A glue-free heat-insulating cup

Abstract

This utility model provides a glue-free insulated cup, belonging to the field of insulated cups. It solves the problem of how to simplify the structure while ensuring the heat insulation effect. A glue-free insulated cup includes an outer cup layer, an aluminum foil, and an inner cup layer. The outer cup layer is fitted over the inner cup layer, and the aluminum foil is located between the inner and outer cup layers, completely covering the inner wall of the outer cup layer. The inner cup layer has an inwardly recessed heat insulation groove at one end, which is connected to the bottom of the inner cup layer. A heat insulation gap exists between the heat insulation groove and the aluminum foil. When the inner cup layer is inserted into the outer cup layer and aluminum foil, the inner and outer cup layers are snapped together. By placing the inner cup layer within an insulated cup holder formed by the outer cup layer and aluminum foil, and providing an inwardly recessed heat insulation groove on the cup body, the heat insulation structure is simplified while ensuring the heat insulation effect.

Description

Technical Field

[0001] This utility model belongs to the field of heat-insulating cups, and specifically relates to a glue-free heat-insulating cup. Background Technology

[0002] Paper cups, as convenient and easy-to-use containers, are a common drinking tool in many households and public places due to their low cost, and are widely used in the hot beverage packaging industry. However, because they use a single layer of paper as the cup wall, heat can quickly penetrate the cup wall during use. Due to air convection on the outside of the cup wall, heat inside the cup is easily lost, failing to achieve a heat preservation effect and causing burns to the hands, resulting in a poor user experience. To improve the heat insulation effect of paper cups, existing paper cups are usually formed by stacking and rolling multiple layers of paper, and by setting a corrugated structure between the paper layers, utilizing the heat insulation properties of still air to form a heat-insulating paper cup. However, because the corrugated paper needs to be fixed to the multi-layer paper cup by gluing, a large amount of adhesive needs to be applied to the inner and outer cup layers. Long-term contact poses a potential food safety risk, and the gluing method increases production energy consumption and time costs, which is not conducive to the recycling of waste paper cups. In addition, using a corrugated structure for heat insulation makes the cup wall thicker, affecting the grip. Summary of the Invention

[0003] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a glue-free heat insulation cup. The technical problem this invention aims to solve is: how to simplify the structure while ensuring the heat insulation effect.

[0004] The purpose of this utility model can be achieved through the following technical solution: A glue-free heat-insulating cup includes an outer cup layer, an aluminum foil, and an inner cup layer. The outer cup layer is sleeved outside the inner cup layer, and the aluminum foil is located between the inner cup layer and the outer cup layer, and the aluminum foil completely covers the inner wall of the outer cup layer. The inner cup layer is characterized in that one end is provided with an inwardly recessed heat-insulating groove, one end of the heat-insulating groove is connected to the bottom of the inner cup layer, and there is a heat-insulating gap between the heat-insulating groove and the aluminum foil. When the inner cup layer is inserted into the outer cup layer and the aluminum foil, the inner cup layer and the outer cup layer are snapped together and fixedly connected.

[0005] This application mainly improves upon existing paper cups by adding an outer cup layer over the inner cup layer to prevent the user from contacting the inner cup wall. Furthermore, by covering the inner wall of the outer cup layer with aluminum foil, heat radiated from the inner cup layer is reflected, blocking heat transfer between the inner cup layer and the side wall of the paper cup. An inwardly recessed heat-insulating groove is provided in the cup body of the inner cup layer, and this groove, along with the aluminum foil and the outer cup layer, forms a heat-insulating gap. By utilizing the aluminum foil to reflect heat radiation and the insulating properties of still air, heat transfer is blocked. Finally, by interlocking the inner and outer cup layers, the heat insulation effect is further enhanced.

[0006] In the aforementioned glue-free insulated cup, one end of the insulation groove connects to the bottom of the cup to form a protrusion. Both the bottom ends of the outer cup layer and the aluminum foil have abutment portions. When the inner cup layer is inserted into the outer cup layer and aluminum foil, the protrusion and the abutment portion abut against each other until the protrusion is inserted between the abutment portion and the bottom of the outer cup layer, thus locking the inner and outer cup layers together. By providing a protrusion and an abutment portion at the bottom ends of the inner and outer cup layers respectively, and by locking the abutment portion with the protrusion, the inner cup layer is fixed inside the outer cup layer, avoiding potential food safety hazards caused by internal adhesive coating.

[0007] In the aforementioned glue-free insulated cup, the outer cup layer and aluminum foil are fitted together to form an insulated cup base, and one end of the inner cup layer is inserted into the insulated cup base and is interference-fitted with the insulated cup base. By using an interference fit, the inner cup layer and the insulated cup base are fixed together, thereby avoiding potential food safety hazards caused by internal adhesive coating.

[0008] In the aforementioned glue-free heat-insulating cup, the inner cup layer and the heat-insulating cup seat are connected by an interference fit and / or by a locking connection between the protrusion and the abutment.

[0009] In the aforementioned glue-free heat-insulating cup, an opening is provided above the outer cup layer for inserting the inner cup layer, and a rolled edge is provided at the top of the inner cup layer. The rolled edge covers the gap between the inner cup layer and the outer cup layer, and the aluminum foil is located within the aforementioned gap.

[0010] In the aforementioned glue-free insulated cup, the abutment and the insulation groove are formed by bending the circumferential sidewalls of the outer and inner cup layers, respectively, and both the abutment and the protrusion are arc-shaped. By using arc-shaped surfaces as the contact surfaces between the abutment and the protrusion, it is easier for users to insert and remove the inner cup layer, thus improving the user experience.

[0011] In the aforementioned glue-free insulated cup, the bottom of the outer cup layer has a protrusion that raises the height of the inner cup layer, and the aluminum foil is sandwiched between the bottom of the cup and the protrusion of the outer cup layer. By providing a protrusion at the bottom to raise the inner cup layer, the coverage area of ​​static air is increased, further improving the heat insulation effect of the insulated cup.

[0012] In the aforementioned glue-free heat-insulating cup, the inner wall of the outer cup layer and the side wall of the boss cooperate to form a groove, and the bottom end of the aluminum foil protrudes upward and is located in the groove.

[0013] In the aforementioned glue-free heat-insulating cup, the length of the heat-insulating groove is greater than or equal to the length of the abutment portion.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] 1. This application forms an insulated cup holder by covering the inner wall of the outer cup layer with aluminum foil, and sets an insulated groove on the side of the inner cup holder to cooperate with the insulated cup holder to form an insulated gap. By utilizing the heat insulation properties of static air, it not only achieves a heat preservation effect, but also reduces the user's temperature perception in the area where the heat insulation gap is located through the heat insulation properties, thereby improving the user experience.

[0016] 2. Based on the outer cup layer, aluminum foil layer and inner cup layer, this application covers the inner side of the outer cup layer with aluminum foil layer to form a heat-insulating cup holder. Through interference fit and bottom protrusion and abutment, the inner cup layer and heat-insulating cup holder are snapped together to form a paper cup that can be used normally. This simplifies the processing method and avoids potential food safety hazards caused by adhesives. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0018] Figure 2 This is a three-dimensional exploded cross-sectional view of the present invention;

[0019] Figure 3 This is a cross-sectional schematic diagram of the present invention;

[0020] Figure 4 yes Figure 3 A magnified view of a portion of the image;

[0021] In the diagram, 1. Insulated cup holder; 1a. Outer cup layer; 1a1. Abutting part; 1a2. Opening; 1a3. Boss; 1a4. Groove; 1b. Aluminum foil; 2. Inner cup layer; 2a. Cup body; 2a1. Insulation groove; 2b. Cup bottom; 2c. Protrusion; 2d. Rolled edge; 3. Insulation spacing; Detailed Implementation

[0022] The following are specific embodiments of the present invention, and the technical solution of the present invention will be further described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments. In this embodiment, the number of sub-cups is at least two, and the present invention mainly adopts a form composed of three sub-cups.

[0023] like Figure 1 and Figure 2 As shown, a glue-free heat-insulating cup includes an inner cup layer 2, an outer cup layer 1a, and an aluminum foil 1b located between the two. The inner cup layer 2, aluminum foil 1b, and outer cup layer 1a are arranged sequentially from the inside to the outside. The aluminum foil 1b covers the outer cup layer 1a and forms a heat-insulating cup base 1. The bottom side wall of the outer cup layer 1a is provided with an inwardly recessed abutment portion 1a1, which is arranged circumferentially around the outer cup layer 1a. In addition, the top of the inner cup layer 2 is provided with a rolled edge 2d, which covers the opening 1a2 of the heat-insulating cup base 1. The outer cup layer 1a is provided with an opening 1a2.

[0024] It is worth mentioning that, such as Figure 2 As shown, the bottom of the outer cup layer 1a is provided with a boss 1a3 that protrudes upward 2c. The side wall of the boss 1a3 cooperates with the inner wall of the outer cup layer 1a to form a groove 1a4 located at the bottom. The inner cup layer 2 includes a cup body 2a and a cup bottom 2b. The cup body 2a is provided with a heat insulation groove 2a1 located at the bottom. One end of the heat insulation groove 2a1 is connected to the cup bottom 2b to form a protrusion 2c.

[0025] like Figure 3 and Figure 4 As shown, the inner cup layer 2, aluminum foil 1b, and outer cup layer 1a are arranged sequentially from the inside to the outside. The bottom of the outer cup layer 1a is provided with a boss 1a3. The outer wall of the boss 1a3 and the inner wall of the outer cup layer 1a cooperate to form a groove 1a4 located at the bottom for placing the aluminum foil 1b. The aluminum foil 1b covers the outer cup layer 1a and cooperates with the outer cup layer 1a to form a heat-insulating cup seat 1. The outer wall of the outer cup layer 1a is circumferentially bent to form a stop part 1a1. The stop part 1a1 is located at the end of the heat-insulating cup seat 1 near the bottom 2b of the cup. One end of the heat-insulating groove 2a1 of the inner cup layer 2 is connected to the bottom 2b of the cup to form a protrusion 2c. The protrusion 2c and the stop part 1a1 cooperate to complete the snap-fit ​​fixation of the inner cup layer 2 and the heat-insulating cup seat 1. The heat-insulating groove 2a1 and the heat-insulating cup seat 1 cooperate to form a heat-insulating gap 3.

[0026] It is worth mentioning that the method of using the protrusion 2c and the abutment 1a1 to complete the snap-fit ​​connection between the inner cup layer 2 and the heat insulation cup seat 1 is only one embodiment of this utility model. It does not exclude other technical solutions that can fix the inner cup layer 2 and the heat insulation cup seat 1 formed by the aluminum foil 1b and the outer cup layer 1a without glue. For example, the inner cup layer 2 and the heat insulation cup seat 1 can be used with an interference fit, or on the basis of the interference fit, the snap-fit ​​connection between the heat insulation cup seat 1 and the inner cup layer 2 can be completed by setting the protrusion 2c and the abutment 1a1 at the bottom. In this case, the length of the heat insulation groove 2a1 is greater than the length of the abutment 1a1, and the protrusion 2c and the abutment 1a1 are arc-shaped.

[0027] Based on a conventional cup body, this application adds a heat-insulating cup holder 1, formed by an outer cup layer 1a and an aluminum foil 1b, to the outside of the inner cup layer 2. This heat-insulating cup holder 1 increases the distance between the user and the heat source when holding the cup, reducing the impact of the liquid temperature inside the cup on the user's grip and improving the user experience. Furthermore, this application employs a technical solution with an aluminum foil 1b sandwiched in the middle, a heat-insulating groove 2a1 on the inner cup layer 2, and a protrusion 1a3 at the bottom of the heat-insulating cup holder 1. By covering the outer cup layer 1a with the aluminum foil 1b, the heat insulation groove 2a1 on the inner cup layer 2 and the protrusion 1a3 on the bottom of the heat-insulating cup holder 1 further enhances the user experience. The emitted heat is reflected and, combined with the heat insulation gap formed by the heat insulation groove 2a1 and the aluminum foil 1b, and the bottom protrusion 1a3, a certain heat insulation space is formed. Utilizing the heat insulation properties of static air, the heat loss in the inner cup layer 2 is further blocked. Since the heat insulation gap is located at the bottom of the inner cup layer 2 and has a large coverage area, it can block the heat transfer of the inner cup layer 2 and improve the user's grip comfort. Compared with existing heat-insulated paper cups, the cup body is thicker overall due to the corrugated structure and cannot keep the temperature, making it more difficult to process.

[0028] It is worth mentioning that the bottom of the outer cup layer 1a of this application is bent to form abutment part 1a1, and one end of the heat insulation groove 2a1 on the inner cup layer 2 is connected to the cup bottom 2b to form a protrusion 2c. The protrusion 2c and the abutment part 1a1 are interlocked to fix the heat insulation cup holder 1 and the inner cup layer 2, ensuring the interlocking and fixing of the multi-layer paper cup in the glue-free state. The interlocking and fixing of the multi-layer cup body replaces the method of multiple cup body adhesive connection, reducing potential food safety risks. Furthermore, the interference fit between the inner cup layer 2 and the heat insulation cup holder 1 further improves the stability of the glue-free heat insulation cup structure.

[0029] More importantly, since the inner cup layer 2 of this application is assembled by inserting one end into the heat-insulating cup holder 1, during the insertion process, the protrusion 2c will interfere with the abutment part 1a1. Under the action of a continuous downward force, the arc-shaped protrusion 2c will push the abutment part outward to undergo elastic deformation, providing space for the protrusion 2c to move downward. In order to improve the stability of the snap-fit ​​and prevent the inner cup layer 2 from falling out of the heat-insulating cup holder 1 during placement, this application sets the abutment part 1a1 and the protrusion 2c at the bottom of the outer cup layer 1a and the inner cup layer 2, respectively. By setting the abutment part 1a1 at the bottom of the outer cup layer 1a, the distance from the bottom 2b of the outer cup layer 1a to the abutment part is shortened, increasing the force required for the protrusion 2c to push the abutment part 1a1 outward to bend, thereby ensuring that the cup body and the inner cup layer 2 can be snap-fitted together, thereby improving the stability of the snap-fit.

[0030] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0031] Although this document frequently uses terms such as 1. heat-insulating cup holder; 1a. outer cup layer; 1a1. abutment; 1a2. opening; 1a3. boss; 1a4. groove; 1b. aluminum foil; 2. inner cup layer; 2a. cup body; 2a1. heat-insulating groove; 2b. cup bottom; 2c. protrusion; 2d. rolled edge; 3. heat-insulating gap, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any kind of additional limitation would contradict the spirit of this utility model.

Claims

1. A glueless heat-insulating cup comprising an outer cup layer (la), an aluminum foil (lb) and an inner cup layer (2), the outer cup layer (la) being sleeved outside the inner cup layer (2), the aluminum foil (lb) being located between the inner cup layer (2) and the outer cup layer (la), and the aluminum foil (lb) completely covering the inner wall of the outer cup layer (la), characterized in that, One end of the inner cup layer (2) is provided with an inwardly recessed heat insulation groove (2a1). One end of the heat insulation groove (2a1) is connected to the bottom (2b) of the inner cup layer (2). There is a heat insulation gap (3) between the heat insulation groove (2a1) and the aluminum foil (1b). When the inner cup layer (2) is inserted into the outer cup layer (1a) and the aluminum foil (1b), the inner cup layer (2) and the outer cup layer (1a) are snapped together.

2. The glue-free heat-insulating cup according to claim 1, characterized in that, One end of the heat insulation groove (2a1) is connected to the bottom of the cup (2b) to form a protrusion. The bottom ends of the outer cup layer (1a) and the aluminum foil (1b) are provided with abutment parts (1a1). When the inner cup layer (2) is inserted into the outer cup layer (1a) and the aluminum foil (1b), the protrusion (2c) and the abutment parts (1a1) abut against each other until the protrusion (2c) falls between the abutment parts (1a1) and the bottom of the outer cup layer (1a) (2b), and the inner cup layer (2) and the outer cup layer (1a) are snapped together.

3. The glue-free heat-insulating cup according to claim 1 or 2, characterized in that, The outer cup layer (1a) and aluminum foil (1b) are combined to form a heat-insulating cup holder (1), and one end of the inner cup layer (2) is inserted into the heat-insulating cup holder (1) and is interference-fitted with the heat-insulating cup holder (1).

4. The glue-free heat-insulating cup according to claim 3, characterized in that, The inner cup layer (2) and the heat-insulating cup seat (1) are connected by an interference fit and / or by the engagement of the protrusion (2c) and the abutment (1a1).

5. The glue-free heat-insulating cup according to claim 4, characterized in that, The outer cup layer (1a) has an opening (1a2) above it for inserting the inner cup layer (2). The top of the inner cup layer (2) has a rolled edge (2d), which covers the gap between the inner cup layer (2) and the outer cup layer (1a). The aluminum foil (1b) is located in the gap.

6. The glue-free heat-insulating cup according to claim 4, characterized in that, The abutment (1a1) and the heat insulation groove (2a1) are formed by bending the circumferential sidewalls of the outer cup layer (1a) and the inner cup layer (2), respectively, and both the abutment (1a1) and the protrusion (2c) are arcs.

7. The glue-free heat-insulating cup according to claim 4, characterized in that, The bottom of the outer cup layer (1a) is provided with a boss (1a3) that raises the height of the inner cup layer (2), and the aluminum foil (1b) is sandwiched between the cup bottom (2b) and the boss (1a3) of the outer cup layer (1a).

8. The glue-free heat-insulating cup according to claim 4, characterized in that, The inner wall of the outer cup layer (1a) and the side wall of the boss (1a3) cooperate to form a groove (1a4), and the bottom end of the aluminum foil (1b) protrudes upward and is located in the groove (1a4).

9. The glue-free heat-insulating cup according to claim 4, characterized in that, The length of the heat insulation groove (2a1) is greater than or equal to the length of the abutment part (1a1).

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