can body and two pieces of can

Abstract

The application provides a can body and a two-piece can, and relates to the field of two-piece can technology. The can body provided by the application comprises a can body and a can bottom plate. The can body is a cylinder body, and the cylinder body has a first opening and a second opening. The can bottom plate is connected with one end of the cylinder body to close the first opening or the second opening. The can body and the can bottom plate surround a containing cavity for containing articles. The can bottom plate is provided with a connecting part which is connected with the containing cavity and the external environment. The traditional two-piece can only relies on a single opening, such as a top easy-open cover, to output materials. When pouring, a low-pressure area is formed in the containing cavity, which hinders the continuous outflow of the articles. The application constructs a second passage through the connecting part of the can bottom plate, so that external air can flow into the containing cavity synchronously during pouring, and the internal and external air pressure difference is dynamically balanced. The resistance threshold when the articles flow out is significantly reduced, and the pouring smoothness is greatly improved.

Description

Technical Field

[0001] This application relates to two-piece can technology, and more particularly to a can body and a two-piece can. Background Technology

[0002] A two-piece can refers to a packaging can consisting of a can body and a can lid. The can body of a two-piece can is manufactured by punching, stamping, stretching, and thinning thin metal sheets, which can achieve good sealing performance.

[0003] In related technologies, items are placed inside the containment cavity of two cans. However, in some application scenarios, the air pressure affects the relationship between the items and the inner wall of the containment cavity, resulting in greater resistance when the two cans are tilted, leading to a poor user experience. Utility Model Content

[0004] In view of this, this application provides a can body and a two-piece can, which aims to improve the smoothness of pouring items from the two-piece can.

[0005] To achieve the above objectives, this application provides a tank body and a two-piece tank, employing the following technical solution:

[0006] In a first aspect, this application provides a can body, comprising:

[0007] A tank body, wherein the tank body is a cylindrical body, and the cylindrical body has a first opening and a second opening;

[0008] A bottom plate is connected to one end of the cylinder to close the first opening or the second opening. The cylinder and the bottom plate form a receiving cavity for holding an item.

[0009] The bottom plate of the tank is provided with a connecting part, which connects the receiving cavity and the external environment.

[0010] In one possible implementation, the tank body provided in this application has a through hole for the connecting portion.

[0011] In one possible implementation, the tank body provided in this application has a connecting part that is a connecting pipe, the first end of which is connected to the receiving cavity, and the second end of which is used to connect to the external environment.

[0012] In one possible implementation, the tank body provided in this application has the through hole coaxial with the tank bottom plate, or the extension direction of the through hole is parallel to the thickness direction of the tank bottom plate.

[0013] In one possible implementation, the can body provided in this application further includes a sealing element, which is bonded to the bottom plate of the can away from the receiving cavity to seal the through hole.

[0014] In one possible implementation, the can body provided in this application has the inner diameter of the through hole set to be greater than or equal to 1 mm and less than or equal to 5 mm.

[0015] In one possible implementation, the tank body provided in this application further includes a plurality of protrusions, a portion of the tank bottom plate is connected to the bottom end of the cylinder, the protrusions connect the bottom end of the cylinder and another portion of the tank bottom plate, and the protrusions protrude toward the side away from the tank bottom plate;

[0016] The protrusion has a groove on the side facing the tank body, and the groove communicates with the receiving cavity of the tank body.

[0017] In one possible implementation, the can body provided in this application has a plurality of protrusions, with four of the protrusions arranged circumferentially at equal intervals around the central axis of the can body.

[0018] In one possible implementation, the tank body provided in this application has a uniform thickness;

[0019] In the height direction of the tank, the first opening is located above the second opening, and the bottom plate of the tank and the protrusion together close the second opening;

[0020] The inner diameter of the first opening is greater than the inner diameter of the second opening, and / or the inner diameter of the first opening is greater than or equal to 30 mm and less than or equal to 35 mm.

[0021] The inner diameter of the second opening is greater than or equal to 23 mm and less than or equal to 27 mm.

[0022] Secondly, this application provides a two-piece can, including a connected easy-open lid and a can body as described above, wherein the easy-open lid closes a first opening in the can body.

[0023] The can body and two-piece can provided in this application include a can body and a bottom plate. The can body is cylindrical and has a first opening and a second opening. The bottom plate is connected to one end of the cylindrical body to close the first or second opening. The can body and the bottom plate form a cavity for containing items. A connecting part is provided on the bottom plate, which connects the cavity to the external environment. Traditional two-piece cans rely on only a single opening, such as a top easy-open lid, for material output. When tilted, a low-pressure zone is formed in the cavity, hindering the continuous flow of items. This application constructs a second passage through the connecting part of the bottom plate, allowing outside air to flow into the cavity simultaneously during tilting, dynamically balancing the pressure difference between the inside and outside. This significantly reduces the resistance threshold when items flow out and greatly improves the smoothness of tilting.

[0024] In addition to the technical problems solved by the embodiments of this application, the technical features constituting the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions described above, other technical problems that can be solved by the technical solutions provided by this application, other technical features contained in the technical solutions, and the beneficial effects brought about by these technical features will be further described in detail in the specific embodiments. Attached Figure Description

[0025] The specific embodiments of this application are described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for illustration and explanation of this application, and this application is not limited to the specific embodiments described below.

[0026] Figure 1 Schematic cross-sectional view of the tank body provided in the embodiments of this application Figure 1 ;

[0027] Figure 2 Schematic cross-sectional view of the tank body provided in the embodiments of this application Figure 2 ;

[0028] Figure 3 This is a schematic diagram of the tank body when tilted, provided in an embodiment of this application.

[0029] Figure 4 This is a schematic diagram of the tank body provided in an embodiment of this application;

[0030] Figure 5 This is a schematic diagram of the internal structure of the tank body provided in an embodiment of this application;

[0031] Figure 6 for Figure 5 A magnified structural diagram of part A in the middle.

[0032] Explanation of reference numerals in the attached figures:

[0033] 10. Support surface; 100. Tank body; 101. Receiving cavity; 102. First opening; 103. Second opening; 200. Tank bottom plate; 300. Protrusion; 301. Base point; 302. Groove; 310. First arc segment; 320. Second arc segment; 400. Connecting part; 401. Through hole; 402. Connecting pipe; 500. Sealing element.

[0034] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application. The embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0036] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0037] In the description of the embodiments of this application, it should be understood that the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0038] In the description of the embodiments of this application, "a plurality of" means two or more, unless otherwise specified precisely.

[0039] The terms "first," "second," "third," "fourth," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0040] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such that a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or apparatus.

[0041] Two-piece cans are packaging cans consisting of a can body and a can lid. The can body is manufactured by punching, stamping, stretching, and thinning thinning thin metal sheets, achieving good sealing performance. Currently, two-piece cans on the market are usually made of tinplate, with an expansion ring at the bottom of the can body and a top lid, forming tinplate two-piece cans with similar shapes, and are used for low- to mid-range products. In related technologies, items are placed inside the can's containment cavity. However, in some applications, the air pressure between the item and the inner wall of the containment cavity causes greater resistance when tilting the can, resulting in a poor user experience. For example, when the containment cavity contains a gel-like or highly viscous item, such as a frozen item, traditional two-piece cans rely on a single opening, such as a top easy-open lid, for material output. When tilting, a low-pressure zone forms between the item and the inner wall of the can, hindering continuous fluid flow. Users need to maintain a tilting posture for a long time until the item is poured out, resulting in a poor user experience.

[0042] To address the aforementioned technical problems, this application provides a can body and a two-piece can. In this solution, the can body includes a can shell and a bottom plate. The can shell is cylindrical, with a first opening and a second opening. The bottom plate is connected to one end of the cylindrical shell to close either the first or second opening. The can shell and bottom plate form a cavity for containing items. A connecting portion is provided on the bottom plate, connecting the cavity to the external environment. Traditional two-piece cans rely on a single opening, such as a top easy-open lid, for material output. During pouring, a low-pressure zone forms within the cavity, hindering continuous flow of items. This application constructs a second passage through the connecting portion of the bottom plate, allowing outside air to flow into the cavity simultaneously during pouring, dynamically balancing the pressure difference between the inside and outside. This significantly reduces the resistance threshold when items flow out, greatly improving the smoothness of pouring.

[0043] It should be noted that, Figures 1 to 6 This diagram illustrates a simplified representation of the can body and the components within the two can sections. The specific structures of the remaining components within the can body and the two can sections are not limited to these examples. Figures 1 to 6 of examples.

[0044] The present application will now be described in detail with reference to the accompanying drawings and specific embodiments:

[0045] Reference Figure 1 , Figure 2 and Figure 3 As shown in the embodiment of this application, a can body is provided, including a can body 100 and a can bottom plate 200. The can body 100 is a cylindrical body with a first opening 102 and a second opening 103. The can bottom plate 200 is connected to one end of the cylindrical body to close the first opening 102 or the second opening 103. The can body 100 and the can bottom plate 200 form a receiving cavity 101 for containing articles. A connecting part 400 is provided on the can bottom plate 200, which connects the receiving cavity 101 and the external environment.

[0046] Traditional two-piece cans rely on a single opening, such as a top easy-open lid, for material output. During tilting, a low-pressure zone forms within the receiving cavity 101, hindering continuous flow of the contents. This application constructs a second passage through the connecting portion 400 of the can bottom plate 200, allowing outside air to simultaneously flow into the receiving cavity 101 during tilting, dynamically balancing the internal and external air pressure difference. This significantly reduces the resistance threshold when the contents flow out, greatly improving the smoothness of tilting.

[0047] In the above embodiment, the bottom plate 200 can close the second opening 103, that is, the bottom plate 200 closes the bottom of the can body 100. The contents of the receiving cavity 101 can be poured out of the receiving cavity 101 through the first opening 102.

[0048] In one possible implementation, refer to Figure 1 As shown, the connecting part 400 is a through hole 401. One end of the through hole 401 is connected to the receiving cavity 101, and the other end of the through hole 401 is connected to the external environment. The through hole 401 can be formed by stamping. The structure is simple, easy to manufacture, and reduces manufacturing costs.

[0049] In one possible implementation, refer to Figure 2 As shown, the connecting part 400 is a connecting pipe 402. The first end of the connecting pipe 402 is connected to the receiving cavity 101, and the second end of the connecting pipe 402 is used to connect to the external environment. In specific implementation, the connecting pipe 402 can be glued into the through hole of the tank bottom plate 200 or directly welded into the through hole of the tank bottom plate 200. By setting the connecting pipe 402, corrosion of the tank bottom plate 200 can be reduced.

[0050] In one possible implementation, the through hole 401 is coaxial with the tank bottom plate 200, or the extending direction of the through hole 401 is parallel to the thickness direction of the tank bottom plate 200.

[0051] In the above embodiment, the through hole 401 is coaxial with the bottom plate 200, which means that the through hole 401 is located at the center of the bottom plate 200. This allows the gas in the external environment to quickly diffuse into the receiving cavity 101, facilitating the rapid balance of air pressure inside the receiving cavity 101 and the external environment, and further facilitating the removal of items from the can. Furthermore, the extension direction of the through hole 401 is parallel to the thickness direction of the bottom plate 200, which helps to shorten the length of the through hole 401, allowing the external gas to diffuse into the receiving cavity 101 quickly via the shortest path.

[0052] In one possible implementation, refer to Figure 1 and Figure 2As shown, the can also include a sealing element 500, which is bonded to the side of the can bottom plate 200 away from the receiving cavity 101 to seal the through hole 401. Here, the sealing element 500 can be an easy-tear tape, which is bonded to the can bottom plate 200 and seals the through hole 401. Before pouring out the contents, the easy-tear tape is first removed to facilitate quick and easy equalization of internal and external air pressure, making it easier to remove the contents from the can.

[0053] The inner diameter of the through hole 401 is set to be greater than or equal to 1 mm and less than or equal to 5 mm. Specifically, the inner diameter of the through hole 401 can be any one of 1 mm, 1.1 mm, 2 mm, 4 mm, 4.9 mm, and 5 mm. If the inner diameter of the through hole 401 is too small, the effect of balancing air pressure will be weakened; if the inner diameter of the through hole 401 is too large, it will cause leakage of the item and will also be detrimental to the sealing of the seal 500.

[0054] In one possible implementation, refer to Figure 3 , Figure 4 , Figure 5 and Figure 6 The can body provided in this application embodiment also includes multiple protrusions 300. The protrusions 300 connect the bottom end of the cylinder body and another part of the can bottom plate 200. The protrusions 300 protrude towards the side opposite to the can bottom plate 200. The end of the protrusion 300 is configured as a base point 301. The connecting line of two adjacent base points 301 on two adjacent protrusions 300 is configured to be parallel to the support surface 10 of the can body. It should be noted that the aforementioned support surface 10 is the support surface 10 of the can body. The support surface 10 is usually a plane. In actual application scenarios, the support surface 10 can be a table, countertop, floor, cabinet, windowsill, or any other location where two cans can be placed.

[0055] In practice, the tank body 100, the tank bottom plate 200, and the protrusion 300 are integrally formed. They can be manufactured by designing molds and using processes such as blanking, cupping, stretching, and thinning of the metal sheet, which helps to improve the stability and sealing of the structure.

[0056] In the above embodiment, the tank bottom plate 200 is a flat plate structure. To improve the aesthetics and smoothness of the structural lines, the connection between the tank bottom plate 200 and the tank body 100 is a smooth transition connection, the connection between the tank bottom plate 200 and the protrusion 300 is a smooth transition connection, and the connection between the protrusion 300 and the tank bottom plate 200 is a smooth transition connection. By providing at least two protrusions 300, a discontinuous expansion ring is formed at the bottom of the tank body. The connecting line of the two adjacent base points 301 on two adjacent protrusions 300 is parallel to the support surface 10 of the tank body, as shown in the figure. Figure 3As shown, when the can is tilted, at least two base points 301 simultaneously contact the support surface 10 of the can. Compared with the traditional continuous expansion ring at the bottom, this increases the number of support points, making it easier to tilt the contents of the can and improving the stability of the can.

[0057] In one possible implementation, refer to Figure 4 and Figure 5 As shown, a groove 302 is provided on the side of the protrusion 300 facing the can body 100, and the groove 302 communicates with the receiving cavity 101 of the can body 100. It should be noted that the can body 100, the bottom plate 200, and the protrusion 300 can together form the receiving cavity 101, which is used to hold items. The groove 302 can be a recessed groove 302 on the side opposite to the can body 100.

[0058] In the above embodiments, the smooth curved surface of a traditional can bottom easily traps liquid, especially high-viscosity media. By setting the groove 302, the contact angle of the liquid surface is changed, disrupting the surface tension balance and reducing the amount of residue. Furthermore, by setting the groove 302 to communicate with the receiving cavity 101, when items are placed in the receiving cavity 101, the groove 302 balances the air pressure inside the receiving cavity 101. Alternatively, if the items cover part of the structure of the groove 302, when the items are poured out, the gas inside the receiving cavity 101 can enter the interior of the groove 302 through other positions of the groove opening, quickly balancing the air pressure between the groove 302 and the receiving cavity 101, facilitating the pouring of items.

[0059] In one possible implementation, refer to Figure 4 and Figure 6 As shown, the protrusion 300 includes a first arc-shaped segment 310 and a second arc-shaped segment 320 connected to each other. In a plane parallel to the bottom plate 200 of the tank, the center of the first arc-shaped segment 310 and the center of the second arc-shaped segment 320 are both located within the central axis of the bottom plate 200 of the tank body 100.

[0060] The outer edge of the first arc segment 310, away from the axis of the tank bottom plate 200, is smoothly connected to the tank body 100, and the inner edge of the second arc segment 320, close to the axis of the tank bottom plate 200, is smoothly connected to the tank bottom plate 200.

[0061] In the above embodiment, the first arc segment 310 and the second arc segment 320 share the same center in a plane parallel to the tank bottom plate 200, forming a nested stress-bearing structure to avoid sudden changes in local stress. This improves the fatigue life of the protrusion 300. The smooth connection between the outer edge of the first arc segment 310 and the tank body 100 eliminates stress peaks at traditional right-angle connections; the smooth connection between the inner edge of the second arc segment 320 and the curved surface of the tank bottom plate 200 avoids weak defects at welding or riveting points.

[0062] In one possible implementation, please continue to refer to Figure 6As shown, the first arc segment 310 protrudes toward the side away from the bottom plate 200 of the tank, and the end of the first arc segment 310 and the point furthest from the bottom plate 200 of the tank is configured as the base point 301.

[0063] In the above embodiment, the base point 301 is set at the maximum displacement of the first arc segment 310, that is, the point farthest from the bottom plate 200 of the tank, making this point the main load-bearing point. Since this position is at the geometric highest point of the first arc segment 310, the tensile strength characteristics of the material can be fully utilized to transform the concentrated load into distributed stress along the arc.

[0064] In one possible implementation, within the plane containing the central axis of the can bottom plate 200, the second arc-shaped segment 320 slopes towards the can bottom plate 200 from the inner edge of the first arc-shaped segment 310. This allows the bottom surface of the groove 302 to form an inclined surface, preventing the item from completely covering the opening of the groove 302, and further facilitating the balance of air pressure between the groove 302 and the receiving cavity 101.

[0065] In one possible implementation, the number of protrusions 300 is set to four, and the four protrusions 300 are evenly spaced around the central axis of the tank body 100.

[0066] In the above embodiment, four protrusions 300 are evenly spaced circumferentially to form a regular cross-shaped support array. This four-point support ensures that the center of gravity of the can 100 remains within the support polygon, significantly improving static stability. During tilting, the four protrusions 300 automatically adjust their contact sequence according to the tilt angle, forming a continuous dynamic support chain. Alternatively, this can be understood as providing support at least two base points 301 when tilting items at multiple angles and directions, further enhancing the stability of the can. Furthermore, the four protrusions 300 also improve aesthetics, giving the product a more three-dimensional and refined appearance, facilitating the tilting of items inside, and highlighting the product's sophisticated and high-end characteristics.

[0067] In one possible implementation, each protrusion 300 protrudes by the same distance toward the side facing away from the bottom plate 200, such as... Figure 6 As shown, H represents the distance by which the protrusion 300 protrudes towards the side opposite to the bottom plate 200 of the tank. The distance by which the protrusion 300 protrudes towards the side opposite to the bottom plate 200 of the tank is greater than or equal to 1.2 mm and less than or equal to 1.4 mm. The distance by which the protrusion 300 protrudes towards the side opposite to the bottom plate 200 of the tank can be set to any one of 1.2 mm, 1.21 mm, 1.3 mm, 1.39 mm, and 1.4 mm.

[0068] In the above embodiments, the protrusion distance of each protrusion 300 is consistent, ensuring a balanced distribution of vertical load at each support point. By setting the protrusion amount of the protrusions 300, the stability of the production process can be significantly enhanced, avoiding mold wear caused by excessive stretching.

[0069] In one possible implementation, the protrusion 300 protrudes a greater distance toward the side opposite to the bottom plate 200 than the distance the connecting pipe 402 protrudes from the bottom plate 200, so as to avoid the connecting pipe 402 interfering with the horizontal placement of the tank body.

[0070] In one possible implementation, the tank body 100 has a uniform thickness; the tank body 100 has a first opening 102 and a second opening 103, and in the height direction of the tank body 100, the first opening 102 is located above the second opening 103, and the tank bottom plate 200 and the protrusion 300 together close the second opening 103; the inner diameter of the first opening 102 is larger than the inner diameter of the second opening 103.

[0071] In practice, the inner diameter of the first opening 102 is greater than or equal to 30 mm and less than or equal to 35 mm.

[0072] The inner diameter of the second opening 103 is greater than or equal to 23 mm and less than or equal to 27 mm.

[0073] Specifically, the inner diameter of the first opening 102 can be any one of 30 mm, 31 mm, 31.5 mm, 34 mm, 34.9 mm, and 35 mm. The inner diameter of the second opening 103 can be any one of 23 mm, 24 mm, 24.5 mm, 26 mm, 26.9 mm, and 27 mm. The specific design can be tailored to actual needs.

[0074] Here, the inner diameter of the first opening 102 is larger than the inner diameter of the second opening 103, making the can 100 form a cone shape that is larger at the top and smaller at the bottom. This makes it easier for users to hold, making it more comfortable for them to pick up the can, reducing user fatigue, and improving the product's ergonomic design. Furthermore, it facilitates the removal of items from the can when emptying it.

[0075] In one possible implementation, this application also provides a two-piece can, including an easy-open lid (not shown in the figure) and the aforementioned can body, the easy-open lid closing the first opening 102 of the can body. The specific structure of the can body has been described above and will not be repeated here. This two-piece can facilitates the pouring of items inside and improves the stability of the can body. Specifically, the two-piece can can be made of metal to further enhance structural stability.

[0076] The implementation principle of the can body and two-piece can in this application embodiment is as follows: The can body includes a can body 100 and a can bottom plate 200. The can body 100 is a cylindrical body with a first opening 102 and a second opening 103. The can bottom plate 200 is connected to one end of the cylindrical body to close the first opening 102 or the second opening 103. The can body 100 and the can bottom plate 200 form a receiving cavity 101 for containing items. A connecting part 400 is provided on the can bottom plate 200, which connects the receiving cavity 101 to the external environment. Traditional two-piece cans rely on only a single opening, such as a top easy-open lid, for material output. When tilted, a low-pressure area is formed in the receiving cavity 101, hindering the continuous flow of items. This application constructs a second passage through the connecting part 400 of the can bottom plate 200, allowing outside air to flow into the receiving cavity 101 simultaneously during tilting, dynamically balancing the pressure difference between the inside and outside. This significantly reduces the resistance threshold when items flow out and greatly improves the smoothness of tilting.

[0077] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the application disclosed herein.

[0078] The embodiments in this application are intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed in this application. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of this application are indicated by the claims.

[0079] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A can body, characterized in that, include: The tank (100) is a cylindrical body, which has a first opening (102) and a second opening (103). A bottom plate (200) is connected to one end of the cylinder to close the first opening (102) or the second opening (103). The cylinder (100) and the bottom plate (200) form a receiving cavity (101) for holding articles. A connecting part (400) is provided on the bottom plate (200) of the tank, and the connecting part (400) connects the receiving cavity (101) and the external environment.

2. The can body of claim 1 wherein, The connecting part (400) is a through hole (401).

3. The can body of claim 1 wherein, The connecting part (400) is a connecting pipe (402), the first end of the connecting pipe (402) is connected to the receiving cavity (101), and the second end of the connecting pipe (402) is used to connect to the external environment.

4. The tank body according to claim 2, characterized in that, The through hole (401) is coaxial with the bottom plate (200) of the tank, or the extension direction of the through hole (401) is parallel to the thickness direction of the bottom plate (200).

5. The can body of claim 4 wherein, The tank body also includes a sealing element (500), which is bonded to the side of the tank bottom plate (200) away from the receiving cavity (101) to seal the through hole (401).

6. The can body of claim 5 wherein, The inner diameter of the through hole (401) is set to be greater than or equal to 1 mm and less than or equal to 5 mm.

7. The can body defined in any one of claims 1 to 6 wherein, The tank body also includes a plurality of protrusions (300), a portion of the tank bottom plate (200) is connected to the bottom end of the cylinder, the protrusions (300) connect the bottom end of the cylinder and another portion of the tank bottom plate (200), and the protrusions (300) protrude toward the side away from the tank bottom plate (200); The protrusion (300) has a groove (302) on the side facing the tank (100), and the groove (302) is connected to the receiving cavity (101) of the tank (100).

8. The can body of claim 7 wherein, The number of the protrusions (300) is set to multiple, and the four protrusions (300) are evenly spaced around the central axis of the tank (100).

9. The can body of claim 7 wherein, The tank body (100) has a uniform thickness; In the height direction of the tank body (100), the first opening (102) is located above the second opening (103), and the bottom plate (200) and the protrusion (300) together close the second opening (103). The inner diameter of the first opening (102) is greater than the inner diameter of the second opening (103), and / or the inner diameter of the first opening (102) is greater than or equal to 30 mm and less than or equal to 35 mm. The inner diameter of the second opening (103) is greater than or equal to 23 mm and less than or equal to 27 mm.

10. A two-piece can characterized by, It includes a connected easy-open lid and a can body as described in any one of claims 1 to 9, wherein the easy-open lid closes a first opening (102) of the can body.

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