Vacuum cup

Abstract

The utility model discloses a vacuum cup, belongs to the technical field of vacuum cups, and aims at overcoming the defect that the sealing effect between a cup body and a shell of an existing vacuum cup is poor. The vacuum cup comprises a shell and an inner container, the inner container is arranged in the shell, a heat preservation cavity is formed between the inner container and the shell, the outer wall of the inner container is provided with a first external thread, and the inner wall of the upper end of the shell is provided with a first internal thread matched with the first external thread. And a sealing structure is arranged at the joint of the first external thread and the first internal thread. The multi-tooth meshing characteristic of the threads disperses impact of external force, the deformation resistance is improved, a certain sealing effect is achieved through thread matching, and the sealing performance of the heat preservation cavity can be stably guaranteed through matching of a sealing structure.

Description

Technical Field

[0001] This utility model belongs to the technical field of thermos cups and relates to a thermos cup with good sealing performance. Background Technology

[0002] Chinese patent literature discloses a utility model patent for a vacuum insulated cup, authorized announcement number CN214387069U, which includes a cup body and an outer shell. The outer shell is fitted onto the outside of the cup body, and an inner cavity is formed between the cup body and the outer shell. A sealing ring is also installed at the contact point between the top of the outer shell and the cup body. An inner protrusion is provided at the center of the bottom of the outer shell. An exhaust chamber is provided at the lower end of the inner protrusion. An exhaust hole for connecting the exhaust chamber and the inner cavity is provided at the upper end of the exhaust chamber. A one-way air outlet component is installed in the exhaust chamber.

[0003] The aforementioned thermos cups rely solely on an inverted L-shaped sealing ring to seal the connection between the cup body and the outer shell. Under extreme temperature differences or external impacts, tiny gaps can easily form, allowing air to seep in and damage the vacuum layer. Furthermore, when washing the cup, foreign objects can easily enter the inner cavity. Summary of the Invention

[0004] This utility model addresses the problems existing in the prior art by proposing a thermos cup, aiming to overcome the defect of poor sealing effect between the cup body and the outer shell of the existing thermos cup.

[0005] This utility model is implemented as follows:

[0006] A thermos cup includes an outer shell and an inner liner, the inner liner being placed inside the outer shell, and a heat-insulating cavity being formed between the inner liner and the outer shell. The inner liner has a first external thread on its outer wall, and the upper end of the outer shell has a first internal thread that engages with the first external thread. A sealing structure is provided at the connection between the first external thread and the first internal thread.

[0007] The outer shell is made of plastic, the inner liner is made of glass, the outer surface of the inner liner is coated with a nano-indium tin oxide low-emissivity coating, the outer shell is transparent, and the outer surface of the inner liner has markings.

[0008] The sealing structure is a thermomelted weld joint between the first internal thread and the first external thread.

[0009] The bottom of the outer casing is provided with an air extraction sealing point.

[0010] The upper end of the outer shell has a sealing groove, and the sealing structure is a sealing ring installed in the sealing groove, which abuts against the inner liner.

[0011] The thermos cup includes a lid, the inner liner includes a body and a connecting part connected to the upper end of the body, the first external thread is located at the upper end of the body, the connecting part has a second external thread, and the lid has a second internal thread that engages with the second external thread.

[0012] The lower end of the cup lid abuts against the sealing ring.

[0013] The cup lid includes an outer lid and an inner lid that are fixedly connected to each other, and there is a cavity between the outer lid and the inner lid.

[0014] The inner wall of the inner cover is provided with a threaded layer, and the second internal thread is located on the threaded layer. The hardness of the threaded layer is less than that of the inner cover and the outer cover.

[0015] The inner cover has a downward-facing recessed cavity, and a sealing gasket is provided at the top of the recessed cavity. The upper end of the connecting part is embedded in the recessed cavity and abuts against the sealing gasket, and the upper end of the threaded layer abuts against the sealing gasket.

[0016] Both the threaded layer and the sealing gasket are made of silicone, and the inner cover is made of food-grade stainless steel.

[0017] The present invention has the following beneficial effects: the multi-tooth meshing characteristics of the thread disperse the impact of external force and improve the resistance to deformation. The thread fit also has a certain sealing effect. With the sealing structure, the sealing performance of the insulation cavity can be guaranteed relatively stably. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the exploded structure of the thermos cup in Example 1;

[0019] Figure 2 This is a cross-sectional view of the thermos cup from Example 1.

[0020] Figure 3 for Figure 2 A magnified view of part A in the middle;

[0021] Figure 4 This is a cross-sectional view of the thermos cup in Example 2;

[0022] Figure 5 This is a cross-sectional view of the thermos cup in Example 3;

[0023] Figure 6 for Figure 5 A magnified view of part B in the middle.

[0024] Figure labeling: 100, outer shell; 110, first internal thread; 120, hot melt welding position; 130, vent sealing point; 140, sealing ring; 200, inner liner; 210, connecting part; 211, second external thread; 220, liner body; 221, first external thread; 300, insulation cavity; 400, cup lid; 410, outer cover; 420, inner cover; 430, threaded layer; 431, second internal thread; 440, sealing gasket; 450, cavity; 460, recessed cavity. Detailed Implementation

[0025] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, so as to make the technical solution of this utility model easier to understand and master. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model. Example

[0026] This embodiment provides a thermos cup, such as Figure 1-3 As shown, the device includes an outer shell 100 and an inner liner 200. The inner liner 200 is placed inside the outer shell 100. A heat-insulating cavity 300 is provided between the inner liner 200 and the outer shell 100. The outer wall of the inner liner 200 has a first external thread 221. The inner wall of the upper end of the outer shell 100 has a first internal thread 110 that mates with the first external thread 221. A sealing structure is provided at the connection between the first external thread 221 and the first internal thread 110.

[0027] Furthermore, the outer shell 100 is a plastic shell, and the inner liner 200 is a glass liner, specifically a single layer of high borosilicate glass. The glass liner eliminates the risk of metal migration. The plastic shell 100 uses a threaded structure to disperse the impact force into a circumferential shear force rather than an axial impact force. The combination of the plastic shell, glass liner, and threaded seal complements the elastic cushioning of the plastic with the rigid support of the glass, reducing the risk of breakage of the thermos and leakage from the insulation cavity 300. The outer shell 100 is transparent, and the outer surface of the inner liner 200 has markings, which may be scale lines and / or a logo.

[0028] The inner liner 200, made of single-layer high borosilicate glass, is heat-resistant to temperatures above 600℃, with no heavy metal leaching or chemical coatings, making it safe for holding liquids such as tea, coffee, breast milk, and acidic fruit juices. The single-layer glass inner liner 200, combined with the PC / PETG transparent outer shell 100, significantly reduces weight compared to traditional double-layer glass, greatly improving portability. The insulation cavity 300 isolates heat conduction and convection, extending heat retention time while preventing rapid heat transfer to the outer shell 100, avoiding burns. The fully transparent outer shell 100 fully displays the high-temperature etched scales on the outer surface of the inner liner 200 and the state of the contents, supporting precise volume control.

[0029] like Figure 3As shown, the sealing structure is the thermoplastic welded joint 120 between the first internal thread 110 and the first external thread 221. High-frequency vibration energy or a high-energy beam is applied to the contact interface between the outer shell 100 and the inner liner 200 using laser or ultrasonic processes, causing the plastic material to partially melt and penetrate into the microscopic pores of the glass threads. After cooling, a molecular-level bonding layer is formed, i.e., the thermoplastic welded joint 120. The rigid sealing layer formed by thermoplastic welding has no risk of elastic deformation, and the welding interface can achieve zero-gap bonding through process parameter control, completely blocking the air permeation path. The insulation cavity 300 is a vacuum cavity 450, ensuring the long-term stability of the vacuum cavity 450 and extending the service life of the thermos. The threaded fit provides mechanical preload, and the welded layer enhances the interface bonding force through material fusion, making the outer shell 100 and the inner liner 200 form a near-integrated structure, significantly improving impact resistance and sealing performance. In other optional embodiments, the insulation cavity 300 may not be a vacuum cavity 450, for example, it may be an atmospheric pressure chamber. In other alternative embodiments, a sealing filler may also be filled between the first internal thread 110 and the first external thread 221.

[0030] like Figure 1-3 As shown, the thermos cup includes a lid 400, and an inner liner 200 including a body 220 and a connecting portion 210 connected to the upper end of the body 220. A first external thread 221 is located at the upper end of the body 220. The connecting portion 210 has a second external thread 211, and the lid 400 has a second internal thread 431 that engages with the second external thread 211. The lid 400 includes an outer cover 410 and an inner cover 420 fixedly connected to each other. A cavity 450 exists between the outer cover 410 and the inner cover 420, serving as heat insulation. A threaded layer 430 is provided on the inner wall of the inner cover 420. The second internal thread 431 is located on the threaded layer 430. The hardness of the threaded layer 430 is less than that of the inner cover 420 and the outer cover 410, facilitating a certain deformation of the threaded layer 430 to achieve a sealing fit with the connecting portion 210. The inner cover 420 has a downward-facing recess 460. A sealing gasket 440 is provided at the top of the recess 460. The upper end of the connecting portion 210 is embedded in the recess 460 and abuts against the sealing gasket 440. The upper end of the threaded layer 430 abuts against the sealing gasket 440. The threaded layer 430 serves to fix the sealing gasket 440. The sealing gasket 440, together with the threaded layer 430, forms a multiple seal for the opening of the inner liner 200, preventing leakage. Both the threaded layer 430 and the sealing gasket 440 are made of silicone. The inner cover 420 is made of food-grade stainless steel. In other optional embodiments, the inner cover 420 can also be made of other materials that do not leach toxins at high temperatures, preventing contamination of the cup rim and beverage.

[0031] The inner liner 200, made of a single layer of glass, and the outer shell 100, made of transparent plastic, are mechanically screwed together in a vacuum environment and simultaneously sealed by heat fusion welding, so that the heat insulation cavity 300 is in a vacuum state. Vacuum does not specifically refer to absolute vacuum, but includes a negative pressure state relative to atmospheric pressure within the heat insulation cavity 300. The outer surface of the inner liner 200 is coated with a nano-indium tin oxide low-emissivity coating to reduce heat radiation.

[0032] This embodiment innovatively designs a fully transparent, high-impact insulated cup, employing a composite structure of a single-layer high borosilicate glass inner liner 200 and a transparent PC / PETG outer shell 100. Through a dual sealing process of mechanical threaded connection and laser / ultrasonic hot-melt welding, combined with an insulated cavity 300, it achieves improved heat preservation performance, enhanced impact resistance, and reduced weight. The outer surface of the inner liner 200 is etched with high-temperature resistant permanent graduations and coated with a nano-indium tin oxide low-emissivity coating. Combined with a fully transparent and visible design, it ensures zero heavy metal leaching and chemical safety while supporting real-time monitoring of beverage status and frequent cleaning needs for acidic beverages, hot drinks, and infant scenarios, completely solving the technical pain points of traditional products. Example

[0033] The difference between this embodiment and Embodiment 1 lies in the method of vacuum treatment of the insulation cavity 300. Specifically, as follows: Figure 4 As shown, the bottom of the outer casing 100 is provided with a vacuum sealing point 130. Before vacuuming, the bottom of the outer casing 100 has a vacuum hole. After vacuuming, the vacuum hole is sealed by hot pressing or adhesive sealing process to form the vacuum sealing point 130, so that the vacuum hole is sealed.

[0034] The other structures in this embodiment are the same as in Embodiment 1. Example

[0035] The difference between this embodiment and Embodiment 1 lies in the sealing structure.

[0036] Specifically, such as Figure 5 , 6 As shown, the upper end of the outer shell 100 has a sealing groove, and the sealing structure is a sealing ring 140 installed in the sealing groove. The sealing ring 140 is made of silicone and abuts against the inner liner 200. The lower end of the cup lid 400 abuts against the sealing ring 140. The sealing ring 140 is deformed by the cup lid 400, which allows it to fit more tightly against the sealing groove and the inner liner 200, resulting in a better sealing effect. In this embodiment, the outer shell 100 and the inner liner 200 are detachably fixedly connected, and the heat preservation cavity 300 does not require vacuum treatment.

[0037] The other structures in this embodiment are the same as in Embodiment 1.

Claims

1. A thermos cup, comprising an outer shell (100) and an inner liner (200), wherein the inner liner (200) is disposed within the outer shell (100), and a heat-insulating cavity (300) is provided between the inner liner (200) and the outer shell (100), characterized in that, The outer wall of the inner liner (200) has a first external thread (221), and the inner wall of the upper end of the outer shell (100) has a first internal thread (110) that mates with the first external thread (221). A sealing structure is provided at the connection between the first external thread (221) and the first internal thread (110).

2. The thermos cup according to claim 1, characterized in that, The outer shell (100) is a plastic shell, the inner liner (200) is a glass liner, the outer surface of the inner liner (200) is coated with a nano-indium tin oxide low-emissivity coating, the outer shell (100) is a transparent shell (100), and the outer surface of the inner liner (200) has markings.

3. The thermos cup according to claim 1, characterized in that, The sealing structure is a heat-fusion weld position (120) between the first internal thread (110) and the first external thread (221).

4. The thermos cup according to claim 1, characterized in that, The bottom of the outer casing (100) is provided with an air extraction sealing point (130).

5. The thermos cup according to claim 1, characterized in that, The upper end of the outer shell (100) has a sealing groove, and the sealing structure is a sealing ring (140) installed in the sealing groove, the sealing ring (140) abutting against the inner liner (200).

6. The thermos cup according to claim 1, characterized in that, The thermos cup includes a lid (400), and the inner liner (200) includes a liner (220) and a connecting part (210) connected to the upper end of the liner (220). The first external thread (221) is located at the upper end of the liner (220), and the connecting part (210) has a second external thread (211). The lid (400) has a second internal thread (431) that is engaged with the second external thread (211).

7. The thermos cup according to claim 5, characterized in that, The thermos cup includes a lid (400), the lower end of which abuts against the sealing ring (140).

8. The thermos cup according to claim 6, characterized in that, The cup lid (400) includes an outer lid (410) and an inner lid (420) that are fixedly connected to each other, and there is a cavity (450) between the outer lid (410) and the inner lid (420).

9. The thermos cup according to claim 8, characterized in that, The inner wall of the inner cover (420) is provided with a threaded layer (430), and the second internal thread (431) is located on the threaded layer (430). The hardness of the threaded layer (430) is less than that of the inner cover (420) and the outer cover (410).

10. The thermos cup according to claim 9, characterized in that, The inner cover (420) has a downward-facing recess (460), and a sealing gasket (440) is provided on the top of the recess (460). The upper end of the connecting part (210) is embedded in the recess (460) and abuts against the sealing gasket (440). The upper end of the threaded layer (430) abuts against the sealing gasket (440). The threaded layer (430) and the sealing gasket (440) are both made of silicone, and the inner cover (420) is made of food-grade stainless steel.

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