KR20040050542A - A container cover - Google Patents

Abstract

PURPOSE: A lid of a container is provided to cover tightly the lid by elasticity of a folding portion formed of an upper side wall of the lid, to easily open and close the lid, and to smoothly close the lid by the remaining air circulation in the container. CONSTITUTION: The container lid made of plastics for covering an entrance(2) of a container(1) comprises an upper side wall(12) with a circumference portion; a skirt(14) being downward extended to the circumference portion for covering a part of the side wall(4) of the container; a folding portion(16) formed as one with the upper side wall(12) and being capable of expansion and contraction upon operation of opening and closing; and an expanding portion(18) being expanded and tightly closed to a mounted rim of the container by the elastic operation of the fold portion.

Description

A container cover

The present invention relates to a lid that is injection-molded with plastics to seal containers of various shapes, and more particularly to a lid of a container that enables a good sealing and smooth opening and closing operation by a wrinkle part.

Generally, a container is used to store or use various types of contents, including various foods, which may be used alone, but most of them are used to prevent the inflow and discharge of wastes, as well as storage or transportation problems. To prevent this, a lid made mainly of metal or plastic is covered at the entrance of the container to be sealed.

In addition, such a lid is different in its coupling form due to various kinds of contents, transportation or storage conditions. For example, when the lid is frequently opened and closed, the lid is fastened and closed using its own elastic force. Or by using a separate locking member formed to correspond to the container and the lid is largely classified into a structure for sealing.

However, in the case of the lid that seals the container without using a separate locking member, as in the former case, the trouble of manipulating the locking member is eliminated, or the sealing force is inadvertently peeled off or the sealing force is questioned. In the latter case, the sealing force by the locking member is maintained, but the inconvenience caused by the opening and closing operation is caused, which is not suitable for the storage of frequently used contents.

Above all, the problem with the conventional lid is in a closed lid which is molded from a flexible plastic without a locking member, and this type of lid is now widely used. Such plastic lids are particularly difficult to achieve a good sealing effect and are not easy to open and close. For example, the fitting portion of the lid must be pressed against the mounting rim of the container very tightly, and it must be separated and designed and manufactured so that the combination thereof can be made accurately. This problem is due to the fact that, above all, it is closed depending only on the elasticity of the fitting part made of a soft material.

Therefore, even if the plastic lid has a good sealing effect, it is a situation that a lid that can be easily opened and closed is required.

SUMMARY OF THE INVENTION An object of the present invention is to provide a lid of a container having good sealing property and simple opening and closing operation by the elasticity of the pleats formed by the upper wall of the lid.

Another object of the present invention is to provide a lid of a container which allows a closing operation of the lid by residual air communication inside the container to be made more smoothly.

1 is a partially cut perspective view of a lid coupled to a container according to the present invention;

Figure 2 is a side cross-sectional view of the present invention before the lid is joined to the container.

Figure 3 is a side cross-sectional view showing a state in which the lid of the present invention is coupled to the container;

Figure 4 is a side cross-sectional view showing a state in which the expansion air inside the container is discharged to the outside through the air valve plate when the lid of the present invention is coupled to the container;

Figure 5 is a cross sectional side view after the lid of the present invention is coupled to a container;

Figure 6 is a partially cutaway perspective view showing a state in which the lid of the present invention is formed in a circular shape.

※ Code explanation about main part of drawing ※

1: container 2: inlet

3: bottom part 4: side wall

5: mounting rim 10: lid

12: top wall 14: skirt

16: wrinkle part 18: fitting part

20: air discharge means 22: air hole

24: fixing hole 26: air valve plate

This purpose is provided with the upper wall together with the elastic material of the wrinkle part formed along the periphery of the upper wall which is injection molded from a single material, and the air for properly discharging the expansion pressure by the residual air inside the container to the outside when the lid is closed. It is sufficiently achieved by the discharging means.

Hereinafter, with reference to the accompanying drawings, preferred embodiments for achieving the objects and features of the present invention will be described in detail. Like parts are designated by like reference numerals in the accompanying drawings.

Referring to FIG. 1, the lid according to the present invention is indicated generally by the reference numeral 10. Typically, the lid 10 is covered on the inlet (2) of the container (1) in which the various contents are contained to cover the inflow of various foreign substances or discharge of the contents.

The inlet 2 of the container 1 is usually formed by a bottom 3 and a side wall 4 extending upwardly from the periphery of the bottom 3, which is rectangular, more specifically rectangular. Formed. However, it can preferably be used in other shapes or various sizes, such as round, oval, square, and the like.

In addition, the side wall 4 of the container 1 can be formed as a single unit with respect to the bottom part 3, and in particular, can be formed of various materials, such as pressing into metal, preferably stainless, or injection molding into plastic. .

The lid 10 includes an upper wall 12 having a perimeter. Top wall 12 may be flat to maintain strength but may be of a more complex shape. For example, it may have a plurality of stepped surfaces.

Below the periphery of the upper wall 12 is extended a skirt 14 for covering a portion of the side wall 4 of the container 1 when engaged. In this case, the skirt 14 may be formed to have a predetermined width as shown in FIG. 1, but may have various shapes in order to further improve the design at the same time in consideration of various circumstances such as the use of the product or the demand layer.

Around the periphery of the upper wall 12 is formed a pleated portion 16, which is stretchable material when the container 1 is engaged. The wrinkle portion 16 is most preferably formed in the inner peripheral portion except the center portion of the lid 10, but is not limited thereto. Preferably it is formed in the center of the upper wall 12, or in the inner periphery of the peripheral wall of the upper wall 12 or centrally formed in consideration of the design enough while maintaining the original stretching function, or in the peripheral portion And may be formed intermittently in a central portion or an appropriate position.

The wrinkle portion 16 is most preferably formed to have a cross-sectional shape consisting of a single or a plurality of waveforms, but is not necessarily limited thereto, it is not necessarily limited to a specific form as long as the elastic material function is possible. The thickness of the wrinkles 16 may be the same thickness as compared to the upper wall 12 having the non-pleat portion, but most preferably, the thickness of the wrinkles 16 is greater than that of the portion where the wrinkles are not formed. It is preferable to form thinner so that good elasticity (extension / contraction) is exerted upon opening and closing of the lid 10 to the container 1.

The top wall 12 and the skirt 14 constituting the lid 10 may be formed of different materials, but preferably, injection molding is made of a single soluble material such as plastic. In addition to this, it is also possible to double injection in different materials, respectively.

In addition, although the upper wall 12 is not shown in the drawings, the overall flatness may vary. For example, it is possible to determine the type of contents contained in the container 1 without opening the lid 10 by forming a see-through window of various forms. Preferably, the part forming the see-through window is formed by a flat polished surface and the remaining part by a blocking surface pattern. As the blocking surface pattern, the blocking surface itself may be formed as a matte surface, or may be formed in various forms.

On the other hand, the fitting portion 18 is fitted to the mounting rim 5 formed above the side wall 4 of the container 1 to cover the inlet 2 of the container 1 to seal the inside of the container 1 as This fitting portion 18 usually has the same shape as that of the mounting rim 5 of the container 1.

In addition, in view of the fact that the fitting portion 18 is opened and closed through the expansion and contraction of the pleats 16 due to the characteristics of the present invention, the fitting portion 18 needs to be the same area as the mounting rim 5 of the container 1. It is desirable to have a region slightly smaller than this.

In addition, the fitting portion 18 is preferably formed continuously or discontinuously by the locking step 181 for preventing the reinforcement of the prevention of separation of the lid 10 unintentionally sealed according to the shape of the mounting rim (5) of the container (1). However, this is not an essential structure in the present invention, and may be unnecessary depending on the shape of the mounting rim 5, or may be formed in various other forms.

Since the sealing by the fitting part 18 is determined by the fitting to the mounting rim 5 of the container 1, it is desirable to have a definite blocking effect against the inflow of various foreign substances, the discharge of the contents, and the passage of moisture. It is very preferable to prevent the passage of air.

Subsequently, referring to FIG. 1, the lid 10 is provided with air discharge means shown in FIG. 20. The air discharge means 20 includes an air hole 22 formed by the upper wall 12 in which the pleats 16 are not formed, and an air valve plate 26 fitted into the fixing hole 24.

The air hole 22 is for discharging the compressed air remaining inside the container to the outside due to the cover of the lid 10 during the closing operation of the lid 10 to the container 1, it can be formed in a single or a plurality of. .

In addition, the air valve plate 26 detachably fitted to the fixing hole 24 is normally lifted by the discharge pressure of the air only, for example, during the closing operation of the lid 10 to release the air hole 22 and always close it otherwise. It is possible to use various materials such as materials having good elasticity, preferably synthetic rubber or silicone, which is hygienic and harmless to the human body.

In the present invention, the lid 10 can be used independently with the air discharging means 20 removed, and can also be used with the air discharging means 20 simultaneously employed.

The mounting of the air venting means 20 to the lid 10 will be described in more detail below, but more preferably at the time of closing the lid 10 the mounting rim 5 for covering the inlet 2 of the container 1. When the fitting portion 18 of the lid 10 is fitted with respect to the lid 10, the closing operation of the lid 10 due to the repulsion of the compressed air due to the sealing inside the container 1 is made more smoothly than without adopting it. It is possible to do This smooth closing operation is achieved by forcibly discharging the compressed air remaining inside the container 1 through the air hole 22 formed in the bottom surface 12.

Accordingly, when the lid 10 is closed due to the discharge of the compressed air inside the container 1, the sealing resistance is reduced so much that the smooth closing is possible, and the feeling of the mounting rim 5 is reduced even by relatively low pressure. It is to be sure that the sealing portion 18 is sealed.

On the other hand, the skirt 14 of the lid 10 is integrally formed with a re-snip piece 15 for opening operation of the lid 10 to the container 1, this configuration has been used for a long time, the present invention Is not an unusual technique, and its forms vary.

The opening and closing operation state of the lid 10 having the pleated portion 16 according to the present invention configured as described above will be described in more detail with reference to FIGS.

2 and 3 are views showing a state before the lid 10 is closed with respect to the container 1 and a state of being slowly closed from one side.

First, referring to FIG. 2, before the lid 10 is closed with respect to the container 1, the pleats 16 formed by the upper wall 12 are kept in a state of contraction (contraction) by their own elasticity, and the air The hole 22 is also closed by the air valve plate 26.

In this state, as shown in FIG. 3, in order to cover the inlet 2 of the container 1, the mounting rim 5 having one side fitting portion 18 of the lid 10 formed on the upper side of the side wall 4 of the container 1. After pressing the other side in the direction of the arrow (see "A" in Figure 3) or not shown in the figure, but presses approximately the center of the upper wall (12).

At this time, the pleats 16 of the lid 10 are extended to some extent by the pressing force. For example, the fitting portion 16 is pushed and pressed by the pressing force against the mounting rim 5 of the container 1 to be extended while being evenly extended by the area range of the mounting rim 5. At this time, the wrinkled portion 16 that is stretched is relatively thin in cross section and has a wavy cross section as compared to other portions of the upper wall 12 in which the wrinkled portion 16 is not formed as shown in FIG. It becomes possible.

4, when the lid 10 is closed, the compressed air remaining inside the container 1 forces the air valve plate 26 through the air hole 22. As it is discharged to the outside as it enters the furnace, the closing resistance is reduced so much that the smooth closing is possible. That is, when the lid 10 is slowly closed from one side with respect to the container as shown in FIG. 3 and completely closed as shown in FIG. 5, an inflation pressure of air is essentially generated inside the container 1 in the closing process of the lid 10. It must be.

Therefore, if the expansion pressure of the air is not released, the lid 10 may receive the expansion pressure of the air that the upper wall 12 is to be discharged to the outside, so that the closing operation may not be performed smoothly. As the inflation pressure of the air is forced out immediately through the air hole 22 closed by the air valve plate 26, the closing resistance of the lid 10 is reduced, thereby reducing the closing force of the lid 10 The lid 10 closes smoothly and quickly to cover the container 1, and at the same time, the fitting portion 18 with respect to the mounting rim 5 of the container 1 is adapted to the contracting force of the pleats 16 in an extended state. By doing so, keep a tight seal.

When the closing operation of the lid 10 is completed as shown in FIG. 5, the air valve plate 26 lifted upward is returned by its own elastic force to close the air hole 22 again, and the container is closed by this closing operation. The contents stored inside (1) are blocked from contact with air.

On the other hand, the air discharge means 20, as shown in Figure 4, the discharge of the expansion air generated inside the container 1 during the closing operation of the lid 10, as well as the contents stored in the container 1 as necessary, for example, is a fermented food In this case, by properly discharging the fermentation gas generated in the fermentation process (see arrow “B” in FIG. 5) to the outside, the inside of the container 1 is prevented from expanding, thereby preventing the arbitrary release of the lid 10 due to the expansion gas. In addition, it has the function to enable safe storage of food.

In this state, when the lid 10 is to be artificially separated from the container 1, the re-sewing piece 15 formed by the skirt 14 of the upper wall 12 is slightly lifted upward. At this time, the lid 10, the portion of the re-needle piece 15 is made possible by the smooth upper re-immersion operation by the wrinkle portion (16). For example, since the upper wall on which the wrinkles 16 are formed is not flat but forms a wavy wrinkle, the smooth re-injection operation can be facilitated by that much.

Therefore, the lid 10 opened from one side by the re-immersion of the re-engraving piece 15 is opened while the fitting portion 18 is gradually released from the mounting rim 5 of the container 1, and at the same time the corrugated portion ( It is to open more quickly by the self-shrink action of 16) to release the sealed state to the container (1).

On the other hand, Figure 6 is a view showing a structure in which the lid 10 according to the present invention forms a circular shape rather than a rectangular shape, various shape deformation of the lid 10 has already been described above, it is installed as the upper wall 12 Since the air discharge means 20 is also the same, a detailed description thereof will be omitted for convenience.

According to the present invention as described above, the opening and closing operation of the lid by the elastic material force of the pleated portion formed by the upper wall can be easily and easily provide a good sealing effect. In addition, the air discharge means installed in the upper wall provides an advantage that the lid can be smoothly closed even with a small force due to a decrease in resistance due to the expansion pressure of the air remaining inside the container, especially when the lid is closed. Will be.

Although the present invention has been described with reference to the accompanying drawings, many embodiments may be made without departing from the scope of the present invention, and all of the details described herein or shown in the accompanying drawings are not limiting. It should be construed as illustrative.

Claims (10)

In constructing a plastic lid to cover the opening of the container: An upper wall having a periphery; A skirt extending downwardly of the peripheral portion to cover a portion of the sidewall of the container; A wrinkle portion integrally formed with the upper wall and stretchable during opening and closing operation; And And a fitting portion which is fitted and sealed against the mounting rim of the container by the stretching action of the pleats. The lid of claim 1, wherein the pleats are concentrated inwardly along the periphery of the top wall. The lid of claim 1, wherein the corrugation is formed intermittently with respect to the center portion of the upper wall as well as the central portion thereof. The lid of any one of claims 1 to 3, wherein the pleats have a cross section in the form of a single or a plurality of corrugations. The lid of the container of claim 1, wherein the upper wall is further provided with air discharge means for releasing the expansion pressure due to residual air in the container during the closing operation. 6. The air vent according to claim 5, wherein the air exhausting means is formed at a predetermined point on the upper wall except for the corrugation portion. A lid of the container, characterized in that the air valve plate fitted to the fixing hole formed by the upper wall to block the air hole and having an elastic force. The lid of claim 1, wherein the top wall and skirt having the periphery are integrally formed of a single material having flexibility. 8. The lid of claim 7, wherein the material is a hard material. The lid of the container of claim 1, wherein the corrugation formed by the upper wall is formed to have a cross section having a thin thickness as compared to the non-pleat portion, so that a good elastic material force is exerted by its elasticity. The lid of claim 1, wherein the region of the fitting portion has an area less than that of the mounting rim of the vessel.