Molded pulp cup capable of being tightened to cup body

Abstract

To provide a molded pulp cup that can be tightened to a cup body, with improved fastening and sealing effects.SOLUTION: The present invention discloses a molded pulp cup that can be tightened to a cup body. In particular, a cup lid that is integrally molded using a molded pulp molding technology is formed, and a C-shaped ring storage tank is formed inside the cup lid. Convex arc walls are protruded on head portions of both ends of the C-shaped ring storage tank, and an upper edge of the cup body is tightened and sealed via the C-shaped ring storage tank and the convex arc walls on the head portions of both ends of the C-shaped ring storage tank, thereby achieving fastening and sealing effects.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to the field of cup lids, and in particular to molded pulp cups that can be fastened to a cup body. [Background technology]

[0002] With the growing awareness of environmental protection and the gathering of public awareness, molded pulp products, which are injection molded using pulp fiber materials or plant materials as raw materials, have been quickly accepted and adopted by various industries and the general public due to their advantage of being easily recovered, remanufactured, and reused. Various types of pulp products have gradually replaced various plastic products in our lives, whether it be bowls, plates, cup lids, straws, packaging materials, cushioning materials, etc., and molded pulp products have gradually replaced plastic products, and the material of molded pulp products has changed from plastic to pulp. However, in the process of molding pulp molds, it was not possible to easily mold various shapes as plastic products are well known in the industrial world. Therefore, the effects or performance of plastic products could not be demonstrated when molding many products or after molding. However, the pulp mold industry has just begun, and there is still room for great progress and development. As one of the most common consumables in daily life, cup lids have particularly strict requirements for use, and cup lids as containers not only require food-grade materials and hygienic conditions, but also better sealing and higher safety. Summary of the Invention [Problem to be solved by the invention]

[0003] As shown in Figures 5 and 6, due to the limitations of molding conditions and materials, the sealing performance of the conventional molded pulp cup lid 3 is far inferior to that of a plastic cup lid. When the conventional molded pulp cup lid 3 is molded, the engagement part 31 is hooked to the cup body 4 by a negative angle recess, an inwardly inclined wall, or various geometrical methods. When the outer hoop 41 of the cup body 4 is fastened, the dimensions do not match completely, so the cup lid 3 easily comes off or cannot be completely sealed, causing the liquid in the cup body 4 to leak or overflow. In the conventional molded pulp cup lid 3 engagement part 31, only the hooking method is generally considered, and the strength is not considered. When the strength is considered, the optimal hooking force cannot be obtained. The conventional molded pulp cup lid 3 is easily deformed by the outer hoop 41 of the cup body 4, and the conventional cup lid 3 easily falls off when subjected to external force. This is a drawback of the conventional molded pulp cup lid 3, and it is not possible to achieve suitable sealing performance and safety. [Means for solving the problem]

[0004] The main object of the present invention is to provide a molded pulp cup that can be fastened to a cup body by using pulp molding technology to form an integrally molded cup lid, in which a C-shaped ring accommodating tank is formed on the inside of the cup lid, and convex arc walls are protruding on both end heads of the C-shaped ring accommodating tank, and the C-shaped ring accommodating tank and the convex arc walls on both end heads of the C-shaped ring accommodating tank fasten and seal the outer hoop formed on the upper edge of the cup body, thereby achieving the effect of fastening and sealing. Another object of the present invention is to provide a molded pulp cup that can be fastened to a cup body, in which the inside of the cup lid simultaneously fastens and seals the outer and inner surfaces of the upper edge of the cup body, the convex arc wall of one end head of the C-shaped ring accommodating tank can abut the outer surface of the upper edge of the cup body, and the convex arc wall of the other end head of the C-shaped ring accommodating tank can abut the inner surface of the upper edge of the cup body, and the cup lid simultaneously fastens the outer and inner surfaces of the upper edge of the cup body, thereby achieving the effects of fastening and sealing.

[0005] In order to achieve the above-mentioned object, the solution of the present invention provides a molded pulp cup that can be tightened to a cup body, in which the cup lid has a central sealing surface, a downwardly extending annular side wall is extended from the outer edge of the central sealing surface, and an annular extension flange is extended in the horizontal direction at the end of the annular side wall, and the annular extension flange is bent and extended in an arc shape to form a vertically downward annular lower wall, a C-shaped ring accommodating tank is formed on the inner surface of the arc-shaped bent portion between the annular extension flange and the annular lower wall of the cup lid, and convex arc walls are protrudingly provided at both end heads of the C-shaped ring accommodating tank.

[0006] Moreover, the cup lid is integrally molded using pulp fiber material through pulp molding technology.

[0007] More specifically, the above-mentioned convex arc walls are a first convex arc wall and a second convex arc wall, and the above-mentioned first convex arc wall is protrudingly provided on the inner surface of the annular expansion flange near one end head of the C-shaped ring accommodating tank of the annular side wall, and a second convex arc wall is protrudingly provided on the inner surface of the annular lower side wall at the other end head of the C-shaped ring accommodating tank, so that the upper edge of the cup body can be tightened and sealed via the C-shaped ring accommodating tank and the first convex arc wall and the second convex arc wall at both end heads of the C-shaped ring accommodating tank.

[0008] Furthermore, a vertical perpendicular line V extends in the Z-axis direction to the center point C of the C-shaped ring accommodating tank described above, a horizontal line E extends in the X-axis direction to the center point C of the C-shaped ring accommodating tank, the outermost vertex of the first convex arc wall is vertex P, the outermost vertex of the second convex arc wall is vertex Q, the line connecting the vertex P of the first convex arc wall to the center point C of the C-shaped ring accommodating tank is connection line L, the line connecting the vertex Q of the second convex arc wall to the center point C of the C-shaped ring accommodating tank is connection line K, and when the center point C of the C-shaped ring accommodating tank is taken as the base, the included angle θ formed by the connection line L and the connection line K is less than 180 degrees, and an outer hoop is formed on the upper edge of the cup body which is connected to the cup lid, and the cup lid is fitted to the upper edge of the cup body to form a horn shape, so that the outer hoop is fastened in the C-shaped ring accommodating tank.

[0009] More specifically, a central axis is provided at the center of the central sealing surface of the cup lid, a horizontal line G extends in the X-axis direction from the outer surface of the highest vertex of the central sealing surface, the outermost vertex of the first convex arc-shaped wall is vertex P, and the outermost vertex of the second convex arc-shaped wall is vertex Q, the vertical distance from the horizontal line G extending from the outer surface of the highest vertex of the central sealing surface to the outermost vertex P of the first convex arc-shaped wall is distance A, the vertical distance from the horizontal line G extending from the outer surface of the highest vertex of the central sealing surface to the outermost vertex Q of the second convex arc-shaped wall is distance B, the vertical distance A is smaller than the vertical distance B, the horizontal distance from the central axis U of the central sealing surface to the outermost vertex P of the first convex arc-shaped wall is distance M, the horizontal distance from the central axis U of the central sealing surface to the outermost vertex Q of the second convex arc-shaped wall is distance N, and the horizontal distance M is smaller than the horizontal distance N.

[0010] Furthermore, when the cup lid is connected to the cup body, an outer hoop formed by rolling a thin piece is formed on the upper edge of the cup body, and when the outer hoop of the cup body and the C-shaped ring receiving tank of the cup lid are connected, the above-mentioned second convex arc wall is located on the outer surface of the outer hoop of the cup body and its diameter decreases toward the inside, and a first external force is generated when the first convex arc wall abuts against the outer surface of the outer hoop of the cup body, and a second external force is generated when the first convex arc wall abuts against the inner surface of the outer hoop of the cup body. There is a distance difference between the first convex arc wall and the second convex arc wall, and the first convex arc wall and the second convex arc wall simultaneously generate acting forces on the inner and outer surfaces of the outer hoop of the cup body. Therefore, the structural design of the first convex arc wall and the second convex arc wall increases the strength of the cup lid and does not easily deform under the influence of external forces, and the phenomenon of the connection between the cup lid and the cup body becoming loose does not easily occur.

[0011] After adopting the above-mentioned means, the molded pulp cup cover of the fastenable cup body of the present invention is formed into an integrally molded cup cover by molded pulp molding technology, and a C-shaped ring accommodating tank is formed on the inner surface of the arc-shaped folded portion between the annular expansion flange and the annular lower wall of the cup cover, a first convex arc wall is protrudingly formed on the inner surface of the annular expansion flange near one end head of the C-shaped ring accommodating tank of the annular side wall, and a second convex arc wall is protrudingly formed on the inner surface of the annular lower wall of the other end head of the C-shaped ring accommodating tank, and the C-shaped ring accommodating tank and the first convex arc wall and the second convex arc wall at both end heads of the C-shaped ring accommodating tank fasten and seal the upper edge of the cup body, thereby achieving the effect of fastening and sealing. [Brief description of the drawings]

[0012] [Figure 1] FIG. 1 is a cross-sectional view of a cup lid of the present invention. [Diagram 2] FIG. 2 is a cross-sectional view of the cup lid and cup body of the present invention joined together. [Diagram 3] FIG. 3 is a partially enlarged view of FIG. [Figure 4] FIG. 4 is a half cross-sectional view of FIG. [Diagram 5] FIG. 5 is a diagram showing a general type of conventional cup lid. [Figure 6] FIG. 6 is a diagram showing a typical type of conventional cup lid. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] In order to further illustrate the technical solutions of the present invention, the present invention will be described in detail below through specific examples.

[0014] In order to allow the examiner to understand the specific structure of the present invention in more detail, as shown in Figs. 1 to 3, the molded pulp cup lid 1 of the fastenable cup body 2 provided by the present invention is formed as an integrally molded cup lid 1 by using a pulp mold molding technique using a pulp fiber material. The cup lid 1 is provided with a central sealing surface 10, and an annular side wall 11 extending downward is provided on the outer edge of the central sealing surface 10. An annular extension flange 12 is provided at the end of the annular side wall 11, spreading in the horizontal direction. The annular extension flange 12 is bent and extended in an arc shape to form an annular lower side wall 13 facing vertically downward. A C-shaped ring receiving tank 14 is formed on the inner surface of the portion bent in an arc shape between the annular extension flange 12 and the annular lower side wall 13 of the cup lid 1. Convex arc walls are provided at the heads of both ends of the C-shaped ring receiving tank 14, which are a first convex arc wall 15 and a second convex arc wall 16, respectively. The above-mentioned first convex arc wall 15 is provided on the inner surface of the annular expansion flange 12 near one end head of the C-shaped ring accommodating tank 14 of the annular side wall 11. The above-mentioned second convex arc wall 16 is provided on the inner surface of the annular lower side wall 13 at the other end head of the C-shaped ring accommodating tank 14, and the upper edge of the cup body 2 is tightened and sealed via the C-shaped ring accommodating tank 14 and the first convex arc wall 15 and the second convex arc wall 16 at both end heads of the C-shaped ring accommodating tank 14.

[0015] 3 and 3D space coordinates, a vertical perpendicular line V extends in the Z-axis direction from the center point C of the C-shaped ring accommodating tank 14. A horizontal line E extends in the X-axis direction from the center point C of the C-shaped ring accommodating tank 14. The outermost vertex of the first convex arc wall 15 is vertex P, and the outermost vertex of the second convex arc wall 16 is vertex Q. The line connecting the vertex P of the first convex arc wall 15 and the center point C of the C-shaped ring accommodating tank 14 is a connecting line L, and the line connecting the vertex Q of the second convex arc wall 16 and the center point C of the C-shaped ring accommodating tank 14 is a connecting line K. With the center point C of the C-shaped ring accommodating tank 14 as a reference, the included angle θ formed by the connecting line L and the connecting line K is smaller than 180 degrees, and is formed in a horn shape, so that the outer hoop 21 is tightened in the C-shaped ring accommodating tank 14, thereby achieving the effect of fastening and sealing.

[0016] Explaining based on the directions and three-dimensional space coordinates shown in FIG. 4, a central axis U is provided at the center of the central sealing surface 10 of the above-mentioned cup lid 1, and a horizontal line G extends in the X-axis direction from the outer surface of the highest vertex of the central sealing surface 10. The vertical distance from the horizontal line G extending from the outer surface of the highest vertex of the central sealing surface 10 to the outermost vertex P of the first convex arc wall 15 is distance A. The vertical distance from the horizontal line G extending from the outer surface of the highest vertex of the central sealing surface 10 to the outermost vertex Q of the second convex arc wall 16 is distance B. The vertical distance A is smaller than the vertical distance B. The horizontal distance from the central axis U of the central sealing surface 10 to the outermost vertex P of the first convex arc wall 15 is distance M. The horizontal distance from the central axis U of the central sealing surface 10 to the outermost vertex Q of the second convex arc wall 16 is distance N. The horizontal distance M is smaller than the horizontal distance N.

[0017] When the cup lid 1 is fitted into the cup body 2 from top to bottom, the annular lower wall 13 and the second convex wall 16 of the cup lid 1 are fitted downwards in contact with the cup body 2 in order. The upper edge of the cup body 2 of the present invention is an outer hoop 21 formed by rolling a thin piece, as described in the embodiment shown in FIG. 3. The outer hoop 21 of the cup body 2 is slightly deformed when pressed by the second convex wall 16 of the cup lid 1. The outer hoop 21 continues along the surface of the second convex wall 16 and along the inner surface of the cup lid 1 to the C-shaped ring receiving tank 14, and when the outer hoop 21 of the cup body 2 is completely received in the C-shaped ring receiving tank 14, they are tightly fitted together and there is no gap. The first convex wall 15 of the cup lid 1 is fitted into the inner surface 22 of the outer hoop 21 of the cup body 2. The second convex wall 16 of the cup lid 1 is fitted into the outer surface 23 of the outer hoop 21 of the cup body 2. 2 to 4. When the outer hoop 21 of the cup body 2 and the C-shaped ring receiving tank 14 of the cup lid 1 are joined together, the second convex arc wall 16 is located on the outer surface 23 of the outer hoop 21 of the cup body 2, and the diameter of the second convex arc wall 16 is reduced toward the inside, and a first external force F1 is generated when the second convex arc wall 16 is abutted against the outer surface 23 of the outer hoop 21 of the cup body 2. When the first convex arc wall 15 is abutted against the inner surface 22 of the outer hoop 21 of the cup body 2, a second external force F2 is generated. That is, there is a difference in distance between the first convex arc wall 15 and the second convex arc wall 16. The first convex arc wall 15 and the second convex arc wall 16 simultaneously generate acting forces on the inner surface 22 and the outer surface 23 of the outer hoop 21 of the cup body 2, so that the strength of the cup lid 1 is increased by the structural design of the first convex arc wall 15 and the second convex arc wall 16, and the cup lid 1 is not deformed even when subjected to an external force, and the effect of fastening and sealing can be achieved.

[0018] In summary, the molded pulp cup cover 1 with the fastenable cup body 2 provided by the present invention is formed into an integral cup cover 1 by using a molded pulp molding technique. A C-shaped ring receiving tank 14 is formed on the inner surface of the arc-shaped bent portion between the annular expansion flange 12 and the annular lower side wall 13 of the cup cover 1. A first convex arc wall 15 is provided on the inner surface of the annular expansion flange 12 near one end head of the C-shaped ring receiving tank 14 of the annular side wall 11. A second convex arc wall 16 is provided on the inner surface of the annular lower side wall 13 at the other end head of the C-shaped ring receiving tank 14, and the C-shaped ring receiving tank 14 and the first convex arc wall 15 and the second convex arc wall 16 at both end heads of the C-shaped ring receiving tank 14 fasten and seal the upper edge of the cup body 2, thereby achieving the effect of fastening and sealing. [Explanation of symbols]

[0019] 1 cup lid 10 Central sealing surface 11 Annular side wall 12 Annular expansion flange 13 Annular lower side wall 14 C-shaped ring tank 15 First Convex Arc Wall 16 Second convex wall 2 Cup Body 21 Outer hoop 22 Inner surface 23 External surface 3 cup lids 31 Engagement part 4 Cup Body 41 Outer hoop C center point V Vertical perpendicular line E horizontal line P Vertex Q Vertex L Connection line K Connection line θ angle U central axis G horizontal line A Distance B distance M distance N Distance F1 First external force F2 First external force

Claims

1. A molded pulp cup that can be fastened to a cup body, the cup body having an outer hoop formed by rolling a thin piece on an upper edge thereof, a cup lid having a central sealing surface, an annular side wall extending downwardly from an outer edge of the central sealing surface, an annular extension flange extending in a horizontal direction from an end of the annular side wall, the annular extension flange being bent in an arc shape to form an annular lower wall facing vertically downward, a C-shaped ring receiving tank being formed on an inner surface of a portion of the cup lid that is bent in an arc shape between the annular extension flange and the annular lower wall, and convex arc walls being provided on both end heads of the C-shaped ring receiving tank, the cup lid being capable of fastening the outer hoop of the cup body to achieve a sealing effect.

2. 2. The molded pulp cup according to claim 1, wherein the cup lid is integrally formed with the cup body by a pulp molding technique using pulp fiber material.

3. The molded pulp cup that can be fastened to a cup body as described in claim 1, characterized in that each of the convex arc walls is a first convex arc wall and a second convex arc wall, the first convex arc wall is protrudingly provided on the inner surface of the annular expansion flange near one end head of the C-shaped ring accommodating tank of the annular side wall, and the second convex arc wall is protrudingly provided on the inner surface of the annular lower side wall at the other end head of the C-shaped ring accommodating tank, and the upper edge of the cup body can be fastened and sealed via the C-shaped ring accommodating tank and the first convex arc wall and the second convex arc wall at both end heads of the C-shaped ring accommodating tank.

4. 4. The molded pulp cup that can be fastened to a cup body as described in claim 3, wherein a vertical perpendicular line V extends in the Z-axis direction to a center point C of the C-shaped ring accommodating tank, a horizontal line E extends in the X-axis direction to a center point C of the C-shaped ring accommodating tank, an outermost vertex of the first convex arc wall is vertex P, an outermost vertex of the second convex arc wall is vertex Q, a line connecting the vertex P of the first convex arc wall to the center point C of the C-shaped ring accommodating tank is a connection line L, a line connecting the vertex Q of the second convex arc wall to the center point C of the C-shaped ring accommodating tank is a connection line K, and an included angle θ formed by the connection line L and the connection line K based on the center point C of the C-shaped ring accommodating tank is less than 180 degrees and is formed in an angular shape so that the outer hoop is fastened to the C-shaped ring accommodating tank.

5. 4. The molded pulp cup according to claim 3, characterized in that a central axis U is provided at the center of the central sealing surface of the cup lid, a horizontal line G extends in the X-axis direction from the outer surface of the highest vertex of the central sealing surface, the outermost vertex of the first convex arc-shaped wall is vertex P, and the outermost vertex of the second convex arc-shaped wall is vertex Q, a vertical distance from the horizontal line G extending from the outer surface of the highest vertex of the central sealing surface to the outermost vertex P of the first convex arc-shaped wall is distance A, a vertical distance from the horizontal line G extending from the outer surface of the highest vertex of the central sealing surface to the outermost vertex Q of the second convex arc-shaped wall is distance B, the vertical distance A is smaller than the vertical distance B, a horizontal distance from the central axis U of the central sealing surface to the outermost vertex P of the first convex arc-shaped wall is distance M, a horizontal distance from the central axis U of the central sealing surface to the outermost vertex Q of the second convex arc-shaped wall is distance N, and the horizontal distance M is smaller than the horizontal distance N.

6. 6. The molded pulp cup that can be fastened to a cup body as described in claim 5, characterized in that when the cup lid is connected to the cup body, when the outer hoop of the cup body and the C-shaped ring receiving tank of the cup lid are connected, the second convex arc wall is located on the outer surface of the outer hoop of the cup body and the diameter thereof decreases toward the inside, and a first external force is generated when the first convex arc wall abuts against the outer surface of the outer hoop of the cup body, and a second external force is generated when the first convex arc wall abuts against the inner surface of the outer hoop of the cup body, there is a distance difference between the first convex arc wall and the second convex arc wall, and the first convex arc wall and the second convex arc wall simultaneously generate acting forces on the inner and outer surfaces of the outer hoop of the cup body.

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