Tank cover
By designing a thickened shoulder ring, the problems of can lid deformation and detachment under stress were solved, thereby improving the strength of the can lid and increasing screening efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-02
- Publication Date
- 2026-04-07
AI Technical Summary
The existing can lids are prone to deformation under stress and are easy to fall off when adjacent cans are misaligned, affecting the screening efficiency of the screening machine.
A can lid was designed to increase its strength by thickening the shoulder ring and to prevent it from lifting when adjacent can lids are misaligned. The design employs a central shaft, ring wall, shoulder ring, and lid body structure, and increases the length of the shoulder ring to improve strength and prevent it from falling off.
It improves the strength of the can lid, prevents it from falling off during shrink film packaging, and increases the screening efficiency of the can lid screening machine.
Smart Images
Figure CN224090801U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to an accessory for a can; in particular, it relates to a can lid. Background Technology
[0002] Please refer to Figure 7 and Figure 8 As shown, the existing can A1 is equipped with a lid A2. The lid A2 is a two-tiered lid that is narrower at the top and wider at the bottom, with the space inside the lid A2 large enough to accommodate a folding spoon. However, this type of lid A2 lacks a structure to enhance its strength and is prone to deformation under stress. When packaging multiple cans A1 with lids A2, they are usually wrapped with shrink film, in which case the multiple cans A1 are arranged in pairs adjacent to each other.
[0003] When two adjacent cans A1 with lids A2 are misaligned, the upper edge of one lid A2 can easily hook onto the lower edge of the other lid A2. As the two adjacent cans A1 and their lids A2 are restored to their original positions, the lid A2 of one can A1 will lift one side of the lid A2 of the other can A1, causing the lids A2 on the multiple cans A1 to easily fall off.
[0004] In addition, such as Figure 9 and Figure 9A As shown, the existing can lid A2 houses the spoon at the top, resulting in a high center of gravity. When a can lid sorting machine M sorts multiple can lids A2 in different orientations, once can lid A2 is conveyed from the feed section M1 to the lifting section M2, if the top of the can lid A2 was originally facing upwards in the feed section M1, it will face outwards when entering the lifting section M2. This causes the center of gravity of the can lid A2 to fall outwards and be dropped from the lifting section M2. Through this mechanism, the can lid sorting machine M ensures that only can lids A2 with their tops facing inwards are successfully conveyed by the lifting section M2, thereby achieving the effect of sorting can lids A2 in a consistent orientation.
[0005] Although the aforementioned can lid sorting machine M has the ability to sort can lids, such as Figures 9 to 10 As shown, since the height of the shoulder A3 of the existing can lid A2 is less than half the height of the entire can lid A2, when two can lids A2 with different orientations are placed side by side, the two can lids A2 will hook each other with their respective shoulders A3. This means that when multiple can lids A2 are transported from the feeding section M1 to the climbing section M2 by the can lid screening machine M, one of the can lids A2 will fall due to its center of gravity facing outwards, and it will hook the other can lid A2, causing the other can lid A2 to fall as well. This results in a decrease in the screening efficiency of the can lid screening machine M. Summary of the Invention
[0006] The technical problem that the invention aims to solve
[0007] In view of this, the purpose of this utility model is to provide a can lid that, by increasing the peripheral surface of the can lid, not only improves the strength of the can lid, but also avoids the problem that when the can lids installed on two adjacent cans are misaligned and then restored to their original positions, one can lid is easily lifted by the other can lid and falls off the can.
[0008] To achieve the above objectives, this utility model provides a can lid having a central axis extending in a vertical direction, and including an annular wall, a shoulder ring, and a lid body. The annular wall is a circular ring concentric with the central axis, and its inner side has an inner circumferential surface. A protruding buckle is formed at the lower edge of the inner circumferential surface. The shoulder ring is a circular ring concentric with the central axis, and its upper and lower sides each have an upper annular surface and a lower annular surface, respectively. The inner side of the shoulder ring has an inner circumferential surface. The outer edge of the lower annular surface is connected to the upper edge of the annular wall. The cover includes a second annular wall and a cover plate; the second annular wall is a ring concentric with the central axis, the lower edge of the second annular wall is connected to the inner edge of the upper annular surface, the inner side of the second annular wall has an inner circumferential surface, the inner circumferential surface of the second annular wall is aligned with the inner circumferential surface of the shoulder ring along the direction extending from the central axis; the outer circumferential edge of the cover plate is connected to the upper edge of the inner circumferential surface of the second annular wall; the length between the upper annular surface and the lower annular surface along the direction extending from the central axis is greater than the length of the cover plate along the direction extending from the central axis.
[0009] The advantage of this invention is that by setting the length of the shoulder ring located between the upper annular surface and the lower annular surface along the central axis to be greater than the length of the cover plate along the central axis, the thickness of the shoulder ring relative to the cover plate is increased, thereby improving the strength of the can lid and making it less prone to deformation when subjected to external forces.
[0010] Furthermore, the increased thickness of the shoulder ring relative to the cover plate also raises the height of the upper annular surface relative to the ring wall. When two adjacent cans fitted with the lids of this invention are misaligned, the upper annular surface of one lid is less likely to snap onto the lower edge of the ring wall of the other lid. This ensures that during the process of restoring two adjacent cans from a misaligned state to their original side-by-side position, the lid of one can will not lift one side of the other lid, thus preventing the lids of multiple cans wrapped in shrink film from detaching from the cans during movement. Attached Figure Description
[0011] Figure 1 This is a perspective view of a preferred embodiment of the present invention.
[0012] Figure 2 for Figure 1 Top view.
[0013] Figure 3 for Figure 2 A cross-sectional view along the 3-3 direction.
[0014] Figure 4 for Figure 1 A bottom view.
[0015] Figure 5 This is a schematic diagram showing two adjacent cans with the lid of this utility model installed in a staggered manner.
[0016] Figure 5A for Figure 5 Enlarged view of the area marked 5A.
[0017] Figure 6 This is a schematic diagram of two of the present inventions placed in opposite positions.
[0018] Figure 7 This is a schematic diagram of two adjacent tanks, each with a lid, that are staggered vertically.
[0019] Figure 8 This is a diagram illustrating how the lid of an existing tank is lifted by the lid of another tank.
[0020] Figure 9 This is a schematic diagram illustrating the implementation of a can lid screening machine.
[0021] Figure 9A for Figure 9 Enlarged view of the area marked 9A.
[0022] Figure 10 This is a top view of the climbing section of a can lid screening machine.
[0023] Explanation of reference numerals in the attached figures
[0024] 100: Can lid
[0025] 10: Circumferential wall
[0026] 12: Inner circumferential surface of the ring wall
[0027] 14: Outer circumferential surface of the ring wall
[0028] 16: Protruding buckle part
[0029] 20: Shoulder ring
[0030] 22: Inner circumference of the shoulder ring
[0031] 24: Outer perimeter of the shoulder ring
[0032] 26: Upper annular surface
[0033] 28: Lower annular surface
[0034] 30: Cover
[0035] 32: Second ring wall
[0036] 321: Inner circumferential surface of the second ring wall
[0037] 322: Outer circumferential surface of the second ring wall
[0038] 34: Cover plate
[0039] 36: Spoon-shaped buckle protrusion set
[0040] A: Tank
[0041] A1: Tank
[0042] A2: Can lid
[0043] A3: Shoulders
[0044] H1: Length
[0045] H2: Length
[0046] H3: Length
[0047] H4: Length
[0048] H5: Length
[0049] HA: Length
[0050] HB: Length
[0051] M: Can lid sorting machine
[0052] M1: Feeding section
[0053] M2: Climbing Section
[0054] L: Central axis
[0055] S1: First Refrigeration Chamber
[0056] S2: Second Chamber Detailed Implementation
[0057] To more clearly illustrate this utility model, preferred embodiments are described in detail below with reference to the accompanying drawings. Please refer to... Figures 1 to 4 As shown, this is a preferred embodiment of the can lid 100 of the present invention. The can lid 100 is formed by injection molding of plastic using a mold, and the center of the can lid 100 has a central axis L extending in the vertical direction. The can lid 100 includes a ring wall 10, a shoulder ring 20, and a lid body 30, wherein:
[0058] The ring wall 10 is a circular ring concentric with the central axis L. The inner and outer sides of the ring wall 10 have an inner circumferential surface 12 and an outer circumferential surface 14, respectively. A protruding buckle 16 is formed at the lower edge of the inner circumferential surface 12.
[0059] The shoulder ring 20 is a circular ring concentric with the central axis L. The inner and outer sides of the shoulder ring each have an inner circumferential surface 22 and an outer circumferential surface 24, respectively. The upper and lower sides of the shoulder ring 20 each have an upper annular surface 26 and a lower annular surface 28, respectively. The outer edge of the lower annular surface 28 of the shoulder ring 20 is connected to the upper edge of the ring wall 10. The outer circumferential surface 24 of the shoulder ring and the outer circumferential surface 14 of the ring wall are aligned along the direction extending from the central axis L. Specifically, the outer circumferential surface 24 of the shoulder ring and the outer circumferential surface 14 of the ring wall together form a smooth and continuous cylindrical surface at their joint, with no radial drop.
[0060] The cover 30 includes a second annular wall 32 and a cover plate 34. The second annular wall 32 is a circular ring concentric with the central axis L, and its lower edge is connected to the inner edge of the upper annular surface 26 of the shoulder ring 20. The inner and outer sides of the second annular wall 32 respectively have an inner circumferential surface 321 and an outer circumferential surface 322, and the inner circumferential surface 321 of the second annular wall is aligned with the inner circumferential surface 22 of the shoulder ring along the direction extending from the central axis L. The cover plate 34 is a circular plate concentric with the central axis L, and its outer periphery is connected to the upper edge of the inner circumferential surface 321 of the second annular wall. Specifically, the top surface of the cover plate 34 is connected to the upper edge of the inner circumferential surface 321 of the second annular wall by its outer periphery.
[0061] The length H1 between the upper annular surface 26 and the lower annular surface 28 along the central axis L, i.e., the length H1 of the shoulder ring 20 along the central axis L, is greater than the length H2 of the cover plate 34 along the central axis L. In this preferred embodiment, the length H1 between the upper annular surface 26 and the lower annular surface 28 along the central axis L is greater than the length H2 of the cover plate 34 along the central axis L by more than 0.3 mm. In other preferred embodiments, the extent to which the length H1 of the shoulder ring 20 along the central axis L exceeds the length H2 of the cover plate 34 along the central axis L can be 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 4 mm, or 5 mm or more. Alternatively, the length H1 of the shoulder ring 20 along the central axis L can be set to more than twice the length H2 of the cover plate 34 along the central axis L. For the sake of aesthetic appearance and economical manufacturing costs, the length H1 between the upper annular surface 26 and the lower annular surface 28 along the central axis L can be set to be less than the length H3 of the annular wall 10 along the central axis L.
[0062] In this preferred embodiment, the length H4 between the outer peripheral surface 322 and the inner peripheral surface 321 of the second annular wall along the direction perpendicular to the central axis L is equal to the length H2 of the cover plate 34 along the direction perpendicular to the central axis L. The length H5 between the outer peripheral surface 14 and the inner peripheral surface 12 of the annular wall along the direction perpendicular to the central axis L is equal to the length H4 between the outer peripheral surface 322 and the inner peripheral surface 321 of the second annular wall along the direction perpendicular to the central axis L. The length HB between the upper annular surface 26 and the lower end of the annular wall 10 along the direction perpendicular to the central axis L is greater than half the length HA between the top surface of the cover plate 34 and the lower end of the annular wall 10 along the direction perpendicular to the central axis L. The space inside the lid 100, surrounded by the annular wall 10, forms a first chamber S1. The space inside the lid 100, surrounded by the shoulder ring 20 and the second annular wall 32, forms a second chamber S2. The volume of the second chamber S2 is smaller than that of the first chamber S1, and the second chamber S2 communicates with the first chamber S1. A spoon-locking protrusion assembly 36 is connected to the inner surface of the lid 30 adjacent to the second chamber S2 and to the inner circumferential surface 22 of the shoulder ring, protruding into the second chamber S2. The spoon-locking protrusion assembly 36 is used to fix a folding spoon inside the lid 100.
[0063] The can lid 100 of the preferred embodiment of the present invention improves the strength of the can lid 100 by increasing the thickness of the shoulder ring 20 by setting the length H1 of the shoulder ring 20 extending along the central axis L to be more than 0.3 mm greater than the length H2 of the cover plate 34 extending along the central axis L. This makes the can lid 100 less prone to bending or warping when subjected to external forces.
[0064] When this utility model is used, such as Figure 5 and Figure 5A As shown, the can lid 100 is installed on a can body A. Usually, multiple can bodies A with the can lid 100 are wrapped in shrink film. At this time, the multiple can bodies A are in a state of being adjacent to each other. During the transportation of the multiple can bodies A wrapped in shrink film, the two adjacent can bodies A may be slightly misaligned due to the movement of some of the can bodies A. This state will return to its original position after the multiple can bodies A are laid flat.
[0065] By thickening the shoulder ring 20, this invention ensures that when two adjacent can bodies A are misaligned, the upper edge of one can lid 100, i.e., the upper annular surface 26 of the shoulder ring 20, is positioned higher relative to the can body A where the shoulder ring 20 is located. This makes it less likely for the upper annular surface 26 to snap onto the lower edge of the annular wall 10 of the other can lid 100. Incidentally, the greater the length H1 of the shoulder ring 20 extending along the central axis L exceeds the length H2 of the cover plate 34 extending along the central axis L, the more effectively the upper annular surface 26 of one can lid 100 can be prevented from directly snapping onto the lower edge of the annular wall 10 of the other can lid 100. In this way, during the process of restoring two adjacent cans A to their original positions, the lid 100 of one can A can be prevented from lifting one side of the lid 100 of the other can A, so that during the movement of multiple cans A with shrink film packaging and each having the lid 100, the lid 100 of each can A is not easily detached from the can A.
[0066] This utility model incorporates a design that thickens the shoulder ring 20; please refer to [the relevant documentation]. Figure 3 As shown, the length HB between the upper annular surface 26 and the lower end of the annular wall 10 along the central axis L is also greater than half the length HA between the top surface of the cover plate 34 and the lower end of the annular wall 10 along the central axis L. Please refer to... Figure 6 As shown, when the two can lids 100 of this utility model are placed in opposite directions, the shoulder ring 20 of one can lid 100 will not fasten the shoulder ring 20 of the other can lid 100. This allows the can lid 100 of this utility model to be screened independently without affecting the surrounding can lids when used in an existing can lid screening machine, thereby improving the efficiency of screening can lids using the can lid screening machine.
[0067] The above description is only a preferred and feasible embodiment of this utility model. Any equivalent changes made by applying the specification and claims of this utility model should be included within the patent scope of this utility model.
Claims
1. A can lid, characterized in that, It has a central axis extending in the vertical direction, and includes a ring wall, a shoulder ring, and a cover, wherein: The ring wall is a circular ring concentric with the central axis, and the inner side of the ring wall has an inner circumferential surface, with a protruding buckle formed at the lower edge of the inner circumferential surface of the ring wall. The shoulder ring is a circular ring concentric with the central axis. The upper and lower sides of the shoulder ring have an upper annular surface and a lower annular surface, respectively, and the inner side of the shoulder ring has an inner circumferential surface. The outer edge of the lower annular surface is connected to the upper edge of the ring wall. The cover includes a second annular wall and a cover plate; the second annular wall is a ring concentric with the central axis, the lower edge of the second annular wall is connected to the inner edge of the upper annular surface, the inner side of the second annular wall has an inner circumferential surface, the inner circumferential surface of the second annular wall is aligned with the inner circumferential surface of the shoulder ring along the direction extending from the central axis; the outer circumferential edge of the cover plate is connected to the upper edge of the inner circumferential surface of the second annular wall; the length between the upper annular surface and the lower annular surface along the direction extending from the central axis is greater than the length of the cover plate along the direction extending from the central axis.
2. The can lid as described in claim 1, wherein, The outer side of the ring wall has an outer circumferential surface; the outer side of the shoulder ring has an outer circumferential surface; the outer circumferential surface of the shoulder ring is aligned with the outer circumferential surface of the ring wall in the direction extending along the central axis.
3. The can lid as described in claim 2, wherein, The length between the upper annular surface and the lower annular surface along the central axis is greater than the length of the cover plate along the central axis by more than 0.3 mm.
4. The can lid as described in claim 3, wherein, The length between the upper annular surface and the lower annular surface along the central axis is less than the length of the annular wall along the central axis.
5. The can lid as described in claim 4, wherein, The outer side of the second ring wall has a second ring wall outer peripheral surface; the length between the second ring wall outer peripheral surface and the second ring wall inner peripheral surface along the direction perpendicular to the central axis is equal to the length of the cover plate along the direction of the central axis.
6. The can lid as described in claim 5, wherein, The length between the outer circumferential surface of the ring wall and the inner circumferential surface of the ring wall along the direction perpendicular to the central axis is equal to the length between the outer circumferential surface of the second ring wall and the inner circumferential surface of the second ring wall along the direction perpendicular to the central axis.
7. The can lid as claimed in claim 1, wherein, The space inside the can lid surrounded by the ring wall forms a first chamber; the space inside the can lid surrounded by the shoulder ring and the second ring wall forms a second chamber; the volume of the second chamber is smaller than the volume of the first chamber, and the second chamber communicates with the first chamber.
8. The can lid as claimed in claim 7, wherein, A set of spoon-shaped buckle protrusions is connected to the inner circumferential surface of the shoulder ring on the inner surface of the cover and protrudes into the second container.
9. The can lid as claimed in claim 1, wherein, The length between the upper annular surface and the lower end of the annular wall along the central axis is greater than half the length between the top surface of the cover plate and the lower end of the annular wall along the central axis.