A plastic sealing cover and a plastic sealed can containing the same

Abstract

The present invention relates to a plastic sealing cover and a plastic sealed can including the same. The plastic sealing cover includes an inner sealing member and an outer cover body. Wherein, the outer cover body includes an upper cover and a base, the base is hinged to the upper cover through a folding connecting portion, the upper cover is used to snap onto the base, and the outer cover body is used to cover the port of the can to be sealed. The inner sealing member is made of an elastic material and is fixedly arranged on the inner side wall of the outer cover body. After the outer cover body covers the port of the can, the inner sealing member can wrap the outer edge of the port of the can and seal the gap between the edge of the port of the can and the outer cover body. The inner sealing member in this plastic sealing cover can contact the port of the can, achieving better cooperation with the can, improving the sealing effect, and preventing the milk powder inside the can from getting damp or leaking out.

Description

Technical Field

[0001] The present invention relates to the technical field of food packaging, and particularly to a plastic sealing cover and a plastic sealed can containing the same. Background Art

[0002] It is well-known that edible solid powders can be packed in a can body, and the can body is usually provided with a metal outer cover and a sealing layer. However, during use, since the metal outer cover is difficult to open and the sealing layer cannot be restored after being opened, it is difficult to perform secondary sealing between the metal outer cover and the can body, which is neither convenient for long-term storage of food nor for multiple feedings of food.

[0003] For milk powder, which has a small amount used each time and a long usage time per can, higher requirements are put forward for the sealing performance of the can body. Currently, iron cans and sealing covers are commonly used on the market. An embedding groove for clamping the can body is provided at the inner bottom of the sealing cover, and a raised belt is provided on the inner wall of the embedding groove, but its sealing performance is insufficient. Summary of the Invention

[0004] The purpose of the present invention is to provide a plastic sealing cover and a plastic sealed can containing the same to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the technical solutions adopted by the present invention are as follows:

[0006] In a first aspect, a plastic sealing cover is provided, which includes: an inner sealing member and an outer cover body;

[0007] Among them, the outer cover body includes an upper cover and a base, the base is hinged to the upper cover through a folding connection part, the upper cover is used to be buckled with the base, and the outer cover body is used to cover the port of the can body to be sealed;

[0008] The inner sealing member is made of an elastic material and is fixed on the inner side wall of the outer cover body. After the outer cover body covers the port of the can body, the inner sealing member can cover the outer edge of the port of the can body and seal the gap between the edge of the port of the can body and the outer cover body.

[0009] As a further improvement of the present invention, the inner sealing member has an annular structure, and the inner sealing member includes a sealing ring and an extension part;

[0010] Among them, the sealing ring is fixed on the inner side wall of the outer cover body and has an annular structure;

[0011] The extension part is arranged on the upper edge of the sealing ring, is perpendicular to the axis direction of the outer cover body and has an annular shape, and the extension part is used to be in contact and cooperate with the port of the can body after the outer cover body covers the port of the can body.

[0012] As a further improvement of the present invention, the end of the extension portion is provided with a protrusion which is consistent with the side direction of the outer cover body and faces the opening direction of the outer cover body. The protrusion is used to cooperate with the outer side wall of the tank body port after the outer cover body covers the tank body port.

[0013] As a further improvement of the present invention, an annular boss is further provided on the side of the sealing ring away from the inner wall of the outer cover body.

[0014] As a further improvement of the present invention, the sealing ring, the extending portion, the protrusion and the annular boss are integrally formed.

[0015] As a further improvement of the present invention, an annular reinforcing rib is provided inside the base for providing support when the outer side wall of the extension portion and the tank body port come into conflict with each other.

[0016] As a further improvement of the present invention, the inner sealing member and the outer cover are an integrated structure.

[0017] As a further improvement of the present invention, the material of the inner layer sealing member is TPE, TPU or LDPE, and the material of the outer layer cover is PP.

[0018] As a further improvement of the present invention, the upper cover comprises: a cover top, an inner ring, and an upper cover wall surrounding the outer edge of the cover top, the base comprises: a lower cover wall and a sealing cover, the inner diameter of the sealing cover is equivalent to the outer diameter of the inner ring, in a closed state, the outer wall of the inner ring is tightly attached to the upper inner wall of the sealing cover, and the inner layer sealing member is arranged on the lower inner wall of the lower cover wall;

[0019] A lock buckle is arranged on the base opposite to the folding connection portion, and a lock sheet matching the lock buckle is arranged on the upper cover opposite to the lock buckle.

[0020] In a second aspect, a sealed can is provided, comprising a can body and the plastic sealing cover as described in the first aspect, wherein the plastic sealing cover is used to cover a port of the can body.

[0021] The beneficial effects of adopting the above technical solution are:

[0022] The plastic sealing cover provided by the embodiment of the present invention has an inner sealing member made of elastic material disposed on the inner side wall of the outer cover body, and the inner sealing member can contact with the port of the can body, thereby achieving better cooperation with the can body, improving the sealing effect, and preventing the milk powder inside the can body from getting wet or leaking out. In addition, the outer cover body can be made of plastic with higher hardness, so as to better protect the cover.

[0023] The sealed can provided by the embodiment of the present invention is provided with a boss on the sealing ring of the plastic sealing cover and a groove on the outer wall of the upper part of the can body, which not only facilitates the installation, but also improves the matching degree and sealing performance of the two. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0025] Figure 1 is a schematic structural diagram of a plastic sealing cover provided by an embodiment of the present invention.

[0026] Figure 2 is Figure 1 the bottom view of

[0027] Figure 3 is Figure 2 the sectional view taken along line A-A in

[0028] Figure 4 is Figure 3 the partial enlarged schematic view at position B in

[0029] Figure 5 is a schematic structural diagram of an upper cover provided by an embodiment of the present invention.

[0030] Figure 6 is a schematic structural diagram of a base provided by an embodiment of the present invention.

[0031] Wherein: 1, inner sealing member, 11, sealing ring, 12, extension part, 121, convex block, 13, annular boss, 14, annular reinforcing rib, 2, outer cover body, 3, upper cover, 31, cover top, 32, upper cover wall, 33, inner ring, 34, locking piece, 4, base, 41, lower cover wall, 42, sealing cover, 43, locking buckle. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] To make the objectives, technical solutions and advantages of the present invention more clear, the following describes the invention clearly and completely in conjunction with specific embodiments. It should be understood that the orientation or positional relationships indicated by terms such as "center", "vertical", "horizontal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0033] An embodiment of the present invention provides a plastic sealing cover, as Figures 1-6 shown, which includes: an inner sealing member 1 and an outer cover body 2, and the inner sealing member 1 and the outer cover body 2 are of an integral structure.

[0034] Among them, the outer cover body 2 includes an upper cover 3 and a base 4. The base 4 is hinged to the upper cover 3 through a folding connection part. The upper cover 3 is used to snap onto the base 4, and the outer cover body 2 is used to cover the port of the tank to be sealed;

[0035] The inner sealing member 1 is made of an elastic material and is fixedly arranged on the inner side wall of the outer cover body 2. After the outer cover body 2 covers the tank port, the inner sealing member 1 can cover the outer edge of the tank port and seal the gap between the edge of the tank port and the outer cover body 2. A plurality of such inner sealing members 1 can be provided, and the plurality of inner sealing members 1 are evenly arranged along the inner side wall of the outer cover body 2.

[0036] The manufacturing method of this plastic sealing cover can adopt the following steps: obtain the outer cover body by injection molding, roughen the position on the inner side wall of the outer cover body 2 where the inner sealing member 1 needs to be installed to make it have rough edges and increase the friction force, and then fix the inner sealing member 1 at the rough edges by gluing.

[0037] In the plastic sealing cover provided by the embodiment of the present invention, an inner sealing member 1 made of an elastic material is arranged on the inner side wall of the outer cover body 2. The inner sealing member 1 can contact the tank port, realizing better cooperation with the tank, improving the sealing effect, and preventing the milk powder inside the tank from getting damp or leaking. Moreover, the outer cover body 2 can be made of a plastic with a higher hardness, so as to better protect the lid.

[0038] Regarding the structure of the outer cover body 2, in a possible implementation manner, as Figure 5 and Figure 6As shown, in addition, the upper cover 3 includes: a cover top 31, an inner ring 33, and an upper cover wall 32 surrounding the outer edge of the cover top 31, and the base 4 includes: a lower cover wall 41 and a sealing cover 42, the inner diameter of the sealing cover 42 is equivalent to the outer diameter of the inner ring 33, and in the closed state, the outer wall of the inner ring 33 is tightly attached to the upper inner wall of the sealing cover 42;

[0039] A lock buckle 43 is provided on the base 4 opposite to the folding connection portion, and a lock sheet 34 matching the lock buckle 43 is provided on the upper cover 3 opposite to the lock buckle 43 .

[0040] Of course, the inner cover wall may also be provided with an embedding groove for fixing the can body, and the inner wall of the embedding groove may be provided with a raised belt. The inner layer seal 1 may be arranged on the lower inner wall of the lower cover wall 41. The sealing performance is improved through the joint action of the inner layer seal 1 and the raised belt.

[0041] Among them, the embodiment of the present invention does not specifically limit the materials of the inner seal 1 and the outer cover 2, and it is only necessary to ensure that they meet the requirements. Exemplarily, the material of the inner seal 1 is silicone, TPE (Thermoplastic Elastomer), TPU (Thermoplstic polyurethanes), or LDPE (high pressure-low density polyethylene); the outer cover 2 is made of food-grade plastic with higher hardness, and its material is PP (Polypropylene), PET (Polyethyleneterephthalate), non-toxic PVC (Polyvinyl chloride), PE (Polyethylene).

[0042] It should be noted that, in order to facilitate understanding of the structure of the plastic sealing cover from the accompanying drawings, in the embodiment of the present invention, a schematic diagram obtained by partially cutting the plastic sealing cover is taken as an example for description.

[0043] like Figures 1-4 As shown, the inner sealing member 1 is an annular structure, and the inner sealing member 1 comprises a sealing ring 11 and an extension portion 12;

[0044] The sealing ring 11 is fixed on the inner wall of the outer cover 2 and has an annular structure;

[0045] The extension part 12 is arranged on the upper edge of the sealing ring 11, and is perpendicular to the axial direction of the outer cover 2 and is annular. The extension part 12 is used to contact and cooperate with the tank port after the outer cover 2 covers the tank port. Correspondingly, the base 4 is provided with an annular reinforcing rib 14 for supporting when the extension part 12 contacts the outer wall of the tank port, so as to avoid the situation where the sealing effect cannot be achieved due to deformation of the extension part 12.

[0046] Furthermore, if Figure 4 As shown, the end of the extension portion 12 is provided with a protrusion 121 which is consistent with the side direction of the outer cover body 2 and faces the opening direction of the outer cover body 2. The protrusion 121 can be spoon-shaped. The protrusion 121 is used to cooperate with the outer side wall of the tank body port after the outer cover body 2 covers the tank body port.

[0047] In addition, an annular boss 13 is provided on the side of the sealing ring 11 away from the inner wall of the outer cover body 2. Correspondingly, a circle of grooves matching the annular boss 13 is provided on the upper outer wall of the tank body. After the outer cover body 2 covers the port of the tank body, the boss is inserted into the groove, and the hook formed by the sealing ring 11, the extension part 12 and the protrusion 121 holds the port of the tank body, further improving the sealing effect.

[0048] The embodiment of the present invention also provides a sealed can, which includes the aforementioned plastic sealing cover and a can body, wherein the plastic sealing cover is used to cover the port of the can body. In addition, a circle of grooves for matching with the annular boss 13 is also provided on the upper outer wall of the can body.

[0049] The sealed can provided in the embodiment of the present invention has an inner sealing member 1 made of elastic material on the inner side wall of the outer cover body 2 of the plastic sealing cover so that it contacts the port of the can body, better matches the can body, improves the sealing effect, and prevents the milk powder inside the can body from getting damp or leaking out; a boss is provided on the sealing ring 11 of the plastic sealing cover and a groove is provided on the upper outer wall of the can body, which not only facilitates installation but also improves the fit and sealing of the two.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A plastic sealing cap, characterized in that, It includes: An inner sealing member (1) and an outer cover (2); The outer cover (2) comprises an upper cover (3) and a base (4); the base (4) is hinged to the upper cover (3) via a folding connection portion; the upper cover (3) is used to be buckled with the base (4); and the outer cover (2) is used to cover the port of the tank to be sealed; The inner sealing member (1) is made of an elastic material and is fixedly mounted on the inner side wall of the outer cover (2). After the outer cover (2) covers the tank port, the inner sealing member (1) can cover the outer edge of the tank port and seal the gap between the edge of the tank port and the outer cover (2). The inner sealing member (1) is an annular structure, and comprises a sealing ring (11) and an extension portion (12); Wherein, the sealing ring (11) is fixedly mounted on the inner wall of the outer cover body (2) and has an annular structure; The extension portion (12) is arranged on the upper edge of the sealing ring (11), is perpendicular to the axial direction of the outer cover body (2) and is annular, and the extension portion (12) is used to abut against the tank body port after the outer cover body (2) covers the tank body port; The end of the extension portion (12) is provided with a protrusion (121) which is consistent with the side direction of the outer cover body (2) and faces the opening direction of the outer cover body (2); the protrusion (121) is spoon-shaped and is used to abut against the outer side wall of the tank body port after the outer cover body (2) covers the tank body port; the sealing ring (11), the extension portion (12) and the protrusion (121) form a hook to hold the tank body port; An annular boss (13) is also provided on the side of the sealing ring (11) away from the inner wall of the outer cover body (2). A circle of grooves for matching with the annular boss (13) is provided on the upper outer wall of the body, and after the outer cover body (2) is covered on the port of the tank body, the annular boss (13) is inserted into the groove; An annular reinforcing rib (14) is provided inside the base (4) for supporting the extension portion (12) when it contacts the outer side wall of the tank port.

2. The plastic sealing cap according to claim 1, characterized in that, The sealing ring (11), the extension portion (12), the protrusion (121) and the annular boss (13) are integrally formed.

3. The plastic sealing cap according to claim 1, characterized in that, The inner sealing member (1) and the outer cover body (2) are an integrated structure.

4. The plastic sealing cap according to claim 1, characterized in that, The material of the inner layer sealing component (1) is TPE, TPU or LDPE, and the material of the outer layer cover (2) is PP.

5. The plastic sealing cap according to claim 1, characterized in that, The upper cover (3) comprises: a cover top (31), an inner ring (33), and an upper cover wall (32) surrounding the outer edge of the cover top (31); the base (4) comprises: a lower cover wall (41) and a sealing cover (42); the inner diameter of the sealing cover (42) is equivalent to the outer diameter of the inner ring (33); in a closed state, the outer wall of the inner ring (33) is in close contact with the upper inner wall of the sealing cover (42); and the inner layer sealing member (1) is arranged on the lower inner wall of the lower cover wall (41); A latch (43) is provided on the base (4) opposite to the folding connection part, and a latch piece (34) matching the latch (43) is provided on the upper cover (3) opposite to the latch (43).

6. A sealed can, characterized in that, It includes a tank body and a plastic sealing cover as described in any one of claims 1-5, wherein the plastic sealing cover is used to cover the port of the tank body.

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