Cup lid

Abstract

This utility model relates to a cup lid, addressing the technical problem that existing cup lids of the same type have complex assembly structures between the inner and outer lids, particularly the lack of elastic components such as sealing rings when the inner diameters of the inner and outer lids are generally interlocked by abutting. The cup lid has a sealing element on the outer diameter of the annular groove at the middle end of the inner plug of the inner lid. The external thread of the sealing element on the outer diameter of the inner lid connects with the internal thread at the inner diameter of the stainless steel double-layer cup body. Simultaneously, the sealing element fits into and seals the protruding inner wall opening below the cup opening at the internal thread of the stainless steel double-layer cup body. The key point is that the outer diameter of the inner lid opening has a raised external retaining rib that is lower than the lid opening, and the inner diameter of the outer lid opening has a raised internal retaining rib. The external retaining rib of the inner lid interlocks with and engages with the internal retaining rib of the outer lid, while the lid openings of the inner and outer lids are flush and sealed. The sealing ring at the bottom corner of the outer lid abuts against the outer diameter of the bottom corner of the inner lid.

Description

Technical Field

[0001] This utility model relates to a lid for a thermos cup, and is a type of lid. Background Technology

[0002] A thermos flask generally refers to a water cup with inner and outer layers, most commonly made of stainless steel inner and outer cups. The partition between the inner and outer cups contains a vacuum, gas, liquid, or insulation material. In addition to the double-layered stainless steel structure of the cup body, to improve its sealing effect, this type of thermos flask typically uses an inner plug with a sealing element at the inner end of the lid. The sealing element abuts against the inner wall of the protrusion on the inner diameter of the flask mouth for sealing, while the lid screws into the internal or external threads of the flask mouth for sealing. Such lids are exemplified by Chinese patent application number 201922199484.8, authorized on November 10, 2020, entitled "A Cup Lid and a Thermos Flask with the Lid"; however, the assembly structure between the inner and outer lids of the aforementioned products and similar products is relatively complex, especially since the bottom of the inner and outer lids are generally interlocked by abutting, lacking elastic components such as sealing rings. Summary of the Invention

[0003] To overcome the above-mentioned shortcomings, the purpose of this utility model is to provide a cup lid that solves the technical problem of the complex assembly structure design between the inner and outer lids in existing cup lids of the same type, particularly the lack of elastic components such as sealing rings when the inner diameter bottoms of the inner and outer lids are generally interlocked by abutting. This objective is achieved through the following technical solution.

[0004] A cup lid includes an outer lid, an inner lid, an inner plug, a gasket, and a sealing element. A sealing element is provided on the outer diameter of the annular groove at the end of the inner plug, which is fixedly located in the middle of the inner lid. The inner lid and the inner plug are ultrasonically fused together. The gasket is located on the annular surface of the inner plug at the bottom of the inner lid. Simultaneously, the external thread of the sealing element on the outer diameter of the inner lid connects with the internal thread at the inner diameter of the cup opening of a stainless steel double-layered cup body. The sealing element is fitted into and seals against the protruding inner wall opening below the cup opening at the internal thread of the stainless steel double-layered cup body. The key structural design features a raised external retaining rib on the outer diameter of the inner lid opening, which is lower than the lid opening. A raised internal retaining rib is provided on the inner diameter of the outer lid opening. The external retaining rib of the inner lid interferes with and engages with the internal retaining rib of the outer lid. Simultaneously, the lid openings of the inner lid and outer lid are flush and sealed. The sealing ring at the bottom corner of the outer lid abuts against the outer diameter at the bottom corner of the inner lid. The inner and outer covers are fastened together, causing the sealing ring to deform and further ensuring the stability of the fastening position between the inner and outer covers.

[0005] The inner cover has a notch at at least one side of the outer retaining rib, and the height of the outer retaining rib is aligned with or lower than the height of the inner retaining rib. This structure facilitates airtightness during assembly between the inner and outer covers without affecting the sealing performance or the application of adhesive or ultrasonic welding at the inner retaining rib.

[0006] The inner cover has a raised ring at its bottom. When the inner cover and the inner plug are joined together by ultrasonic welding, the opening of the inner plug fits into the ring fixed to the inner cover. This facilitates further connection and fixation between the inner cover and the inner plug.

[0007] The sealing ring is in the shape of an O-ring or a flat washer. The sealing ring is not limited to a ring structure; it can also be in the form of a gasket or other similar structure.

[0008] Simultaneously, the internal thread at the inner diameter of the inner lid connects with the external thread at the outer diameter of the stainless steel double-walled cup body. A sealing element is then fitted into and seals the protruding inner wall opening below the cup rim at the internal thread of the stainless steel double-walled cup body. The external thread of the sealing element is omitted, and the internal thread at the inner diameter of the cup rim of the stainless steel double-walled cup body is also omitted. This is another method of connecting the internal and external threads of the cup lid.

[0009] This utility model has a reasonable structural design, is easy to manufacture and assemble, and has a wide range of applications; it is suitable for use as a lid for stainless steel thermos cups and for structural improvements of similar products. Attached Figure Description

[0010] Figure 1 This is an exploded structural diagram of the present invention.

[0011] Figure 2 yes Figure 1 A schematic diagram of the assembled three-dimensional structure.

[0012] Figure 3 yes Figure 2 A sectional view of the structure in its usage state.

[0013] Attached figures and their names: 1. Outer cover, 101. Inner retaining rib, 2. Sealing ring, 3. Inner cover, 301. Outer retaining rib, 302. Notch, 303. Ring, 4. Inner plug, 5. Gasket, 6. Sealing element, 7. Stainless steel double-walled cup body. Implementation

[0014] The structure of this utility model will now be further described with reference to the accompanying drawings. For example... Figures 1-3As shown, the cup lid includes an outer lid 1, an inner lid 3, an inner plug 4, a gasket 5, and a sealing element 6. A sealing element is fixedly installed on the outer diameter of the annular groove at the end of the inner plug, located in the middle of the inner lid. The inner lid and the inner plug are ultrasonically fused together. The gasket is located on the annular surface of the inner plug at the bottom of the inner lid. Simultaneously, the external thread of the sealing element in the inner lid connects with the internal thread at the inner diameter of the stainless steel double-layer cup body 7. The sealing element is fitted into and seals the protruding inner wall opening below the cup opening at the internal thread of the stainless steel double-layer cup body. The outer diameter of the inner lid opening has a protruding external retaining rib 301 that is lower than the lid opening. The inner diameter of the outer lid opening has a protruding internal retaining rib 101. The external retaining rib of the inner lid interferes with and engages with the internal retaining rib of the outer lid. Simultaneously, the lid opening of the inner lid and the lid opening of the outer lid are flush and sealed. The sealing ring 2 at the bottom corner of the outer lid abuts against the outer diameter of the bottom corner of the inner lid.

[0015] Furthermore, the inner cover has a notch 302 at at least one side of the outer buckle rib, and the height of the outer buckle rib is aligned with or lower than the height of the inner buckle rib; the inner bottom of the inner cover has a raised ring 303, and when the inner cover and the inner plug are joined together by ultrasonic welding, the plug opening of the inner plug is fitted into the ring fixed to the inner cover; the sealing ring is in the shape of an O-ring or a flat washer.

[0016] According to existing technology, the external thread of the above-mentioned sealing element can also be omitted, and the internal thread at the inner diameter of the cup mouth of the stainless steel double-walled cup body can be omitted; at the same time, the internal thread at the inner diameter of the lid opening is connected to the external thread at the outer diameter of the cup mouth of the stainless steel double-walled cup body, and the sealing element is fitted into and seals the protruding inner wall opening below the cup mouth at the internal thread of the stainless steel double-walled cup body.

[0017] To use, simply slip the lid with the inner stopper onto the cup opening and tighten it.

Claims

1. A cup lid, comprising an outer lid (1), an inner lid (3), an inner plug (4), a gasket (5), and a sealing element (6), wherein the outer diameter of the annular groove at the end of the inner plug, which is fixedly disposed in the middle of the inner lid, is provided with a sealing element; the inner lid and the inner plug are joined together by ultrasonic welding; the gasket is disposed on the annular surface of the inner plug at the bottom of the inner lid; the outer thread of the sealing element in the inner lid is connected to the inner thread at the inner diameter of the cup mouth of the stainless steel double-layer cup body (7); simultaneously, the sealing element is fitted into and seals the inner wall opening protruding below the cup mouth at the inner thread of the stainless steel double-layer cup body; characterized in that... The outer diameter of the inner cover (3) is provided with a raised outer buckle (301) that is lower than the opening of the cover, and the inner diameter of the outer cover (1) is provided with a raised inner buckle (101). The outer buckle of the inner cover passes over and engages with the inner buckle of the outer cover. At the same time, the opening of the inner cover is flush with the opening of the outer cover and sealed. The sealing ring (2) at the bottom corner of the outer cover abuts against the outer diameter at the bottom corner of the inner cover.

2. The cup lid according to claim 1, characterized in that... The inner cover (3) has a notch (302) at at least one side of the outer buckle (301), and the height of the outer buckle is aligned with or lower than the height of the inner buckle (101).

3. The cup lid according to claim 1, characterized in that... The inner cover (3) has a raised ring (303) at the bottom. When the inner cover and the inner plug (4) are joined together by ultrasonic welding, the plug opening of the inner plug is fitted into the ring fixed to the inner cover.

4. The cup lid according to claim 1, characterized in that... The sealing ring (2) is in the shape of an O-ring or a flat washer.

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