JP3457505B2 - Container lid - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cover for closing a mouth of a container for storing a semi-liquid containing water, a volatile liquid or foodstuffs therein. About. 2. Description of the Related Art Conventionally, cosmetic containers for storing foundations, volatile lotions or lotions containing water and a certain degree of viscosity, and storage containers for storing foodstuffs have been widely used. In order to prevent liquid components such as cosmetics and foodstuffs contained in the container from evaporating due to a temperature difference or an atmospheric pressure difference between the inside and the outside of the container, these containers are closed. The cover body is screwed or fitted, or the container body and the cover body are connected by a hinge, and the container body and the locking member provided at one end of the cover body are engaged with each other. To prevent evaporation to the outside. By the way, in the lids provided in these containers, moisture or the like evaporated inside the containers often adheres to the back surface of the lids to cause dew condensation. Especially in highly airtight containers,
Since the amount of water and the like that evaporates to the outside is small, the amount attached to the lid increases, and the amount of dew condensation increases. [0005] When the dew forms as described above, the dew grows and water droplets are generated on the lid body. When the lid body is removed from the container body, the water droplets become conspicuous or the impression of the product housed inside the container body. Make you worse. Further, the water droplets may spill from the lid and adhere to clothes or the like. On the other hand, in order to prevent the formation of condensation and water droplets, a water-absorbing paper, cloth or nonwoven fabric is adhered to the back side of the lid, and a lid which absorbs moisture evaporated from the contents is attached to these. Used. However, when water-absorbing paper or the like is stuck to the back side of the lid in this manner, the evaporated or volatilized water and the like are immediately absorbed by these water-absorbing bodies,
There is a problem that the liquid component of the contents is continuously absorbed until the inside of the container body reaches the vapor pressure equilibrium. [0008] In addition, there is also a problem that when moisture is absorbed, the surface of the contents stored in the container body dries, giving a user or the like a misunderstanding that the properties may have changed. Next, since cosmetics and the like are often taken out of small containers and used each time, in a long-term use, evaporation of moisture from the contents further increases, and finally the contents cause a change in properties. There is also the problem that there is a possibility. Further, when a container provided with a lid to which these absorbers are attached is left for a long period of time, the absorbers become saturated, and paper and the like are moistened, and there is also a problem that touch such as touch is deteriorated. [0010] Furthermore, when the contents to be stored are food items, sticking paper or the like to the back surface of the lid may cause mold, which is not suitable for long-term storage. If water-absorbing paper or the like is attached to the back surface of the lid, paper and the like must be attached in addition to the production of the container body, which is troublesome, and there is a problem that the cost is increased accordingly. The present invention has been made in view of the above matters. That is, while minimizing the liquid component that evaporates from the contents stored in the container body, preventing the occurrence of dew condensation due to the evaporated liquid component, even if the evaporated liquid component adheres to the back surface of the lid, this liquid component It is an object of the present invention to provide a cover that is not noticeable. It is another technical object of the present invention to provide a cover that does not require labor and cost for manufacturing the cover. [0013] The present invention employs the following means in order to solve the above-mentioned problems. The container lid according to the present invention is a lid that closes a mouth of a container that stores contents therein, and has a plurality of concave and convex portions formed on almost the entire rear surface side of the lid. is there. The irregularities are arranged in the vertical and horizontal directions, and one side of the irregularities is set to 0.5 to 5.0.
mm, and the depth was 0.2 to 3.0 mm. According to the present invention, by arranging a plurality of uneven portions over substantially the entire back surface side of the lid, even if the liquid component of the content stored in the container evaporates and adheres to this lid, the liquid The liquid component penetrates into the concave portion of the lid due to the surface tension due to the component, and the liquid component spreads evenly on the concave and convex portions. As a result, the liquid component is partially concentrated to form dew, and the dew grows to form water droplets. Can be prevented from being formed. Here, the uneven portion means that a ridge is erected in the longitudinal direction and the horizontal direction, the ridge is formed as a convex portion, a portion surrounded by the ridge is formed as a concave portion, And forming a concave and convex portion by making a hole in the surface of the substrate. Further, depending on the size of the container and the amount of the liquid component contained in the contents to be stored, one side of the uneven portion may be 0.5 to 0.5.
It can be arbitrarily set to 5.0 mm and its depth in the range of 0.2 to 3.0 mm. Further, the container using the lid can be used as a cosmetic container for storing cosmetics such as a foundation or a storage container for storing and storing foods.
Next, this container lid can be subjected to sandblasting on the back side of the lid to roughen the surface. Here, the sandblasting is to give fine irregularities to the surface with fine sand particles. By performing the sand blasting in this manner, fine irregularities are generated on the surface, and the liquid component enters the concave groove, thereby increasing the amount of the liquid component attached and preventing the generation of water droplets. Further, the evaporation of liquid components from the contents is reduced by reaching the vapor pressure equilibrium as soon as possible in the space inside the container. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A container lid 1 according to the present embodiment will be described below with reference to FIGS. This container lid 1
As shown in FIG. 1, a plurality of ridges are erected at equal intervals in the vertical and horizontal directions on the back side of a circular lid, and the erected ridges are formed as protrusions 2a and are surrounded by the ridges. The portion is formed as the recess 2b. In addition, the uneven | corrugated part 2 is not limited to the thing in which a ridge is provided, but may provide a several hole in the back surface side of the cover 1 at equal intervals. Next, when a synthetic resin such as polypropylene or polyethylene terephthalate is used as a material, the container lid 1 is formed by melting and injecting the synthetic resin into a predetermined male mold and a female mold having a ridge. It can be manufactured by injection molding. When a metal such as aluminum is used as the material, the metal material can be pressed and manufactured. Then, the container lid 1 according to the present embodiment
The length A of one side of one uneven portion 2 is set to 1.0 mm as shown in FIG. Here, the length A of one side of the uneven portion 2 refers to the length from the center of the convex portion 2a to the center of the adjacent convex portion 2a. The length A is 0.5 to 5.0 m
It can be set arbitrarily within the range of m. For example, a liquid component that evaporates per unit time is obtained in advance from the amount of the liquid component such as moisture contained in the contents to be stored, and when the amount of the evaporating liquid component is large, the length of one side is reduced. By providing the uneven portion 2 continuously and at a high density, dew condensation and water droplets are not generated due to the difference between the surface tension of the convex portion 2a and the liquid component adhering to the concave portion 2b and the surface tension of the liquid component adhering to the concave portion 2b. To do. Further, the length of the contents can be set in consideration of the frequency of use, the storage period, and the like. Furthermore, in the present embodiment, the shape of the concave portion 2b surrounded by the ridge is substantially square, but the shape is not limited to a square, and the length of one side forming one uneven portion 2 is set to 0. By setting each of them differently in the range of 0.5 to 5.0 mm, a rectangular shape can be obtained. Note that the length of one side when the shape of the concave portion 2b is circular indicates the length of the diameter of the circle. Next, as shown in FIG.
Is set to 0.4 mm, and the depth B is also 0.2 to 3.
It can be set arbitrarily within a range of 0 mm. For example, when the amount of the liquid component that evaporates is large, the depth B can be increased to increase the amount of the liquid component that enters the concave portion 2b so that dew condensation and water droplets can be prevented. Furthermore, in a highly airtight cosmetic container or food container, the vapor pressure equilibrium is reached relatively quickly in a closed space, and the absorption of excess liquid components in the cosmetic is prevented. Further, the surface of the uneven portion of the container lid 1 may be subjected to a sand blasting process for giving further unevenness with fine sand. By providing fine unevenness to the uneven portion 2 by this sandblasting, the liquid component evaporated can penetrate into the unevenness, so that the liquid component can be more uniformly diffused. Next, a specific example of a container using the container lid 1 will be described. First, as a cosmetic container, a compact container 3 can be exemplified as shown in FIG. This compact container 3 has a plurality of concave and convex portions 2 on the back side of a container lid 4 connected by a hinge provided at one end of a container body 5.
Is provided over almost the entire surface. Here, in the uneven portion 2, a plurality of ridges are arranged at equal intervals in the vertical and horizontal directions.
Are arranged uniformly. In this manner, the evaporated liquid component of the cosmetic enters the concave portion 2b due to its surface tension, spreads evenly over the entire uneven portion 2, and the evaporated liquid component does not cause dew condensation. Does not grow and form water droplets. As the cosmetic container, in addition to a compact container, a bottle for providing a screw groove in the container body to store a cream or the like threaded in the container cover 4 or a small container for storing a plastic container or an eye shadow or the like. Can be exemplified. Next, as the food container, as shown in FIG. 5, a storage container for storing food for a relatively long time can be exemplified. This storage container has a storage part for storing foodstuffs, a container body (not shown) having an edge rib around an upper part of the storage part, and a container lid 6 to cover the container body.
The male and female fitting portions provided on the container body and the container lid 6 are fitted to each other to close the storage portion. A plurality of concave / convex portions 2 are provided on substantially the entire back surface of the container lid 6. Here, in the concavo-convex portion 2, a plurality of holes are arranged at equal intervals in the vertical direction and the horizontal direction so that the concave portions 2b are uniformly arranged. In this way, the evaporated liquid component of the cosmetic enters the concave portion 2b due to its surface tension, and further diffuses uniformly over the entire container lid 6, so that the evaporated liquid component does not cause dew condensation. However, this dew does not grow to form water droplets. As a container for storing foods, a glass container or a metal container in which a screw groove is provided in the container main body and which is screwed into the container cover 2 can be exemplified. Next, a comparison result between the container lid 1 according to the present embodiment and a container lid having a flat back surface side will be described below. In this test, the same container body and the same sample are stored in the container body and covered, and after a lapse of a predetermined time, the amount of the liquid component adhering to the container lid body is measured, and is visually observed. The inspection was performed. As a result of the test, the lid having a flat back surface had a liquid component amount of 1.006 × 10 ⁻⁴ g / cm ² , and water droplets were conspicuous. This means that the amount of the liquid component that can be attached per unit area is small because the back side is flat, and if an allowable amount or more of the liquid component adheres, the liquid component accumulates and causes dew condensation. On the other hand, the lid 1 according to the present embodiment
Is set such that the length A of one side of the uneven portion is 1.0 mm and the concave portion 2b
Is 0.4 mm, and sand blasting is performed on the uneven portion. As a result of the test, the amount of the liquid component was 30.000 × 10 ⁻⁴ g / cm ² , and water droplets could not be visually confirmed. That is,
Since the liquid component enters the concave portion 2b provided in the lid 1 and the amount of the liquid component that can be attached per unit area is large, it means that the liquid component is not conspicuous without causing dew condensation. According to the present invention, the liquid components evaporating from the contents stored in the container body by reaching the vapor pressure equilibrium quickly in the closed space can be minimized, and the evaporating liquid components can be used. It is possible to prevent the occurrence of dew condensation and make the lid inconspicuous even if the evaporated liquid component adheres to the back surface of the lid. Further, a lid which does not require labor and cost for manufacturing the lid can be obtained.

[Brief description of the drawings] FIG. 1 is a back view of a lid according to the present embodiment. FIG. 2 is an enlarged view of an uneven portion of the lid according to the embodiment. FIG. 3 is a cross-sectional view of an uneven portion of the lid according to the embodiment. FIG. 4 is a top view of the compact container according to the present embodiment. FIG. 5 is a rear view of the lid of the storage container according to the embodiment; [Explanation of symbols] 1 ... container lid 2 ... uneven parts 2a ... convex part 2b ... recess 3 ··· Compact container 4 ・ ・ ・ Container lid 5 ... container body 6 ... container lid

Claims (1)

(57) [Claims 1] A cover for closing a mouth of a container for storing contents therein, and a sand blaster having a rough surface on the back side of the cover.
And a plurality of uneven portions are formed over substantially the entire back surface of the lid, and the uneven portions are arranged in a vertical direction and a horizontal direction.
A container lid having a depth of 5.0 mm and a depth of 0.2 to 3.0 mm.