TWI837896B - Double-layer microwave container - Google Patents

Abstract

The present invention is a double-layer microwave container, comprising an outer box body and an inner box body, wherein the inner box body is accommodated in the outer box body, and the top periphery of the outer box body and the top periphery of the inner box body are connected to a sealing film, so that the outer box body and the inner box body are sealed together by the sealing film, so that the food contained in the inner box body will not flow into the outer box body, let alone flow out of the outer box body.

Description

Double-layer microwave container

The present invention relates to a microwave container, and in particular to a double-layer microwave container formed by stacking an inner box body on an outer box body.

Modern people lead busy lives. The time from getting off work to going to bed is quite short. If overtime is added, rest time, especially for dual-income families, is limited. In addition to cleaning the home environment, washing before going to bed, taking care of children, washing and drying clothes, and cooking three meals a day, they also have to spend time shopping for ingredients. It often takes a lot of time from preparing ingredients to cooking a meal, which limits people's rest time. Therefore, many people choose to eat out in restaurants or snack bars.

For many food companies, the above situation actually has great business opportunities, and food companies have also developed a variety of microwave foods, such as bento, soup, stew, fried rice, fried rice or porridge, etc., and promoted them to various convenience stores and supermarkets for sale. The packaging structure of these microwave foods is mainly to put the ingredients in a heat-resistant plastic box, and then use a sealing film to seal the opening of the heat-resistant plastic box, so that the ingredients are stored in the heat-resistant plastic box, so that they can be displayed on the refrigerator and provided to consumers for selection and purchase. After consumers buy microwave foods, they directly put the heat-resistant plastic box and the ingredients it contains into the microwave oven for heating. After heating is completed, they can eat, which is quite convenient.

However, when the heat-resistant plastic box is heated in the microwave oven, the food contained in the heat-resistant plastic box will generate gas due to the heat, causing the air pressure in the heat-resistant plastic box to gradually increase. When the air pressure is greater than the adhesion of the sealing film, a gas explosion will occur, causing the food to splash everywhere in the microwave oven, making the microwave oven dirty and wasting food. In order to avoid this situation, before heating the heat-resistant plastic box, tear off part of the sealing film to expose a gap, or use a utility knife to cut a slit in the sealing film so that the gas can be discharged from the gap or slit.

For consumers or convenience store employees, the aforementioned method of tearing off the sealing film to expose a gap or using a utility knife to cut a slit in the sealing film is not convenient, so many heat-resistant plastic box manufacturers have developed various microwave containers that can avoid gas explosions during the heating process, such as: Taiwan Invention Patent No. I522288 (Invention Name: Microwave Exhaust Container), No. M616074 (New Model Name: Microwave Pressure Relief Container) or No. M626735 (New Model Name: Film-coated Food Container and Container Structure), etc. The microwave containers of these patents can generate gas pressure relief holes between the heat-resistant plastic box and the sealing film during the heating process, thereby solving the problem of possible gas explosions in microwave containers.

Furthermore, another double-layer microwave container is usually an inner box stacked in an outer box, and the top edge of the outer box is sealed together with a sealing film, wherein the outer box contains staple food ingredients such as rice and noodles, and the inner box contains liquid sauces (for example, curry sauce or casserole sauce, etc.) and ingredients (for example, potatoes and meat), thereby forming a microwave food lunch box. When the microwave food lunch box is in the heating process, as mentioned above, a gas pressure relief vent can be generated between the outer box and the sealing film to avoid gas explosion. After taking the microwave food lunch box out of the microwave oven, just pour the liquid sauce in the inner box into the outer box and it can be eaten. This structural design is to prevent the liquid sauce from being completely absorbed by the staple food ingredients when the liquid sauce is mixed with the staple food ingredients.

However, before heating, only the outer box of the microwave food lunch box is sealed with the sealing film, and the inner box is not sealed with the sealing film. Therefore, the liquid sauce in the inner box can easily flow into the outer box, leaving only the ingredients in the inner box. This makes it impossible to present the appearance of liquid sauce poured on the staple food ingredients. Furthermore, the gas pressure relief vents generated by microwave food containers after heating are a very troublesome problem for consumers. The problem is that when consumers buy microwave food containers and use the microwave oven of a convenience store to heat them, and after heating, ask the store clerk to pack the microwave food containers in a bag to take to other places for consumption, when consumers open the bag, they often see that the microwave food containers are tilted inside the bag. At this time, all or a large part of the liquid sauce in the inner box may have flowed out of the outer box from the gas pressure relief vents. In this way, users will not be able to consume the delicious food mixed with the staple food ingredients, liquid sauce and side dishes. Therefore, it is necessary to improve this problem.

In view of the problems of the prior art, one purpose of the present invention is to seal the outer box and the inner box together with a sealing film to prevent the liquid sauce in the inner box from flowing into the outer box, or even to prevent the liquid sauce in the inner box from flowing out of the outer box. Another purpose of the present invention is to generate a gas pressure relief port during the heating process, and the liquid sauce in the inner box will not flow out of the outer box from the gas pressure relief port, so as to solve the problem that the liquid food contained in the inner box of the double-layer microwave container may overflow from the explosion-proof exhaust port formed between the microwave container and the sealing film.

According to the purpose of the present invention, a double-layer microwave container is provided, comprising an outer box body, an inner box body and a sealing film, wherein the inner box body is accommodated in the outer box body, and the sealing film simultaneously connects the top periphery of the outer box body and the top periphery of the inner box body.

According to the purpose of the present invention, a double-layer microwave container is provided, comprising an outer box body and an inner box body, wherein the outer box body comprises a first opening portion and is provided with a first accommodating portion, one end of the outer box body is provided with the first opening portion, the first opening portion is communicated with the first accommodating portion, the outer box body is provided with a first connecting portion protruding outward along the edge of the first opening portion, the outer box body is provided with a first protruding portion along the edge of the first connecting portion, and the horizontal height of the top surface of the first protruding portion is higher than the horizontal height of the first connecting portion, and the inner box body is overlapped on the outer box body The inner box body is provided with a second accommodating portion within the first accommodating portion, and a second opening portion is provided at one end of the inner box body, the second opening portion is communicated with the second accommodating portion, and the inner box body is provided with a second connecting portion extending along the edge of the second opening portion toward the first connecting portion, and a side of the second connecting portion opposite to the first connecting portion abuts against the first connecting portion, and the inner box body extends along the edge of the second connecting portion toward the first connecting portion to form a second protrusion, and the horizontal height of the top surface of the second protrusion is higher than the horizontal height of the second connecting portion.

The height difference between the first protrusion and the second protrusion is between 0.05 and 2.0 mm.

The top surface of the first protrusion and the top surface of the second protrusion are connected to the same sealing film, so that the sealing film seals the second opening.

The outer box body is provided with a first gas discharge unit on the first protrusion, and the second gas discharge unit is provided on the second protrusion. During the heating process of the double-layer microwave container, the gas generated by the outer box body can be discharged from the position of the first gas discharge unit, and the gas in the inner box body can be discharged from the position of the second gas discharge unit to the outer box body, and then further discharged from the position of the first gas discharge unit.

The position where the first protrusion is provided with the first gas discharge unit and the position where the second protrusion is provided with the second gas discharge unit are staggered with each other.

Among them, the first gas discharge unit is a notch set on the first protrusion, the second gas discharge unit can be a part of the top surface of the second protrusion as a weak sealing area, and the other part of the second protrusion is a non-weak sealing area. The adhesion between the weak sealing area and the sealing film is less than the adhesion between the non-weak sealing area and the sealing film.

There is a height difference between the weak sealing area and the non-weak sealing area, and further, the height of the weak sealing area is lower than the height of the non-weak sealing area.

There is a gap between the first protrusion and the second protrusion to form an exhaust groove. When the first gas discharge unit is a notch, the second protrusion is provided with a protrusion at a position relative to the notch. At least one exhaust channel is formed between the protrusion and the notch, and the exhaust channel is connected to the exhaust groove.

The outer box body is provided with a plurality of retracted abutting portions extending downward from the first opening portion in the first accommodating portion, and each retracted abutting portion abuts against the outer side of the second accommodating portion of the inner box body.

Wherein, the outer box body is provided with a lower layer pull tab extending outward at a position opposite to the notch on the outer side of the bottom edge of the first connecting portion.

Wherein, the inner box body is provided with an upper pull tab extending outwardly at a position on the outer side of the bottom edge of the second connecting portion opposite to the protruding portion.

Wherein, the inner box body is provided with an inclined surface between a part of the bottom surface of the second accommodating portion and an edge of the second opening portion.

Among them, it further includes a sealing film, which seals the top surface of the first protrusion and the top surface of the second protrusion at the same time, and the adhesion between the weak sealing area and the sealing film is smaller than the adhesion between the non-weak sealing area and the sealing film and between the top surface of the first protrusion and the sealing film.

The inner edge of the top surface of the first protrusion is gradually inclined toward the outer edge of the top surface of the first protrusion, so that the inner edge of the first protrusion is higher than the outer edge, and the inner edge represents the edge of the top surface of the first protrusion close to the second protrusion, and the outer edge represents the other edge of the top surface of the first protrusion away from the second protrusion.

A plurality of first structural reinforcement ribs are disposed on the side surface of the first accommodating portion, and each of the first structural reinforcement ribs extends to a portion of the bottom surface of the first accommodating portion.

A plurality of second structural reinforcement ribs are disposed on the side surface of the second accommodating portion, and each second structural reinforcement rib extends to a portion of the bottom surface of the second accommodating portion.

The bottom surface of the first accommodating portion protrudes upward in the area surrounded by each of the first structural reinforcing ribs to form a first protruding surface.

The bottom surface of the second accommodating portion protrudes upward in the area surrounded by each second structural reinforcing rib to form a second protruding surface.

In summary, the present invention uses a common sealing film to seal the inner box body and the outer box body, thereby preventing the second food material and ingredients in the inner box body from flowing into the outer box body. Furthermore, in order to further prevent the sealed double-layer microwave container from bursting during the microwave process, the second gas discharge unit of the inner box body and the first gas discharge unit of the outer box body are designed to allow the gas generated during the heating process of the sealed double-layer microwave container to be discharged to the outside. Specifically, an exhaust channel is formed between the inner box body and the outer box body and communicates with the exhaust groove. A weak sealing area is provided on the inner box body. When the double-layer microwave container is heated, the gas generated during the heating process can be discharged to the outside. When the sealing film is sealed for microwave heating, the gas generated by the heating of the inner box body breaks through the weak sealing area and is discharged through the exhaust groove and the exhaust channel. The gas generated by the heating of the outer box body enters the exhaust groove and the exhaust channel through the gap between the inner box body and the outer box body and is discharged. Since there is no break between the outer box body and the sealing film, and the weak sealing area is in the inner box body, the food contained in the inner box body is not easy to flow out of the outer box body.

In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention.

Please refer to Figures 1 to 3. The present invention is a double-layer microwave container, comprising an outer box body 1 and an inner box body 2, wherein the inner box body 2 is stacked in the outer box body 1, wherein the outer box body 1 comprises a first opening portion 10, a first accommodating portion 12, a first connecting portion 14 and a first protruding portion 16, wherein the first opening portion 10 is provided at one end of the outer box body 1, and the first accommodating portion 12 is formed by the outer box body 1 being recessed from the first opening portion 10. The first connecting portion 14 is provided along the edge of the first opening portion 10 to protrude outward. The first protruding portion 16 is provided along the edge of the first connecting portion 14, and the horizontal height of the top surface of the first protruding portion 16 is higher than the horizontal height of the first connecting portion 14.

Furthermore, the inner box body 2 is overlapped in the first accommodating portion 12 of the outer box body 1, and the inner box body 2 includes a second opening portion 20, a second accommodating portion 22, a second connecting portion 24 and a second protruding portion 26, wherein the second opening portion 20 is provided at one end of the inner box body 2, and the second accommodating portion 22 is formed by the inner box body 2 being recessed from the second opening portion 20. The second connecting portion 24 is extended along the edge of the second opening portion 20 toward the first connecting portion 14, and a side of the second connecting portion 24 opposite to the first connecting portion 14 abuts against the first connecting portion 14. The second protruding portion 26 is provided along the edge of the second connecting portion 24, and the horizontal height of the top surface of the second protruding portion 26 is higher than the horizontal height of the second connecting portion 24, and the horizontal height difference between the first protruding portion 16 and the second protruding portion 26 is between 0.05 and 2.0 millimeters (mm).

As shown in FIG. 3 , the top surface of the first protrusion 16 and the top surface of the second protrusion 26 are connected to the same sealing film 4, so that the sealing film 4 seals the second opening 20. In this way, the outer box body 1, the inner box body 2 and the sealing film 4 form a sealed double-layer microwave container. Furthermore, the first accommodating portion 12 is used to hold the first food material, which may be rice and noodles, and the second accommodating portion 22 is used to hold the second food material and ingredients, which may be stew sauce or curry sauce, and the ingredients may be potatoes, carrots and meat. In this way, the second food material and ingredients in the inner box body 2 will not flow into the outer box body 1, let alone flow out of the outer box body 1, and during the heating process, the gas in the outer box body 1 and the inner box body 2 will slightly expand the sealing film 4, so that the inner box body 2 can be lifted up with the expansion of the sealing film 4, so that the gap between the inner box body 2 and the outer box body 1 becomes larger, thereby allowing the gas in the outer box to have a larger space to exhaust. It should be noted here that before the sealed double-layer microwave container is heated, the edge of the second protrusion 26 of the inner box body 2 and the second connecting portion 24 are against the first connecting portion 14 of the outer box body 1, so there is a very small gap between the inner box body 2 and the outer box body 1.

During the heating process of the sealed double-layer microwave container, the first food contained in the outer box body 1 and the second food contained in the inner box body 2 will continuously generate gas due to heating, so that the gas in the sealed double-layer microwave container gradually increases, and finally the sealing film will burst, thereby causing the food to splash and pollute the internal space of the microwave oven.

In order to avoid the aforementioned problems, in the present invention, please refer to FIG. 1 , the first protrusion 16 is provided with a first gas discharge unit 160, and the first gas discharge unit 160 is communicated with the outside before the sealed double-layer microwave container is heated, or the first gas discharge unit 160 is not communicated with the outside before the sealed double-layer microwave container is heated, and the first gas discharge unit 160 is communicated with the outside after heating.

As shown in FIG5 , the second protrusion 26 is provided with a second gas discharge unit 262. Before the sealed double-layer microwave container is heated, the second gas discharge unit 262 is not connected to the outside, but after heating, the second gas discharge unit 262 is connected to the outside. In this way, before the sealed double-layer microwave container is heated, the second food material and ingredients contained in the inner box body 2 will not flow into or out of the outer box body 1, and during the heating process of the sealed double-layer microwave container, the gas generated by the outer box body 1 can be discharged from the position of the first gas discharge unit 160, and the gas of the inner box body 2 can be discharged from the position of the second gas discharge unit 262 to the outer box body 1, and then further discharged from the position of the first gas discharge unit 160.

Furthermore, the position where the first protrusion 16 is provided for the first gas discharge unit 160 and the position where the second protrusion 26 is provided for the second gas discharge unit 262 are staggered with each other, so as to avoid the first gas discharge unit 160 and the second gas discharge unit 262 being in corresponding positions, so that the second food material and ingredients enter the first gas discharge unit 160 from the second gas discharge unit 262 and flow out of the outer box.

Taking the first gas discharge unit 160 as an example, which is connected to the outside world before the sealed double-layer microwave container is heated, the first gas discharge unit 160 is a notch set on the first protrusion 16 (as shown in Figure 1), and the notch connects the outside world and the first accommodating portion 12 of the outer box body 1, and the second gas discharge unit 262 can be a part of the top surface of the second protrusion 26 as a weak sealing area, and the other part of the second protrusion 26 is a non-weak sealing area. The adhesion between the weak sealing area and the sealing film 4 is less than the adhesion between the non-weak sealing area and the sealing film 4. In this way, when the sealed double-layer microwave container is in the microwave process, a gas discharge port 40 (as shown in Figure 6) will be formed at the position of the weak sealing area, so that the gas in the inner box body 2 can be discharged into the outer box body 1, and the gas in the outer box body 1 can be discharged to the outside world through the notch.

It should also be noted that during the heating process, as shown in FIG. 4 , the inner box body 2 will first be lifted together with the sealing film 4. When the gas pressure of the inner box body 2 gradually increases, as shown in FIG. 6 , the weakly sealed area is pushed open by the gas. At this time, the gas in either the outer box body 1 or the inner box body 2 has begun to leak to the outside, so the inner box body 2 will once again return to a state of resting against the outer box body. In other words, FIG. 4 and FIG. 6 show the relative position relationship between the inner box body 2 and the outer box body 1 at different times and different positions.

In this embodiment, please refer to FIG. 7 , there is a height difference between the weak seal area and the non-weak seal area of the second protrusion 26, and the height difference between the weak seal area and the non-weak seal area is 0.1 mm to 0.6 mm, for example: the height of the weak seal area is 0.1 mm to 0.6 mm lower than that of the non-weak seal area. In this way, when the film sealing machine seals the sealing film 4 on the top surface of the first protrusion 16 and the second protrusion 26, the adhesive force of the weak seal area will be less than that of the non-weak seal area. In another embodiment, please refer to FIG. 8 and FIG. 9 , the area of the weak seal area of the second protrusion 26 in contact with the sealing film 4 is smaller than that of the non-weak seal area, which will also make the adhesive force of the weak seal area less than that of the non-weak seal area when the sealing film 4 is sealed on the top surface of the first protrusion 16 and the second protrusion 26. For example, as shown in Fig. 8, the narrower position of the second protrusion 26 forms a weak sealing area, and the width of other positions remains unchanged. As shown in Fig. 9, the weak sealing area of the second protrusion 26 is partially concave downward, while the other part maintains the same horizontal height as the non-weak sealing area, so that the area of the weak sealing area contacting the sealing film 4 will be smaller than the area of the non-weak sealing area contacting the sealing film 4.

Furthermore, taking the example that the first gas discharge unit 160 is not connected to the outside world before the sealed double-layer microwave container is heated, and the first gas discharge unit 160 is connected to the outside world after heating, the first gas discharge unit 160 can also be a part of the top surface of the first protrusion 16 as a weak sealing area, and the other part of the first protrusion 16 is a non-weak sealing area, and the second gas discharge unit 262 is still a part of the top surface of the second protrusion 26 as a weak sealing area, and the other part of the second protrusion 26 is a non-weak sealing area.

In addition, in order to provide a better exhaust effect between the outer box body 1 and the inner box body 2, please refer to Figure 10. There is a gap between the first protrusion 16 and the second protrusion 26 to form an exhaust groove 30. When the first gas discharge unit 160 is in the form of a notch, the second protrusion 26 is provided with a protrusion 260 protruding at a position relative to the notch, and at least one exhaust channel 32 is formed between the protrusion 260 and the notch, and the exhaust channel 32 is connected to the exhaust groove 30.

As described above, as long as the sealing film 4 is sealed on the top of the first protrusion 16 and the second protrusion 26, the food can be preserved and prevented from leaking to the outside. In addition, when the double-layer microwave container is heated by microwaves to generate gas, the gas generated by the heating will break through the first gas discharge unit 160 and the second gas discharge unit 262, and the second gas discharge unit 262 will form a gas discharge port 40, thereby entering the exhaust groove 30, and then discharged to the outside through the exhaust channel 32 (as shown in Figures 6 and 10).

At this time, the sealing film 4 is still sealed on the top surface of the first protrusion 16 and the top surface of most of the second protrusion 26, so that when the double-layer microwave container is in a tilted state, the outer box body 1 is still shielded by the inner box body 2 from the first opening 10, so the first food will not leave the outer box body 1, and most areas of the inner box body 2 are still kept in a sealed state. Therefore, the second food is unlikely to flow to the outside from the gas discharge port 40, and even if the sauce of the second food accidentally flows out from the gas discharge port 40, it will first flow into the outer box body 1 from the exhaust groove 30, so that the sauce of the second food cannot flow to the outside.

In order to make the outer box body 1 and the inner box body 2 more closely attached to each other at the first connecting portion 14 and the second connecting portion 24 during the sealing process of the outer box body 1 and the inner box body 2 with the sealing film 4, please refer to FIG. 11. In the present invention, there is a height difference between the top surface of the second protrusion 26 and the top surface of the first protrusion 16. As shown in the positions marked H1 and H2 in FIG. 11, the height difference between the two is between 0.05 mm and 0.1 mm. Specifically, the top surface of the second protrusion 26 is higher than the top surface of the first protrusion 16. Since, during the process of sealing the outer box body 1 and the inner box body 2 with the sealing film 4, the sealing machine will seal the sealing film 4 by heat pressing, the sealing machine will press the sealing film 4 onto the top surface of the first protrusion 16 and the top surface of the second protrusion 26 at the same time, and the second protrusion 26 will be slightly squeezed and deformed by the sealing machine, so that the top surface of the second protrusion 26 and the top surface of the first protrusion 16 are at the same horizontal position, so that the top surface of the first protrusion 16 and the top surface of the second protrusion 26 are simultaneously adhered to the sealing film 4.

After the film sealing machine completes the film sealing, the second protrusion 26 wants to return to its original state, but is limited by the fact that the sealing film 4 has been sealed and connected with the first protrusion 16 and the second protrusion 26 at the same time, so that the first protrusion 16 is lifted by the sealing film 4, so that the first connecting portion 14 is forced upward, and the second protrusion 26 is pressed down by the sealing film 4, so that the second connecting portion 24 is forced downward. In this way, the first connecting portion 14 of the outer box body 1 and the second connecting portion 24 of the inner box body 2 are more closely attached to each other, and the first accommodating portion 12 of the outer box body 1 is sealed by the first connecting portion 14 and the second connecting portion 24, so that foreign objects are prevented from entering the first accommodating portion 12, and the first food will not fall out of the first accommodating portion 12, thereby achieving the purpose of hygiene and maintaining the flavor of the first food.

In order to further strengthen the tighter fit between the first connecting portion 14 and the second connecting portion 24, in the present invention, please refer to FIG. 11 , the inner edge of the top surface of the first protrusion 16 is gradually inclined toward the outer edge of the top surface of the first protrusion 16, so that the inner edge of the first protrusion 16 is higher than the outer edge, as shown in the positions marked S1 and S2 in FIG. 11 , and the inner edge represents the edge of the top surface of the first protrusion 16 close to the second protrusion 26, and the outer edge represents the other edge of the top surface of the first protrusion 16 away from the second protrusion 26. In this way, after the film sealing machine completes the film sealing, the first protrusion 16 can be slightly deformed to increase the force of the first connecting portion 14 exerting upward force, thereby increasing the force of the first connecting portion 14 and the second connecting portion 24 sticking to each other.

As shown in FIG. 10 and FIG. 7 , when the first gas discharge unit 160 is a notch and the double-layer microwave container is subjected to microwave heating to generate gas, the gas generated by the heating will break through the second gas discharge unit 262 to form a gas discharge port 40, thereby entering the exhaust groove 30 and then being discharged to the outside through the exhaust channel 32. If the gas discharge port 40 generated during the microwave process of the double-layer microwave container happens to be formed at the position of the second protrusion 26 opposite to the notch, the sauce of the second food may not completely flow into the first accommodating portion 12 from the exhaust groove 30, but will flow out to the outside from the exhaust channel 32 at the notch. Therefore, please refer to FIGS. 1 and 5. In the present invention, in addition to staggering the positions of the first gas discharge unit 160 and the second gas discharge unit 262, the second gas discharge unit 262 is further spaced apart from the first gas discharge unit 160. Thus, when the double-layer microwave container is in the microwave process, a gas discharge port 40 will be formed at the position of the second gas discharge unit 262. If the double-layer microwave container is tilted toward the first gas discharge unit 160 to the ground, since there is a certain distance between the gas discharge port 40 and the first gas discharge unit 160, the sauce of the second food has enough time to flow into the first accommodating portion 12 of the outer box body 1 from the gap between the first connecting portion 14 and the second connecting portion 24, and will not flow out from the first gas discharge unit 160 to the outside.

In the present invention, the first gas discharge unit 160 is 90 degrees toward the ground, and the distance between the second gas discharge unit 262 and the first gas discharge unit 160 is defined as the first gas discharge unit 160 is 30 to 150 degrees toward the ground, so that the liquid surface of the sauce of the second food does not touch the second gas discharge unit 262, or the distance between the second gas discharge unit 262 and the first gas discharge unit 160 is defined as more than the first gas discharge unit 160. The distance from the discharge unit 160 to the farthest position of the first opening portion 10 is more than half, but the actual implementation of the present invention is not limited to this. For example, when the second gas discharge unit 262 is separated from the first gas discharge unit 160 by a certain distance and the double-layer microwave container is tilted toward the first gas discharge unit 160, the sauce of the second food can first flow into the first accommodating portion 12 from the exhaust groove 30, which is the scope of the rights claimed by the present invention.

It should also be noted that when the double-layer microwave container is subjected to microwave heating to generate gas, the sealing film 4 expands and opens the weakly sealed area to generate a gas discharge port 40, so that the sealing film 4 and the weakly sealed area are in a non-sealed state. However, the sauce of the second food contained in the inner box body 2 can first flow into the first accommodating portion 12 from the exhaust groove 30, and will not flow out of the outer box body 1.

Furthermore, in order to prevent the inner box body 2 from shaking when the inner box body 2 is overlapped on the outer box body 1, please refer to Figure 13. In the present invention, the outer box body 1 is provided with a plurality of retracted abutment portions 120 extending downward from the first opening portion 10 in the first accommodating portion 12, and each retracted abutment portion 120 abuts against the outer side of the second accommodating portion 22 of the inner box body 2, so that the inner box body 2 is restricted by each retracted abutment portion 120 and does not shake.

Referring again to FIG. 12 , in the present invention, when the first gas discharge unit 160 is a notch, the outer box body 1 is provided with a lower pull tab 140 extending outward at a position on the outer side of the bottom edge of the first connecting portion 14 opposite to the first gas discharge unit 160. The inner box body 2 is provided with an upper pull tab 240 extending outward at a position on the outer side of the bottom edge of the second connecting portion 24 opposite to the protrusion 260. The user grasps the upper pull tab 240 with one hand and grasps the lower pull tab 140 with the other hand, and applies force to the upper pull tab 240 and the lower pull tab 140 in the separation direction, so as to facilitate the separation of the inner box body 2 from the outer box body 1. Furthermore, in order to allow the user to conveniently put the second food contained in the inner box body 2 into the outer box body 1, the inner box body 2 is provided with a tilting slope 220 between a part of the bottom surface of the second accommodating portion 22 and the edge of the second opening portion 20. The user can pour the second food into the outer box body 1 along the tilting slope 220.

In the present invention, please refer to FIG. 1 , a plurality of first structural reinforcement ribs 122 are provided on the side of the first accommodating portion 12, and each of the first structural reinforcement ribs 122 extends to a portion of the bottom surface of the first accommodating portion 12. A plurality of second structural reinforcement ribs 222 are provided on the side of the second accommodating portion 22, and each of the second structural reinforcement ribs 222 extends to a portion of the bottom surface of the second accommodating portion 22. The bottom surface of the first accommodating portion 12 protrudes upward in the area surrounded by the first structural reinforcement ribs 122 to form a first protruding surface 124. The bottom surface of the second accommodating portion 22 protrudes upward in the area surrounded by the second structural reinforcement ribs 222 to form a second protruding surface 224. The structural strength of the outer box body 1 and the inner box body 2 is enhanced by means of the first structural reinforcing rib 122 , the second structural reinforcing rib 222 , the first protruding surface 124 , the second protruding surface 224 and the like.

In summary, the present invention forms an exhaust channel 32 between the inner box body 2 and the outer box body 1, which communicates with the exhaust groove 30. The inner box body 2 is provided with a second gas discharge unit 262. When the double-layer microwave container is sealed with a sealing film 4 for microwave heating, the gas generated by the heating of the inner box body 2 breaks through the second gas discharge unit 262 and is discharged through the exhaust groove 30 and the exhaust channel 32. The gas generated by the heating of the outer box body 1 enters the exhaust groove 30 and the exhaust channel 32 through the gap between the inner box body 2 and the outer box body 1 and is discharged. Furthermore, since there is no breach between the outer box body 1 and the sealing film 4, and the second gas discharge unit 262 is in the inner box body 2, the food contained in the inner box body 2 is not easy to flow out of the outer box body 1, especially since the second gas discharge unit 262 is arranged at a position far away from the exhaust passage 32. If the double-layer microwave container is tilted toward the exhaust passage 32 and the exhaust groove 30, since the second gas discharge unit 262 is far away from the exhaust passage 32, even if the sauce contained in the inner box body 2 accidentally flows into the exhaust groove 30, it will first flow into the outer box body 1 from the exhaust groove 30. In this way, the present invention solves the problem of the inner box body 2 of the traditional double-layer microwave container flowing to the outside from the breach of the sealing film 4 while maintaining the exhaust function.

The above detailed description is a specific description of the feasible embodiments of the present invention. However, the aforementioned embodiments are not intended to limit the patent scope of the present invention. Any equivalent implementation or modification that does not deviate from the technical spirit of the present invention should be included in the patent scope of this case.

1: Outer box body 10: First opening part 12: First accommodating part 120: Inwardly contracted abutting part 122: First structural reinforcement rib 124: First protruding surface 14: First connecting part 140: Lower pull tab 16: First protruding part 160: First gas discharge unit 2: Inner box body 20: Second opening part 22: Second accommodating part 220: Inclined slope 222: Second structural reinforcement rib 224: Second protruding surface 24: Second connecting part 240: Upper pull tab 26: Second protruding part 260: Protruding part 262: Second gas discharge unit 30: Exhaust groove 32: Exhaust channel 4: Sealing film 40: Gas exhaust port H1, H2, S1, S2: Altitude difference markings

Figure 1 is a three-dimensional exploded view of the present invention. Figure 2 is a three-dimensional assembly view of the present invention. Figure 3 is a cross-sectional view of A-A of Figure 2. Figure 4 is a schematic diagram of the boxed portion of Figure 3 being sealed with the same sealing film and then heated. Figure 5 is a three-dimensional schematic diagram of the inner box body being provided with a second gas discharge unit. Figure 6 is a schematic diagram of the outer box body and the inner box body being sealed with the same sealing film and then heated to open the second gas discharge unit. Figure 7 is a schematic diagram of one implementation of the second gas discharge unit being a weak sealing area. Figure 8 is a schematic diagram of another implementation of the second gas discharge unit being a weak sealing area. Figure 9 is a schematic diagram of another implementation of the second gas discharge unit being a weak sealing area. Figure 10 is a schematic diagram of the first gas discharge unit being a notch, an exhaust groove, and an exhaust channel. . FIG. 11 is a schematic diagram showing the height difference between the first protrusion and the second protrusion and the height difference between the inner edge and the outer edge of the first protrusion. FIG. 12 is a schematic diagram showing that the upper pull tab of FIG. 10 can be pulled upward. FIG. 13 is another cross-sectional schematic diagram of the present invention.

1: Outer box 10: First opening 12: First accommodating portion 120: Inwardly contracted abutting portion 122: First structural reinforcement rib 124: First protruding surface 14: First connecting portion 140: Lower pull tab 16: First protruding portion 160: First gas discharge unit 2: Inner box 20: Second opening 22: Second accommodating portion 220: Inclined slope 222: Second structural reinforcement rib 224: Second protruding surface 24: Second connecting portion 240: Upper pull tab 26: Second protruding portion 260: Protruding portion 4: Sealing film 40: Gas discharge port

Claims (9)

A double-layer microwave container comprises: an outer box body, comprising: a first opening portion, arranged at one end of the outer box body; a first accommodating portion, the first accommodating portion is recessed at a position of the outer box body relative to the first opening portion, and the first accommodating portion is communicated with the first opening portion; a first connecting portion, formed by extending outward from the edge of the first opening portion; and a first protrusion, arranged at the edge of the first connecting portion; an inner box body, the inner box body is overlapped in the first accommodating portion of the outer box body, and covers the first opening portion, and the inner box body is The box body includes: a second opening portion, which is arranged at one end of the inner box body; a second accommodating portion, which is recessed at a position of the inner box body opposite to the second opening portion, and the second accommodating portion is connected to the outside through the first opening portion and the second opening portion; a second connecting portion, which is formed by protruding outward along the edge of the second opening portion, and a side of the second connecting portion opposite to the first connecting portion abuts against the first connecting portion; and a second protruding portion, which is arranged between the edge of the second connecting portion and the first protruding portion. The double-layer microwave container as described in claim 1 further comprises a sealing film, which seals the top surface of the first protrusion and the top surface of the second protrusion at the same time. A double-layer microwave container as described in claim 2, wherein the outer box body is provided with a first gas discharge unit on the first protrusion, and the second protrusion is provided with a second gas discharge unit. A double-layer microwave container as described in claim 3, wherein the position where the first protrusion is provided with the first gas discharge unit and the position where the second protrusion is provided with the second gas discharge unit are staggered with each other. As described in claim 4, the first gas discharge unit is a notch provided in the first protrusion, the second gas discharge unit can be a portion of the top surface of the second protrusion as a weak sealing area, and the other part of the second protrusion is a non-weak sealing area, and the adhesion between the weak sealing area and the sealing film is less than the adhesion between the non-weak sealing area and the sealing film. A double-layer microwave container as described in claim 5, wherein a gap is provided between the first protrusion and the second protrusion to form an exhaust groove. A double-layer microwave container as described in claim 6, wherein the second protrusion is provided with a protruding portion at a position relative to the notch, and at least one exhaust channel is formed between the protruding portion and the notch, and the exhaust channel is connected to the exhaust groove. A double-layer microwave container as described in claim 1, wherein the inner box body is provided with an inclined slope between a portion of the bottom surface of the second accommodating portion and the edge of the second opening portion. As described in claim 1, the double-layer microwave container, wherein the outer box body is provided with a plurality of retracted abutment portions extending downward from the first opening portion in the first accommodating portion, and each of the retracted abutment portions abuts against the outer side of the second accommodating portion.