KR102539851B1 - Lids for airtight containers with locking blades - Google Patents

Abstract

The present invention relates to a lid for an airtight container with a locking flap, which can variously produce a product, comprising: a plate-shaped cover member (210); a frame member (220) injection-molded by using a polypropylene resin as a material; a cushion joint member (230) for forming a stacked space (232); and a packing (240) provided in a packing groove (221) of the frame member 220.

Description

Lids for airtight containers with locking blades}

The present invention relates to a lid for an airtight container, and more particularly, to a "lid for an airtight container equipped with a locking wing" to safely contain and store food (food) without leakage of odor or moisture.

In general, when food is stored in a refrigerator or the like, its unique odor and moisture are leaked out. To prevent this, food is stored in an airtight container. Such an airtight container has a container body with an open top and a lid provided with locking wings to open and close the container body. The container body is injection-molded in a square or cylindrical shape using synthetic resin as a raw material, and a storage space is formed inside. In addition, the open end of the side wall of the container body is provided with a protruding protrusion for hanging the locking wing of the lid. In addition, the locking wings are formed integrally so as to be able to pivot outward along the edge of the lid, and each of them is provided with a locking jaw so as to be caught on the locking protrusion. Therefore, when the lid is placed on the top of the container body and the locking wings are pressed downward, the locking jaw is elastically coupled to the locking protrusion of the container body, so that the lid is firmly locked. When the locking wing is lifted upward to take out the stored food, the locking jaw is released and the lid can be opened.

However, in conventional airtight containers, the container body made of synthetic resin (PP) is easily discolored by the stored contents, and recently, the purchasing power of the product is declining due to the negative image of endocrine disruptors unique to synthetic resin. In particular, the material of the container body and lid is polypropylene (referred to as 'PP'), which is a thermoplastic resin obtained by polymerizing propylene, which has excellent ductility but poor transparency. In addition, recently, Tritan resin, which does not induce endocrine disruptors and has excellent transparency, is also used. Tritan resin is an eco-friendly new material newly developed by Eastman Chemical, an American global company. It has both the advantages (transparency) of glass and is used for airtight container products. However, hard Tritan resin has excellent transparency but lacks ductility, so it cannot be applied to lid products with locking wings. That is, when a "lid product with integrated locking wings" used while being repeatedly folded is molded with Tritan resin, the snap-hinge part of the locking wing is easily damaged because the material is hard. For this reason, recently, products in which the container body is made of Tritan resin as a raw material and the lid with locking wings is made of polypropylene (PP) resin as a raw material have been released; Consumers are losing overall product purchasing power due to container lids made of polypropylene resin.

Republic of Korea Patent Registration No. 10-1510393 Republic of Korea Patent Publication No. 10-2020-0117928

The present invention is intended to solve these problems; An object of the present invention is to separately mold the cover member and locking wing of the lid with different materials, and then improve them so that they can be integrated through a cushion material, so that the product can be produced in various ways, and an eco-friendly material with excellent transparency (Tritan resin or eco-friendly material) It is to provide a "lid for an airtight container equipped with a locking wing" that can effectively apply gin resin, etc.).

In addition, another object of the present invention is to form a lock wing that requires ductility while being able to apply an eco-friendly new material such as Tritan or Ecozine, which has the advantages of both plastic and glass, to the lid of an airtight container, and then integrally configure it. Therefore, it is to provide 『a lid for an airtight container equipped with a locking wing』 that can also implement a locking function.

In addition, another object of the present invention is to provide a "lid for airtight containers equipped with locking wings" that can prevent damage during use by reinforcing the hinge portion of the repeatedly folded locking wings.

The present invention for achieving the above object; In the lid for an airtight container having a locking wing to open and close the airtight container provided with a hooking portion along an open upper edge;

A lid for an airtight container equipped with the locking wing; a cover member in the form of a plate formed by injection molding of a hard synthetic resin to cover an upper portion of the airtight container; It is injection-molded with polypropylene resin as a material, and is provided to surround the edge of the cover member at a predetermined interval, and inside, a packing groove open downward is formed in the form of a band, and the edge is mounted on the hanging part of the airtight container. A frame member in which a plurality of locking wings having locking jaws are integrally formed through a snap hinge portion so as to be sexually engaged; After the cover member and the frame member are inserted and placed in an injection mold, the cover member and the frame member are individually injection-molded with a soft rubber material along the space between the cover member and the frame member to integrate the cover member and the frame member, but the inside is stepped. A cushion joint member formed to surround an edge of the cover member while forming a cushion joint member that adheres to the inside of the frame member and forms a stacking space so that the lower part of the airtight container can be accommodated and stacked; Packing provided in the packing groove of the frame member and in close contact with the open top of the airtight container; It is characterized by providing.

In addition, the present invention is characterized in that the flange portion in which holes are perforated at regular intervals so as to penetrate vertically through the edge of the cover member is stepped.

In addition, the present invention is characterized in that the packing is made by injection molding in the form of a belt along the packing groove of the frame member during molding of the cushion joint member.

In addition, the present invention is characterized in that the hinge-reinforcing part covering the lock wing in the longitudinal direction along the upper surface of the snap hinge part is integrally injection molded together with the packing.

In addition, the present invention is characterized in that the cover member is molded of a transparent hard synthetic resin material.

According to the "lid for airtight container equipped with a locking wing" according to the present invention composed of the above configuration; A cover member made of hard synthetic resin and a frame member made of polypropylene resin having a plurality of locking wings are inserted and placed in an injection mold, and then integrated through a cushion joint member made of soft rubber material, thereby dissimilar materials. This product can be produced in a variety of ways, and has the advantage of being able to effectively apply transparent synthetic resins such as Tritan resin or ECOZEN, which are excellent in transparency and eco-friendly materials, to lids for airtight containers. In particular, according to the "lid for airtight container equipped with locking wings" according to the present invention; While applying a new hard synthetic resin material (trade name: Tritan or ECOZEN, etc.), which has the advantages of both plastic and glass, to the cover member, it has the effect of realizing the locking function by integrating the lock blades that require ductility. There is an advantage in that the product design can be further differentiated by applying the frame member equipped with various colors. In addition, the cushion joint member is firmly integrated with the edge of the cover member without a separate adhesive means by shrinkage change while curing, and since it is soft rubber in the process of shrinkage hardening, the cover member does not generate shrinkage deformation.

And according to the "lid for airtight container equipped with locking wings" according to the present invention; Since the hinge-reinforcing part is integrally injection molded together with the packing made of soft rubber, there is an advantage in preventing damage to the snap hinge part of the lock wing.

1 is an exploded view showing a state in which a lid according to the present invention is applied to a square airtight container.
2 is a perspective view showing a lid for an airtight container according to the present invention.
FIG. 3 is a cross-sectional perspective view taken along line Ⅲ - Ⅲ of FIG. 2 .
4 is an exploded perspective view of a lid for an airtight container according to the present invention.
FIG. 5 is a cross-sectional exploded perspective view taken along line V-V of FIG. 4 .
Figure 6 is a perspective view showing the excerpt of the cover member of the lid according to the present invention.
Figure 7 is a perspective view showing an excerpt of the frame member of the lid according to the present invention.
8 is a cross-sectional view showing the arrangement structure of a cover member and a frame member in an injection mold for molding a cushion joint member in the process of manufacturing a lid according to the present invention.
Figure 9 shows a state in which the packing and hinge reinforcement are molded together with the cushion joint member in the manufacturing process of the lid according to the present invention.
10 and 11 are cross-sectional views showing a state of use of the lid for an airtight container according to the present invention.

Hereinafter, one preferred embodiment according to the present invention will be described in detail with reference to the accompanying drawings.

<Description of the configuration of the lid for an airtight container equipped with locking wings according to the present invention>

Referring to Figure 1; The airtight container 100 to which the present invention is applied consists of a rectangular box with a storage space formed therein. That is, the airtight container 100 has a bottom and a side wall and is made of a box with an open top (TOP OPEN method), and a hooking part 110 is provided in the form of a band along the uppermost part of the open side wall.

And the lid 200 for an airtight container equipped with locking wings according to the present invention is for opening and closing while applying a locking function to the opening of the airtight container 100; As shown in FIGS. 2 and 3, a square cover member 210 that is injection-molded through a hard synthetic resin to cover the upper portion of the airtight container 100; A frame member 220 disposed to surround the edge of the cover member 210 at a predetermined interval and integrally molded with locking wings 222 along the edge; A cushion joint member 230 formed along the space between the cover member 210 and the frame member 220 to integrate them, and a packing 240 formed in a strip shape along the packing groove 221 of the frame member 220. ) is equipped. In particular, in the lid 200 for an airtight container according to the present invention, the cover member 210 and the frame member 220 are separately molded and manufactured through a different material that does not fuse, and then they are integrated through the cushion joint member 230. The detailed structure of each component for this is as follows.

First, referring to FIGS. 4 to 6; The cover member 210 constituting the lid 200 is injection-molded through a hard synthetic resin to cover the upper portion of the airtight container 100, and is stepped along the edge so that the cushion joint member 230 is inserted and fixed during molding. A branch 211 is provided. A plurality of holes 212 are drilled vertically through the flange portion 211 at regular intervals, so that when the cushion joint member 230 is formed, a portion thereof may be filled in the hole 212 and firmly linked. In an embodiment of the present invention, the cover member 210 is made of a plate shape capable of covering the upper part of the square sealed container 100, and in an embodiment of the present invention, the material thereof is transparent tritan resin (or eco-friendly new material). As a material, transparent SK Chemicals' ECOZEN, SAN, ABS, etc. can be applied) was applied. Tritan resin, which has the advantages of both plastic and glass, can be applied to the cover member 210 because the frame member 220 equipped with locking wings 222, which requires ductility, is separately molded and manufactured as described later. am.

And with reference to Figures 4 and 5 and 7; The frame member 220 constituting the lid 200 is also manufactured through a synthetic resin injection mold. That is, the frame member 220, unlike the cover member 210, is injection-molded with a polypropylene resin as a material, and is provided in the form of a square frame so as to cover the edges of the cover member 210 at regular intervals. The packing groove 221 opened downward is formed in a band shape. In addition, as shown in FIGS. 7 and 8, forming holes 226 are drilled at regular intervals so as to communicate with the packing groove 221 on the inside of the frame member 220, which is the cushion joint member 230 This is to ensure that it adheres firmly. And, at the edge of the frame member 220, a plurality of locking wings 222 having locking jaws 223 so as to be elastically caught on the hooking part 110 of the airtight container 100 through the snap hinge part 224. consists of a whole In the embodiment of the present invention, the frame member 220 is molded of polypropylene resin capable of exhibiting excellent ductility in the snap hinge portion 224, which is separately from the cover member 210 formed of Tritan resin through a synthetic resin injection mold. are manufactured

As shown in FIGS. 8 and 9, the cushion joint member 230 is formed by inserting and arranging the separately manufactured cover member 210 and frame member 220 in a soft rubber injection mold, and then inserting the cover member 210 and the frame member. Individual injection molding of soft rubber (elastoma, urethane, silicone material, etc.) material along the space between the 220 to integrate the cover member 210 and the frame member 220, the inside is a stepped jaw 231 While forming the hole 212 of the cover member 210 is formed to surround the perforated flange portion 211, the outer side is in communication with the packing groove 221 while filling the perforated molding holes 226 at regular intervals It sticks to the inside of the frame member 220 to form a stacking space 232 so that the lower portion of the airtight container 100 can be accommodated and stacked. On the other hand, due to the nature of the material, the cushion joint member 230 undergoes a shrinkage change of about 5/1000 to 12/1000 during the process of being cured after being molded. Even if this shrinkage change occurs, the cushion joint member 230 is elastic on its own. Since it has, shrinkage deformation does not occur in the cover member 210.

Referring to Figure 9; The packing 240 is formed by injection molding in a strip shape along the packing groove 221 of the frame member 220 during molding of the cushion joint member 230, and comes into close contact with the open top of the airtight container 100. The packing 240 is integrally injection molded together with the hinge-reinforcing part 233 covering the upper surface of the snap hinge part 224 of the lock wing 222 in the longitudinal direction. 8 and 9, the hinge-reinforcing part 233 is formed to fill the stepped part 225 formed along the upper surface of the snap hinge part 224, whereby the snap hinge part 224 The repetitive up-and-down bending operation is performed smoothly, but is not easily broken. In addition, the hinge-reinforcing part 233 and the edge-cover 234 surrounding the edge of the lock wing 222 may be integrally injection molded. The edge-cover 234 is molded to surround the edge of the locking wing 222, and it is also preferably made of soft rubber integrally with the packing 240 and the hinge-reinforcing part 233 without breaking. . In the embodiment of the present invention, the cushion joint member 230 has excellent moldability and can be integrated by being fused with the cover member 210 molded of a hard synthetic resin material and the frame member 220 molded of a polypropylene resin material. It is preferable to mold 'elastoma' as a material.

After all, if you configure the lid 200 for the airtight container to have the structure as described above; The cover member 210 may be molded with Tritan, an eco-friendly material having the advantages of plastic and glass, and the frame member 220 equipped with locking wings 222 may be separately manufactured with polypropylene resin. After inserting the cover member 210 and the frame member 220 into the injection mold for the cushion joint member, the packing 240 is molded together with the cushion joint member 230 with a soft rubber material, thereby forming the cover member 210 and the frame. The member 220 may be made of different materials. For this reason, by manufacturing the frame member 220 with a different color, it is possible to produce a more diverse product of the lid 200 for an airtight container, and it is possible to effectively apply an eco-friendly material (Tritan resin, etc.) with excellent transparency. In particular, an eco-friendly material such as Tritan or Ecozen, which is a transparent hard synthetic resin, can be applied to the lid 200 for an airtight container, and a locking function can also be implemented by integrating the locking wings 222 requiring ductility.

<Description of use of lid for airtight container according to the present invention>

Next, the state of use of the lid assembly for an airtight container according to the present invention configured as described above will be described with reference to FIGS. 10 and 11 .

First, as shown in FIG. 10, when the lid 200 according to the present invention is covered on the top of the airtight container 100, the open top of the airtight container 100 is in the packing groove 221 of the frame member 220. Adjoins the molded packing 240.

As shown in FIG. 11 in this state, pressing down the locking wings 222 of the lid 200, respectively (refer to the direction of the arrow in FIG. 11); The locking jaw 223 is caught and fixed by the locking part 110 while turning from the snap hinge part 224 as a starting point. At this time, since the locking jaws 223 of the locking wings 222 are elastically deformed and fixed, the locked state is not released unless artificial force is applied.

Then, when holding the locking wing 222 and lifting it upward, the part of the locking jaw 223 is elastically deformed and comes out of the hooking part 110. Therefore, the locking state of the locking wings 222 is released, so that the airtight container can be easily opened.

In addition, in the present invention, since the hinge-reinforcing part 233 is overlaid on the snap hinge part 224 of the lock wing 222, damage thereof is prevented even in the process of repeated folding operation when opening and closing the airtight container 100 can do.

Meanwhile, in the embodiment of the present invention, the lid 200 for an airtight container has been applied to a rectangular shape, but it is not limited thereto and the technical idea of the present invention can be applied to a circular lid assembly as well. In addition, in the embodiment of the present invention, it has been described that the packing 240 is integrally injection-molded together with the cushion joint member 230 using soft rubber, but it is not limited thereto, and only the packing 240 is separately manufactured to form a frame member. Of course, it can be inserted into the packing groove.

100..closed container 110..hanging part
200.. lid for airtight container 210.. cover member
211.. flange part 212.. hole
220.. frame member 221.. packing groove
222.. lock wing 223.. lock jaw
224.. snap hinge part 225.. stepped part
226.. Forming hole 230.. Cushion joint member
231.. stepped 232.. stacked space
233.. hinge-reinforcement 234.. edge-cover
240..packing

Claims (5)

In the lid for an airtight container equipped with a locking wing to open and close the airtight container 100 provided with the hooking portion 110 along the open upper edge;
The lid for the airtight container equipped with the locking wing;
It is injection-molded with a hard synthetic resin as a material to cover the upper part of the airtight container 100, and is provided stepwise along the edge and has a plate shape equipped with a flange portion 211 in which holes 212 penetrating vertically are perforated at regular intervals. With the cover member 210 of;
It is injection molded with polypropylene resin as a material, and is provided to surround the edge of the cover member 210 at regular intervals, and inside, a packing groove 221 open downward is formed in the form of a belt, and the sealing groove 221 is formed at the edge. A frame member 220 in which a plurality of locking wings 222 having locking jaws 223 are integrally formed through snap hinges 224 so as to be elastically caught on the hooking part 110 of the container 100;
After the cover member 210 and the frame member 220 are inserted and placed in an injection mold, the cover member 210 and the frame member 220 are separately injection-molded with a soft rubber material along the space between the cover member 210 and the frame member 220. 210 and the frame member 220 are integrated, but the inner side is molded to surround the flange portion 211 in which the hole 212 of the cover member 210 is perforated while forming the stepped jaw 231, and the outer side Fills the forming holes 226 drilled at regular intervals in communication with the packing groove 221 inside the frame member 220 and clings to the inside of the frame member 220 so that the lower part of the airtight container 100 a cushion joint member 230 forming a stacking space 232 to be accommodated and stacked;
Packing 240 provided in the packing groove 221 of the frame member 220 and in close contact with the open top of the airtight container 100; A lid for an airtight container equipped with a locking wing, characterized in that it is provided. delete According to claim 1,
The packing 240 is formed by injection molding in a strip shape along the packing groove 221 of the frame member 220 when the cushion joint member 230 is molded. According to claim 3,
The lock wing 222 is sealed with a lock wing, characterized in that the hinge-reinforcement part 233 covering the upper surface of the snap hinge part 224 in the longitudinal direction is integrally injection molded together with the packing 240 Lid for container. According to claim 1,
The cover member 210 is a lid for an airtight container with locking wings, characterized in that molded from a transparent hard synthetic resin material.

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