Thin-wall plastic cup

Abstract

The utility model provides a thin-wall plastic cup which comprises a cup body, a containing cavity with an opening in the upper end is formed in the cup body, a cup bottom is arranged at the bottom of the cup body, the cup bottom comprises a round first connecting part, the first connecting part is coaxial with the containing cavity, and the center of the first connecting part is in an arc-shaped downward concave shape. The edge of the first connecting part obliquely extends downwards to form a third connecting part, the edge of the third connecting part horizontally extends outwards in the radial direction to form a fourth connecting part, and the bottom face of the fourth connecting part is higher than the bottom face of the cup body. And the edge of the fourth connecting part obliquely extends upwards to form a fifth connecting part connected with the cup body. When the thin-wall plastic cup is used, the thin wall can still keep firm hand feeling, the cup bottom is thin, the thin-wall plastic cup can bear strong impact force, the thin-wall plastic cup can keep strength in an extremely cold state, and the thin-wall plastic cup keeps the shape, does not crack, is not easy to deform, and is good in using effect and long in service life in the using process of adding ice drinks or other loads.

Description

Technical Field

[0001] The utility model relates to a plastic cup, in particular to a thin-walled plastic cup. Background Art

[0002] Cups are commonly used daily necessities, which can be classified into glass cups, ceramic cups, enamel cups, plastic cups, etc. according to their materials. Plastic cups have the characteristics of labor-saving processing, low cost, various shape changes, easy coloring, etc., and have developed rapidly in recent years.

[0003] Existing plastic cups are usually single-layer structures with relatively thin thickness. Therefore, the overall structural strength is not high, and deformation may occur during use. At the same time, affected by the bottom structure of the cup, its impact resistance and toughness are poor, and it is easy to break during use, especially when placing ice cubes or other decorations; moreover, the existing plastic cup structure cannot provide good protection for the injection port of the injection molded part. Content of the Utility Model

[0004] Technical Problems to be Solved

[0005] The technical problem to be solved by the utility model is to provide a thin-walled plastic cup with a compact structure, high strength, good impact resistance and toughness, and a long service life.

[0006] Technical Solutions for Solving the Problems

[0007] The utility model provides a thin-walled plastic cup, including a cup body 1. An accommodating cavity 10 with an open upper end is formed in the cup body 1. A cup bottom 12 is provided at the bottom of the cup body 1. The cup bottom 12 includes a circular first connecting portion 121. The first connecting portion 121 is coaxial with the accommodating cavity 10 and its center is arc-shaped and concave downward. The edge of the first connecting portion 121 extends downward obliquely to form a third connecting portion 123. The edge of the third connecting portion 123 extends horizontally radially outward to form a fourth connecting portion 124. The bottom surface of the fourth connecting portion 124 is higher than the bottom surface of the cup body 1. The edge of the fourth connecting portion 124 extends upward obliquely to form a fifth connecting portion 125 connected to the cup body 1.

[0008] Furthermore, the side wall of the cup body 1 is an inclined surface and can be inserted into the accommodating cavity of another cup body.

[0009] Furthermore, a strip-shaped reinforcing portion 11 is provided between the inner wall of the accommodating cavity 10 and the upper surface of the cup bottom 12. There are multiple reinforcing portions 11 and they are circumferentially evenly distributed.

[0010] Further, a limiting surface capable of contacting the bottom of the inserted cup body and achieving axial limiting is formed on the top surface of the reinforcing portion 11. When the inserted cup body 1 contacts the limiting surface of the reinforcing portion 11, the radial gap between the two cup bodies 1 is greater than or equal to 0.2 mm and less than or equal to 2 mm.

[0011] Further, an arc-shaped transition connection is provided between the fourth connecting portion 124 and the third connecting portion 123, and between the fourth connecting portion 124 and the fifth connecting portion 125.

[0012] Further, a second connecting portion 122 protruding upward is provided between the first connecting portion 121 and the third connecting portion 123.

[0013] Further, the ratio of the radius r2 of the second connecting portion 122 to the radius r1 of the first connecting portion 121 is greater than or equal to 1 and less than or equal to 1.2.

[0014] Further, the third connecting portion 123 is an upwardly convex arc-shaped surface, and the ratio of the radius r3 of the third connecting portion 123 to the radius r1 of the first connecting portion 121 is greater than or equal to 4 and less than or equal to 6.

[0015] Further, the upper open end of the cup body 1 extends outward to form a cup mouth 13, and the thickness of the cup mouth 13 is greater than the thickness of the cup body 1.

[0016] Further, the thickness of the cup bottom 12 is greater than the thickness of the side wall of the cup body 1.

[0017] Beneficial Effects

[0018] For the thin-walled plastic cup of the present utility model, through the design optimization of the cup bottom, the glue inlet of the injection molded part is protected, the impact resistance and toughness of the cup bottom are increased, the cup bottom is not easily broken by ice cubes or other decorations during use, the structural strength is high, and the service life is long; the thickness and arc degree of the cup mouth increase the strength and hardness of the cup body, and at the same time increase the taste and comfort during use; the reinforcing portion is provided on the side of the cup bottom to achieve structural reinforcement. At the same time, in the stackable packaging of the cups, they can be easily taken and placed, avoiding jamming, saving transportation space during stacking, and reducing transportation and storage costs; for the thin-walled plastic cup of the present utility model, during use, the wall is thin but still feels firm, the cup bottom is thin and can withstand strong impact, it can maintain its strength in an extremely cold state, and it can maintain its shape, not break, and is not easily deformed during the use of adding ice drinks or other load-bearing processes, with good use effect and long service life. Description of the Drawings

[0019] Figure 1 It is a schematic structural diagram of the thin-walled plastic cup of the present utility model;

[0020] Figure 2This is a cross-sectional view of the thin-walled plastic cup of the present utility model;

[0021] Figure 3 This is a partially enlarged view of the thin-walled plastic cup of the present utility model;

[0022] Figure 4 This is a schematic structural view of the bottom of the thin-walled plastic cup of the present utility model;

[0023] Figure 5 is Figure 2 the enlarged view of part A in

[0024] Figure 6 This is a schematic view of the stacked state of the thin-walled plastic cup of the present utility model;

[0025] Figure 7 This is a partially enlarged view of the stacked state of the thin-walled plastic cup of the present utility model;

[0026] Figure 8 is Figure 7 the enlarged view of part B in Specific embodiments

[0027] The following will introduce the embodiments of the present utility model in detail with reference to the accompanying drawings.

[0028] Refer to Figures 1-8, the present utility model provides a thin-walled plastic cup, which is formed by plastic injection molding and includes a cup body 1. An accommodation cavity 10 is formed inside the cup body 1. The upper end of the accommodation cavity 10 is open for containing liquids, such as beverages, wines, teas, etc. A cup bottom 12 is provided at the bottom of the cup body 1. The cup bottom 12 includes a first connecting portion 121. The first connecting portion 121 is circular, coaxial with the accommodation cavity 10, and the center of the first connecting portion is arcuately concave downward, forming a downwardly convex structure, that is, the center (center of the sphere) of the first connecting portion 121 is located above the first connecting portion. The edge of the first connecting portion 121 extends obliquely downward to form a third connecting portion 123. The third connecting portion 123 is an upwardly convex arc surface, that is, the center (center of the sphere) of the third connecting portion 123 is located below the center (center of the sphere) of the circle. In this embodiment, the ratio (r3 / r1) of the radius r3 of the third connecting portion 123 to the radius r1 of the first connecting portion 121 is greater than or equal to 4 and less than or equal to 6; the edge of the third connecting portion 123 extends horizontally radially outward to form a fourth connecting portion 124. The bottom surface of the fourth connecting portion 124 is higher than the bottom surface of the cup body 1. Therefore, when placed, the bottom surface of the fourth connecting portion does not contact the tabletop; in this embodiment, the distance between the bottom surface of the fourth connecting portion and the bottom of the cup body 1 is 1 mm - 3 mm. The edge of the fourth connecting portion 124 extends obliquely upward to form a fifth connecting portion 125. The fourth connecting portion 124 and the third connecting portion 123, and the fourth connecting portion and the fifth connecting portion 125 are both connected by an arc transition. The edge of the fifth connecting portion 125 is connected to the inner wall of the cup body 1, that is, to the inner wall of the accommodation cavity. The fifth connecting portion is a downwardly convex arc surface, that is, its center (center of the sphere) is located at the upper end. The fifth connecting portion 125 is connected to the inner wall of the cup body 1 through a fillet (arc surface). In this embodiment, both the upper surface and the lower surface of the fifth connecting portion are connected to the inner wall of the cup body 1 through a fillet (arc surface), which increases the contact area between the cup body and the cup bottom and improves the overall structural strength.

[0029] In order to further improve its impact resistance and overall toughness, in this embodiment, a second connecting portion 122 is provided between the first connecting portion 121 and the third connecting portion 123. The second connecting portion 122 is an upwardly convex arc surface, that is, its center (center of the sphere) is located at the lower end of the second connecting portion; at the same time, the ratio (r2 / r1) of the radius r2 of the second connecting portion 122 to the radius r1 of the first connecting portion 121 is greater than or equal to 1 and less than or equal to 1.2.

[0030] The following takes the cross-section of the cup bottom as a reference to illustrate the preferred embodiment of the cup bottom:

[0031] Refer to Figure 4, the first connecting part 121 is circular and concave downward (the upper surface is concave and the lower surface is convex), its radius is r1, and the circular angle formed between the entire first connecting part 121 and the center of itself (the first connecting part) is 31° - 32°; the second connecting part 122 is an upward convex arc surface, its radius is r2, and r2 = (1.05 - 1.1)r1, that is, 1.05 ≤ r2 / r1 ≤ 1.1, and the central angle formed by the second connecting part 122 and the center of itself is 49° - 50°; the third connecting part 123 is an upward convex arc surface, its radius is r3, and r3 = (4.5 - 4.7)r1, that is, 4.5 ≤ r3 / r1 ≤ 4.7, and the central angle formed by the third connecting part 123 and the center of itself is 16° - 17°; the overall diameter of the second and third connecting parts accounts for 80% - 85% of the diameter of the entire cup bottom; and the thickness of the cup bottom 12 is greater than the thickness of the side wall of the cup body 1, and the ratio of the two is 2:1 - 3:1.

[0032] The above-mentioned first connecting part is circular as a whole, and the second, third, fourth and fifth connecting parts are circular rings.

[0033] The upper open end of the cup body 1 extends outward in an arc to form a cup mouth 13. The thickness of the cup mouth 13 is greater than the thickness of the cup body 1, and the two are naturally transitioned through an arc surface.

[0034] In this application, the side wall of the cup body 1 is an inclined surface, that is, a conical structure that is wider at the upper end and narrower at the lower end as a whole. It can be inserted into the accommodating cavity of another cup body, which is convenient for stacking the cup bodies and reduces the occupied space for handling or storage.

[0035] A reinforcing part 11 is provided between the inner wall of the accommodating cavity 10 and the upper surface of the cup bottom 12. The reinforcing part 11 is a strip-shaped structure, and there are multiple of them and they are evenly distributed in the circumferential direction. Preferably, there are four; a limiting surface is formed on the top surface of the reinforcing part 11, which can contact the bottom of the inserted cup body, so as to realize axial limitation. When the inserted cup body 1 contacts the limiting surface of the reinforcing part 11, the radial gap between the two cup bodies 1 (the distance between the outer wall of the cup body and the inner wall of another cup body) is greater than or equal to 0.2 mm and less than or equal to 2 mm, which is convenient for taking and placing and will not cause jamming.

[0036] The thin-walled plastic cup of the present utility model optimizes the design of the cup bottom to protect the glue inlet of the injection molding part, increases the impact resistance and toughness of the cup bottom, and the cup bottom is not easily broken by ice cubes or other decorations during use. It has high structural strength and a long service life. The thickness and arc degree of the cup mouth increase the strength and hardness of the cup body, and at the same time increase the taste and comfort during use. A strengthening part is provided on the side of the cup bottom to strengthen the structure. At the same time, when the cups can be stacked and packaged, they can be easily taken and placed, avoiding jamming, saving transportation space during the stacking process, and reducing transportation and storage costs. The thin-walled plastic cup of the present utility model can still maintain a firm feel during use with a thin wall, has a thin cup bottom and strong impact resistance, can maintain its strength in an extremely cold state, and can maintain its shape without breaking and is not easily deformed during the use of adding ice drinks or other load-bearing applications. It has good use effects and a long service life.

[0037] The above are only the preferred embodiments of the present utility model. It should be noted that for those of ordinary skill in the art of this technology, without departing from the technical principle of the present utility model, several improvements and refinements can still be made, and these improvements and refinements should also be regarded as the protection scope of the present utility model.

Claims

1. A thin-walled plastic cup, characterized in that: It includes a cup body. An accommodation cavity with an open upper end is formed in the cup body. The bottom of the cup body is provided with a cup bottom. The cup bottom includes a circular first connecting part. The first connecting part is coaxial with the accommodation cavity and its center is concave downward in an arc shape. The edge of the first connecting part extends downward obliquely to form a third connecting part. The edge of the third connecting part extends horizontally radially outward to form a fourth connecting part. The bottom surface of the fourth connecting part is higher than the bottom surface of the cup body. The edge of the fourth connecting part extends upward obliquely to form a fifth connecting part connected to the cup body.

2. The thin-walled plastic cup according to claim 1, wherein: The side wall of the cup body is an inclined surface and can be inserted into the accommodation cavity of another cup body.

3. The thin-walled plastic cup according to claim 2, wherein: A strip-shaped reinforcing part is provided between the inner wall of the accommodation cavity and the upper surface of the cup bottom. There are multiple such reinforcing parts and they are circumferentially evenly distributed.

4. The thin-walled plastic cup according to claim 3, wherein: The top surface of the reinforcing part forms a limiting surface that can contact the bottom of the inserted cup body to achieve axial limitation. When the inserted cup body contacts the limiting surface of the reinforcing part, the radial gap between the two cup bodies is greater than or equal to 0.2 mm and less than or equal to 2 mm.

5. The thin-walled plastic cup according to claim 1, characterized in that: The fourth connecting part is connected to the third connecting part and the fifth connecting part through an arc transition.

6. The thin-walled plastic cup according to claim 1, wherein: There is a second connecting part protruding upward between the first connecting part and the third connecting part.

7. The thin-walled plastic cup according to claim 6, characterized in that: The ratio of the radius r2 of the second connecting part to the radius r1 of the first connecting part is greater than or equal to 1 and less than or equal to 1.

2.

8. The thin-walled plastic cup according to claim 1, wherein: The third connecting part is an upward convex arc surface, and the ratio of the radius r3 of the third connecting part to the radius r1 of the first connecting part is greater than or equal to 4 and less than or equal to 6.

9. The thin-walled plastic cup according to claim 1, wherein: The open upper end of the cup body extends outward in an arc shape to form a cup mouth. The thickness of the cup mouth is greater than the thickness of the cup body.

10. The thin-walled plastic cup according to claim 1, wherein: The thickness of the cup bottom is greater than the thickness of the side wall of the cup body.

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