 114. Alternatively, the cup lid may not be formed with a drinking hole 114, and the entire cup lid can be removed from the cup body directly when drinking.

[0036] In a preferred embodiment, the sealing flange 200 further includes a guide rim 230, which is an annular edge formed by bending outward from the edge of the outer snap 220. When covering the cup lid, the guide rim 230 facilitates easy positioning of the cup lid onto the cup body.

[0037] In addition, the opening of the insertion slot may be configured as an inwardly recessed structure, which can further clamp the inner and outer side walls of the cup body and enhance the sealing performance.

[0038] In this embodiment, the lid top 100 includes a lid body 110 and a cover plate 120. The center part of the lid body 110 is recessed downward to form a temporary storage chamber 111. A lower vent hole 112 communicating with the temporary storage chamber 111 is formed in the center part of the lid body 110. The cover plate 120 is capable of opening and sealing the temporary storage chamber 111. An upper vent hole 121 is formed on the cover plate 120, and the upper vent hole 121 and the lower vent hole 112 are offset relative to each other.

[0039] When delivering hot drinks, the internal hot air can enter the temporary storage chamber 111 through the lower vent hole 112, and then flow out through the upper vent hole 121 from the temporary storage chamber 111, achieving a venting effect. This prevents excessive pressure inside the cup body, which could otherwise force the beverage out.

[0040] Meanwhile, since the upper vent hole 121 is offset from the lower vent hole 112, when the cup body is subjected to shaking or compression, liquid entering the temporary storage chamber 111 through the lower vent hole 112 will be temporarily held in the temporary storage chamber 111. Part of the liquid then flows back into the cup body through the lower vent hole 112, and the remaining part flows out from the upper vent hole 121.

[0041] The misalignment of the upper vent hole 121 and the lower vent hole 112 prevents the splashing of liquid directly from the vent holes. At the same time, the temporary storage chamber 111 serves as a storage and buffering space, allowing liquid to be temporarily held and buffered. This increases the amount of splashed liquid that flows back into the cup body, thereby reducing the likelihood of leakage.

[0042] In a specific implementation, the center part of the cover plate 120 may be configured to be recessed downward, so that the recessed part can seal and be engaged with the side wall of the temporary storage chamber 111. This not only serves to seal the splashed liquid, but also increases the reliability of the connection between the cover plate 120 and the lid body 110, preventing the cover plate 120 from detaching. In addition, a plurality of interlocking protrusions and recesses may be provided in the cover plate 120 and the lid body 110. When closing the cover, the protrusions and recesses are engaged with each other to further ensure the engagement reliability of the cover plate 120.

[0043] As a further preferred embodiment, a buffering backflow structure 130 is provided in the temporary storage chamber 111 to buffer the liquid flowing from the lower vent hole 112 toward the upper vent hole 121 and to guide the liquid to flow back from the lower vent hole 112 into the cup body.

[0044] Specifically, the buffering backflow structure 130 includes a first liquid-blocking step 131, which is formed by an upward protrusion from the bottom part of the temporary storage chamber 111 on a side close to the upper vent hole 121.

[0045] When liquid enters the temporary storage chamber 111 through the lower vent hole 112, the protruded first liquid-blocking step 131 blocks the liquid as it rises, thus reducing the flow rate of the liquid and reducing the amount of liquid flowing into the temporary storage chamber 111.

[0046] As a further preferred embodiment, the step surface of the first liquid-blocking step 131 inclines downward from the center part toward the peripheral part. This downward inclination guides the backflow of liquid, thereby reducing splashing and liquid accumulation in the temporary storage chamber 111, and preventing waste of the beverage.

[0047] As a further preferred embodiment, the buffering backflow structure 130 further includes a front-rear backflow blocking step 132. The front-rear backflow blocking step 132 is a strip-shaped body formed by an upward protrusion from the step surface of the first liquid-blocking step 131. The front-rear backflow blocking step 132 is located between the lower vent hole 112 and the upper vent hole 121. Both ends of the front-rear backflow blocking step 132 are spaced apart from the side wall of the temporary storage chamber 111.

[0048] When liquid enters the temporary storage chamber 111 from the lower vent hole 112, the protruded first liquid-blocking step 131 provides a first obstruction to the liquid, while the front-rear backflow blocking step 132 provides a second obstruction, further reducing the flow rate of the liquid and reducing the amount of liquid flowing into the temporary storage chamber 111. Moreover, since both ends of the front-rear backflow blocking step 132 are spaced apart from the sidewall of the temporary storage chamber 111, the backflow of the liquid will not be hindered.

[0049] In addition, the buffering backflow structure 130 further includes a left-right backflow blocking step 133. The left-right backflow blocking step 133 is located directly below the upper vent hole 121. The left-right backflow blocking step 133 is a strip-shaped body formed by an upward protrusion from the step surface of the first liquid-blocking step 131. The left-right backflow blocking step 133 is staggered with the front-rear backflow blocking step 132. One end of the left-right backflow blocking step 133 is connected to the side wall of the temporary storage chamber 111, and the other end is connected to the front-rear backflow blocking step 132.

[0050] Similarly, the left-right backflow blocking step 133 can also provide an obstruction, further reducing the flow rate of the liquid and decreasing the amount of liquid flowing into the temporary storage chamber 111. Furthermore, since the left-right backflow blocking step 133 and the front-rear backflow blocking step 132 are staggered, they create a front- rear and left-right buffering effect on the liquid, improving the buffering performance. Likewise, the height of the left-right backflow blocking step 133 can be configured to gradually increase from the side wall of the temporary storage chamber 111 to the front-rear backflow blocking step 132, thereby guiding the backflow.

[0051] In this embodiment, the cover plate 120 includes an engaging tab 122 and a movable flap 123 hinged to the engaging tab 122. The engaging tab 122 is engaged with the lid body 110 in a sealed manner and is detachably placed on the temporary storage chamber 111. The lid top 100 is formed with a drinking hole 114 that communicates the upper side and the lower side thereof. A plug 124 is provided on the movable flap 123. The plug 124 is able to seal and block the drinking hole 114. An engagement groove 113 is provided on a side of the lid body 110 opposite to the drinking hole 114. The end portion of the movable flap 123 can be engaged in the engagement groove 113 after being flipped 180°.

[0052] When drinking, the movable flap 123 only needs to be flipped upward by 180° and the end portion thereof engaged in the engagement groove 113, so that the plug 124 is disengaged from the drinking hole 114. A straw can then be inserted into the drinking hole 114 for drinking.

[0053] With this structure, during drinking, there is no need to remove the entire cup lid, which is convenient and also prevents beverage spillage in case the cup tips over when the lid is removed. In addition, there is no need to remove the entire cover plate 120. Additionally, the hinged connection between the engaging tab 122 and the movable flap 123 reduces the rebound force of the cover plate 120 after flipping, minimizing any impact on the consumer's drinking experience.

[0054] In a specific implementation, the movable flap 123 can be configured in a Y-shape, with the two symmetrical oblique ends of the Y-shape connected to the engaging tab 122.

[0055] The plug 124 is located on the vertical stem of the Y-shape. The advantages of this structure are as follows: the distinct shape provides a guiding function, allowing consumers to easily snap it into place without precise alignment, achieving a “blind snap” effect. Furthermore, during drinking, the movable flap 123 can be flipped upward by 180°, so that the consumer can drink without touching the nose, enhancing the user experience. Moreover, the Y-shaped structure provides greater structural space for the engaging tab 122 and the temporary storage chamber 111, further improving the leakproof performance.

[0056] Furthermore, the present disclosure provides a cup, which includes a cup body and the aforementioned cup lid, the cup lid being able to cover the cup body.

[0057] When a cup with the cup lid provided by the present disclosure is employed, during delivery, the outer snap 220 and the inner snap 210 cooperate to seal and clamp the inner and outer top walls of the cup body. This not only increases the sealing between the cup body and the outer snap 220 and the inner snap 210, preventing the beverage from spilling due to jolting, but also, since the outer snap 220 and the inner snap 210 are formed into an annular shape by bending the edge of the lid top 100, the strength of the entire sealing flange 200 can be improved while facilitating processing. This allows it to withstand a certain amount of compressive pressure, thereby preventing deformation under pressure during delivery and avoiding beverage leakage.

[0058] The upper vent hole 121 is offset from the lower vent hole 112, such that when the cup body is subjected to shaking and compression, the liquid entering the temporary storage chamber 111 from the lower vent hole 112 is temporarily stored in the temporary storage chamber 111. Part of the liquid flows back into the cup body from the lower vent hole 112, and the remaining liquid flows out from the upper vent hole 121.

[0059] The misalignment of the upper vent hole 121 and the lower vent hole 112 prevents the splashing of liquid directly from the vent holes. At the same time, the temporary storage chamber 111 serves as a storage and buffering space, allowing liquid to be temporarily held and buffered. This increases the amount of splashed liquid that flows back into the cup body, thereby reducing the likelihood of leakage.

[0060] The buffering backflow structure 130 is configured to buffer the liquid flowing from the lower vent hole 112 toward the upper vent hole 121 and guide the liquid to flow back through the lower vent hole 112 into the cup body, thereby reducing the amount of liquid flowing into the temporary storage chamber 111.

[0061] The cover plate 120 includes a engaging tab 122 and a movable flap 123 hinged to the engaging tab 122. With this structure, there is no need to remove the entire cup lid, which is convenient and also prevents beverage spillage in case the cup tips over when the lid is removed. In addition, there is no need to remove the entire cover plate 120. Additionally, the hinged connection between the engaging tab 122 and the movable flap 123 reduces the rebound force of the cover plate 120 after flipping, minimizing any impact on the consumer's drinking experience.

[0062] The above embodiments are only used to illustrate the technical proposals of the present disclosure, and are not intended to limit it. Although the present disclosure has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical proposals described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical proposals to deviate from the scope of the technical proposals of the embodiments of the present disclosure, and they should all be covered within the scope of the claims and specification of the present disclosure.

Claims

1. A leakproof cup lid having an inner-outer double-engagement structure, comprising a lid top and a sealing flange, the sealing flange being an annular body formed by bending an edge of the lid top, wherein the sealing flange includes an inner snap and an outer snap, the inner snap is located on an inner side and recessed downward, the outer snap is located on an outer side and protrudes upward, an insertion slot is formed facing downward between the inner snap and the outer snap, when the cup lid is placed on the cup body, a top end of the cup body is able to be inserted into the insertion slot, and the outer snap and the inner snap cooperate to seal and clamp an inner top wall and an outer top wall of the cup body;wherein the lid top includes a lid body and a cover plate, a center part of the lid body is recessed to form a temporary storage chamber, a lower vent hole communicating with the temporary storage chamber is formed in the center part of the lid body, the cover plate is capable of opening and sealing the temporary storage chamber, an upper vent hole is formed on the cover plate, and the upper vent hole and the lower vent hole are offset from each other, a buffering backflow structure is provided in the temporary storage chamber for buffering flow of liquid from the lower vent hole toward the upper vent hole and guiding the liquid back into the cup body through the lower vent hole, the buffering backflow structure includes a first liquid-blocking step, which is formed by an upward protrusion from a bottom part of the temporary storage chamber on a side close to the upper vent hole, a step surface of the first liquid-blocking step inclines downward from the center part toward a peripheral part.

2. The leakproof cup lid having an inner-outer double-engagement structure according to claim 1, wherein the sealing flange further includes a guide rim, the guide rim is an annular edge formed by bending outward from an edge of the outer snap.

3. The leakproof cup lid having an inner-outer double-engagement structure according to claim 1, wherein the buffering backflow structure further includes a front-rear backflow blocking step, the front-rear backflow blocking step is a strip-shaped body formed by an upward protrusion from the step surface of the first liquid-blocking step, and the front-rear backflow blocking step is located between the lower vent hole and the upper vent hole, with both ends of the front-rear backflow blocking step spaced apart from a side wall of the temporary storage chamber.

4. The leakproof cup lid having an inner-outer double-engagement structure according to claim 3, wherein the buffering backflow structure further includes a left-right backflow blocking step located directly below the upper vent hole, the left-right backflow blocking step is a strip-shaped body formed by an upward protrusion from the step surface of the first liquid-blocking step, the left-right backflow blocking step is staggered with the front-rear backflow blocking step, and one end of the left-right backflow blocking step is connected to the side wall of the temporary storage chamber, and the other end thereof is connected to the front-rear backflow blocking step.

5. The leakproof cup lid having an inner-outer double-engagement structure according to claim 1, wherein the lid top includes an engaging tab and a movable flap hingedly connected to the engaging tab, the engaging tab is engaged with the lid body in a sealed manner and is detachably placed on the temporary storage chamber, the lid top is formed with a drinking hole that communicates an upper side and a lower side thereof, and the movable flap is provided with a plug that is able to seal and block the drinking hole.

6. The leakproof cup lid having an inner-outer double-engagement structure according to claim 5, wherein an engagement groove is provided on a side of the lid body opposite to the drinking hole, and an end portion of the movable flap is engageable in the engagement groove after being flipped 180°.

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