• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Lunchbox (1) comprising a container (2) for food (C) and a closure lid (3) for closing the container (2) in a leak-tight manner, the closure lid (3) comprising electrical heating means (4). The closure lid (3) comprises switching means (5) which are closed to allow the passage of an electric current toward the heating means (4) when the food (C) in the container (2) is supported on the closure lid (3).
    公开号:EP3704991A1
    申请号:EP19382167.5
    申请日:2019-03-05
    公开日:2020-09-09
    发明作者:Francisco Javier Aranceta Aguirre；Juan Antonio GARATE ALDAZ；Xabier Gorritxategi Retolaza
    申请人:Agrupacion Cluster De Electrodomesticos De Euskadi AIE；Cs Centro Stirling SCoop；Siliconas Silam SA；
    IPC主号:H05B3-00
    专利说明:
    [0001] The present invention relates to lunchboxes comprising a container for food and a closure lid for closing the container in a leak-tight manner. PRIOR ART
    [0002] Lunchboxes comprising a container for food and a closure lid for closing the container in a leak-tight manner are known. Lunchboxes incorporating heating means for heating the food before consuming it are also known.
    [0003] US2017/0137205A1 describes a lunchbox comprising a container for food and a closure lid for closing the container in a leak-tight manner. The lunchbox comprises electrical heating means in the container and may also comprise electrical heating means in the closure lid. DISCLOSURE OF THE INVENTION
    [0004] The object of the invention is to provide a lunchbox as defined in the claims.
    [0005] The lunchbox of the invention comprises a container for food and a closure lid for closing the container in a leak-tight manner. The closure lid comprises electrical heating means and also comprises switching means which are closed to allow the passage of an electric current toward the heating means when the food in the container is supported on the closure lid.
    [0006] The invention provides a new concept of lunchbox in which the user has to turn said lunchbox upside down, supporting it on the closure lid, in order to heat the food included in the lunchbox. In this position, with the food being supported on the closure lid of the lunchbox, the passage of an electric current to the electrical heating means of the closure lid is allowed and heating of said food occurs.
    [0007] These and other advantages and features of the invention will become evident in view of the drawings and detailed description of the invention. DESCRIPTION OF THE DRAWINGS
    [0008] Figure 1 shows a cross-section view of an embodiment of the closure lid of the lunchbox of the invention. Figure 2 shows a cross-section view of the closure lid of Figure 1 closing the container of the lunchbox, with the lunchbox being supported on the container. Figure 3 shows a cross-section view of the lunchbox of Figure 2, with the lunchbox being supported on the closure lid. Figure 4 shows an exploded view of the heating means and the switching means of the closure lid of Figure 1. Figure 5 shows an electrical diagram of the closure lid of Figure 1. DETAILED DISCLOSURE OF THE INVENTION
    [0009] As shown in Figure 2, the lunchbox of the invention comprises a container 2 for food C and a closure lid 3 for closing the container 2 in a leak-tight manner. The closure lid 3 comprises electrical heating means 4. The closure lid 3, shown in Figure 1, comprises switching means 5 which are closed to allow the passage of an electric current toward the heating means 4 when the food C in the container 2 is supported on the closure lid 3, as shown in Figure 3.
    [0010] In a preferred embodiment, the switching means 5 are configured for being closed as a result of the weight of the food C in the container 2 on the closure lid 3, like in the case of the embodiment shown in the drawings. The switching means 5 preferably comprise at least two opposite conductive elements 5a and 5b which by default are separated from one another and which are configured to allow the passage of the electric current toward the heating means 4 when the weight of the food C in the container 2 acts on one of said conductive elements 5a, moving it until contacting the other conductive element 5b.
    [0011] In a preferred embodiment, as shown in Figure 2 the switching means 5 comprise two flexible sheets 6a and 6b arranged longitudinally in the closure lid 3, the flexible sheet 6a comprising the conductive element 5a and the flexible sheet 6b comprising the conductive element 5b. The conductive elements 5a and 5b are preferably conducting surfaces arranged on opposite faces of the flexible sheets 6a and 6b.
    [0012] The flexible sheets 6a and 6b are separated by stops 16 arranged in this embodiment in the flexible sheet 6b. When the lunchbox 1 is placed upside down and the food C rests on the closure lid 3, the flexible sheet 6a bends as a result of the weight of the food C and the conductive element 5a contacts the conductive element 5b, as seen in Figure 3. When the lunchbox 1 is placed back in its normal position, the flexible sheet 6a is again separated from the flexible sheet 6b.
    [0013] The heating means 4 preferably comprise a heating resistor 8 which is in contact with one of the flexible sheets 6a or 6b of the switching means 5. In a preferred embodiment, the heating resistor 8 is screen-printed on one of the flexible sheets 6a or 6b of the switching means 5, as shown in Figure 4, preferably on the face of the flexible sheet 6a which is opposite the inside of the container 2.
    [0014] In a preferred embodiment, the closure lid 3 comprises a rigid casing 13, preferably made of plastic. The switching means 5 are arranged on an inner face of said rigid casing 13, said switching means 5 preferably being covered with a layer 14 of food-grade silicone. In a preferred embodiment, the switching means 5 are embedded in the layer 14 of food-grade silicone.
    [0015] In a preferred embodiment, the lunchbox 1 also comprises safety switching means 10 arranged in series with the switching means 5 of the closure lid 3, the safety switching means 10 being configured to allow the passage of an electric current when the lunchbox 1 is closed. Figure 5 shows the electric circuit corresponding to this embodiment. In this way, the heating means 4 are only powered if the lunchbox 1 is closed, preventing said heating means 4 from heating up when the closure lid 3 is separated from the container 2.
    [0016] The safety switching means 10 preferably comprise at least two opposite conductive elements 10a and 10b which by default are separated from one another, as shown in Figure 1, and which are configured to allow the passage of an electric current toward the heating means 4 when the container 2 pushes one of said conductive elements 10a upon closing the lunchbox 1, moving said conductive element 10a until contacting the other conductive element 10b, as shown in Figure 2.
    [0017] In a preferred embodiment, the switching means 5 and the safety switching means 10 are embedded in the same layer 14 of food-grade silicone, said layer 14 comprising a perimetral seal 15 for closing the container 2 in a leak-tight manner. Furthermore, in a preferred embodiment the conductive elements 10a and 10b are conducting surfaces arranged on opposite faces of the flexible sheets 6a and 6b, as shown in Figures 1 to 3.
    [0018] The closure lid 3 preferably comprises a connector 9, not shown in Figures 1 to 4, configured for being connected to an external power source, the switching means 5 being arranged between the connector 9 and the heating means 4. In the embodiment shown in the drawings, the switching means 5 and the safety switching means 10 are arranged in series between the connector 9 and the heating means 4, as shown in Figure 5.
    [0019] The invention also relates to a closure lid 3 like the one described which can be used with different conventional containers 2 insofar as the closure lid 3 and the container 2 have the suitable shape and dimensions for them to fit together, such that the container 2 is closed in a leak-tight manner. The closure lid 3 is therefore an accessory which converts conventional containers 2 into containers in which food can be heated.
    权利要求:
    Claims (14)
    [0001] Lunchbox comprising a container (2) for food (C) and a closure lid (3) for closing the container (2) in a leak-tight manner, the closure lid (3) comprising electrical heating means (4), characterized in that the closure lid (3) comprises switching means (5) which are closed to allow the passage of an electric current toward the heating means (4) when the food (C) in the container (2) is supported on the closure lid (3).
    [0002] Lunchbox according to claim 1, wherein the switching means (5) are configured for being closed as a result of the weight of the food (C) in the container (2) on the closure lid (3).
    [0003] Lunchbox according to claim 2, wherein the switching means (5) comprise at least two opposite conductive elements (5a, 5b) which by default are separated from one another and which are configured to allow the passage of the electric current toward the heating means (4) when the weight of the food (C) in the container (2) acts on one of said conductive elements (5a), moving it until contacting the other conductive element (5b).
    [0004] Lunchbox according to claim 3, wherein the switching means (5) comprise two flexible sheets (6a, 6b) arranged longitudinally in the closure lid (3), each flexible sheet (6a, 6b) comprising one of said conductive elements (5a, 5b).
    [0005] Lunchbox according to claim 4, wherein the conductive elements (5a, 5b) are conducting surfaces arranged on opposite faces of the flexible sheets (6a, 6b).
    [0006] Lunchbox according to claim 4 or 5, wherein the heating means (4) comprise a heating resistor (8) which is in contact with one of the flexible sheets (6a, 6b) of the switching means (5).
    [0007] Lunchbox according to claim 6, wherein the heating resistor (8) is screen-printed on one of the flexible sheets (6a, 6b) of the switching means (5).
    [0008] Lunchbox according to any of the preceding claims, wherein the closure lid (3) comprises a rigid casing (13), preferably made of plastic, the switching means (5) being arranged on an inner face of said rigid casing (13), and said switching means (5) being covered with a layer (14) of food-grade silicone.
    [0009] Lunchbox according to claim 8, wherein the switching means (5) are embedded in the layer (14) of food-grade silicone.
    [0010] Lunchbox according to any of the preceding claims, comprising safety switching means (10) arranged in series with the switching means (5) of the closure lid (3), the safety switching means (10) being configured to allow the passage of an electric current when the lunchbox (1) is closed.
    [0011] Lunchbox according to claim 10, wherein the safety switching means (10) comprise at least two opposite conductive elements (10a, 10b) which by default are separated from one another and which are configured to allow the passage of an electric current toward the heating means (4) when the container (2) pushes one of said conductive elements (10a) upon closing the lunchbox (1), moving said conductive element (10a) until contacting the other conductive element (10b).
    [0012] Lunchbox according to claim 10 or 11, wherein the switching means (5) and the safety switching means (10) are embedded in one and the same layer (14) of food-grade silicone, said layer (14) comprising a perimetral seal (15) for closing the container (2) in a leak-tight manner.
    [0013] Lunchbox according to any of the preceding claims, wherein the closure lid (3) comprises a connector (9) configured for being connected to an external power source, the switching means (5) being arranged between the connector (9) and the heating means (4).
    [0014] Closure lid of a lunchbox (1) according to any of the preceding claims.
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    同族专利:
    公开号 | 公开日
    EP3704991B1|2021-03-03|
    WO2020178465A1|2020-09-10|
    DK3704991T3|2021-05-25|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
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    优先权:
    申请号 | 申请日 | 专利标题
    EP19382167.5A|EP3704991B1|2019-03-05|2019-03-05|Lunchbox|DK19382167.5T| DK3704991T3|2019-03-05|2019-03-05|LUNCH BOX|
    EP19382167.5A| EP3704991B1|2019-03-05|2019-03-05|Lunchbox|
    PCT/ES2020/070123| WO2020178465A1|2019-03-05|2020-02-20|Food storage tub|
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