Reverse bottom structure of a container
By setting an inwardly bent connecting wall at the bottom of the container shell to form a recessed cavity, and the container bottom is tightly fitted and fixed, the problems of low processing efficiency and poor aesthetics in the prior art are solved, realizing an efficient assembly and aesthetically pleasing container connection structure, and enhancing the heat preservation and anti-scalding performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG HAERS VACUUM CONTAINERS CO LTD
- Filing Date
- 2025-07-01
- Publication Date
- 2026-06-19
Smart Images
Figure CN224369524U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of container technology, and in particular relates to an inverted bottom structure for a container. Background Technology
[0002] A container typically consists of a body and a bottom, with the bottom fixedly attached to the lower end of the body.
[0003] Taking a water cup as an example, the connection between the cup body and the bottom is generally achieved by welding the open end of the bottom to the open end of the cup body. This structure is more suitable for structures with a straight bottom end, and the processing requirements for the welding are relatively high, resulting in relatively low processing efficiency and cost. Another structure is to press the bottom of the cup to fit tightly to the bottom of the cup body. However, this type of cup has a seam between the bottom and the body, and this seam is prone to unevenness, which can cause the user's hand to feel scratchy during use, resulting in an unsatisfactory user experience and aesthetics. Summary of the Invention
[0004] To solve the above-mentioned technical problems, this utility model provides a reverse bottom structure for a container, which is efficient and easy to assemble, and the container is also aesthetically pleasing.
[0005] To achieve the above objectives, the present invention adopts the following technical solution.
[0006] A container with an inverted bottom structure includes a shell and a container bottom. The bottom of the shell is open and has a connecting part that extends radially inward. The connecting part has a connecting wall that bends inward. The connecting wall forms a recessed cavity. The container bottom is placed downward in the recessed cavity, and its sidewall is tightly fitted and fixedly connected to the connecting wall.
[0007] Preferably, the inner diameter of the connecting wall at the open end is not greater than the inner diameter of its inner end; the outer diameter of the bottom end of the side wall is not greater than the outer diameter of its open end; and the outer diameter of the bottom end of the side wall is greater than the inner diameter of the opening end of the connecting wall.
[0008] Preferably, both the connecting wall and the side wall are vertically arranged; the outer diameter of the side wall is larger than the inner diameter of the connecting wall.
[0009] Preferably, the connecting wall is an inclined surface with an inner diameter that gradually increases from the open end to the inner end; the side wall is an inclined surface with an outer diameter that gradually increases from the bottom end to the open end.
[0010] Preferably, the container also includes an inner shell; one end of the inner shell is open, and its open end is welded to the mouth of the outer shell; the outer shell, the container bottom and the inner shell form a heat insulation layer.
[0011] Preferably, the container also includes an inner bottom welded to the bottom opening of the shell; the shell, inner shell and inner bottom form a vacuum layer; the bottom of the container is located on the outside of the inner bottom.
[0012] Preferably, the connecting wall extends radially inward and bends upward to form a welded wall; the opening of the inner bottom faces upward, and its surrounding wall abuts against and is welded to the welded wall.
[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: By adopting the above technical solution, a recessed cavity is formed by setting an inwardly bent connecting wall at the bottom opening of the shell, and the bottom of the container can be tightly fitted into the recessed cavity. At this time, the bottom of the container can be efficiently press-fitted to the bottom of the container without welding, and the bottom of the container does not need to be covered by the outer wall of the shell, thus avoiding seams that affect the aesthetics; and as shown in the appendix Figure 1-5 It can also be seen that under this structure, the curvature of the bottom of the shell can be set to be very large, but it is not easy to achieve if the existing technology is used, and there are process problems in production and processing.
[0014] Further beneficial effects include: setting the inner diameter of the connecting wall at the open end to be no greater than the inner diameter of its inner end; setting the outer diameter of the bottom end of the side wall to be no greater than the outer diameter of its open end; and setting the outer diameter of the bottom end of the side wall to be greater than the inner diameter of the open end of the connecting wall. Specifically, in the first embodiment, the connecting wall and the side wall can be vertically arranged. In the second embodiment, the connecting wall can be a sloped surface with an inner diameter that gradually increases from the open end to the inner end; and the side wall can be a sloped surface with an outer diameter that gradually increases from the bottom end to the open end. This structure facilitates a tight fit and fixed connection between the container bottom and the connecting wall. In particular, the second embodiment also has the effect of preventing the container bottom from falling off. If the inner diameter of the open end of the connecting wall is smaller than the inner diameter of the inner end, there may be a problem that the container bottom is prone to falling off.
[0015] Further beneficial effects include: to prevent burns, the container can be equipped with an inner shell to form a double-layer structure; to improve heat insulation, an inner bottom can be added and vacuumed to form a double-layer vacuum structure; and by having a surrounding wall and a welded wall fitted to the inner bottom, with the inner bottom opening facing upwards, the welding positions of the surrounding wall and the welded wall can be exposed for welding; at the same time, the container bottom being located on the outside of the inner bottom can cover the weld seam and the brazing material left on the inner bottom after vacuuming. Attached Figure Description
[0016] Figure 1 This is a cross-sectional structural diagram of Embodiment 1 of this utility model.
[0017] Figure 2 yes Figure 1 Enlarged view of point A.
[0018] Figure 3 This is a cross-sectional structural diagram of Embodiment 2 of this utility model.
[0019] Figure 4 yes Figure 3 Enlarged view of point B.
[0020] Figure 5It is a cross-sectional view of the shell and an enlarged view of point C.
[0021] Figure 6 This is a cross-sectional view of the bottom of the container.
[0022] Figure 7 This is a schematic diagram of the cross-sectional structure of the insole. Detailed Implementation
[0023] To make the technical solution of this utility model clearer, the following description is in conjunction with the appendix. Figures 1 to 7 This specification provides a detailed description of the present invention. It should be understood that the specific embodiments described herein are merely for explaining the present invention and are not intended to limit the scope of protection of the present invention. Example 1
[0024] A container with an inverted bottom structure, such as Figure 1 As shown, the container has a double-layer heat insulation structure, including a shell 1, a container bottom 2, and an inner shell 3. The shell 1 and the inner shell 3 are welded together at the opening, and the container bottom 2 is tightly fitted and fixed to the bottom of the shell 1. The shell 1, the container bottom 2, and the inner shell 3 together form a heat insulation layer.
[0025] Specifically, such as Figure 2 and 5 As shown, the bottom of the shell 1 is open and has a connecting part that extends radially inward; the connecting part is bent inward in the opposite direction by a reverse stretching process or a stamping and forming process to form a connecting wall 11 (therefore also called a reverse bottom structure), and the connecting wall 11 surrounds a recessed cavity 12; the container bottom 2 is placed in the recessed cavity 12, and its side wall 21 is tightly fitted and fixed to the connecting wall 11.
[0026] Furthermore, such as Figure 2 As shown, the sidewalls 21 of the connecting wall 11 and the container bottom 2 are both vertically arranged, and the outer diameter of the sidewall 21 is larger than the inner diameter of the connecting wall 11 so that the sidewall 21 can form an interference fit with the connecting wall 11. During installation, external force is required to press the container bottom 2 into the recessed cavity 12 for tight fit and fixation. Example 2
[0027] A container with an inverted bottom structure, such as Figure 3 As shown, the container has a double-layer vacuum structure, including a shell 1, a container bottom 2, an inner shell 3, and an inner bottom 4. The shell 1 and the inner shell 3 are welded together at the opening, and the inner bottom 4 is welded to the bottom opening of the shell 1. The interlayer formed by the shell 1, the inner shell 3, and the inner bottom 4 is evacuated by a vacuuming process. The container bottom 2 is tightly fitted and fixed to the bottom of the shell 1 and covers the outside of the inner bottom 4.
[0028] Specifically, such as Figure 4 and 5As shown, the bottom of the shell 1 is open and has a connecting part that extends radially inward; the connecting part is bent inward in the opposite direction by a reverse stretching process or a stamping and forming process to form a connecting wall 11, and the connecting wall 11 surrounds a recessed cavity 12; the container bottom 2 is placed in the recessed cavity 12, and its side wall 21 is tightly fitted and fixed to the connecting wall 11.
[0029] Furthermore, such as Figure 4 As shown, both the connecting wall 11 and the side wall 21 of the container bottom 2 are inclined surfaces; specifically, the connecting wall 11 is an inclined surface with an inner diameter that gradually increases from the open end to the inner end; the side wall 21 is an inclined surface with an outer diameter that gradually increases from the bottom end to the open end; this structure has a better advantage in preventing detachment compared to embodiment 1; after the container bottom 2 is assembled to the bottom of the shell 1, since the container bottom 2 is actually stretched outward, the outward direction of the container bottom 2 is actually blocked by the connecting wall 11, thus having the function of preventing detachment.
[0030] Specifically, such as Figure 4 and 5 As shown, the connecting wall 11 extends radially inward and bends upward to form a welded wall 13. The inner bottom 4 opens upward and is inserted into the welded wall 13. The surrounding wall 41 of the inner bottom 4 can be designed to fit tightly against the welded wall 13 (as long as there is no gap, it is convenient for welding). The tops of the surrounding wall 41 and the welded wall 13 can be designed to be flush, which is convenient for welding at the ends and facilitates the welding operation (of course, not being flush will not affect the welding).
Claims
1. A container bottom structure, comprising a shell (1) and a container bottom (2), characterized in that: The bottom of the housing (1) is open and has a connecting part that extends radially inward; The connecting part is provided with an inwardly bent connecting wall (11); The connecting wall (11) forms a recessed cavity (12); The bottom (2) of the container is placed downward in the recessed cavity (12), and its side wall (21) is tightly fitted and fixedly connected to the connecting wall (11).
2. The inverted bottom structure of a container according to claim 1, characterized in that: The inner diameter of the connecting wall (11) at the open end is not greater than the inner diameter of its inner end; The outer diameter of the bottom end of the sidewall (21) is not greater than the outer diameter of its open end; The outer diameter of the bottom end of the side wall (21) is greater than the inner diameter of the opening end of the connecting wall (11).
3. The inverted bottom structure of a container according to claim 2, characterized in that: Both the connecting wall (11) and the side wall (21) are vertically arranged; The outer diameter of the side wall (21) is larger than the inner diameter of the connecting wall (11).
4. The inverted bottom structure of a container according to claim 2, characterized in that: The connecting wall (11) is an inclined surface whose inner diameter gradually increases from the open end to the inner end; The sidewall (21) is an inclined surface whose outer diameter gradually increases from the bottom end to the opening end.
5. The inverted bottom structure of a container according to claim 1, characterized in that: The container also includes an inner shell (3); The inner shell (3) has an opening at one end, and its opening end is welded to the opening of the outer shell (1); The outer shell (1), the container bottom (2), and the inner shell (3) form a heat insulation layer.
6. The inverted bottom structure of a container according to claim 5, characterized in that: The container also includes an inner bottom (4) welded to the bottom opening of the shell (1); The outer shell (1), inner shell (3) and inner bottom (4) form a sandwich layer as a vacuum layer; The container bottom (2) is located on the outside of the inner bottom (4).
7. The inverted bottom structure of a container according to claim 6, characterized in that: The connecting wall (11) extends radially inward and bends upward to form a welded wall (13); The opening of the inner bottom (4) faces upward, and its surrounding wall (41) abuts against the welded wall (13) and is welded and fixed.