Cover and storage container

Abstract

The utility model provides a cover piece and a storage container. The cover member includes a body having a plate shape and having a central portion that is a central point of the body or a region surrounding the central point, and a peripheral portion that is a region surrounding the central point of the body. The body includes a first thickness region between the central portion and the peripheral portion and a second thickness region between the central portion and the peripheral portion, where the first thickness region has a thickness less than a thickness of the second thickness region, and where the first thickness region has a thickness less than a thickness of the second thickness region, and where the second thickness region has a thickness less than a thickness of the second thickness region. A linear distance from the center point to the peripheral portion through the first thickness region is smaller than a linear distance from the center point to the peripheral portion through the second thickness region. According to the technical scheme, buckling deformation of the cover part in the injection molding process can be reduced or even completely avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of storage containers, in particular to a cover and a storage container. Background Art

[0002] This section provides background information related to the present invention which does not necessarily constitute prior art.

[0003] With the popularity of pre-prepared dishes in the current catering industry, the demand for storage lunch boxes is increasing. Storage lunch boxes usually include a lunch box body and a cover. The lunch box body has an opening and defines a storage space for accommodating food inside. The cover is plate-shaped and used to cover the opening of the lunch box body. The cover of the storage lunch box is usually made of plastic material. In order to make the cover meet both aesthetic requirements and functional requirements (such as meeting the required strength, heat resistance, etc.), the cover is usually made of a plastic material containing glass fiber. However, a plate-shaped cover made of plastic material, especially a plastic material containing glass fiber, is prone to large warping deformation during the injection molding process, so that the final formed cover cannot be sealed and assembled with the lunch box body. Utility Model Content

[0004] The purpose of the utility model is to solve one or more of the above-mentioned technical problems.

[0005] In particular, the purpose of the utility model is to provide a cover which can meet assembly requirements and has a low degree of warping deformation.

[0006] In one aspect of the utility model, a cover is provided. The cover comprises a body, the body is plate-shaped and has a central portion and a peripheral portion, the central portion is the central point of the body or an area around the central point, the body comprises a first thickness region between the central portion and the peripheral portion and a second thickness region between the central portion and the peripheral portion, wherein the thickness of the first thickness region is smaller than the thickness of the second thickness region, and wherein the straight-line distance from the central point through the first thickness region to the peripheral portion is smaller than the straight-line distance from the central point through the second thickness region to the peripheral portion.

[0007] According to the above technical solution, by reducing the thickness of the first thickness region in which the molten material flows a smaller distance relative to the second thickness region in which the molten material flows a larger distance, the flow resistance caused by the filling resistance encountered by the molten material when flowing through the first thickness region is greater than the flow resistance caused by the filling resistance encountered by the molten material when flowing through the second thickness region. Therefore, the flow rate of the molten material when flowing through the first thickness region can be made smaller than the flow rate of the molten material when flowing through the second thickness region, so that the time for the molten material to pass through the first thickness region and reach the peripheral part is roughly the same as the time for the molten material to pass through the second thickness region and reach the peripheral part. Therefore, the warping deformation of the cover during the injection molding process can be reduced or even completely avoided.

[0008] Optionally, the main body has a rectangular outline, the first thickness area has the center point as a vertex, and a portion of the long side of the rectangle is a triangular area formed by one side or a portion of the triangular area.

[0009] Optionally, the triangular area is symmetrical about an axis passing through the center point.

[0010] Optionally, the angle at the vertex is 60° to 85°.

[0011] Optionally, the thickness of the first thickness region is 65% to 75% of the thickness of the second thickness region.

[0012] Optionally, the body further comprises a smooth transition portion between the first thickness region and the second thickness region, so as to avoid the formation of a sharp step portion between the first thickness region and the second thickness region due to a sudden change in thickness, and to facilitate cleaning of the cover.

[0013] Optionally, the cover further comprises: a sealing member; and a first protrusion, the first protrusion protruding from an inner surface of a peripheral portion of the body in a direction transverse to the body, the first protrusion supporting the sealing member.

[0014] Optionally, the cover further includes a second protrusion protruding from a side surface of a peripheral portion of the body in a direction parallel to the body, and the sealing member surrounds the first protrusion and abuts against an inner surface of the second protrusion.

[0015] Optionally, the central part is an area around the central point, and the body includes a pressure valve, which is arranged in the central part. Providing the pressure valve can facilitate opening the cover when the cover covers the opening of the container body and seals the accommodating space through the sealing member.

[0016] In another embodiment of the present invention, a storage container is provided, comprising: a container body having an opening and defining a storage space therein, wherein the storage space can communicate with the outside through the opening; and a cover member, wherein the cover member is used to cover the opening, wherein the cover member is any of the above-mentioned covers.

[0017] The storage container according to the technical solution of the utility model has any of the above-mentioned covers, and therefore also has the technical effects described above for the covers. For the sake of brevity, no further description is given here. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and other features and characteristics of the present invention will become more apparent from the following detailed description with reference to the accompanying drawings, which are only provided as examples and are not necessarily drawn to scale. The same reference numerals are used in the accompanying drawings to indicate the same components, in which:

[0019] Figure 1 A three-dimensional schematic diagram of a storage container according to an embodiment of the utility model is shown, wherein the cover of the storage container does not cover the container body;

[0020] Figure 2 A three-dimensional schematic diagram of a storage container according to an embodiment of the utility model is shown, wherein a cover of the storage container covers the container body;

[0021] Figure 3 A schematic top view of a storage container according to an embodiment of the utility model is shown;

[0022] Figure 4 Shown along Figure 3 The cross-sectional view taken along the AA line in FIG.

[0023] Figure 5 A perspective view showing a cover of a storage container according to an embodiment of the present invention from a top view;

[0024] Figure 6 A bottom-view perspective view of a cover of a storage container according to an embodiment of the present invention is shown;

[0025] Figure 7 A bottom view schematically shows a cover of a storage container according to an embodiment of the utility model;

[0026] Figure 8 Shown along Figure 7 The cross-sectional view taken along line BB in FIG.

[0027] Fig. 9A schematic diagram showing the degree of warping deformation of a cover of a storage container according to an embodiment of the present utility model;

[0028] Fig.10 The cover member of the comparative embodiment is shown. Figure 8 The cross-sectional view corresponding to the cross-sectional view in ;

[0029] Fig.11 A schematic diagram showing the degree of warping deformation of the cover member according to the comparative embodiment. DETAILED DESCRIPTION

[0030] The preferred embodiments of the present invention will now be described in detail in conjunction with the accompanying drawings. The following description is merely exemplary in nature and is not intended to limit the present invention and its application or use.

[0031] The utility model provides a cover and a storage container comprising the cover. The storage container can be used to store articles such as food. For example, the storage container can be a lunch box. Figure 1 and Figure 2 A three-dimensional schematic diagram of a storage container 1 according to an embodiment of the utility model is shown. Figure 3 A schematic top view of a storage container 1 according to an embodiment of the present utility model is shown. Figure 4 Shown along Figure 3 The cross-sectional view taken along the AA line in FIG. Figures 1 to 4 The storage container 1 provided by the utility model is described as a whole.

[0032] like Figure 1 and Figure 2 As shown, the storage container 1 includes a container body 100 and a cover 200. The container body 100 can be made of any suitable material such as glass, plastic, etc. The container body 100 has an opening 110 and defines a receiving space 120 for receiving articles inside. The receiving space 120 can be communicated with the outside through the opening 110, so that the articles to be stored can be placed in the receiving space 120 through the opening 110. The cover 200 can be made of a plastic material. In particular, the cover 200 can be made of a plastic material containing glass fiber to meet the strength and heat resistance requirements of the cover 200. The cover 200 is used to cover the opening 110 of the container body 100.

[0033] like Figure 1 , Figure 3 and Figure 4As shown, a sealing member 300, such as an annular sealing ring, may be further provided between the container body 100 and the cover 200 to seal the accommodation space 120 when the cover 200 covers the opening 110 of the container body 100. The sealing member 300 may be installed on the cover 200 or on the container body 100. Specifically, in one embodiment of the utility model, the container body 100 is formed with a boss 130 at the opening 110, and the sealing member 300 is provided on the cover 200 (this will be described in detail below). When the cover 200 covers the opening 110 of the container body 100, the sealing member 300 abuts against the boss 130, thereby sealing the accommodation space 120.

[0034] Next, we will combine Figures 5 to 11 The cover 200 of the storage container 1 is described in detail. Figure 5 A three-dimensional view showing a cover 200 of a storage container 1 according to an embodiment of the present invention from a top view; Figure 6 A bottom-view perspective view of a cover 200 of a storage container 1 according to an embodiment of the present invention is shown; Figure 7 A bottom view schematically shows a cover 200 of a storage container 1 according to an embodiment of the present utility model; Figure 8 Shown along Figure 7 The cross-sectional view taken along line BB in FIG. Fig. 9 A schematic diagram showing the degree of warping deformation of the cover 200 of the storage container 1 according to one embodiment of the present utility model; Fig.10 The cover 200 ′ is shown as a comparative embodiment. Figure 8 The cross-sectional view corresponding to the cross-sectional view in ; Fig.11 A schematic diagram showing the degree of warping deformation of a cover member 200 ′ according to a comparative embodiment.

[0035] like Figures 5 to 7 As shown, the cover 200 includes a plate-shaped body 210. The size of the body 210 in one direction (thickness direction) is significantly smaller than the size in the other two directions (length direction and width direction). The body 210 has a rectangular outline. It can be understood that the "rectangle" referred to herein includes a roughly rectangular shape such as a rounded rectangle. The body 210 includes a central portion 211 and a peripheral portion 212. The central portion 211 can be the center point O of the body 210, or it can be an area around the center point O of the body 210, in which components such as a pressure valve can be set. For example, the pressure valve can be set at the position shown by the reference numeral 220. The provision of a pressure valve can facilitate the opening of the cover 200 when the cover 200 covers the opening 110 of the container body 100 and the accommodating space 120 is sealed by the seal 300.

[0036] like Figures 6 to 8 As shown, according to the concept of the present invention, the body 210 further includes a first thickness region 213 between the central portion 211 and the peripheral portion 212 and a second thickness region 214 between the central portion 211 and the peripheral portion 212. Since the first thickness region 213 is located between the central portion 211 and the peripheral portion 212 of the body 210, a portion of the peripheral portion 212 of the body 210 constitutes a boundary of the first thickness region 213. Similarly, since the second thickness region 214 is located between the central portion 211 and the peripheral portion 212 of the body 210, another portion of the peripheral portion 212 of the body 210 constitutes a boundary of the second thickness region 214. The thickness d1 of the first thickness region 213 is less than the thickness d2 of the second thickness region 214. For example, the thickness d1 of the first thickness region 213 may be 65% to 75% of the thickness d2 of the second thickness region 214. Preferably, the body 210 further includes a smooth transition portion 215 between the first thickness region 213 and the second thickness region 214, thereby avoiding the formation of a sharp step portion due to a sudden change in thickness between the first thickness region 213 and the second thickness region 214, so as to facilitate cleaning. In particular, when the cover 200 is used in a storage container 1 such as a lunch box, the smooth transition portion 215 can avoid the problem of incomplete cleaning such as oil stains.

[0037] The first thickness region 213 and the second thickness region 214 are defined by the straight-line distances from the center point O of the body 210 through the first thickness region 213 and the second thickness region 214 to the corresponding peripheral portion 212. Specifically, the first thickness region 213 and the second thickness region 214 are defined such that: the straight-line distance L1 from the center point O of the body 210 through the first thickness region 213 to the peripheral portion 212 (as a portion of a boundary of the first thickness region 213) is less than the straight-line distance L2 from the center point O of the body 210 through the second thickness region 214 to the peripheral portion 212 (as a portion of a boundary of the second thickness region 214). Figure 6 and Figure 7 As shown, there are a plurality of straight-line distances ( Figure 7 Similarly, there are also a plurality of straight line distances ( L1 ) from the center point O of the body 210 through the second thickness region 214 to the peripheral portion 212 of the body 210 . Figure 7Only one of the straight-line distances L2 is schematically shown in the figure. Among them, each of the multiple straight-line distances (e.g., L1) from the center point O of the body 210 through the first thickness region 213 to the peripheral portion 212 of the body 210 is smaller than each of the multiple straight-line distances (e.g., L2) from the center point O of the body 210 through the second thickness region 214 to the peripheral portion 212 of the body 210. In other words, the straight-line distance (e.g., L1) from the center point O of the body 210 through the first thickness region 213 to any point on the peripheral portion 212 of the body 210 located at the first thickness region 213 is smaller than the straight-line distance (e.g., L2) from the center point O of the body 210 through the second thickness region 214 to any point on the peripheral portion 212 of the body 210 located at the second thickness region 214.

[0038] The inventors have found that: when the cover 200 '(such as Fig.10 When the body 210' of the comparative embodiment (shown in ) is not provided with the first thickness region and the second thickness region of different thicknesses but has a uniform thickness, during the injection molding process of the cover 200', the flow speed of the molten material in each direction from the center point of the body 210' toward the peripheral portion of the body 210' is almost the same. Since the distance between the center point of the body 210' and the peripheral portion varies, the molten material first reaches the peripheral portion close to the center point of the body 210' (for example, the long side of the rectangular body), and later reaches the peripheral portion far from the center point of the body 210' (for example, the short side of the rectangular body), thereby causing warping deformation. As shown Fig.10 and 11 As shown, when the body 210' of the cover 200' has a uniform thickness, the warping deformation of the cover 200' is particularly large, so that the cover 200' cannot even be assembled to the Figure 1 The opening 110 of the container body 100 shown in the figure cannot guarantee the sealing of the containing space 120 .

[0039] In the present invention, as described above, the straight-line distance (e.g., L1) from the center point O of the body 210 through the first thickness region 213 to any point on the peripheral portion 212 of the body 210 located at the first thickness region 213 is shorter than the straight-line distance (e.g., L2) from the center point O of the body 210 through the second thickness region 214 to any point on the peripheral portion 212 of the body 210 located at the second thickness region 214, and therefore, the flow distance of the molten material in each direction in the first thickness region 213 is shorter than the flow distance in each direction in the second thickness region 214. If the thickness d1 of the first thickness region 213 is equal to the thickness d2 of the second thickness region 214, and the flow velocity of the molten material in the first thickness region 213 is the same as the flow velocity in the second thickness region 214, the time when the molten material passes through the first thickness region 213 to reach the peripheral portion 212 will be earlier than the time when the molten material passes through the second thickness region 214 to reach the peripheral portion 212. This is undesirable. Therefore, in the present invention, by reducing the thickness d1 of the first thickness region 213, the flow resistance of the molten material caused by the filling resistance when flowing through the first thickness region 213 is greater than the flow resistance of the molten material caused by the filling resistance when flowing through the second thickness region 214. Therefore, the flow rate of the molten material when flowing through the first thickness region 213 can be lower than the flow rate of the molten material when flowing through the second thickness region 214, so that the time for the molten material to pass through the first thickness region 213 and reach the peripheral portion 212 is roughly the same as the time for the molten material to pass through the second thickness region 214 and reach the peripheral portion 212. Therefore, the warping deformation of the cover 200 during the injection molding process can be reduced or even completely avoided. Figure 8 and Fig. 9 As shown, when the body 210 of the cover 200 has the first thickness region 213 and the second thickness region 214 with different thicknesses, there is almost no warping deformation of the cover 200. Therefore, the cover 200 can be assembled to the opening 110 of the container body 100 as expected and can meet the requirement of sealing flatness lower than 0.4 mm, thereby ensuring the sealing effect and reducing the risk of sealing failure caused by warping deformation of the cover 200.

[0040] There may be a plurality of first thickness regions 213 and second thickness regions 214. The specific number and distribution of the first thickness regions 213 and second thickness regions 214 may be determined according to the profile of the body 210 of the cover 200. For example, in one embodiment of the present invention, Figure 6 and Figure 7As shown, the body 210 has a substantially rectangular outline of a rounded rectangle, and the first thickness region 213 is a triangular region formed by roughly taking the center point O of the body 210 as the vertex and a part of the long side of the rectangle as one side. When the central part 211 of the body 210 is the center point O, the first thickness region 213 extends from the center point O of the body 210 to the peripheral part 212, and at this time, the first thickness region 213 is the entire triangular region. When the central part 211 of the body 210 is a region around the center point O, the first thickness region 213 is a part of the above-mentioned triangular region. Preferably, the triangular region is symmetrical about the axis passing through the center point O. That is, the triangular region is an isosceles triangle region. Preferably, the angle α of the triangular region at the vertex is 60° to 85°. There are two first thickness regions 213 and two second thickness regions 214, and the two first thickness regions 213 are symmetrically arranged about the central part 211 of the body 210, and the two second thickness regions 214 are symmetrically arranged about the central part 211 of the body 210.

[0041] Return to reference Figure 1 , Figure 3 and Figure 4 In order to ensure the sealing effect of the receiving space 120 when the cover 200 covers the opening 110 of the container body 100, as described above, a sealing member 300 is further provided between the container body 100 and the cover 200. In order to install the sealing member 300 on the cover 200, as described above, Figures 6 to 8 As shown, the cover 200 further includes a first flange 230, which protrudes from the inner surface of the peripheral portion 212 of the body 210 in a direction transverse to the body 212. Specifically, in one embodiment of the present invention, as shown in FIG. Figure 8 As shown, the first flange 230 protrudes from the inner surface of the peripheral portion 212 of the body 210 in a direction perpendicular to the body 212. The first flange 230 supports the sealing member 300. It should be noted that the "inner surface" referred to herein is relative to when the cover 200 covers the opening 110 of the container body 100. Specifically, the "inner surface" of the body 210 refers to the surface of the body 210 facing the accommodating space 120 of the container body 100 when the cover 200 covers the opening 110 of the container body 100.

[0042] The sealing member 300 may be supported on the first flange 230 in any suitable manner. Figures 5 to 8 As shown, the cover 200 further includes a second protrusion 240, which protrudes from the side surface of the peripheral portion 212 of the body 210 in a direction parallel to the body 210. The second protrusion 240 may be flush with the body 210 or may not be flush. Figure 4As shown, the sealing member 300 surrounds the first flange 230 of the cover member 200. That is, the sealing member 300 is supported on the radially outer side of the first flange 230. In addition, the sealing member 300 also abuts against the inner surface of the second flange 240. The "inner surface" of the second flange 240 refers to the surface of the second flange 210 facing the container body 100 when the cover member 200 covers the opening 110 of the container body 100. As described above, when the cover member 200 covers the opening 110 of the container body 100, the sealing member 300 also abuts against the boss 130 of the container body 100. In this way, the sealing member 300 is squeezed between the boss 130 of the container body 100, the first flange 230 and the second flange 240 of the cover member 200, thereby sealing the accommodating space 120.

[0043] In summary, in the present invention, by reducing the thickness of the first thickness region in which the molten material flows a smaller distance relative to the second thickness region in which the molten material flows a larger distance, the flow resistance caused by the filling resistance encountered by the molten material when flowing through the first thickness region is greater than the flow resistance caused by the filling resistance encountered by the molten material when flowing through the second thickness region. Therefore, the flow rate of the molten material when flowing through the first thickness region can be less than the flow rate of the molten material when flowing through the second thickness region, so that the time for the molten material to reach the peripheral portion through the first thickness region is roughly the same as the time for the molten material to reach the peripheral portion through the second thickness region. Therefore, the warping deformation of the cover during the injection molding process can be reduced or even completely avoided. In addition, by providing a smooth transition portion between the first thickness region and the second thickness region, a sharp step portion due to a sudden change in thickness can be avoided between the first thickness region and the second thickness region, which can facilitate the cleaning of the cover.

[0044] It should be noted that, in the above-mentioned embodiment, the cover 200 of the present invention is described in detail by taking the body 210 having a rectangular outline as an example. However, in other embodiments not shown in the present invention, the body of the cover may also have outlines of other shapes. For example, in other embodiments not shown in the present invention, the body may have the outline of a square (including a roughly square such as a rounded square). When the body has the outline of a square, since the distance distribution from the center point of the square to each side length is the same, and the straight-line distance from the center point of the square to the peripheral portion of the square is relatively large at the diagonal area of ​​the square, the first thickness area with a smaller thickness may be distributed along the diagonal of the square. Thus, the body may have four first thickness areas and four second thickness areas distributed along the diagonal of the square.

[0045] It should be understood that various different embodiments can be further designed by combining or modifying different embodiments and various technical features in different ways.

[0046] The above describes the cover and storage container according to the preferred embodiment of the utility model in combination with the specific embodiment. It can be understood that the above description is only exemplary and not restrictive. Without departing from the scope of the utility model, those skilled in the art can think of various variations and modifications with reference to the above description. These variations and modifications are also included in the protection scope of the utility model.

Claims

1. A cover, characterized in that: The cover comprises a body, which is plate-shaped and has a central portion and a peripheral portion, the central portion being the central point of the body or an area surrounding the central point, the body comprising a first thickness area between the central portion and the peripheral portion and a second thickness area between the central portion and the peripheral portion, wherein the thickness of the first thickness area is smaller than the thickness of the second thickness area, and wherein a straight-line distance from the central point through the first thickness area to the peripheral portion is smaller than a straight-line distance from the central point through the second thickness area to the peripheral portion.

2. The cover according to claim 1, characterized in that The body has a rectangular outline, the first thickness area has the center point as a vertex, and a portion of a long side of the rectangle is a triangular area formed by one side or a portion of the triangular area.

3. The cover according to claim 2, characterized in that The triangular area is symmetrical about an axis passing through the center point.

4. The cover according to claim 3, characterized in that The angle at the vertex is 60° to 85°.

5. The cover according to claim 1, characterized in that The thickness of the first thickness region is 65% to 75% of the thickness of the second thickness region.

6. The cover according to claim 1, characterized in that The body also includes a smooth transition between the first thickness region and the second thickness region.

7. The cover according to claim 1, characterized in that The cover also includes: seals; and A first protrusion protrudes from an inner surface of a peripheral portion of the body in a direction transverse to the body, the first protrusion supporting the seal.

8. The cover according to claim 7, characterized in that The cover member further includes a second protrusion protruding from a side surface of a peripheral portion of the body in a direction parallel to the body, and the seal member surrounds the first protrusion and abuts against an inner surface of the second protrusion.

9. The cover according to claim 1, characterized in that The central portion is a region surrounding the center point, and the body includes a pressure valve disposed in the central portion.

10. A storage container, characterized in that: The storage container comprises: a container body having an opening and defining a receiving space therein, wherein the receiving space can communicate with the outside through the opening; and A cover member, the cover member being used to cover the opening, wherein the cover member is the cover member according to any one of claims 1 to 9.

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