High-toughness, breathable and easy-to-unfold composite aluminum foil box

Abstract

This invention provides a high-toughness, breathable, and easy-open composite aluminum foil box. The box includes: a box body with a first receiving space and a first opening; a lid assembly heat-sealed to the first opening, and a venting portion on the lid assembly; and a breather valve assembly located on the lid assembly near the first receiving space. The breather valve assembly allows for ventilation when the box contains hot food. This invention makes the aluminum foil box safer when containing hot food.

Description

Technical Field

[0001] This utility model relates to the field of aluminum foil box technology, and more specifically, to a high-toughness, breathable, and easy-to-open composite aluminum foil box. Background Technology

[0002] With the fast pace of life and the booming development of the food delivery industry, the demand for ready-to-eat hot food packaging is increasing. Aluminum foil, due to its excellent barrier properties (oxygen, moisture, and light barrier), high-temperature resistance, and certain formability, is widely used in food packaging such as lunch boxes and bento boxes. This type of packaging typically includes a food container and a lid that is heat-sealed over the opening of the container. However, when hot food is stored in existing heat-sealed aluminum foil containers, the water vapor released by the food easily accumulates in the sealed space, causing a sudden increase in internal pressure. This can lead to packaging bulging, deformation, or even rupture, posing a risk of leakage and burns. While opening holes in the lid for ventilation can alleviate pressure, it compromises the overall airtightness of the packaging, leading to leakage of soup during transportation and storage, and failing to prevent the intrusion of external contaminants, affecting hygiene and safety. Furthermore, the high heat-sealing strength used to ensure airtightness makes the container difficult to open (insufficient ease of opening), and ordinary aluminum foil is not tough enough under heat or stress, making it prone to breakage. Utility Model Content

[0003] Therefore, this utility model provides a high-toughness, breathable, and easy-to-open composite aluminum foil box, making the aluminum foil box safer when carrying hot food.

[0004] To address the aforementioned problems, this utility model provides a high-toughness, breathable, and easy-open composite aluminum foil box. The high-toughness, breathable, and easy-open composite aluminum foil box includes: a box body, which has a first accommodating space and a first opening; a lid assembly, which is heat-sealed at the first opening and has a venting portion; and a breathing valve assembly, which is located on the lid assembly on the side near the first accommodating space. The breathing valve assembly is used to allow ventilation when the box contains hot food.

[0005] Compared with existing technologies, the technical effects achieved by adopting this solution are as follows: By integrating a breather valve assembly on the lid, directional ventilation is automatically triggered when hot food is being served, allowing high-temperature steam to be discharged directionally from the vent, thus preventing a sudden increase in internal pressure; at the same time, the sealing is maintained when the food is not hot, preventing leakage of soup and intrusion of external contaminants; the heat-sealing connection between the box and the lid ensures basic sealing, while the composite aluminum foil material gives the whole a high degree of toughness and pressure resistance. The three work together to achieve safe pressure relief, hygienic sealing, and structural reliability of hot food packaging.

[0006] In one embodiment of this utility model, the breathing valve assembly further includes: a fixing part, which has a second receiving space and a mounting position; a rotating part, which is connected to the mounting position so that the rotating part can rotate on the mounting position; wherein the venting part, the second receiving space, the mounting position and the rotating part are connected.

[0007] Compared with existing technologies, the technical effects achieved by this solution are as follows: Through the rotatable mating structure of the fixed part and the rotating part, the rotating part is driven to move under the action of steam pressure inside the box, so that the second accommodating space and the venting part are automatically connected, realizing pressure-responsive on-demand venting; the mounting position of the fixed part provides stable support, ensuring that the rotating part resets and closes after the pressure is removed, avoiding the sealing failure caused by the traditional vent being constantly open, and significantly improving the valve's precise control capability and normal sealing reliability in hot food scenarios.

[0008] In one embodiment of this utility model, the breathing valve assembly further includes: a rotating part having a plurality of first slots; a mounting position having a plurality of second slots, and when the rotating part and the mounting position are connected, gas exchange can occur between the plurality of first slots and the plurality of second slots.

[0009] Compared with existing technologies, the technical effects achieved by this solution are as follows: By utilizing the multi-slot design on the rotating part and the mounting position, when the internal steam pressure drives the rotating part to rotate, the first slot and the second slot form an interlaced and interconnected multi-channel airflow path, which greatly improves the steam emission efficiency per unit time and quickly balances the internal and external pressure difference; at the same time, the interlaced slot structure forms a labyrinth barrier in the closed state, which effectively prevents external liquids / contaminants from seeping in through the vent, and strengthens the valve's bidirectional protection performance.

[0010] In one embodiment of this utility model, the breather valve assembly further includes: a rotating part having a mating groove; the rotating part being interference-fitted with the mounting position through the mating groove.

[0011] Compared with existing technologies, the technical advantages achieved by this solution are as follows: Through the interference fit between the rotating part and the mounting position, a continuous radial clamping force is generated even without steam pressure, eliminating the assembly gap between the rotating and fixed parts and ensuring the valve's sealing performance under normal temperature transportation or storage conditions. Furthermore, assembly is simpler.

[0012] In one embodiment of this utility model, the high-toughness, breathable, and easy-to-open composite aluminum foil box further includes: a breathable part consisting of multiple circumferentially arranged breathable holes; and a second accommodating space corresponding to the breathable holes.

[0013] Compared with existing technologies, the technical effects achieved by adopting this technical solution are as follows: the venting part is designed with multiple vent holes arranged in a circle, which, together with the cavity structure of the second accommodating space, allows steam to diffuse evenly from the breather valve to the group of vent holes, avoiding the accumulation of condensate or blockage of vent holes caused by local airflow overload.

[0014] In one embodiment of this utility model, the cover assembly is circular, and the cover assembly further includes: a plurality of first reinforcing ribs, which are arranged in a radiating manner toward the direction away from the center of the cover assembly.

[0015] Compared with existing technologies, the technical effects achieved by this technical solution are as follows: multiple first reinforcing ribs arranged radially are integrated into the circular cover assembly, which significantly improves the overall bending stiffness of the cover under heat-sealing conditions and resists the bulging deformation of the cover surface caused by hot food steam pressure; the radial layout of the reinforcing ribs optimizes stress distribution, prevents the heat-sealing layer from tearing due to local stress concentration, and maintains the flatness of the cover to ensure the stable operation of the breather valve assembly.

[0016] In one embodiment of this utility model, the cover assembly further includes a pull member, which is integrally formed with the cover assembly and extends in a direction away from the center of the cover assembly.

[0017] Compared with existing technologies, the technical effects achieved by this solution are as follows: By extending the pull member to the edge of the cover in an integrated manner, users can apply force to tear it away from the center. The leverage principle is used to significantly reduce the peel strength of the heat seal layer, making it easy to open and avoiding the breakage of the aluminum foil layer caused by violent tearing. The integrated design ensures that there are no structural weak areas between the pull member and the cover, preventing local delamination or material separation when opening.

[0018] In one embodiment of this utility model, the cover assembly further includes an extension member, which is disposed at the other end of the cover assembly corresponding to the pulling member.

[0019] Compared with existing technologies, the technical effects achieved by this solution are as follows: The extension and pull parts located on the edge of the cover are positioned to form a heat-resistant opening structure that allows for coordinated operation with both hands. Users can hold the pull and extension parts separately and apply force in opposite directions to avoid their fingers coming into contact with the hot cover surface. At the same time, the bidirectional force makes the heat-sealing layer peel off more evenly, reduces aluminum foil heat-sealing residue, and improves the cleanliness and safety of opening.

[0020] In one embodiment of this utility model, the box body further includes: a plurality of second reinforcing ribs, which are arranged on the inner wall of the box body.

[0021] Compared with existing technologies, the technical effects achieved by this technical solution are as follows: multiple second reinforcing ribs are regularly arranged on the inner wall of the box, and the three-dimensional rib structure significantly enhances the circumferential stiffness of the box side wall, resisting external compression during stacking and transportation and internal hydraulic pressure under hot food conditions; the reinforcing rib network forms an internal support frame, inhibits the creep deformation of the box, extends the reuse cycle, and improves the stacking stability of the lunch boxes.

[0022] In one embodiment of this utility model, the box body further includes a protrusion, which is disposed at the bottom of the box body away from the first opening.

[0023] Compared with existing technologies, the technical effects achieved by this solution are as follows: the bottom of the box is equipped with a raised part to form a lifting base, creating a bottom air insulation layer, which slows down the conduction rate of hot food temperature through the contact surface to the external environment and maintains the food temperature; at the same time, the raised structure disperses the stress on the bottom of the box, prevents damage caused by external hard objects, and increases the frictional resistance with the tabletop, improving the stability of the box.

[0024] By adopting the technical solution of this utility model, the following technical effects can be achieved:

[0025] (1) By integrating a breathing valve assembly on the lid assembly, directional ventilation is automatically triggered when carrying hot food, and high-temperature steam is discharged from the ventilation part in a directional manner to avoid a sudden increase in internal pressure; at the same time, the sealing is maintained when the food is not hot to prevent soup leakage and external contamination intrusion; the heat-sealing connection between the box and the lid ensures basic sealing, while the composite aluminum foil material gives the whole high toughness and pressure resistance. The three work together to achieve safe pressure relief, hygienic sealing and structural reliability of hot food packaging. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 One of the structural schematic diagrams of a high-toughness, breathable, and easy-to-open composite aluminum foil box provided in this utility model embodiment;

[0028] Figure 2 A second schematic diagram of the structure of a high-toughness, breathable, and easy-to-open composite aluminum foil box provided for an embodiment of this utility model;

[0029] Figure 3 This is a schematic diagram of the exploded structure of the breather valve assembly;

[0030] Figure 4 This is a schematic diagram of the rotating part;

[0031] Figure 5 This is a structural schematic diagram of the fixing part;

[0032] Figure 6 This is a schematic diagram of the cover assembly.

[0033] Explanation of reference numerals in the attached figures:

[0034] 100. High-toughness, breathable, easy-open composite aluminum foil box; 110. Box body; 120. Lid assembly; 121. First reinforcing rib; 122. Pulling member; 123. Extension member; 130. Breathable part; 140. Breathing valve assembly; 141. Fixing part; 142. Second receiving space; 143. Mounting position; 144. Rotating part; 145. First slot; 146. Second slot; 147. Mating groove; 150. Protrusion. Detailed Implementation

[0035] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions in the embodiments of this utility model are clearly and completely described. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0036] [First Embodiment]

[0037] See Figures 1-6 This utility model provides a high-toughness, breathable, and easy-open composite aluminum foil box 100, which includes: a box body 110, which has a first accommodating space and a first opening; a cover assembly 120, which is heat-sealed at the first opening and has a venting part 130; and a breathing valve assembly 140, which is located on the cover assembly 120 near the first accommodating space. The breathing valve assembly 140 is used to allow ventilation when the box body 110 is holding hot food.

[0038] Specifically, the breathing valve assembly 140 is attached to the cover assembly 120 by adhesive. Both the cover assembly 120 and the box 110 are integrally formed from aluminum foil and are heat-sealed using a heat-sealing process. After the first opening of the cover assembly 120 and the box 110 is attached and covered, they are heat-sealed by a heat-sealing machine.

[0039] Specifically, when hot food or soup is placed inside the box 110, the steam generated will create pressure inside the box 110. This pressure will then enter the rotating part 144 through the second receiving part and the second slot 146. Under the pressure, the rotating part 144 will rotate, thereby connecting the second receiving space 142 with the vent 130 to achieve gas transmission. This will prevent the steam from bulging inside the box.

[0040] Preferably, the breathing valve assembly 140 integrated on the lid assembly 120 automatically triggers directional ventilation when carrying hot food, directing high-temperature steam out from the ventilation part 130 to avoid a sudden increase in internal pressure; at the same time, it maintains the airtightness when not carrying hot food, preventing soup leakage and external contamination; the heat-sealing connection between the box body 110 and the lid ensures basic sealing, while the composite aluminum foil material gives the whole high toughness and pressure resistance. The three work together to achieve safe pressure relief, hygienic sealing and structural reliability of hot food packaging.

[0041] Specifically, the breathing valve assembly 140 further includes: a fixing part 141, which has a second receiving space 142 and a mounting position 143; a rotating part 144, which is connected to the mounting position 143 so that the rotating part 144 can rotate on the mounting position 143; wherein the venting part 130 is connected to the second receiving space 142, the mounting position 143 and the rotating part 144.

[0042] Preferably, through the rotatable engagement structure of the fixed part 141 and the rotating part 144, the rotating part 144 is driven to move under the action of the steam pressure inside the box, so that the second accommodating space 142 and the venting part 130 are automatically connected, realizing pressure-responsive on-demand venting; the mounting position 143 of the fixed part 141 provides stable support, ensuring that the rotating part 144 resets and closes after the pressure is removed, avoiding the sealing failure caused by the traditional vent being constantly open, and significantly improving the valve's precise control capability and normal sealing reliability in hot food scenarios.

[0043] Specifically, the breathing valve assembly 140 also includes: a rotating part 144 having a plurality of first slots 145; a mounting position 143 having a plurality of second slots 146, and when the rotating part 144 and the mounting position 143 are connected, gas exchange can occur between the plurality of first slots 145 and the plurality of second slots 146.

[0044] Preferably, by utilizing the multiple slotted designs on the rotating part 144 and the mounting position 143, when the internal steam pressure drives the rotating part 144 to rotate, the first slot 145 and the second slot 146 form an interlaced and interconnected multi-channel airflow path, which greatly improves the steam emission efficiency per unit time and quickly balances the internal and external pressure difference; at the same time, the interlaced slotted structure forms a labyrinth-like barrier in the closed state, effectively preventing external liquids / pollutants from seeping in reverse through the vent 130, and strengthening the valve's bidirectional protection performance.

[0045] Specifically, the breather valve assembly 140 also includes: a rotating part 144 having a mating groove 147; the rotating part 144 and the mounting position 143 are interference-fitted through the mating groove 147.

[0046] Preferably, the interference fit between the rotating part 144 and the mounting position 143, through the mating groove 147, generates a continuous radial clamping force when there is no steam pressure, eliminating the assembly gap between the rotating part 144 and the fixed part 141, and ensuring the valve's sealing performance under normal temperature transportation or storage conditions. This also simplifies assembly.

[0047] Specifically, the high-toughness, breathable, and easy-to-open composite aluminum foil box 100 also includes: a breathable part 130 with multiple circumferentially arranged breathable holes; and a second accommodating space 142 corresponding to the breathable holes.

[0048] Preferably, the vent 130 is designed with multiple vent holes arranged in a circle, which, together with the cavity structure of the second accommodating space 142, allows steam to diffuse evenly from the breather valve to the group of vent holes, avoiding condensation accumulation or hole blockage caused by local airflow overload.

[0049] Specifically, the cover assembly 120 is circular and also includes a plurality of first reinforcing ribs 121, which are arranged in a radiating manner away from the center of the cover assembly 120.

[0050] Preferably, multiple first reinforcing ribs 121 arranged radially are integrated into the circular cover assembly 120, which significantly improves the overall bending stiffness of the cover under heat-sealing conditions and resists the bulging deformation of the cover surface caused by hot food steam pressure. The radial layout of the reinforcing ribs optimizes stress distribution, prevents the heat-sealing layer from tearing due to local stress concentration, and maintains the flatness of the cover to ensure the stable operation of the breather valve assembly 140.

[0051] Specifically, the cover assembly 120 also includes a pull member 122, which is integrally formed with the cover assembly 120 and extends in a direction away from the center of the cover assembly 120.

[0052] Preferably, the user can apply force to tear the cover away from the center by extending the one-piece pull member 122 towards the edge of the cover. The leverage principle is used to greatly reduce the peeling strength of the heat seal layer, so as to achieve easy opening and avoid the aluminum foil layer breakage caused by violent tearing. The one-piece design ensures that there is no structural weak area between the pull member 122 and the cover, preventing local delamination or material separation when opening.

[0053] Specifically, the cover assembly 120 also includes an extension 123, which is disposed at the other end of the cover assembly 120 corresponding to the pull member 122.

[0054] Preferably, the extension 123 located on the edge of the cover corresponds to the position of the pull member 122, forming a heat-resistant opening structure for two-handed operation: the user can hold the pull member 122 and the extension member 123 respectively to apply force in opposite directions, avoiding the fingers from contacting the hot cover surface. At the same time, the bidirectional force makes the heat-sealing layer peel off more evenly, reduces the residue in the aluminum foil heat-sealing area, and improves the cleanliness and safety of opening.

[0055] Specifically, the box body 110 also includes: a plurality of second reinforcing ribs, which are arranged on the inner wall of the box body 110.

[0056] Specifically, the second reinforcing rib can be a protrusion integrally formed with the box body 110. Specifically, it can extend from the first opening near the inner wall to the bottom of the box body 110, and multiple second reinforcing ribs are arranged along the inner wall of the box body 110.

[0057] Preferably, multiple second reinforcing ribs are regularly arranged on the inner wall of the box body 110. The three-dimensional rib structure significantly enhances the circumferential stiffness of the side wall of the box body 110, resisting external compression during stacking and transportation and internal hydraulic pressure under hot food conditions. The reinforcing rib network forms an internal support frame, suppressing creep deformation of the box body 110, extending the reuse cycle, and improving the stacking stability of the lunch boxes.

[0058] Specifically, the box body 110 also includes a protrusion 150, which is located on the bottom of the box body 110 away from the first opening.

[0059] Preferably, the bottom of the box body 110 is provided with a protrusion 150 to form a lifting base, creating a bottom air insulation layer, slowing down the conduction rate of hot food temperature through the contact surface to the external environment, and maintaining the food temperature; at the same time, the protrusion structure disperses the load-bearing stress of the bottom of the box, prevents damage caused by external hard objects piercing, and increases the frictional resistance with the tabletop, improving the stability of placement.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model 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 solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A high-toughness, breathable, and easy-to-open composite aluminum foil box, characterized in that, The high-toughness, breathable, and easy-open composite aluminum foil box includes: The box body (110) is provided with a first receiving space and a first opening; A cover assembly (120) is heat-sealed at the first opening, and the cover assembly (120) is provided with a vent (130); A breathing valve assembly (140) is disposed on the cover assembly (120) on the side near the first receiving space; The breathing valve assembly (140) is used to allow air to pass through when the box (110) is holding hot food.

2. The high-toughness, breathable, and easy-open composite aluminum foil box according to claim 1, characterized in that, The breathing valve assembly (140) also includes: The fixing part (141) is provided with a second receiving space (142), and the fixing part (141) is also provided with a mounting position (143); A rotating part (144) is connected to the mounting position (143) so that the rotating part (144) can rotate on the mounting position (143); The vent (130) is connected to the second accommodating space (142), the mounting position (143), and the rotating part (144).

3. The high-toughness, breathable, and easy-open composite aluminum foil box according to claim 2, characterized in that, The breathing valve assembly (140) also includes: The rotating part (144) is provided with a plurality of first slots (145); The mounting position (143) is provided with a plurality of second slots (146), and when the rotating part (144) and the mounting position (143) are connected, gas exchange can occur between the plurality of first slots (145) and the plurality of second slots (146).

4. The high-toughness, breathable, and easy-open composite aluminum foil box according to claim 2, characterized in that, The breathing valve assembly (140) also includes: The rotating part (144) is provided with a mating groove (147); The rotating part (144) is interference-fitted with the mating groove (147) and the mounting position (143).

5. The high-toughness, breathable, and easy-to-open composite aluminum foil box according to claim 2, characterized in that, The high-toughness, breathable, and easy-to-open composite aluminum foil box also includes: The ventilated part (130) consists of a plurality of circumferentially arranged vent holes; The second accommodating space (142) is provided corresponding to the vent.

6. The high-toughness, breathable, and easy-open composite aluminum foil box according to claim 1, characterized in that, The cover assembly (120) is circular, and the cover assembly (120) further includes: A plurality of first reinforcing ribs (121) are arranged in a divergent manner toward the center of the cover assembly (120).

7. The high-toughness, breathable, and easy-open composite aluminum foil box according to claim 6, characterized in that, The cover assembly (120) also includes: A pull member (122) is integrally formed with the cover assembly (120) and extends in a direction away from the center of the cover assembly (120).

8. The high-toughness, breathable, and easy-to-open composite aluminum foil box according to claim 7, characterized in that, The cover assembly (120) also includes: An extension (123) is provided at the other end of the cover assembly (120) corresponding to the pull member (122).

9. The high-toughness, breathable, and easy-open composite aluminum foil box according to claim 1, characterized in that, The housing (110) also includes: Multiple second reinforcing ribs are arranged on the inner wall of the box body (110).

10. The high-toughness, breathable, and easy-open composite aluminum foil box according to claim 1, characterized in that, The housing (110) also includes: A protrusion (150) is provided at the bottom of the box body (110) away from the first opening.

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