CN2478954Y - Plastic container cover - Google Patents

Abstract

A plastic container cover comprises a cover body, an inner pad and a sealing pad. The cover body comprises a top plate, an annular retaining edge is arranged at the inner wall near the top plate, the inner pad is installed between the retaining edge and the top plate, comprises a top plate and a peripheral surface structure, and a stop edge is arranged protruding inwardly at the bottom edge of the peripheral surface structure, and an annular groove is formed between the stop edge and the top plate; the sealing pad is arranged in the annular groove, the sealing pad is provided with a raised annular outer edge and an annular inner edge, and an annular groove is formed between the annular outer edge and the annular inner edge for clamping on the outer edge of the bottle mouth. The utility model can prevent the gas in the bottle from leaking out, and has a good sealing effect.

Description

plastic container lid

The utility model relates to a plastic container cover for the bottle mouth of a bottle-shaped container.

In the past, in order to prevent the gas in the container from leaking easily after the container was filled with beverages, some matching structures were usually designed on the bottle cap; Foot, when in use, the ring-shaped middle foot extends into the mouth of the bottle, and sticks to the wall of the bottle mouth to achieve the purpose of sealing and preventing leakage.

However, in the aforementioned bottle cap structure, the middle foot is integrally formed with the bottle cap body. When the bottle cap body is rotated maliciously or inadvertently (before reaching the starting state), the middle foot will rotate accordingly and the gas inside the bottle will leak out. , so this kind of conventional bottle cap is unsatisfactory on the effect of anti-leakage.

Thereupon, a kind of bottle cap that improves the midfoot structure of the aforesaid customary utensils, and a bottle cap with better anti-leakage effect, is disclosed on Taiwan Patent Announcement No. 290510, which mainly installs a sealing gasket in the bottle cap body , the sealing pad is provided with a midfoot that can be embedded inside the bottle mouth, and can be attached to the wall of the bottle mouth by the flange on the outer peripheral surface of the midfoot; if the bottle cap body is rotated maliciously or inadvertently, the gasket will The bottle cap body does not have a fixed connection relationship, so it can still be tightly plugged at the bottle mouth without being rotated, so the purpose of preventing air leakage can be achieved.

Although the separate design of the bottle cap and the sealing gasket has the effect of preventing gas leakage, when used in the actual production line, it is found that although the bottle with a relatively leak-proof cap is locked on the bottle, there will still be gas leakage; the main reason is that When carrying bottles on the production line, it is often possible to knock the bottle. Therefore, when the bottle mouth is subjected to a large external force, the bottle mouth, bottle cap and the gasket inside the bottle cap will instantly increase the stress and deformation, especially If the gasket and the bottle cap are made of the same hard material, the sudden increase in stress and deformation will cause the gasket to break easily, and when the bottle cap and the mouth of the bottle may also be deformed or broken, it is difficult to The sealing effect is fully locked, so the gas can easily leak out.

In addition, after the bottle is hot-filled with beverages, there will often be pressure changes in the bottle during the bottling process of high-temperature filling and cooling (that is, negative pressure), which makes the bottle cap under negative pressure and has a convex or concave situation. , it will also deform the gasket; at this time, it is difficult to ensure the best fit between the surface of the midfoot extending into the inside of the bottle mouth and the inner wall of the bottle mouth, and it is also difficult to form a sealed fit between the top surface of the gasket and the mouth of the bottle. , so it will increase the chance of air leakage; especially when the bottle cap is almost saturated under negative pressure, if it is hit by an external force, the gasket and the bottle cap are easily deformed, and the sealed state cannot be maintained.

In view of the above-mentioned problem of gas leakage inside the bottle, the purpose of this utility model is to provide a plastic container cover, which not only prevents the leakage of gas in the bottle when the bottle is opened maliciously or inadvertently (not reaching the purpose of opening), but also prevents the gas from leaking out of the bottle. When impacted by external force, it can also form a good sealing effect between the gasket and the bottle mouth.

In order to achieve the above purpose, the utility model provides a plastic container cover, which includes a cover body, an inner pad, and a sealing pad, and is characterized in that:

The cover body includes a top plate and a peripheral surface structure perpendicular to it, and the inner wall of the peripheral surface structure is provided with threads for screwing the container, and an annular retaining edge is provided near the top plate, so that the retaining edge and the top plate Form an accommodating distance between them;

The inner pad is installed in the accommodating distance of the cover body, and includes a top plate that fits with a peripheral surface structure perpendicular to it, and a ring-shaped abutting edge protrudes inward from the bottom edge of the peripheral surface structure, and the abutment An annular slot is formed between the edge and the top plate;

The gasket is installed in the ring-shaped groove of the inner pad. One side is smooth, and the other side is provided with a raised ring-shaped outer edge and a ring-shaped inner edge. A ring groove is formed between the edges for clamping on the outer edge of the bottle mouth. When in use, the bottle cap is locked on the bottle mouth, and the ring groove of the sealing gasket is sleeved on the bottle mouth so that the ring-shaped inner and outer edges are respectively clamped on the inner and outer walls of the bottle mouth.

The plastic container lid is characterized in that: the inner gasket can have relatively high hardness, while the sealing gasket has relatively low hardness.

The plastic container lid is characterized in that: the inner gasket and the sealing gasket can be combined and installed in the accommodating space of the lid body, and have a certain distance from the lower annular retaining edge of the lid body.

The plastic container lid is characterized in that: the length of the ring-shaped inner edge of the sealing gasket can be greater than the length of the ring-shaped outer edge.

The plastic container lid is characterized in that: the inner surface of the ring-shaped outer edge of the sealing gasket can be in the shape of an outwardly inclined inclined surface.

In the plastic container cap of the present utility model, the hardness of the sealing gasket is lower (softer) than that of the inner gasket and the bottle cap body; when combined, the inner gasket and the bottle cap body are in contact, so that the bottle can be twisted due to the higher hardness of each other. It is less laborious to cover; as for the softer sealing gasket and the bottle mouth, it can form a better sealing effect.

In addition, after the bottle cap, the inner pad and the sealing pad in the utility model are formed of the plastic container cap and the bottle mouth of the bottle are locked, when the bottle cap is rotated at the beginning, the inner pad and the sealing pad do not rotate or displace thereupon, and also That is, it has the effect of two-stage opening.

The plastic container cap of the utility model can not only prevent the gas in the bottle from leaking out when the bottle is opened maliciously or inadvertently, but also can form a good sealing effect between the gasket and the bottle mouth when the bottle is hit by an external force.

In order to further understand the structural features, purpose and effect of the utility model, a preferred feasible embodiment is hereby given, and detailed description is as follows in conjunction with the drawings.

Fig. 1: is the exploded view of the utility model.

Fig. 2: is the structural representation of the utility model.

Fig. 3: is the embodiment diagram of the combination of the utility model and the bottle.

Fig. 4: is one of the deformation schematic diagrams of the utility model subjected to pressure.

Fig. 5: It is the second schematic diagram of deformation of the utility model subjected to pressure.

See also shown in Fig. 1, 2, 3, the plastic container cover of the present utility model is made up of cover body 11, inner gasket 31 and gasket 41, and wherein cover body 11 is made of a top plate 13 and the peripheral surface structure perpendicular thereto 15, and on the inner wall of the peripheral structure 15, a thread 17 for screwing the container is provided, and an annular retaining edge 19 is provided near the top plate 13, so that an accommodating distance is formed between the retaining edge 19 and the top plate 13 twenty one.

The inner pad 31 is installed in the accommodating space 21 of the cover body 11, and it is composed of a top plate 33 matched with a peripheral structure 35 perpendicular to it, and a ring-shaped ring is protruded inward from the bottom edge of the peripheral structure 35. The abutting edge 37 and an annular locking groove 39 are formed between the abutting edge 37 and the top plate 33 .

The gasket 41 is installed in the annular groove 39 of the inner pad 31, one side is smooth, and the other side is provided with a protruding annular outer edge 43 and an annular inner edge 45, and on the annular outer edge 43 An annular groove 47 is formed between the annular inner edge 45 for clamping the outer edge of the bottle mouth 53 of the bottle 51 .

Further, the inner gasket 31 has higher hardness, while the sealing gasket 41 has a lower hardness, so the combination of the inner gasket 31 and the sealing gasket 41 is installed in the bottle cap 11, so that the top plate of the inner gasket 31 33 is in contact with the top plate 13 of the bottle cap 11, and when the combination of the inner gasket 31 and the sealing gasket 41 is installed in the accommodating distance 21 of the cover body 11, there is a distance from the retaining edge 19 of the inner wall of the bottle cap 11.

In addition, the length of the annular inner edge 45 of the gasket 41 can be made longer than that of the annular outer edge 43 , and the inner surface of the annular outer edge 43 of the gasket 41 can be made into an outwardly inclined inclined surface 49 .

The structure that bottle cap 11, inner pad 31 and sealing pad 41 are formed is installed on the bottle mouth 53 of bottle 51, and now the screw thread 17 that this bottle cap 11 inner wall surface is set can be with the screw thread on the bottle mouth 53 surface of bottle 51. 55, and the annular groove 47 provided by the sealing gasket 41 is just set on the end of the bottle mouth 53, so that the annular inner edge 45 and the annular outer edge 43 can be attached to the inner wall surface 57 and the outer wall surface of the bottle mouth 53 respectively. 59, form a clamping state, so that the bottle mouth 53 places form a sealed state.

Because the top plate 13 of the bottle cap 11 is in contact with the top plate 33 of the inner pad 31, and both are smooth surface members with high hardness, so the contact friction force is small; and the sealing pad 41 is a member with a lower hardness and has a certain softness. In addition, the inner edge 45 and the outer edge 43 are clamped on the bottle mouth 53, so when the bottle cap 11 is rotated, the bottle cap 11 can be rotated under a small torque state, so as to reduce the applied force; If it is malicious or not easy to twist, because of the combination of the sealing gasket 41 and the inner pad 31, the outer edge 43 and the inner edge 45 of the sealing gasket 41 are clamped on the bottle mouth 53, and the retaining edge with the bottle cap 11 is added. 19 are separated by a certain distance so that when the bottle cap 11 is twisted, the retaining edge 19 pushes the combination of the sealing gasket 41 and the inner gasket 31, so that the sealing gasket 41 can seal the bottle mouth 53 and prevent the gas inside the bottle 51 from Leakage.

And when there is an external force impact at the bottle mouth 53, although the bottle cap 11, the inner pad 31, and even the gasket 41 are deformed, because the gasket 41 is made of a material with a lower hardness, it has a better fit and sealing effect , and there is a higher allowable strain effect so as not to form a rupture, so the bottle mouth 53 is under the dual effects of a better fitting effect on the sealing gasket 41 and less resistance to deformation and rupture, so it is not easy to produce gaps; in other words, the gas is not easy to leak out. The leak has a good sealing effect.

In the present utility model, under the change of internal and external pressure of the bottle 51, the combination of the bottle cap 11, the inner pad 31 and the sealing pad 41 on the bottle mouth 53 will also produce a concave-convex deformation state. Deformation and produce rupture situation; please refer to shown in Figure 4, when gasket 41 presents protruding deformation, the ring-shaped inner edge 45 and the ring-shaped outer edge that were originally clamped on the inner and outer wall surfaces 57,59 of the bottle mouth 53 The edge 43 will also be inclined, and now the inclined surface 49 on the inner side of the annular outer edge 43 can be tightly attached to the outer wall surface 59 of the bottle mouth 53; When the force sags, the sealing gasket 41 will also become concave, and because the sealing gasket 41 has the characteristics of low hardness, it can be placed in a close-fitting state, so the annular inner edge 45 of the sealing gasket 41 can be tightly attached to the bottle mouth with deformation. The inner wall surface 57 of 53 forms a good sealing state. And the abutting edge 37 of the inner pad 31 supports and drags the annular outer edge 43 of the gasket 41, so once the internal negative pressure is saturated, the hard abutting edge 37 firmly embeds the soft annular outer edge. The edge 43 makes the annular outer edge 43 be able to seal the bottle mouth 53; When encountering an external force impact, although the cover body 11 and the hard inner pad 31 may indirectly bear the impact, the soft sealing gasket of the bottle mouth 53 41 can take advantage of its soft characteristics to absorb the amount of deformation, without affecting the sealing state with the bottle mouth 53 at all. Therefore, the utility model can make the gasket 41 and the bottle mouth 53 place Keep a good seal.

To sum up, the utility model is composed of a bottle cap, an inner pad and a sealing pad, and keeps a small friction force between the inner pad and the bottle cap, reduces the user's torque when opening the bottle, and the sealing pad has a lower hardness , and has ring-shaped inner and outer edges to be clamped at the bottle mouth, so that it has a good sealing effect with the bottle mouth.

Claims (5)

1, a kind of container closure of plastic comprises pad, a packing seal in the lid,, it is characterized in that:

This lid comprises a top board and vertical with it all surface constructions, and in this in week the surface construction internal face be provided with screw thread for the container that spins, and be provided with ring-type retaining edge near the top board position, make formation one ccontaining spacing between this retaining edge and top board;

Should in pad, be mounted in the ccontaining spacing of lid, comprise that a top board cooperates vertical with it all surface constructions, and in this in week the surface construction root edge inwardly be convexly equipped with supporting of ring-type and end edge, and should support and end formation one ring-type draw-in groove between edge and this top board;

The sealing pad is mounted in the ring-type draw-in groove of pad in this, and it simultaneously is level and smooth shape, and another side is provided with the annular outer edge and the annular inner edge of projection, and the formation annular groove supplies clamping in the bottleneck outer rim between annular outer edge and annular inner edge.

2, container closure of plastic as claimed in claim 1 is characterized in that: spacer has higher hardness in this, and the sealing spacer is than soft.

3, container closure of plastic as claimed in claim 1 is characterized in that: in this pad and packing seal aggregate erection in the ccontaining spacing of lid, with the ring-type shelves edge of this lid of below at a distance of a segment distance.

4, container closure of plastic as claimed in claim 1 is characterized in that: the length of the annular inner edge of sealing pad is greater than the length of annular outer edge.

5, container closure of plastic as claimed in claim 1 is characterized in that: the annular outer edge inner face of sealing pad is outward-dipping inclined plane type.

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