JP3145971U - Lunch box with heating function - Google Patents

Abstract

The present invention provides a lunch box with a heating function capable of heating a lunch box before eating and eating a warm lunch box during a meal.
In a lunch box 10 having a lunch box 11 having an opening in the upper part, a storage case 12 in which the lunch box 11 is stored, and a lid 13 of the lunch box 11 or the storage case 12, the inside of the storage case 12 is provided. A heating bag 14 having an upper portion that contacts the bottom of the lunch box 11 and sealed with an aqueous sodium acetate solution is disposed under the lunch box 11 disposed on the side of the heating bag 14. A trigger accommodating portion 16 is formed protrudingly connected to the heating bag 14 and accommodates a heat generating trigger member 15 for inducing heat generation by impacting the aqueous sodium acetate solution. Further, the accommodating case 12 accommodates the trigger accommodating portion 16. A notch 17 is formed to project outside the case 12.
[Selection] Figure 1

Description

The present invention relates to a lunch box with a heating function that heats a lunch container that contains a cooked food before a meal to provide a warm cooked meal.

Conventionally, when eating a bento, the cooking time and the meal time are largely shifted, and therefore the cooked food is generally in a cold state. For this reason, before eating a lunch box, heating a lunch box with a microwave oven is performed. In addition, a latent heat storage material such as sodium acetate is sealed in a metal container such as stainless steel or brass, and a heated material (lunch box) is placed in the heat conduction material in the thermal storage room where a fluid heat conduction material is placed on the top. ) Has been proposed (see, for example, Patent Document 1).

JP 62-47322 A

However, when a lunch box is heated in a microwave oven, there is a problem that a large amount of lunch box cannot be heated at one time, and that the heated lunch box cannot be kept warm. Furthermore, when a microwave oven is used, for example, there is a problem that cooked food that is preferably eaten in a cold state such as a seasoning or a salad is also heated. Moreover, in the invention described in Patent Document 1, since the container is made of metal, there is a problem that the weight is heavy and the convenience is inferior. In addition, when there are cooked foods and salads that are not suitable for heat insulation, the food suitable for heat insulation and the food suitable for heat insulation must be separately stored in containers, which causes problems in the transportation and carrying of lunch boxes. Arise.

The present invention has been made in view of such circumstances, and a lunch box with a heating function capable of heating a lunch container that holds a cooked food before eating and eating a warm cooked meal during the meal. The purpose is to provide.

A lunch box with a heating function according to the present invention that meets the above-mentioned object is a lunch box that includes a lunch box having an opening at the top, a storage case that stores the lunch box, and the lid of the lunch box or the storage case. In the box
A heating bag having an upper portion in contact with a bottom portion of the lunch box and having a sodium acetate aqueous solution sealed therein is disposed under the lunch box disposed in the storage case, and a side portion of the heating bag. In addition, a trigger accommodating portion is formed protrudingly communicating with the heating bag and accommodating a heat generation trigger member that induces heat generation by applying an impact (physical impact) to the sodium acetate aqueous solution, and the storage case A notch for projecting the trigger accommodating portion to the outside of the accommodating case is formed.

In the lunch box with a heating function according to the present invention, the lunch box is provided with a rice storage part for storing cooked rice and a side dish storage part for storing side dishes, and the heating bag stores the cooked rice serving as a heating object. It can be placed only under the section.

In the lunch box with a heating function according to the present invention, the lunch box is provided with a rice storage part for storing cooked rice and a side dish storage part for storing side dishes, and the heating bag stores the cooked rice serving as a heating object. And a part or all of the side dish storage part.

In the lunch box with a heating function according to the present invention, the lunch container is provided with a rice storage unit for storing cooked rice and a side dish storage unit for storing side dishes, which are stored in the storage case. And the said heating bag can be arrange | positioned under the said cooked rice storage part used as a heating target object.

In the lunch box with a heating function according to the present invention, the upper surface of the heating bag is preferably in contact with the shape of the heating object.
Moreover, it is preferable that a plurality of projecting portions are arranged in a distributed manner at the bottom of the heating bag.
Furthermore, you may provide the heat insulating material matched with the lower surface shape of this heating bag in the lower surface of the said heating bag.

In the lunch box with a heating function according to the present invention, the heat generation trigger member includes a hook-like overhanging portion and a hook portion formed around the overhanging portion, and the overhanging portion is subjected to an external load load. It is possible to instantaneously change from a state protruding to one side to a state protruding to the other side.

In the lunch box with a heating function according to the present invention, since the heating bag is arranged under the lunch box arranged in the storage case, the cooked food can be accommodated in the lunch box without trouble. The heating bag can be collected together with the storage case and the lid. And since the trigger accommodating part in which the heat generating trigger member is accommodated protrudes to the outside of the storage case, before eating the lunch box, from the outside of the storage case, that is, with the lid covered, through the heat generating trigger member The sodium acetate aqueous solution can be impacted, and heating of the lunch box can be started easily and hygienically. Moreover, since the heating bag is in contact with the bottom of the lunch box, the heat generated in the heating bag can be efficiently transmitted to the lunch box and heated, and heat can be kept. Furthermore, since the sodium acetate aqueous solution is sealed in the heating bag, the heating bag can be reused by boiling and disinfecting the heating bag together with the lunch box, the storage case, and the lid.

In the lunch box with a heating function according to the present invention, the lunch container is provided with a rice storage unit for storing cooked rice and a side dish storage unit for storing side dishes, and the heating bag is only under the cooked rice storage unit to be heated. In the case where it is arranged, the cooked rice can be heated and kept warm. Here, a side dish storage unit stores a type of side dish suitable for heating in a section close to the cooked rice storage unit, and stores a side dish unsuitable for heating (for example, seasoning, salad, fruit, etc.) in a section away from the cooked rice storage unit. By doing so, it is possible to warm and keep the side dishes suitable for heating at the same time as heating and keeping the cooked rice.

In the lunch box with a heating function according to the present invention, the lunch container is provided with a rice storage unit for storing cooked rice and a side dish storage unit for storing side dishes, and the heating bag stores the cooked rice storage unit and the side dish as a heating object. When it arrange | positions under a part or all of a part, a part or all of cooked rice and a side dish can be heated and heat-retained.

In the lunch box with a heating function according to the present invention, the lunch container is provided with a rice storage part for storing the rice and a side dish storage part for storing the side dishes separately, and the rice storage part is stored in the storage case and heated. When the bag is arrange | positioned under the cooked rice storage part used as a heating target object, only cooked rice can be heated and heat-retained.

In the lunch box with a heating function according to the present invention, when the upper surface of the heating bag comes into contact with the shape of the heating object, the heating object can be reliably and efficiently heated and kept warm.

In the lunch box with a heating function according to the present invention, when a plurality of projecting portions are dispersedly arranged at the bottom of the heating bag, a heat insulating material is provided on the lower surface of the heating bag in accordance with the shape of the lower surface of the heating bag. In this case, heat transfer from the heating bag to the bottom of the storage case can be suppressed, and the object to be heated can be efficiently heated and kept warm.

In the lunch box with a heating function according to the present invention, the heat generation trigger member includes a hook-like overhang part and a hook part formed around the overhang part, and the overhang part is on one side by an external load load. When it changes instantly from the overhanging state to the overhanging state, changing the overhanging state of the overhanging part can apply a physical impact to the aqueous sodium acetate solution with a simple operation, making it easy to heat the lunch box Can start.

Next, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention.
Here, FIG. 1 is a perspective view of a lunch box with a heating function according to the first embodiment of the present invention, FIGS. 2A and 2B are perspective views of a heat generation trigger member of the lunch box with the heating function, (C) is an explanatory view of a heat generating trigger member housed in the trigger housing portion, FIG. 3 is a perspective view of a lunch box with a heating function according to the second embodiment of the present invention, and FIG. 4 is a third view of the present invention. It is a perspective view of the lunch box with a heating function concerning an embodiment.

As shown in FIG. 1, a lunch box 10 with a heating function according to the first embodiment of the present invention includes a lunch box 11 having an opening in the upper part, a storage case 12 in which the lunch box 11 is stored, And a lid 13 of the storage case 12. And under the lunch box 11 arrange | positioned in the storage case 12, the heating bag 14 by which upper part contact | abutted the bottom part of the lunch box 11 and the sodium acetate aqueous solution was sealed inside is arrange | positioned. On the side of this, a trigger accommodating portion 16 is formed protrudingly communicating with the heating bag 14 and accommodating a heat generating trigger member 15 that induces heat generation by impacting the aqueous sodium acetate solution. A notch 17 for projecting the trigger accommodating portion 16 to the outside of the accommodating case 12 is formed. Details will be described below.

The lunch box 11 is formed using a heat-resistant plastic that can withstand boiling, such as ABS resin, propylpyrene, and the like, and includes a cooked rice storage unit 18 for storing cooked rice and a side dish storage unit 19 for storing side dishes. Yes. Further, the side dish storage unit 19 is divided into a plurality of, for example, three side dish storage sections 20, 21, and 22.

The storage case 12 is formed of a heat-resistant plastic that can withstand boiling, such as ABS resin and propylpyrene, and when the lunch box 11 is stored, a peripheral wall portion 23 that protects the side of the lunch box 11, and a lunch box A bottom protecting part 24 for protecting the bottom of the container 11 is provided. And in the area | region facing the bottom part of the side dish storage part 19 of the lunch box 11 accommodated in the bottom protection part 24, the mounting base 25 which does not contact | abut the bottom part of the side dish storage part 19 and supports the storage part 19 protrudes. Is formed. For this reason, when the lunch box 11 is stored, a space 26 is formed adjacent to the mounting table 25 and below the bottom of the cooked rice storage 18, and the outer shape of the heating bag 14 is the shape of the space 26. For example, a polyethylene sheet having a thickness of 0.1 to 0.2 mm is used. Further, a cutout 17 extending from the upper end of the peripheral wall portion 23 to the position of the connection portion with the inner surface of the bottom protection portion 24 of the storage case 12 is formed on the inner surface of the bottom protection portion 24 of the storage case 12. It is formed perpendicular to the surface. As a result, the heating bag 14 is stored in the space portion 26 so that the trigger storage portion 16 protrudes outside from the lower portion of the notch 17 formed in the peripheral wall portion 23 of the storage case 12. It can arrange | position so that it may contact | abut closely according to the shape of the bottom part of the cooked rice storage part 18. FIG.

Here, from the heating bag 14, it is necessary to generate | occur | produce the heat | fever required in order to heat the temperature of the cooked rice accommodated in the cooked rice storage part 18 to 40-60 degreeC, for example. For this reason, the thickness of the heating bag 14 needs to be a thickness that can hold the sodium acetate aqueous solution in an amount necessary to cover this amount of heat, and the thickness of the space 26 (the height of the mounting table 25) is the heating bag. 14 based on the thickness. And if the thickness of the space part 26 is determined, the height of the surrounding wall part 23 will be determined based on the height of the lunch box 11 so that the thickness of the space part 26 may be ensured. Furthermore, a plurality of protrusions 27 made of the same material as the heating bag 14 are distributed and arranged at the bottom of the heating bag 14. By disposing the projecting portions 27 on the bottom of the heating bag 14, it is possible to prevent the bottom of the heating bag 14 from coming into close contact with the bottom protection portion 24 of the storage case 12. As a result, heat is suppressed from being transferred from the bottom of the heating bag 14 to the bottom protecting part 24 of the storage case 12.

The lid 13 is formed of a heat-resistant plastic that can withstand boiling, such as ABS resin, and covers the storage case 12 in which the lunch box 11 is stored, and covers the cooked rice and side dish storage unit 19 stored in the cooked rice storage unit 18. Covers the stored side dishes. Then, the lid 13 covers the top plate member 28 that integrally covers the top of each opening of the cooked rice storage portion 18 and the side dish storage portion 19 when the lid 13 covers the storage case 12, and the edge of the top plate member 28. It has a side wall member 29 that is erected downward and covers the upper side region of the outer surface of the peripheral wall portion 23 of the storage case 12. For this reason, when the cover 13 is put on the storage case 12, the side wall member 29 covers only the upper side of the notch 17 formed in the peripheral wall portion 23 of the storage case 12, and the lower side of the notch 17 is exposed. This does not hinder the portion 16 from protruding from the lower portion of the notch 17 formed in the peripheral wall portion 23 of the storage case 12.

The exothermic trigger member 15 is formed of metal, for example, steel, and includes a flange-shaped protruding portion 30 and a flange portion 31 formed around the protruding portion 30 as shown in FIG. Yes. And the overhang | projection part 30 of the heat generation | occurrence | production trigger member 16 receives the load from the outside which presses the overhang | projection part 30, and from the state which protruded to the one side (upward), as shown to FIG. It changes instantaneously to the state of projecting downward. Further, when an external load is applied to press the overhanging portion 30 in the state of protruding to the other side shown in FIG. 2 (B), it protrudes to the one side shown in FIG. 2 (A) from the state of protruding to the other side. The overhanging portion 30 of the heat generation trigger member 16 can change the overhanging state according to the direction of the load applied to the overhanging portion 30 from the outside.

Therefore, when the overhanging state of the overhanging portion 30 changes instantaneously, a physical impact can be applied to the sodium acetate aqueous solution around the overhanging portion 30. And since the trigger accommodating part 16 is connected to the heating bag 14, the physical impact added to the sodium acetate aqueous solution around the overhang | projection part 30 propagates to the sodium acetate aqueous solution in the heating bag 14, and the heating bag 14 Heat generation can be started in the aqueous sodium acetate solution. As shown in FIG. 2C, the communicating portion between the trigger accommodating portion 16 and the heating bag 14 has a pair of latching portions 32 that prevent the heat generating trigger member 15 from moving into the heating bag 14. Is provided.

Next, the usage method of the lunch box 10 with a heating function which concerns on the 1st Embodiment of this invention is demonstrated.
First, the heating bag 14 is boiled, and sodium acetate in the heating bag 14 is completely dissolved. Then, the heating bag 14 is gradually cooled to, for example, 10 ° C. or less, so that the aqueous sodium acetate solution in the heating bag 14 is supersaturated. At this time, since sodium acetate is not deposited in the heating bag 14, the sodium acetate aqueous solution is also in a supercooled state.

Next, the supersaturated (supercooled) heating bag 14 is stored at the bottom of the storage case 12, and the trigger storage portion 16 provided on the heating bag 14 is protruded outward from the lower portion of the notch 17 formed in the storage case 12. To do. Here, the lunch box 11 in which the cooked rice is stored in the cooked rice storage portion 18 and the side dish storage portion 19 is stored in the storage case 12. At this time, the mounting table 25 is not in contact with the bottom of the side dish storage unit 19 to support the storage unit 19, and the upper surface of the heating bag 14 is in contact with the bottom of the cooked rice storage unit 18 to support the cooked rice storage unit 18. . Then, the lid 13 is put on the storage case 12 in which the lunch box 11 is stored. Thereby, it becomes possible to convey the lunch box 10 with a heating function. At this time, the lower side of the cutout 17 provided in the storage case 12 is exposed, and the trigger storage portion 16 protrudes from the cutout 17 of the storage case 12 to the outside.

When eating a bento box, the overhanging state is instantaneously applied by applying a load from the outside to the overhanging portion 30 of the heat generating trigger member 15 housed in the trigger housing portion 16 protruding outside from the notch 17 of the storage case 12. Change. When the overhanging state of the overhanging portion 30 changes instantaneously, a physical impact is applied to the sodium acetate aqueous solution around the overhanging portion 30, and the trigger accommodating portion 16 and the heating bag 14 are in communication with each other. A physical impact applied to the surrounding aqueous sodium acetate solution propagates to the aqueous sodium acetate solution in the heating bag 14. Thereby, solidification is started in the supercooled sodium acetate aqueous solution, and heat of solidification is generated. Here, since the heating bag 14 is in close contact with the bottom of the cooked rice storage portion 18, the heat of solidification generated in the heating bag 14 can be efficiently transmitted to the cooked rice storage portion 18 to heat the cooked rice. Insulation can also be performed. Since the protruding portions 27 are distributed on the bottom of the heating bag 14, it is possible to prevent the bottom of the heating bag 14 from coming into close contact with the bottom of the storage case 12, and the bottom of the storage case 12 from the bottom of the heating bag 14. Heat is suppressed from being transferred to the surface.

Since the heat generating trigger member 15 can be operated with the lid 13 left on to apply an impact to the aqueous sodium acetate solution, heating of the cooked rice storage unit 18 can be started easily and hygienically. And since the heating bag 14 is arrange | positioned only under the cooked rice storage part 18, the side dish of the kind suitable for a heating in the area | region close to the cooked rice storage part 18 in the side dish storage sections 20, 21, and 22 of the side dish storage part 19 is provided. When storing and storing unsuitable side dishes (for example, seasonings, salads, fruits, etc.) in the area away from the cooked rice storage section 18 in the side dishes storage sections 20, 21, and 22, simultaneously with heating and heat insulation of cooked rice The side dishes suitable for heating can be warmed and kept warm.

When eating a lunch box, the heating bag 14 can be stored in the storage case 12. For this reason, the heating bag 14 can be recovered together with the lunch box 11, the storage case 12, and the lid 13, and the heating bag 14 is heated by being boiled and disinfected together with the lunch box 11, the storage case 12, and the lid 13. The sodium acetate in the bag 14 can be completely dissolved. Then, by gradually cooling the heating bag 14, the sodium acetate aqueous solution in the heating bag 14 can be brought into a supersaturated state (supercooled state), and the heating bag 14 can be reused.

As shown in FIG. 3, the lunch box 33 with a heating function according to the second embodiment of the present invention has a heating bag 34 as compared with the lunch box 10 with a heating function according to the first embodiment. It is characterized by being arranged below all of the cooked rice storage unit 18 and the side dish storage unit 19 that are to be heated. For this reason, only the heating case 34 and the storage case 35 that accommodates the heating bag 34 will be described, and the same components as those in the lunch box 10 with the heating function are denoted by the same reference numerals and detailed description thereof is omitted. Moreover, since the usage method of the lunch box 33 with a heating function is the same as the usage method of the lunch box 10 with a heating function, description is abbreviate | omitted.

The storage case 35 is formed of a heat-resistant plastic that can withstand boiling, such as ABS resin and propylpyrene, and when the lunch box 11 is stored, a peripheral wall portion 36 that protects the side of the lunch box 11, and a lunch box A bottom protecting part 37 that protects the bottom of the container 11 is provided. When the lunch box 11 is stored in the storage case 35, a space is formed below the bottom of the cooked rice storage 18 and the bottom of the side dish storage 19, and the outer shape of the heating bag 34 is the space. For example, a polyethylene sheet having a thickness of 0.1 to 0.2 mm is used. Further, a cutout 38 extending from the upper end of the peripheral wall portion 36 to the position of the connection portion with the inner surface of the bottom protective portion 37 of the storage case 35 is formed on the peripheral wall portion 36 surrounding the space portion with respect to the bottom protective portion 37 of the storage case 35 It is formed vertically. As a result, the heating bag 34 is stored in the space portion so that the trigger storage portion 16 protrudes to the outside from the lower portion of the notch 38 formed in the peripheral wall portion 35 of the storage case 12, so that the upper surface of the heating bag 34 is stored in the cooked rice. It can arrange | position so that it may contact | abut closely according to the shape of the bottom part of the part 18 and the side part of the side dish storage part 19, and can heat both rice and a side dish by heating.

Here, from the heating bag 34, the heat | fever required in order to heat the temperature of the cooked rice accommodated in the cooked rice storage part 18 and the side dish accommodated in the side dish storage part 19 to 40-60 degreeC is generated. There is a need. For this reason, the thickness of the heating bag 34 needs to be a thickness that can hold the sodium acetate aqueous solution in an amount necessary to cover this amount of heat, and the thickness of the space is determined based on the thickness of the heating bag 34. . And if the thickness of a space part is determined, the height of the surrounding wall part 36 will be determined based on the height of the lunch container 11 so that the thickness of a space part may be ensured. Further, the protruding portion 27 a made of the same material as the heating bag 34 is dispersedly arranged at the bottom of the heating bag 34. By disposing the protrusions 27 a on the bottom of the heating bag 34, it is possible to prevent the bottom of the heating bag 34 from coming into close contact with the bottom protection part 37 of the storage case 35. As a result, heat is suppressed from being transferred from the bottom of the heating bag 34 to the bottom of the storage case 35.

As shown in FIG. 4, the lunch box 39 with a heating function according to the third embodiment of the present invention has a lunch box 40 with a lunch box 40 with a heating function according to the first embodiment. The rice storage unit 41 for storing cooked rice and the side dish storage unit 42 for storing side dishes are provided separately, the rice storage unit 41 is stored in the storage case 43, and the heating bag 44 stores the cooked rice serving as a heating object. The trigger accommodating portion 16 disposed under the portion 41 and formed in the heating bag 44 is characterized in that it protrudes from the notch 45 formed in the accommodating case 43 to the outside of the accommodating case 43. Hereinafter, although it demonstrates in detail, the same code | symbol is attached | subjected to the component same as the lunch box 10 with a heating function, and description is abbreviate | omitted.

The cooked rice storage unit 41 and the side dish storage unit 42 are formed using heat-resistant plastic that can withstand boiling, such as ABS resin, propylpyrene, and the like. And the four corners of the bottom outer surface of the side dish storage part 42 are provided with projections (not shown) that fit into the four corners of the opening of the cooked rice storage part 41, and the side dish storage part 42 can be stacked on the cooked rice storage part 41. Further, the side dish storage section 42 is divided into a plurality of, for example, five side dish storage sections 46, 47, 48, and 50.

The storage case 43 is formed of a heat-resistant plastic that can withstand boiling, for example, ABS resin, propylpyrene, and a peripheral wall portion 51 that protects the side portion of the cooked rice storage portion 41 when the cooked rice storage portion 41 is stored. The bottom protector 52 that protects the bottom of the cooked rice storage 41 is provided. When the cooked rice storage unit 41 is stored in the storage case 43, a space is formed under the bottom of the cooked rice storage unit 41, and the outer shape of the heating bag 44 is adjusted to the shape of the space, for example, thickness Is formed using a 0.1 to 0.2 mm polyethylene sheet. The cutout 45 is formed in the peripheral wall portion 51 surrounding the space portion perpendicular to the range from the upper end of the peripheral wall portion 51 to the position of the connection portion with the bottom inner surface of the storage case 43. Thus, the heating bag 44 is accommodated in the space so that the trigger accommodating portion 16 protrudes outside from the lower portion of the notch 45 formed in the accommodating case 43, so that the upper surface of the heating bag 44 is the bottom of the cooked rice accommodating portion 41. It can arrange | position so that it may contact | abut closely according to the shape.

Here, from the heating bag 44, it is necessary to generate the heat necessary for heating the temperature of the cooked rice stored in the cooked rice storage unit 41 to, for example, 40 to 60 ° C. For this reason, the thickness of the heating bag 44 needs to be a thickness that can hold the sodium acetate aqueous solution in an amount necessary to cover this amount of heat, and the thickness of the space is determined based on the thickness of the heating bag 44. . And if the thickness of a space part is determined, the height of the surrounding wall part 51 will be determined based on the height of the cooked rice storage part 41 so that the thickness of a space part may be ensured. Further, the protrusions 53 made of the same material as the heating bag 44 are dispersedly arranged at the bottom of the heating bag 44. By disposing the protrusions 53 on the bottom of the heating bag 44, it is possible to prevent the bottom of the heating bag 44 from coming into close contact with the bottom protection part 52 of the storage case 43. As a result, heat is suppressed from being transferred from the bottom of the heating bag 44 to the bottom protection part 52 of the storage case 43.

The lid 54 is made of heat-resistant plastic that can withstand boiling, for example, ABS resin, covers the side dish storage part 42 of the lunch box 40 and covers the side dish stored in the side dish storage part 42. When the lid 54 covers the side wall storage portion 42, the lid 54 stands vertically downward on the top plate member 55 that integrally covers the upper part of the opening of the side wall storage portion 42 and the edge of the top plate member 55. And a side wall member 56 that covers the side portion of the side dish storage portion 42. For this reason, when the lid 54 is put on the side wall storage portion 42 of the lunch box 40, the notch 45 formed in the peripheral wall portion 51 of the storage case 43 is not covered by the side wall member 56 of the lid 54, and the trigger storage portion 16 is stored. This does not hinder the projection of the cutout 45 formed on the peripheral wall 51 of the case 43 from the lower portion.

Next, the usage method of the lunch box 39 with a heating function which concerns on the 3rd Embodiment of this invention is demonstrated.
First, the heating bag 44 is boiled, and sodium acetate in the heating bag 44 is completely dissolved. Then, the heating bag 44 is gradually cooled to bring the sodium acetate aqueous solution in the heating bag 44 into a supersaturated state. At this time, since sodium acetate is not deposited in the heating bag 44, the sodium acetate aqueous solution is also in a supercooled state.

Next, the supersaturated (supercooled) heating bag 44 is stored at the bottom of the storage case 43, and the trigger storage portion 16 provided on the heating bag 44 is protruded outside from the lower portion of the notch 45 formed in the storage case 43. To do. Here, the cooked rice storage unit 41 storing the cooked rice is stored in the storage case 43, and the side dish storage unit 42 storing the side dishes is placed on the cooked rice storage unit 41. At this time, the upper surface of the heating bag 44 is in contact with the bottom of the cooked rice storage unit 41 to support the cooked rice storage unit 41. Then, the lid 54 is put on the side dish storage portion 42 in which the side dishes are stored. Thereby, it becomes possible to convey the lunch box 39 with a heating function. At this time, the trigger accommodating part 16 protrudes outside from the notch 45 provided in the accommodating case 43.

When eating a bento box, the overhanging state is instantaneously applied by applying a load from the outside to the overhanging portion 30 of the heat generating trigger member 15 housed in the trigger housing portion 16 protruding outside from the notch 45 of the storage case 43. Change. When the overhanging state of the overhanging portion 30 changes instantaneously, a physical impact is applied to the sodium acetate aqueous solution around the overhanging portion 30, and the trigger accommodating portion 16 and the heating bag 44 communicate with each other. The physical impact applied to the surrounding aqueous sodium acetate solution propagates to the aqueous sodium acetate solution in the heating bag 44. Thereby, solidification is started in the supercooled sodium acetate aqueous solution, and heat of solidification is generated. Here, since the heating bag 44 is in close contact with the bottom of the cooked rice storage unit 41, the heat of solidification generated in the heating bag 44 can be efficiently transmitted to the cooked rice storage unit 41 and the cooked rice can be heated. Insulation can also be performed. Since the protrusions 53 are distributed on the bottom of the heating bag 44, the bottom of the heating bag 44 is prevented from coming into close contact with the bottom protection portion 52 of the storage case 43. Heat is suppressed from being transferred to the bottom protection part 52 of 43.

Since the heat generation trigger member 15 can be operated with the lid 54 still on to apply an impact to the aqueous sodium acetate solution, heating of the cooked rice storage unit 41 can be started easily and hygienically. And since the heating bag 44 is arrange | positioned only under the cooked rice storage part 41, the side dish storage part 42 is not heated. And when eating lunch, the heating bag 44 can be made into the state accommodated in the storage case 43. FIG. Therefore, the heating bag 44 can be collected together with the cooked rice storage unit 41, the side dish storage unit 42, the storage case 43, and the lid 54, and the heating bag 44 is recovered from the cooked rice storage unit 41, the side dish storage unit 42, and the storage case 43. By boiling and disinfecting together with the lid 54, sodium acetate in the heating bag 44 can be completely dissolved. Then, by slowly cooling the heating bag 44, the sodium acetate aqueous solution in the heating bag 44 can be brought into a supersaturated state (supercooled state), and the heating bag 44 can be reused.

As mentioned above, although embodiment of this invention was described, this invention is not limited to this embodiment, The change in the range which does not change the summary of invention is possible, Each above-mentioned implementation is possible. The case where the lunch box with a heating function of the present invention is configured by combining some or all of the forms and the modified examples is also included in the scope of the right of the present invention.
For example, in the lunch box with a heating function according to the second embodiment, the heating object can be a part of the cooked rice storage unit and the side dish storage unit. In this case, the shape of the heating bag and the shape of the space in which the heating bag is inserted are determined so that the heating bag is disposed below part of the cooked rice storage unit and the side dish storage unit.
Further, in the first to third embodiments, a heat insulating material that matches the shape of the lower surface of the heating bag is provided on the lower surface of the heating bag to prevent the lower surface of the heating bag from coming into contact with the bottom protective part of the storage case. May be.
Further, in the third embodiment, the side wall member of the lid may cover the range up to the upper side of the cutout formed in the peripheral wall portion of the storage case. It is also possible to arrange the parts side by side and store them in one storage case, and to arrange the heating bag only under the cooked rice storage part.

It is a perspective view of the lunch box with a heating function concerning a 1st embodiment of the present invention. (A), (B) is a perspective view of the heat generation trigger member of the lunch box with the same heating function, and (C) is an explanatory view of the heat generation trigger member housed in the trigger housing portion. It is a perspective view of the lunch box with a heating function concerning a 2nd embodiment of the present invention. It is a perspective view of the lunch box with a heating function concerning a 3rd embodiment of the present invention.

Explanation of symbols

10: Lunch box with heating function, 11: Lunch container, 12: Storage case, 13: Lid, 14: Heating bag, 15: Heat generation trigger member, 16: Trigger storage part, 17: Notch, 18: Cooked rice storage part, 19: Side dish storage section, 20, 21, 22: Side dish storage section, 23: Peripheral wall section, 24: Bottom protection section, 25: Mounting table, 26: Space section, 27, 27a: Projection section, 28: Top plate member, 29: Side wall member, 30: Overhang part, 31: Gutter part, 32: Latch part, 33: Lunch box with heating function, 34: Heating bag, 35: Storage case, 36: Peripheral wall part, 37: Bottom protection part, 38: Notch, 39: Lunch box with heating function, 40: Lunch container, 41: Cooked rice storage part, 42: Side dish storage part, 43: Storage case, 44: Heating bag, 45: Notch, 46, 47, 48 50: Side dish storage compartment 51: Perimeter wall , 52: bottom protective portion, 53: protruding portion, 54: lid, 55: top plate member, 56: side wall member

Claims (8)

In a lunch box having a lunch box provided with an opening at the top, a storage case in which the lunch box is stored, and a lid of the lunch box or the storage case,
A heating bag having an upper portion in contact with a bottom portion of the lunch box and having a sodium acetate aqueous solution sealed therein is disposed under the lunch box disposed in the storage case, and a side portion of the heating bag. Includes a trigger accommodating portion that is communicated with the heating bag and accommodates a heat generation trigger member that induces heat generation by impacting the aqueous sodium acetate solution, and the storage case further includes the trigger accommodating portion. A lunch box with a heating function, characterized in that a notch is formed to protrude to the outside of the storage case. The lunch box with a heating function according to claim 1, wherein the lunch container is provided with a cooked rice storage section for storing cooked rice and a side dish storage section for storing a side dish, and the heated bag is the cooked rice to be heated. A lunch box with a heating function, which is arranged only under the storage part. The lunch box with a heating function according to claim 1, wherein the lunch container is provided with a cooked rice storage section for storing cooked rice and a side dish storage section for storing a side dish, and the heated bag is the cooked rice to be heated. A lunch box with a heating function, wherein the lunch box is disposed under a part or all of the storage part and the side dish storage part. The lunch box with a heating function according to claim 1, wherein the lunch container is provided with a rice storage unit for storing cooked rice and a side dish storage unit for storing a side dish separately, and the cooked rice storage unit is provided in the storage case. A lunch box with a heating function, wherein the lunch box is stored, and the heating bag is disposed under the cooked rice storage portion that is to be heated. The lunch box with a heating function according to any one of claims 1 to 4, wherein the upper surface of the heating bag is brought into contact with the shape of the heating object. The lunch box with a heating function according to any one of claims 1 to 5, wherein a plurality of protrusions are dispersedly arranged at the bottom of the heating bag. The lunch box with a heating function according to any one of claims 1 to 5, wherein a heat insulating material is provided on a lower surface of the heating bag in accordance with a lower surface shape of the heating bag. Lunch box with. The lunch box with a heating function according to any one of claims 1 to 7, wherein the exothermic trigger member includes a flange-shaped protruding portion and a flange formed around the protruding portion. The lunch box with a heating function is characterized in that the portion instantaneously changes from a state of projecting to one side to a state of projecting to the other side due to an external load.

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