Vacuum container

Abstract

To provide a vacuum container having a bottom lid, with a vacuum hole provided so as not to impair the function as a vacuum container. 【Solution means】It includes an outer wall member 10 and an inner wall member 11, a cylindrical main body portion in which a vacuum space is formed between the outer wall member 10 and the inner wall member 11, an openable / closable or detachable upper lid provided at the upper part of the cylindrical main body portion, an openable / closable or detachable bottom lid 3 provided at the lower part of the cylindrical main body portion, a vacuum hole 101 formed on the outer surface of the outer wall member 10, and a cap 4 for closing the hole 101, and is characterized by this.

Description

Technical Field

[0001] The present invention relates to a vacuum container having heat retention and cold retention properties.

Background Art

[0002] As an example of such a vacuum container, there is a beverage container disclosed in Patent Document 1 below. Such a beverage container includes a cylindrical main body portion composed of an outer wall member and an inner wall member. This beverage container includes an openable / closable upper lid at the upper part of the cylindrical main body portion and a detachable bottom lid. The reason for making the bottom lid detachable is to facilitate the cleaning of the inside of the beverage container.

[0003] And, the cylindrical main body portion includes an outer wall member formed in a cylindrical shape and an inner wall member formed in a cylindrical shape. In order to form a vacuum space between the outer wall member and the inner wall member, a vacuum drawing hole (exhaust hole) is required. Generally, the vacuum drawing hole is provided at the bottom of the cylindrical main body portion. The reason for providing it at the bottom is to ensure the design property so as not to be shown on the appearance.

[0004] However, in order to configure the bottom lid to be openable / closable or detachable, an opening is formed at the bottom of the cylindrical main body portion, so that a vacuum drawing hole cannot be formed at the bottom of the beverage container.

[0005] On the other hand, in the beverage container (metal vacuum double bottle) in Patent Document 2 below, a horizontal portion is provided at the shoulder of the outer cylinder (corresponding to the upper part of the cylindrical main body portion), and an exhaust port communicating with the space between the inner and outer cylinders is drilled in this horizontal portion. After evacuating the space between the inner and outer cylinders through this exhaust port, the exhaust port is sealed.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0007] However, it is necessary to provide an upper lid that can be opened, closed, or detached at the upper part of the cylindrical main body of the beverage container, and it is also necessary to maintain an appropriate function as a drinking mouth. Therefore, there are significant restrictions on forming the vacuum hole, and a situation may occur where the function as a drinking mouth is inhibited or degraded.

[0008] The present invention has been made in view of the above circumstances, and its problem is to provide a vacuum container having a bottom lid, in which a vacuum hole is provided so as not to impair the function of the vacuum container.

Means for Solving the Problems

[0009] To solve the above problems, the vacuum container according to the present invention includes a cylindrical main body portion having an outer wall member and an inner wall member, and a vacuum space is formed between these outer wall member and inner wall member, an upper lid that can be opened, closed, or detached provided at the upper part of the cylindrical main body portion, a bottom lid that can be opened, closed, or detached provided at the lower part of the cylindrical main body portion, a vacuum hole formed on the outer surface of the outer wall member, and a closing member for closing the hole, and is characterized by this.

[0010] The operation and effects of the vacuum container with such a configuration will be described. The cylindrical main body portion constituting this vacuum container is composed of an outer wall member and an inner wall member. In order to form a vacuum space between the outer wall member and the inner wall member, a vacuum hole is formed on the outer surface of the outer wall member. An upper lid is provided at the upper part of the cylindrical main body portion, and a bottom lid is provided at the lower part. However, since the vacuum hole is formed on the outer surface, it does not affect the arrangement configuration of the upper lid and the bottom lid at all. A closing member for closing the hole is provided in the vacuum hole, and the design property of the appearance can also be maintained. As a result, it is possible to provide a vacuum container provided with a vacuum hole so that even a vacuum container having a bottom lid does not impair the function as a vacuum container.

[0011] The closing member according to the present invention is preferably in a flat plate shape and flush or substantially flush with the outer surface of the outer wall member.

[0012] The vacuum hole according to the present invention is preferably provided at the lower part of the outer wall member.

[0013] The vacuum hole according to the present invention is preferably provided at the upper part of the outer wall member.

[0014] In the present invention, a hemispherical recess is preferably formed on the outer surface of the outer wall member, and the vacuum hole is preferably formed on the bottom surface of the recess.

[0015] In the present invention, a mounting portion for mounting the outer wall member is preferably formed on the outer periphery of the recess.

Brief Description of the Drawings

[0016]

Figure 1

Figure 2

Figure 3

Figure 4

Best Mode for Carrying Out the Invention

[0017] A preferred embodiment of a beverage container, which is an example of a vacuum container according to the present invention, will be described with reference to the drawings. FIG. 1 is an external perspective view of a beverage container (mug bottle) according to the present embodiment. FIG. 2 is a central longitudinal sectional view of the beverage container according to the present embodiment. FIG. 3 is a partially enlarged view thereof. FIG. 4 is an exploded perspective view of the main members of the beverage container.

[0018] As shown in FIG. 1, the beverage container A includes a cylindrical main body portion 1, an upper lid 2 provided on the upper portion of the cylindrical main body portion 1, and a bottom lid 3 provided on the lower portion of the cylindrical main body portion 1. The appearance of the cylindrical main body portion 1 is formed in a cylindrical shape, but is not limited to a specific shape. The cylindrical main body portion 1 is composed of an outer wall member 10 and an inner wall member 11, and the space formed therebetween becomes a vacuum space S and is configured to have heat retention and cold retention properties. The upper ends of the outer wall member 10 and the inner wall member 11 are joined by a method such as welding, and the lower ends of the outer wall member 10 and the inner wall member 11 are also joined by a method such as welding to form a sealed space inside. The outer wall member 10 and the inner wall member 11 are preferably formed of an appropriate metal such as stainless steel.

[0019] A female screw 20 is formed inside the upper lid 2 and is screwed with a male screw 10a formed on the upper portion of the outer wall member 10. Therefore, the upper lid 2 is detachably attached to the cylindrical main body portion 1. A plug portion 21 and a packing 22 are provided inside the upper lid 2 to ensure airtightness.

[0020] At the upper part of the inner wall member 11, a drinking mouth member 5 is detachably provided. A female thread 11a is formed at the upper part of the inner wall member 11, and a male thread 51 is formed on the outer surface of the drinking mouth member 5. Thereby, the inner wall member 11 and the drinking mouth member 5 are detachably attached by screwing. A packing is provided between the inner wall member 11 and the drinking mouth member 5. A packing 22 is also positioned between the plug portion 21 of the upper lid 2 and the drinking mouth member 5 to maintain airtightness. An opening 50 is formed in a part of the drinking mouth member 5. When drinking a beverage, the upper lid 2 can be removed and the drink can be consumed through the opening 50. Note that the plug portion 21 is completely fixed to the upper lid 2 so as not to come off.

[0021] Although the upper lid 2 has a structure that can be detachably attached, in the present invention, the upper lid 2 may be configured to be an openable and closable type by a hinge.

[0022] As shown in the partially enlarged view of the longitudinal sectional view of FIG. 3, inside the bottom lid 3, a plug portion 31 is attached in a fixed state. A male thread 30 is formed on the outer periphery of the plug portion 31. A female thread 11b is formed at the lower part of the inner wall member 11 and is screwed with the male thread 30 of the plug portion 31. Thereby, the bottom lid 3 is detachably attached to the cylindrical main body portion 1. A packing 32 is provided on the plug portion 31 and contacts the inner surface of the inner wall member 11. Thereby, airtightness is maintained.

[0023] In the case of a beverage container without a bottom lid 3, it is not easy to clean and dry the bottom inside the container. However, when a detachable bottom lid is provided, it can be evenly cleaned and dried from the upper part to the lower part inside the container. Note that, regarding the configuration of the bottom lid, it may be configured to be an openable and closable type by a hinge instead of being detachable.

[0024] Next, the vacuum holes will be described. As shown in Fig. 3, a shape for vacuuming is formed at the lower part of the outer wall member 10. The lower part of the outer wall member 10 is a position close to the bottom cover 3. When the cylindrical main body 1 is held by hand, a position that cannot be touched by hand is preferable. On the outer wall member 10, a hemispherical recess 100, a vacuum hole 101, and a ring-shaped recess 102 (corresponding to the placement part) are formed. Such a shape can be formed by pressing from the outer surface of the outer wall member 10.

[0025] The hole 101 is formed at the deepest position of the recess 100. The size and shape of the hole 101 can be determined as appropriate. A ring-shaped recess 102 is formed around the hemispherical recess 100. The depth of the ring-shaped recess 102 is the same as or approximately the same as that of the cap 4. The specific shape of the hemispherical recess 100 can be determined as appropriate. It does not have to be a geometrically precise hemisphere. The depth of the hemispherical recess 100 can also be determined as appropriate in consideration of the vacuuming process.

[0026] The cap 4 (corresponding to the closing member) is a circular flat plate made of aluminum, but it is not limited to such a shape and material. It may be elliptical, square, triangular, etc. The material of the cap 4 can also be determined as appropriate, such as made of a metal other than aluminum or made of resin. A material having a certain degree of shape maintenance and flexibility is preferable. Note that the cap 4 is flat, but it does not have to be a perfect flat plate. Since the cylindrical main body 1 is cylindrical, when the cap 4 is attached, it preferably takes a shape along the cylindrical shape.

[0027] The cap 4 is arranged in the ring-shaped recess 102. It is fixed in the ring-shaped recess 102 by a method such as adhesion so that the sealing degree and the vacuum degree can be maintained.

[0028] The thickness of the cap 4 is the same as or approximately the same as the depth of the annular recess 102. Accordingly, the outer surface of the outer wall member 10 and the surface of the cap are flush or approximately flush (for example, ±1 mm with respect to the outer surface). Preferably, the depth of the annular recess is set to be greater than the thickness of the cap 4. Thereby, unnecessary irregularities on the outer surface of the cylindrical main body 1 can be eliminated or reduced to a negligible level. Therefore, when the beverage container is held by hand for use, it can have a feel that does not catch on the hand.

[0029] With such a configuration, the vacuum hole 101 can be hidden. By providing the bottom lid 3, a vacuum hole is not formed at the bottom, but the vacuum hole 101 can be formed while maintaining the appearance quality. Further, by applying decorative printing to the surface of the cap 4, a design accent can also be provided.

[0030] <Another Embodiment> The height of the upper lid 2 is set to be higher than the height of the bottom lid 3, but the dimensional relationship can be set as appropriate. In the present embodiment, the outer diameter of the cylindrical main body 1 is set to be the same as or approximately the same as the outer diameters of the upper lid 2 and the bottom lid 3, but such a dimensional relationship can also be set as appropriate.

[0031] In the present embodiment, the vacuum hole 101 is provided in the lower part of the outer wall member 10, but in the present invention, it is not limited to the lower part and may be provided in the upper part or the central part.

[0032] In the present embodiment, an annular recess is cited as an example of the placement portion, but it is not limited thereto. A recess that is not annular may be formed. The outer shape of the recess can adopt various shapes such as circular, elliptical, and rectangular.

[0033] In this embodiment, a beverage container is described as an example of the vacuum container, but the present invention is not limited thereto. The configuration of the present invention can also be applied to lunch boxes, bowls, and storage containers in addition to beverage containers. Therefore, what is contained inside the container is not limited to liquids, and any food and drink, solids, sera and urine used in medical treatment, etc. are also targeted. The shape of the cylindrical main body portion is not limited to a circular horizontal cross-section, and various shapes such as rectangular, square, and elliptical can be adopted.

Explanation of Reference Numerals

[0034] A Beverage container (vacuum container) 1 Cylindrical main body portion 10 Outer wall member 10a Screw 11 Inner wall member 100 Hemispherical recess 101 Vacuum drawing hole 102 Ring-shaped recess 2 Upper lid 3 Bottom lid 4 Cap (closing member)

Claims

1. A cylindrical main body having an outer wall member and an inner wall member, with a vacuum space formed between the outer wall member and the inner wall member, An openable / closable or detachable upper lid provided on the upper part of the cylindrical main body, An openable / closable or detachable bottom lid provided on the lower part of the cylindrical main body, A vacuum suction hole formed on the outer surface of the outer wall member, A closing member for closing the hole, characterized in that it is a vacuum container.

2. The vacuum container according to claim 1 or 2, wherein the closing member is flat and flush or substantially flush with the outer surface of the outer wall member.

3. The vacuum container according to claim 1 or 2, wherein the vacuum suction hole is provided at the lower part of the outer wall member.

4. The vacuum container according to claim 1 or 2, wherein the vacuum suction hole is provided at the upper part of the outer wall member.

5. The vacuum container according to claim 1 or 2, wherein a concave portion is formed on the outer surface of the outer wall member, and the vacuum suction hole is formed on the bottom surface of the concave portion.

6. The vacuum container according to claim 5, wherein a placement portion for placing the outer wall member is formed on the outer periphery of the concave portion.

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