Anti-seepage container opening assembly

Abstract

The utility model discloses an anti-seepage container mouth assembly which comprises a bottle mouth which is located on a bottle neck on the top of a bottle body or a barrel body and provided with external threads, an outer cover connected to the bottle mouth in a screwed mode, an inner cover plugged in the bottle mouth and located in the outer cover, and a circle of sunken annular steps arranged on the inner side of the top end of the bottle mouth. The outer diameter of the outer flange of the inner cap is smaller than the diameter of the annular step, so that the inner cap sinks into the bottle neck; a sealing gasket which can hermetically abut against the top surface of the bottle neck and the top surface of the inner cap is arranged on the lower side of the inner top surface of the outer cap; the outer flanging of the inner cover and the annular step form annular line sealing contact; the outer side face of the inner cap and the inner wall face of the bottle neck are in circumferential contact to form sealing connection. A sunken annular step is arranged on the inner side of the top end of the bottle neck, so that the inner cap is arranged below the top surface of the bottle neck and in the bottle neck, and a sealing gasket is arranged on the top end surface of the bottle neck to realize primary sealing; a sealing contact ring is constructed at the outer flanging of the inner cap and the annular step, and a linear contact sealing ring is constructed on the outer side surface of the inner cap and the inner wall surface of the bottle neck, so that a multi-sealing double-cap structure with better sealing performance is formed.

Description

Technical Field

[0001] This utility model relates to liquid container bottle mouth sealing and leak-proof technology, and more particularly to a leak-proof liquid container mouth assembly. Background Technology

[0002] For containers holding corrosive liquids, current bottle caps typically consist of an inner cap and an outer cap. The inner cap usually fits snugly against the bottle neck (the inner opening of the spout). To prevent the inner cap from sinking into the container, it has an outward-flared flange. The outer diameter of this flange is larger than the inner diameter of the spout but smaller than its outer diameter, placing it above the top surface of the spout. The outer cap is screwed onto the spout, pressing the inner cap tightly. However, both the top surface of the spout and the bottom surface of the inner cap's flange have planar tolerances, preventing a perfect seal. Similarly, the inner top surface of the outer cap and the top surface of the inner cap also have planar tolerances, hindering a perfect seal. Furthermore, both the inner and outer caps are made of rigid materials, as is the bottle neck, resulting in poor sealing performance. If the gap between the inner cap and the bottle neck is too large, leakage will occur. The overflowing liquid will seep through the inner cap and into the inner and outer caps, and may even overflow along the threaded connection. If the container contains corrosive substances, it may harm the operator and pose a certain operational risk. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, the technical problem to be solved by this utility model is to provide a leak-proof container opening assembly with a multi-seal double cap and better sealing performance.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a leak-proof container nozzle assembly, which includes a bottle mouth with external threads on the bottleneck of the bottle or barrel at the top, an outer cap screwed onto the bottle mouth, and an inner cap inserted into the bottle mouth and located inside the outer cap. The inner side of the top of the bottle mouth is provided with a recessed annular step. The outer diameter of the outer flange of the inner cap is smaller than the diameter of the annular step, so that the inner cap is recessed into the bottle mouth. The lower side of the inner top surface of the outer cap is provided with a sealing gasket that can seal against the top surface of the bottle mouth and the top surface of the inner cap. The outer flange of the inner cap and the annular step form a circumferential sealing contact. The outer side of the inner cap and the inner wall surface of the bottle mouth have a circumferential contact to form a sealing connection.

[0005] As an improvement to the technical solution of the leak-proof container opening assembly of this utility model, the lower inner corner of the outer flange of the inner cover is chamfered and contacts and seals with the annular step line; the inner corner of the annular step is chamfered and contacts and seals with the outer edge line of the outer flange of the inner cover.

[0006] As an improvement to the technical solution of the leak-proof container opening assembly of this utility model, the height of the ring step is equal to the thickness of the outer flange of the inner cover, so that when the inner cover is inserted into the bottle mouth, the top surface of the inner cover is flush with the top surface of the bottle mouth and the top surface of the inner cover can seal against the sealing gasket, wherein the sealing gasket is a rigid sealing sheet.

[0007] As an improvement to the technical solution of the leak-proof container opening assembly of this utility model, the sealing gasket includes a hard sealing disc located in the middle that can press the top surface of the inner cover, and a soft rubber sealing ring surrounding the sealing disc.

[0008] As an improvement to the technical solution of the leak-proof container opening assembly of this utility model, the inner bottom surface of the outer cover is provided with a continuous or discontinuous annular protrusion, which can press the top surface of the inner cover tightly.

[0009] As an improvement to the technical solution of the seepage-proof container opening assembly of this utility model, the inner cover has a concave bowl shape in the middle, and an inner handle is provided inside the inner cover.

[0010] As an improvement to the technical solution of the leak-proof container opening assembly of this utility model, the inner handle has a pull ring that can be inserted into a finger and a connecting part that connects the pull ring to the concave inner side.

[0011] As an improvement to the technical solution of the seepage-proof container opening assembly of this utility model, the lower side of the outer flange of the inner cover is provided with an overflow-stopping seal with an inverted triangular cross section.

[0012] The beneficial effects of this utility model are as follows: by setting a recessed annular step on the inner edge of the top of the bottle mouth and reducing the outer diameter of the outer flange of the inner cap, the inner cap can be set below the top surface of the bottle mouth and inside the bottle mouth, so that a sealing gasket can be set on the inner top surface of the outer cap to achieve a seal with the top surface of the bottle mouth; and an annular sealing contact ring is constructed at the outer flange of the inner cap and the annular step, and another annular contact sealing ring is constructed on the lower outer side of the inner cap and the inner wall surface of the bottle mouth, thereby forming a multi-seal contact ring / ring structure, so that the leak-proof container mouth assembly forms a multi-seal double cap structure with better sealing performance. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of a leak-proof container opening assembly according to the present invention.

[0014] Figure 2 for Figure 1 The diagram shows a three-dimensional structure of the cap of the leak-proof container assembly.

[0015] Figure 3 for Figure 2 The diagram shows a longitudinal cross-sectional view of the bottle cap.

[0016] Figure 4 for Figure 1 The diagram shows a longitudinal cross-sectional view of the leak-proof container inlet assembly.

[0017] Figure 5 for Figure 1 The diagram shows a semi-sectional three-dimensional structure of the leak-proof container port assembly.

[0018] Figure 6 This is a longitudinal cross-sectional structural diagram of an optimized solution for an anti-seepage container port assembly according to the present invention.

[0019] Figure 7 This is a three-dimensional structural diagram of another embodiment of the leak-proof container opening assembly of this utility model. Detailed Implementation

[0020] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0021] like Figures 1-5 As shown, this utility model discloses a leak-proof container nozzle assembly, which includes a bottle mouth 12 with external threads on the bottleneck 11 located at the top of the bottle or barrel, an outer cap 21 screwed onto the bottle mouth 12, and an inner cap 31 inserted into the bottle mouth 12 and located inside the outer cap 21. The inner side of the top of the bottle mouth 12 is provided with a recessed annular step 13. The outer diameter of the outer flange 32 of the inner cap 31 is smaller than the diameter of the annular step 13, so that the inner cap 31 is recessed into the bottle mouth 12. The lower side of the inner top surface of the outer cap 21 is provided with a sealing gasket 22 that can seal against the top surface of the bottle mouth 12 and the top surface of the inner cap. The outer flange of the inner cap and the annular step form a circumferential sealing contact. The outer side of the inner cap and the inner wall surface of the bottle mouth have a circumferential contact to form a sealing connection. By setting a recessed annular step on the inner edge of the top of the bottle mouth 12 and reducing the outer diameter of the outer flange 32 of the inner cap, the inner cap 31 can be positioned below and inside the top surface of the bottle mouth 12. This allows the sealing gasket 22 to be placed on the inner top surface of the outer cap to achieve a seal with the top surface of the bottle mouth 12. A ring-shaped sealing contact ring is constructed at the outer flange and the annular step of the inner cap, and another ring-shaped contact sealing ring is constructed on the lower outer side of the inner cap and the inner wall of the bottle mouth. This forms a structure with multiple sealing contact rings / circles, resulting in a multi-seal double cap structure with better sealing performance for the leak-proof container mouth assembly.

[0022] Among them, such as Figure 6 As shown, the lower inner corner of the outer flange 32 of the inner cap 31 is chamfered and makes line contact with the annular step 13 for sealing; the inner corner of the annular step 13 is chamfered and makes line contact with the outer edge of the outer flange 32 of the inner cap for sealing. This structure creates two annular line contact sealing rings, which provides multiple guarantees for the leak-proof performance of the bottle mouth structure with multiple sealing structures, resulting in better sealing performance.

[0023] Among them, such as Figure 4 , Figure 6 As shown, the height of the annular step 13 is equal to the thickness of the outer flange 32 of the inner cap 31, so that when the inner cap 31 is inserted into the bottle mouth 12, the top surface of the inner cap 31 is flush with the top surface of the bottle mouth 12, and the top surface of the inner cap 31 can seal against the sealing gasket 22. This allows the sealing gasket 22 to press against the top surface of the inner cap 31 to form a seal, preventing the liquid inside from leaking out and overflowing into the inner cavity of the inner cap 31. The sealing gasket 22 is a rigid sealing sheet that can cover the top surface of the inner cap 31 and the top surface of the bottle mouth 12 to seal the gap between the inner cap 31 and the bottle mouth 12. More importantly, the rigid sealing sheet can provide sufficient pressure to press the inner cap 31 tightly, leaving no opportunity for cushioning, thereby preventing the inner cap 31 from being pushed upward by the pressure inside the container / bottle and causing leakage.

[0024] Or, such as Figure 7 As shown, the sealing gasket 22 includes a rigid sealing disc located in the center that can press against the top surface of the inner cover 31, and a soft rubber sealing ring 22a surrounding the sealing disc. The rigid sealing disc can effectively transmit the pressure between the outer cover 21 and the inner cover 31, thereby pressing the inner cover 31 and preventing leakage caused by the airflow impact pressure generated by internal shaking and bumping. Alternatively, as Figure 6 As shown, the inner bottom surface of the outer cover 21 is provided with a continuous or discontinuous annular protrusion 23. The annular protrusion 23 can press the top surface of the inner cover 31. The pressure between the outer cover 21 and the inner cover 31 is transmitted through the annular protrusion 23, thereby pressing the inner cover 31 and preventing the inner cover from being pushed upward and backward by the airflow impact pressure caused by the internal shaking and bumping, which would cause leakage.

[0025] Better, such as Figure 4 , Figure 5 As shown, the inner cover 31 has a concave bowl shape in the middle, and the inner cover 31 is provided with an inner handle 33 inside, which makes it easy to remove the inner cover 31 after opening the cover. This allows the inner cover 31 to be interference-fitted with the inner side of the bottle mouth 12 to form a better sealing structure and achieve double sealing.

[0026] More preferably, the inner handle 33 has a pull ring 36 through which a finger can be inserted, and a connecting part 35 connecting the pull ring and the recessed inner side. The connecting part is vertically connected to the inner bottom surface of the inner cover 31, so that the inner cover can be pulled up more effectively.

[0027] Furthermore, the lower side of the outer flange 32 of the inner cover 31 is provided with an overflow-stopping seal with an inverted triangular cross section (not shown in the figure). The lower edge of the overflow-stopping seal is pressed against the stepped surface of the ring step 13 to form a sealing barrier, adding an extra layer of anti-leakage sealing barrier.

[0028] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A liquid-tight container mouth assembly comprising a bottle or a barrel having a bottle neck with external threads at the top of the bottle or barrel body, an outer cap screwing onto the bottle neck, an inner cap inserted into the bottle neck and located within the outer cap, characterized in that: The top end of the bottle nozzle is provided with a ring ladder with a downward sinking, the outer diameter of the outer turning edge of the inner cover is less than the diameter of the ring ladder so that the inner cover sinks into the inside of the bottle nozzle, the inner top surface of the outer cover is provided with a sealing gasket which can seal against the top surface of the bottle nozzle and the top surface of the inner cover; the outer turning edge of the inner cover forms a ring line sealing contact with the ring ladder; the outer side surface of the inner cover has a line contact with the inner wall surface of the bottle nozzle to form a sealing connection; the lower inner corner of the outer turning edge of the inner cover is provided with a chamfer and forms a line contact sealing with the ring ladder; the inner corner of the ring ladder is provided with a chamfer and forms a line contact sealing with the outer edge of the outer turning edge of the inner cover.

2. The container closure assembly of claim 1 wherein: The height of the ring ladder is equal to the thickness of the outer turning edge of the inner cover so that when the inner cover is inserted into the bottle nozzle, the top surface of the inner cover is flush with the top end surface of the bottle nozzle and the top surface of the inner cover can seal against the sealing gasket, the sealing gasket is a hard sealing piece.

3. The container closure assembly of claim 1 wherein: The sealing gasket includes a hard sealing circular piece in the middle which can press the top surface of the inner cover, and a soft sealing ring surrounding the sealing circular piece.

4. The container closure assembly of claim 1 wherein: The inner bottom surface of the outer cover is provided with a continuous or discontinuous ring convex edge which can press the top surface of the inner cover.

5. The container closure assembly of claim 1 wherein: The middle part of the inner cover is a concave bowl type, and the inside of the inner cover is provided with an inner pull handle.

6. The container closure assembly of claim 5 wherein: The inner pull handle has a pull ring which can be inserted into a finger, and a connecting part connecting the pull ring and the lower concave inner side surface.

7. The container closure assembly of claim 1 wherein: The lower surface of the outer turning edge of the inner cover is provided with a cross section triangular shaped overflow stopping edge.

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