Composite inner container and vacuum cup

Abstract

The utility model discloses a composite liner, which relates to the technical field of vacuum cups and comprises an inner layer and an outer layer, a vacuum layer is formed between the inner layer and the outer layer, the inner layer is provided with an open end and a closed end, a first concave part which is concave towards an inner cavity of the inner layer is formed on the inner layer close to the open end, and a second concave part is formed on the outer layer close to the closed end. A second concave part which is concave towards the first concave part is formed in the part, flush with the first concave part, of the outer layer, so that a gap between the inner layer and the outer layer is reduced. The sealing structure has the advantage of being good in sealing performance.

Description

Technical Field

[0001] The utility model relates to the technical field of thermos cups, in particular to a composite liner and a thermos cup. Background Art

[0002] Thermos cups are commonly used daily necessities that can store water or other liquids in a warm state. Existing thermos cups are usually made of ceramic or stainless steel with a vacuum layer, with a heat-insulating cover on the top that is tightly sealed. The vacuum layer can delay heat dissipation to achieve the effect of heat preservation. The inner liner of the existing thermos cup is made of stainless steel, which has the phenomenon of heavy metal precipitation. Long-term use will affect the taste of the beverage and easily cause the beverage to deteriorate. The beverage will also gradually corrode the stainless steel, causing the inner liner to break, thus affecting the life of the thermos cup.

[0003] Therefore, some thermos cups with composite liner have appeared on the market. The composite liner is made of different metal materials, such as a thinner titanium inner layer and a stainless steel metal layer wrapped on the outside. The two layers of metal form a composite liner with better performance. Titanium metal is corrosion-resistant and no heavy metal precipitation occurs, which will not affect human health.

[0004] In the related art, such composite liner is used to expel the air between the two layers of liner by spinning or expanding, etc. However, in actual production, it is often impossible to completely expel the air between the two layers of metal, and the remaining air will affect the sealing of the double-layer liner. Utility Model Content

[0005] The utility model aims to solve one of the technical problems in the related art to a certain extent. To this end, the utility model provides a composite liner and a thermos cup, which have the advantage of good sealing performance.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A composite liner comprises an inner layer and an outer layer, wherein a vacuum layer is formed between the inner layer and the outer layer, the inner layer has an open end and a closed end, the inner layer is formed with a first recessed portion recessed toward an inner cavity of the inner layer adjacent to the open end, and a second recessed portion recessed toward the first recessed portion is formed at a portion of the outer layer flush with the first recessed portion to reduce a gap between the inner layer and the outer layer.

[0008] In the present application, the composite liner includes an inner layer and an outer layer, a first recess is formed on the inner layer, and a second recess is formed on the outer layer. By making the second recess close to the first recess, the distance between the first recess and the second recess can be reduced, thereby reducing the volume of air between the inner layer and the outer layer near the opening end, thereby improving the sealing of the composite liner.

[0009] Optionally, the distance between the first recess and the second recess is 0-5 mm.

[0010] Optionally, the second recess is configured as an arc segment, and both the upper end and the lower end of the arc segment are tightly matched with the first recess.

[0011] Optionally, the second recess is configured to have a shape consistent with that of the first recess and to fit tightly with the first recess.

[0012] Optionally, the first recess includes at least one group of inclined sections and straight sections arranged sequentially, and the inclined sections are inclined in a direction away from the outer layer.

[0013] Optionally, a sealing step is formed between each group of the inclined sections and the straight sections.

[0014] Optionally, one end of the outer layer close to the closed end is constructed to be open and extends beyond the bottom surface of the closed end, a gap is provided between the closed end and the outer layer, and a bottom seal is provided in the gap.

[0015] Optionally, the bottom cover includes a top wall fixedly connected to the closed end and a side wall tightly matched with the outer layer.

[0016] Optionally, the closed end is recessed toward the open end to form an arc portion, a portion of the top wall corresponding to the position of the arc portion is recessed toward the closed end, and a distance between the closed end and the top wall is 0 to 4 mm.

[0017] Optionally, the radius of the arc portion is 0 to 4 mm.

[0018] In addition, the utility model also provides a thermos cup, comprising an outer shell and an inner liner, wherein the inner liner comprises any one of the composite inner liner described above. The reasoning process of the beneficial effects of the thermos cup provided by the utility model and the composite inner liner described above is similar, and will not be repeated here.

[0019] These features and advantages of the utility model will be disclosed in detail in the following specific embodiments and drawings. The best implementation or means of the utility model will be fully presented in conjunction with the drawings, but it is not a limitation of the technical solution of the utility model. In addition, these features, elements and components appearing in each of the following texts and drawings are multiple, and are marked with different symbols or numbers for convenience, but all represent components with the same or similar structure or function. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The utility model is further described below in conjunction with the accompanying drawings:

[0021] Figure 1 This is a schematic diagram of the structure of the thermos cup in the utility model;

[0022] Figure 2 for Figure 1 The enlarged schematic diagram of point A in the middle;

[0023] Figure 3 for Figure 1 The enlarged schematic diagram of point B in the middle;

[0024] Figure 4 This is another structural schematic diagram of the composite liner in the utility model.

[0025] Among them, 1. liner; 11. inner layer; 111. open end; 112. first recess; 1121. straight section; 1122. inclined section; 1123. sealing step; 113. closed end; 1131. arc portion; 12. outer layer; 121. second recess; 13. vacuum layer; 14. bottom cover; 141. top wall; 142. side wall; 2. outer shell. DETAILED DESCRIPTION

[0026] The following is a detailed description of embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments in the implementation manner are intended to be used to explain the present invention and should not be construed as limiting the present invention.

[0027] References in this specification to "one embodiment" or "an example" or "an example" mean that a particular feature, structure, or characteristic described in conjunction with the embodiment itself may be included in at least one embodiment of the present patent disclosure. The appearance of the phrase "in one embodiment" in various places in the specification does not necessarily refer to the same embodiment.

[0028] Example:

[0029] A composite liner, mainly used in thermos cups, such as Figure 1 and Figure 2 As shown, it includes an inner layer 11 and an outer layer 12, a vacuum layer 13 is formed between the inner layer 11 and the outer layer 12, the inner layer 11 has an open end 111 and a closed end 113, the inner layer 11 is formed with a first recess 112 recessed toward the inner cavity of the inner layer 11 adjacent to the open end 111, and the outer layer 12 is formed with a second recess 121 recessed toward the first recess 112 at a portion flush with the first recess 112 to reduce the gap between the inner layer 11 and the outer layer 12.

[0030] In the present embodiment, a composite liner 1 with a double-layer structure is provided, which includes an inner layer 11 and an outer layer 12 sleeved outside the inner layer 11, and a sealed vacuum layer 13 is formed between the inner layer 11 and the outer layer 12. The existence of the vacuum layer 13 can effectively reduce the transfer of heat, so that the inner liner 1 has good thermal insulation performance. The inner layer 11 has an open end 111 and a closed end 113 so that the inner liner 1 can carry beverages, and the open end 111 serves as the mouth of the subsequent thermos cup, which is convenient for users to drink. The inner layer 11 is formed with a first recessed portion 112 recessed toward the central axis of the inner layer 11 adjacent to the open end 111, and specifically, the first recessed portion 112 is located below the open end 111. The provision of the first recessed portion 112 can enhance the mechanical strength of the inner layer 11 and improve the sealing effect between the subsequent inner liner 1 and the cup cover. The distance between the first recess 112 and the second recess 121 is 0 to 5 mm. By bringing the second recess 121 closer to the first recess 112, the distance between the first recess 112 and the second recess 121 can be reduced, thereby reducing the volume of air between the inner layer 11 and the outer layer 12 near the opening end 111, thereby improving the sealing performance of the composite liner 1.

[0031] In this embodiment, the shapes of the inner layer 11 and the outer layer 12 are both roughly cylindrical. The cylindrical liner 1 is easy to manufacture and can maximize the heat preservation effect, ensuring that hot water or cold drinks are evenly distributed. At the same time, its simple structure is also easy to clean. In other embodiments, the shape of the inner layer 11 and the outer layer 12 can also be conical. The bottom of the conical liner 1 is narrow and the top is wide, which makes it easier for the user to touch the liquid at the bottom of the cup when drinking, especially when the amount of liquid is small. At the same time, the conical design can also reduce the amount of materials used to a certain extent and reduce costs. The shape of the inner layer 11 and the outer layer 12 can also be curved. The curved liner 1 design is more aesthetically pleasing and can enhance the overall appearance of the thermos cup. Specifically, it can include soft curves or more distinctive wave shapes to attract consumers' attention.

[0032] In addition, in this embodiment, the inner layer 11 and the outer layer 12 are both integrated structures, with good sealing and simple processing. The inner layer 11 is made of titanium metal, which has good corrosion resistance and no heavy metal precipitation. The outer layer 12 is made of low-cost metals such as stainless steel or aluminum. Stainless steel has good corrosion resistance and can resist erosion by water and other liquids, thereby maintaining the long-term use of the thermos cup. The appearance of stainless steel is smooth and bright, easy to clean, and can maintain the appearance quality for a long time.

[0033] In addition, in this embodiment, the second recess 121 is disposed around the inner layer 11, that is, the second recess 121 is disposed on the entire circumference of the outer layer 12. In other embodiments, the second recess 121 may also be disposed on only a portion of the circumference of the outer layer 12.

[0034] The second recess 121 is configured as an arc segment, and both the upper end and the lower end of the arc segment are tightly matched with the first recess 112 .

[0035] As a possible structure, the second recess 121 is constructed as an arc segment, which is recessed toward the first recess 112, thereby reducing the gap between the first recess 112 and the second recess 121, that is, reducing the trapped air between the first recess 112 and the second recess 121, and improving the sealing of the inner liner 1. In this structure, except for the upper and lower ends of the arc segment, which are tightly matched with the first recess 112 by welding or the like (that is, the spacing is 0), the rest of the arc segment has a gap of less than 5 mm and greater than 0 with the first recess 112. In addition, the shape of the arc segment makes the second recess 121 more stable in structure. Compared with the straight segment, the arc segment has better structural support, can resist external pressure or impact, and ensure the stability of the inner liner 1 during use.

[0036] The second recess 121 is configured to have a shape consistent with that of the first recess 112 and to fit tightly with the first recess 112 .

[0037] As another possible structure, Figure 4 As shown, the second recess 121 is configured to be consistent in shape with the first recess 112 and fits the outer surface of the first recess 112, so that the first recess 112 and the second recess 121 match each other in structure, forming a perfect docking. This docking not only enhances the overall structural stability of the inner liner 1, but also effectively reduces the trapped air in the inner liner 1.

[0038] The first recess 112 includes at least one group of sequentially arranged inclined sections 1122 and straight sections 1121 , and the inclined sections 1122 are inclined in a direction away from the outer layer 12 .

[0039] In this embodiment, the inclined section 1122 is adjacent to the straight section 1121 and is integrally arranged. The inclined section 1122 is inclined in a direction away from the outer layer 12, so that the first recess 112 is in an overall inward state. The setting of the first recess 112 can enhance the mechanical strength of the inner layer 11 and improve the subsequent sealing effect between the inner liner 1 and the cup cover. Specifically, this embodiment includes two groups of inclined sections 1122 and straight sections 1121. The size, angle, position and other parameters of the inclined section 1122 and the straight section 1121 need to be optimized and designed according to specific usage requirements and manufacturing processes. To ensure that it can meet the aesthetics and durability requirements of the product while ensuring the performance of the inner liner 1.

[0040] A sealing step 1123 is formed between each set of inclined sections 1122 and straight sections 1121 .

[0041] The inclined section 1122 and the straight section 1121 are adjacent to each other. Since the inclined section 1122 is inclined relative to the straight section 1121, a step is formed between the inclined section 1122 and the straight section 1121, namely the sealing step 1123. When the cup cover is extended into the inner liner 1, the sealing ring on the cup cover abuts against the sealing step 1123, and the resistance encountered by heat in the transfer process increases, thereby slowing down the heat loss rate. Strengthen the sealing effect between the cup cover and the inner liner 1 and the heat preservation effect of the thermos cup. In addition, the design of the sealing step 1123 also helps to enhance the structural stability of the inner liner 1. When subjected to external impact or extrusion, the step structure can provide certain support and buffering effects to prevent the inner liner 1 from deformation or rupture.

[0042] like Figure 3 As shown, one end of the outer layer 12 close to the closed end 113 is open and extends beyond the bottom surface of the closed end 113 , and a gap is provided between the closed end 113 and the outer layer 12 , in which a bottom cover 14 is provided.

[0043] In this embodiment, one end of the outer layer 12 close to the closed end 113 is constructed as an open type and extends to the bottom surface beyond the closed end 113. At the same time, a certain gap is maintained between the closed end 113 and the outer layer 12, and a bottom cover 14 is arranged in the gap. The gap not only provides space for the installation of the bottom cover 14, but also plays a certain buffering role. When subjected to external impact or extrusion, the gap can absorb part of the force and protect the inner layer 11 from being easily damaged. The bottom cover 14 is arranged in the gap, and the height of the inner layer 11 can be fixed after the inner layer 11 is inserted into the outer layer 12. There is no need to first weld the bottom of the outer layer 12 and then push the inner layer 11 to exhaust, which simplifies the process steps and reduces the process difficulty.

[0044] The bottom cover 14 includes a top wall 141 fixedly connected to the closed end 113 and a side wall 142 tightly matched with the outer layer 12 .

[0045] In this embodiment, the fixed connection between the top wall 141 and the closed end 113 ensures the stable connection between the bottom cover 14 and the inner liner 1, effectively preventing the bottom cover 14 from loosening or falling off during use, thereby ensuring the integrity and safety of the inner liner 1. The close fit between the side wall 142 and the outer layer 12 further enhances the sealing of the inner liner 1, prevents heat from being lost from the bottom of the inner liner 1, and improves the thermal insulation effect. In addition, the structure of the top wall 141 and the side wall 142 is relatively simple, easy to manufacture and install, which helps to reduce production costs and improve production efficiency.

[0046] The closed end 113 is recessed toward the open end 111 to form an arc portion 1131 , and a portion of the top wall 141 corresponding to the arc portion 1131 is recessed toward the closed end 113 , and a distance between the closed end 113 and the top wall 141 is 0-4 mm.

[0047] The closed end 113 is recessed toward the open end 111 to form an arc portion 1131, and the top wall 141 is also partially recessed toward the closed end 113 to reduce the distance between the closed end 113 and the bottom cover 14, thereby reducing the air between the closed end 113 and the bottom cover 14. Specifically, the distance between the closed end 113 and the top wall 141 is 0 to 4 mm. The two ends of the top wall 141 are welded to the closed end 113, and the distance is 0 mm. The middle part of the top wall 141 has a gap greater than 0 and less than 4 mm with the closed end 113. This design not only takes into account the stability of the structure and the feasibility of manufacturing, but also ensures the aesthetics and performance of the product.

[0048] The radius of the arc portion 1131 is 0 to 4 mm.

[0049] In order to reduce the air between the bottom cover 14 and the inner layer 11 , the fillet radius of the arc portion 1131 needs to be controlled within a range of 0 to 4 mm.

[0050] This embodiment also provides a thermos cup, including an outer shell and an inner liner 1, wherein the inner liner 1 includes the aforementioned composite inner liner 1.

[0051] As the outer protective layer of the thermos cup, the shell not only provides good protection, but also can enhance the overall texture of the product by designing the shape of the shell. As the core component of the thermos cup, the performance of the liner 1 directly determines the insulation effect and service life of the thermos cup. The design of the composite liner 1 fully considers the requirements of insulation performance, sealing and durability. The thermos cup in this embodiment adopts the aforementioned composite liner 1 design, which not only has excellent insulation performance, but also is beautiful, durable and practical, meeting the user's demand for high-quality thermos cups.

[0052] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes but is not limited to the contents described in the drawings and the above specific embodiments. Any modification that does not deviate from the functional and structural principles of the present invention shall be included in the scope of the claims.

Claims

1. A composite liner, comprising an inner layer (11) and an outer layer (12), wherein a vacuum layer (13) is formed between the inner layer (11) and the outer layer (12), wherein the inner layer (11) has an open end (111) and a closed end (113), wherein: The inner layer (11) is formed with a first recess (112) recessed toward the inner cavity of the inner layer (11) at a position adjacent to the opening end (111), and the outer layer (12) is formed with a second recess (121) recessed toward the first recess (112) at a portion flush with the first recess (112) so as to reduce the gap between the inner layer (11) and the outer layer (12).

2. The composite liner according to claim 1, characterized in that: The distance between the first recess (112) and the second recess (121) is 0 to 5 mm.

3. The composite liner according to claim 1, characterized in that: The second recess (121) is constructed as an arc segment, and both the upper end and the lower end of the arc segment are tightly matched with the first recess (112).

4. The composite liner according to claim 1, characterized in that: The second recess (121) is configured to be consistent in shape with the first recess (112) and to fit tightly with the first recess (112).

5. The composite liner according to any one of claims 1 to 4, characterized in that: The first recess (112) comprises at least a group of sequentially arranged inclined sections (1122) and straight sections (1121), and the inclined sections (1122) are inclined in a direction away from the outer layer (12).

6. The composite liner according to any one of claims 1 to 4, characterized in that: One end of the outer layer (12) close to the closed end (113) is open and extends beyond the bottom surface of the closed end (113); a gap is provided between the closed end (113) and the outer layer (12); a bottom cover (14) is provided in the gap.

7. The composite liner according to claim 6, characterized in that: The bottom cover (14) comprises a top wall (141) fixedly connected to the closed end (113) and a side wall (142) tightly matched with the outer layer (12).

8. The composite liner according to claim 7, characterized in that: The closed end (113) is recessed toward the open end (111) to form an arc portion (1131), and a portion of the top wall (141) corresponding to the position of the arc portion (1131) is recessed toward the closed end (113), and a distance between the closed end (113) and the top wall (141) is 0 to 4 mm.

9. The composite liner according to claim 8, characterized in that: The radius of the arc portion (1131) is 0 to 4 mm.

10. A thermos cup, comprising an outer shell and an inner liner, characterized in that: The inner liner (1) comprises the composite inner liner according to any one of claims 1 to 9.

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