A safe and stable pressure-resistant full-opening easy-open cover

Abstract

The utility model discloses a kind of safe and stable pressure-resistant full-opening easy-open cover, including cover and pull ring, annular score line is equipped on cover, annular score line is set on cover along cover surface edge and constitutes a pull cover, riveting end of pull ring is riveted with the edge of pull cover by rivet, and the opening end of pull ring is opposite to annular score line, characterized by: two shallow score positions are equipped on annular score line, two shallow score positions are symmetrically set on the opening end of pull ring two sides, other positions of annular score line are all deep score positions, the depth of shallow score position accounts for one third of the thickness of cover, the depth of deep score position accounts for one half of the thickness of cover.This pressure-resistant full-opening easy-open cover is convenient to open, can effectively block pull cover instantaneous drop, safe and stable.

Description

Technical Field

[0001] This utility model relates to an easy-open lid, and more particularly to a safe, stable, pressure-resistant, fully openable easy-open lid. Background Technology

[0002] Currently, easy-open lids used for canned goods generally consist of a lid body and a pull ring. The lid body has an annular groove running along the edge of the lid surface, forming a pull-open mechanism. The pull ring's riveted end is attached to the edge of the lid with rivets, and the opening end of the pull ring is directly opposite the annular groove. This type of lid body is made of DR-8 material. DR-8 material is characterized by high hardness and low elongation. With advancements in metal easy-open lid technology, DR-8 material is increasingly used in metal easy-open lids, resulting in lighter, more pressure-resistant, and easier-to-open lids.

[0003] However, the low elongation of the DR-8 material, resulting in low full-opening force, also creates new problems. When sealing the can, to ensure product quality, the air inside is usually evacuated before sealing, creating a negative pressure environment inside. At this point, when the pull tab is opened, the pressure difference causes the pull tab to tear rapidly, resulting in it detaching instantly. This not only significantly impacts the user experience but also poses a safety hazard, potentially causing scratches to the user due to the pull tab detaching. Utility Model Content

[0004] The problem to be solved by this utility model is to provide a safe and stable pressure-resistant fully openable easy-open cover. This pressure-resistant fully openable easy-open cover is easy to open and can effectively prevent the cover from falling off instantly, making it safe and stable.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] A safe and stable pressure-resistant, fully openable easy-open lid includes a lid body and a pull ring. The lid body has an annular etched line, which runs along the edge of the lid surface and forms a pull ring. The riveted end of the pull ring is riveted to the edge of the pull ring by a rivet, and the opening end of the pull ring is directly opposite the annular etched line. The lid body is characterized by having two shallow etched areas on the annular etched line, which are symmetrically arranged on both sides of the opening end of the pull ring. The other positions on the annular etched line are deep etched areas. The depth of the shallow etched areas is one-third of the thickness of the lid body, and the depth of the deep etched areas is one-half of the thickness of the lid body.

[0007] Because the depth of the two shallow slits is only one-third of the cap's thickness, while the depth of the other positions on the annular slits (deep slits) is half the cap's thickness, it can be seen that the depth of the two shallow slits is even smaller, thus increasing the full-opening force required for them. When the pull ring is opened, after the pull ring pushes open the notch created by the cap and reaches the two shallow slits, the negative pressure inside the can is insufficient to break the slits. Simultaneously, the negative pressure inside the can and the ambient pressure remain in balance, with the negative pressure decreasing. As the pull ring is further lifted, it breaks through the slits of the two shallow slits, allowing the cap to be pulled out. The positions of the slits on the two shallow slits are carefully designed so that when the pull ring is opened to its highest position, it precisely breaks through the slits at that position. In this way, the full-opening force required to subsequently pull up the cap remains relatively low, ensuring a smooth and easy opening process for the easy-open cap. Furthermore, during the opening process, the shallow grooves effectively prevent the lid from falling off instantly, avoiding the lid from suddenly flying out due to internal negative pressure impact, reducing the risk of users being scratched, and demonstrating the safety of the easy-open lid during use.

[0008] In a preferred embodiment, the cover body is provided with two upward-protruding outer ring reinforcing ribs. These two ribs are located between the two shallow notches and below the riveting end of the pull ring. The two ribs are symmetrically arranged about the line connecting the opening end of the pull ring and the rivet. The outer ring reinforcing ribs positioned between the two shallow notches enhance the strength of the cover in this area. When the pull ring is opened to its highest position, it effectively prevents the cover from failing to open the notch between the two shallow notches due to insufficient strength, further ensuring the stability of the easy-open cover opening process.

[0009] In a further preferred embodiment, the upper surface of the outer ring boss reinforcing rib is a plane, and the upper surface of the outer ring boss reinforcing rib is in contact with the lower surface of the riveting end of the pull ring. When the pull ring is subjected to force, the planar contact allows the pull ring to evenly transmit the force to the outer ring boss reinforcing rib, avoiding excessive local force on the riveting end of the pull ring that could lead to deformation or damage, and enhancing the stability of the connection between the pull ring and the cover.

[0010] In a further preferred embodiment, the outer ring boss reinforcing rib is a boss that is smaller at the top and larger at the bottom. The cross-sectional area of ​​the outer ring boss reinforcing rib gradually increases from top to bottom. When the lid is subjected to the force from the pull ring opening and the internal pressure of the tank, the boss structure with a smaller top and larger bottom can transmit the force downward along the direction of the gradually increasing cross-sectional area, effectively avoiding stress concentration.

[0011] In a preferred embodiment, the cover is provided with a first annular reinforcing rib, a second annular reinforcing rib, and a third annular reinforcing rib in sequence from the outside to the inside. The first annular reinforcing rib protrudes downward toward the center of the cover, the second annular reinforcing rib protrudes downward toward the center of the cover and is located within the first annular reinforcing rib, and the third annular reinforcing rib protrudes downward toward the center of the cover and is located within the second annular reinforcing rib. The first annular reinforcing rib forms a first annular inclined surface that gradually slopes downward from the outside to the inside on the cover, the second annular reinforcing rib forms a second annular inclined surface that gradually slopes downward from the outside to the inside on the cover, and the third annular reinforcing rib forms a third annular inclined surface that gradually slopes downward from the outside to the inside on the cover. The second annular inclined surface is located below and inside the first annular inclined surface, and the third annular inclined surface is located below and inside the second annular inclined surface. The aforementioned cover is provided with a first annular reinforcing rib, a second annular reinforcing rib, and a third annular reinforcing rib in sequence from its edge to its center. The height of the first annular inclined surface, the second annular inclined surface, and the third annular inclined surface decreases from the outside to the inside. When the center of the cover is subjected to internal pressure, the three annular reinforcing ribs play a supporting and strengthening role in sequence, strengthening the force on the center of the cover and improving the pressure resistance of the cover.

[0012] In a further preferred embodiment, a first annular plane is provided between the edge of the cover and the first annular inclined surface; a second annular plane is provided between the first and second annular inclined surfaces; a third annular plane is provided between the second and third annular inclined surfaces; and the inner region of the third annular inclined surface is a fourth plane. The first annular plane is higher than the second annular plane, the second annular plane is higher than the third annular plane, and the third annular plane is higher than the fourth plane. This arrangement causes the heights of the first, second, third, and fourth annular planes to gradually decrease inwards. This progressively decreasing height design allows pressure to be gradually distributed from the outside in, reducing the concentrated pressure on the middle part of the cover and effectively preventing excessive deformation of the cover's center.

[0013] In a further preferred embodiment, the fourth plane is provided with two central boss reinforcing ribs, which are located on both sides of the pull end of the pull ring. These central boss reinforcing ribs enhance the strength of the fourth plane, thereby improving the pressure resistance of the easy-open cover.

[0014] In a further preferred embodiment, the central boss reinforcing rib is a boss that is smaller at the top and larger at the bottom. The cross-sectional area of ​​the central boss reinforcing rib gradually increases from top to bottom.

[0015] In a further preferred embodiment, the riveted end of the pull ring is positioned above the first annular plane. Two corrugated reinforcing ribs are provided on the first annular plane, symmetrically arranged about the line connecting the opening end of the pull ring and the rivet. The inner end of each corrugated reinforcing rib is close to the edge of the riveted end of the pull ring, and the outer end extends from the inside to the outside along the curvature of the annular groove to connect with the first annular reinforcing rib. These corrugated reinforcing ribs enhance the strength of the first annular plane, thereby improving the pressure resistance of the easy-open cover.

[0016] Compared with the prior art, this utility model has the following advantages:

[0017] This invention keeps the full opening force required to pull up the cover at a low level, ensuring that the easy-open cover opens easily and smoothly. It also effectively prevents the cover from falling off suddenly, avoiding the cover from flying out suddenly due to internal negative pressure impact, reducing the risk of users being scratched, and improving the safety of the easy-open cover during use. Attached Figure Description

[0018] Figure 1 This is a structural schematic diagram of a specific embodiment of the present utility model;

[0019] Figure 2 yes Figure 1 Cross-sectional view of CC in the middle;

[0020] Figure 3 yes Figure 1 Enlarged diagrams of A and B in the diagram;

[0021] Figure 4 yes Figure 3 Cross-sectional view of DD in the middle;

[0022] Figure 5 yes Figure 3 Cross-sectional view of EE. Detailed Implementation

[0023] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0024] like Figure 1-5As shown, the safe and stable pressure-resistant fully openable easy-open cover in this embodiment includes a cover body 1 and a pull ring 2. The cover body 1 is provided with an annular etched line 11. The annular etched line 11 is set along the edge of the cover surface on the cover body 1 and forms a pull cover 3. The riveting end 21 of the pull ring 2 is riveted to the edge of the pull cover 3 by a rivet 4, and the opening end 22 of the pull ring 2 is directly opposite to the annular etched line 11. The annular etched line 11 is provided with two shallow etched positions 111. The two shallow etched positions 111 are symmetrically arranged on both sides of the opening end 22 of the pull ring 2. The other positions of the annular etched line 11 are deep etched positions 112. The depth of the shallow etched positions 111 is one-third of the thickness of the cover body 1, and the depth of the deep etched positions 112 is one-half of the thickness of the cover body 1.

[0025] Since the depth of the two shallow slits 111 is only one-third of the thickness of the cover 1, and the depth of other positions of the annular slit line 11 (deep slit 112) is half the thickness of the cover 1, it can be seen that the depth of the two shallow slits 111 is smaller, thus increasing the full opening force of the two shallow slits 111. When the pull ring 2 is opened, after the pull ring 2 pushes open the notch created by the pull cover 3 and reaches the two shallow slits 111, the negative pressure inside the can cannot break the slit lines of the two shallow slits 111. At the same time, the negative pressure inside the can and the ambient pressure continue to balance, and the negative pressure becomes smaller and smaller. As the pull ring 2 is further lifted, after the pull ring 2 breaks through the slit lines of the two shallow slits 111, the pull ring 2 can be pulled to pull out the pull cover 3. The position of the slit lines of the two shallow slits 111 is carefully designed so that when the pull ring 2 is opened to the highest position, it can just break through the slit line at that position. In this way, the full opening force required to pull up the cover 3 remains at a relatively low level, ensuring that the easy-open cover opens smoothly and easily. Furthermore, during the opening process, the shallow grooves 111 effectively prevent the cover 3 from falling off instantly, avoiding the cover 3 from suddenly flying out due to internal negative pressure impact, reducing the risk of the user being scratched, and demonstrating the safety of the easy-open cover during use.

[0026] The cover 1 has two upward-protruding outer ring reinforcing ribs 12, which are located between the two shallow notches 111 and below the riveting end 21 of the pull ring 2. The two outer ring reinforcing ribs 12 are symmetrically arranged about the line connecting the opening end 22 of the pull ring 2 and the rivet 4. The outer ring reinforcing ribs 12 located between the two shallow notches 111 strengthen the cover 3 in this area. When the pull ring 2 is opened to its highest position, it effectively prevents the cover 3 from failing to open the notch between the two shallow notches 111 due to insufficient strength, further ensuring the stability of the easy-open cover opening process.

[0027] The upper surface of the outer ring boss reinforcing rib 12 is flat, and the upper surface of the outer ring boss reinforcing rib 12 is in contact with the lower surface of the riveting end 21 of the pull ring 2. When the pull ring 2 is subjected to force, the flat contact allows the pull ring 2 to evenly transmit the force to the outer ring boss reinforcing rib 12, avoiding excessive local force on the riveting end 21 of the pull ring 2, which could lead to deformation or damage, and enhancing the stability of the connection between the pull ring 2 and the cover 1.

[0028] The outer ring boss reinforcing rib 12 is a boss that is smaller at the top and larger at the bottom. The cross-sectional area of ​​the outer ring boss reinforcing rib 12 gradually increases from top to bottom. When the pull cover 3 is subjected to the force from the opening of the pull ring 2 and the internal pressure of the tank, the boss structure with a smaller top and larger bottom can transmit the force downward along the direction of the gradually increasing cross-sectional area, effectively avoiding stress concentration.

[0029] The cover 1 is provided with a first annular reinforcing rib 13, a second annular reinforcing rib 14, and a third annular reinforcing rib 15 in sequence from the outside to the inside. The first annular reinforcing rib 13 protrudes downward toward the center of the cover 1, the second annular reinforcing rib 14 protrudes downward toward the center of the cover 1 and is located within the first annular reinforcing rib 13, and the third annular reinforcing rib 15 protrudes downward toward the center of the cover 1 and is located within the second annular reinforcing rib 14. The first annular reinforcing rib 13 forms a first annular inclined surface 131 that gradually slopes downward from the outside to the inside on the cover 1, the second annular reinforcing rib 14 forms a second annular inclined surface 141 that gradually slopes downward from the outside to the inside on the cover 1, and the third annular reinforcing rib 15 forms a third annular inclined surface 151 that gradually slopes downward from the outside to the inside on the cover 1. The second annular inclined surface 141 is located below and inside the first annular inclined surface 131, and the third annular inclined surface 151 is located below and inside the second annular inclined surface 141. The cover 1 is provided with a first annular reinforcing rib 13, a second annular reinforcing rib 14, and a third annular reinforcing rib 15 in sequence from its edge to its center. The height of the first annular inclined surface 131, the second annular inclined surface 141, and the third annular inclined surface 151 decreases from the outside to the inside. When the center of the cover 1 is subjected to internal pressure, the three annular reinforcing ribs play a supporting and strengthening role in sequence, strengthening the force on the center of the cover 1 and improving the pressure resistance of the cover 1.

[0030] A first annular plane 132 is provided between the edge of the cover 1 and the first annular inclined surface 131. A second annular plane 142 is provided between the first annular inclined surface 131 and the second annular inclined surface 141. A third annular plane 152 is provided between the second annular inclined surface 141 and the third annular inclined surface 151. The inner region of the third annular inclined surface 151 is a fourth plane 153. The first annular plane 132 is higher than the second annular plane 142, the second annular plane 142 is higher than the third annular plane 152, and the third annular plane 152 is higher than the fourth plane 153. Through this arrangement, the heights of the first annular plane 132, the second annular plane 142, the third annular plane 152, and the fourth plane 153 gradually decrease inward. This progressively decreasing height design allows the pressure to be gradually distributed from the outside to the inside, reducing the concentrated pressure on the middle part of the cover 1 and effectively preventing excessive deformation of the center of the cover 1.

[0031] The fourth plane 153 is provided with two central boss reinforcing ribs 16, which are located on both sides of the lifting end 23 of the pull ring 2. The aforementioned central boss reinforcing ribs 16 can improve the strength of the fourth plane 153, thereby improving the pressure resistance of the easy-open cover.

[0032] The central boss reinforcing rib 16 is a boss that is smaller at the top and larger at the bottom. The cross-sectional area of ​​the central boss reinforcing rib 16 gradually increases from top to bottom.

[0033] The riveted end 21 of the pull ring 2 is located above the first annular plane 132. Two corrugated reinforcing ribs 17 are provided on the first annular plane 132. These two corrugated reinforcing ribs 17 are symmetrically arranged about the line connecting the opening end 22 of the pull ring 2 and the rivet 4. The inner end of each corrugated reinforcing rib 17 is close to the edge of the riveted end 21 of the pull ring 2, and the outer end of each corrugated reinforcing rib 17 extends from the inside to the outside along the bending direction of the annular notch line 11 to connect with the first annular reinforcing rib 13. These corrugated reinforcing ribs 17 can improve the strength of the first annular plane 132, thereby improving the pressure resistance of the easy-open cover.

[0034] Furthermore, it should be noted that the names of the various parts of the specific embodiments described in this specification may differ. All equivalent or simple variations made to the structure, features, and principles described in this utility model patent concept are included within the protection scope of this utility model patent. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, as long as they do not deviate from the structure of this utility model or exceed the scope defined in these claims, they should all fall within the protection scope of this utility model.

Claims

1. A safe and stable pressure-resistant, fully openable easy-open lid, comprising a lid body and a pull ring, wherein the lid body is provided with an annular scoring line, the annular scoring line being set along the edge of the lid surface and forming a pull ring, the riveted end of the pull ring being riveted to the edge of the pull ring by a rivet, and the opening end of the pull ring being directly opposite the annular scoring line, characterized in that: The annular groove line has two shallow grooves, which are symmetrically arranged on both sides of the opening end of the pull ring. The other positions on the annular groove line are deep grooves. The depth of the shallow grooves is one-third of the thickness of the cover, and the depth of the deep grooves is one-half of the thickness of the cover.

2. The safe and stable pressure-resistant fully openable easy-open cap as described in claim 1, characterized in that: The cover is provided with two upward-protruding outer ring bosses and reinforcing ribs. The two outer ring bosses and reinforcing ribs are located between the two shallow grooves and below the riveting end of the pull ring. The two outer ring bosses and reinforcing ribs are symmetrically arranged with the line connecting the opening end of the pull ring and the rivet as the axis of symmetry.

3. The safe and stable pressure-resistant fully openable easy-open cap as described in claim 2, characterized in that: The upper surface of the outer ring boss reinforcing rib is flat, and the upper surface of the outer ring boss reinforcing rib is in contact with the lower surface of the riveting end of the pull ring.

4. The safe and stable pressure-resistant fully openable easy-open cap as described in claim 2, characterized in that: The outer ring boss reinforcing rib is a boss that is smaller at the top and larger at the bottom.

5. The safe and stable pressure-resistant fully openable easy-open cap as described in claim 1, characterized in that: The cover is provided with a first annular reinforcing rib, a second annular reinforcing rib, and a third annular reinforcing rib from the outside to the inside. The first annular reinforcing rib protrudes downward toward the center of the cover, the second annular reinforcing rib protrudes downward toward the center of the cover and is located within the first annular reinforcing rib, and the third annular reinforcing rib protrudes downward toward the center of the cover and is located within the second annular reinforcing rib. The first annular reinforcing rib forms a first annular inclined surface that gradually slopes downward from the outside to the inside on the cover body; the second annular reinforcing rib forms a second annular inclined surface that gradually slopes downward from the outside to the inside on the cover body; and the third annular reinforcing rib forms a third annular inclined surface that gradually slopes downward from the outside to the inside on the cover body; the second annular inclined surface is located inside and below the first annular inclined surface, and the third annular inclined surface is located inside and below the second annular inclined surface.

6. The safe and stable pressure-resistant fully openable easy-open cap as described in claim 5, characterized in that: A first annular plane is provided between the cover edge and the first annular inclined surface, a second annular plane is provided between the first annular inclined surface and the second annular inclined surface, a third annular plane is provided between the second annular inclined surface and the third annular inclined surface, and the inner region of the third annular inclined surface is a fourth plane. The first annular plane is higher than the second annular plane, the second annular plane is higher than the third annular plane, and the third annular plane is higher than the fourth plane.

7. The safe and stable pressure-resistant fully openable easy-open cap as described in claim 6, characterized in that: The fourth plane is provided with two central boss reinforcing ribs, which are located on both sides of the lifting end of the pull ring.

8. The safe and stable pressure-resistant fully openable easy-open cap as described in claim 7, characterized in that: The central boss reinforcing rib is a boss that is smaller at the top and larger at the bottom.

9. The safe and stable pressure-resistant fully openable easy-open cap as described in claim 6, characterized in that: The riveted end of the pull ring is located above the first annular plane. Two corrugated reinforcing ribs are provided on the first annular plane. The two corrugated reinforcing ribs are symmetrically arranged with the line connecting the opening end of the pull ring and the rivet as the axis of symmetry. The inner end of the corrugated reinforcing rib is close to the edge of the riveted end of the pull ring, and the outer end of the corrugated reinforcing rib extends from the inside to the outside along the bending direction of the annular groove line to connect with the first annular reinforcing rib.

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