Curled edge structure with cup opening and water cup applying curled edge structure

Abstract

The utility model discloses a hemming structure with a cup opening and a water cup with the hemming structure. The hemming structure comprises a first straight section, a bent arc section, a second straight section and a bent arc sealing section. The first straight section extends in the vertical direction, the bottom end of the first straight section is connected with the top of the cup body, the top end of the first straight section is connected with one end of the bent arc section, the bent arc section turns outwards to form an arc, the other end of the bent arc section is connected with the top end of the second straight section, the second straight section extends in the vertical direction, and the bottom end of the second straight section is connected with one end of the bent arc sealing section. The arc sealing section is turned inwards to form an arc, and the other end of the arc sealing section is connected with the outer side wall of the first straight section. The curled edge structure comprising the first straight section, the bent arc section, the second straight section and the bent arc sealing section and the cup body are integrally formed, the problems of micro-crevice corrosion and potential safety hazards of a traditional C-shaped curled edge technology are solved, and the cup mouth of the cup is endowed with better sealing performance, structural strength and multi-scene adaptability.

Description

Technical Field

[0001] This utility model relates to the field of cup technology, and in particular to a rolled edge structure for the opening of a cup and a water cup using the same. Background Technology

[0002] Stainless steel water bottles are widely used in household drinking water, outdoor sports, and baby products due to their corrosion resistance and high strength. Currently, the mainstream manufacturing process often uses a C-shaped rolled edge technique to achieve edge sealing and improved tactile feel: this involves continuously rolling the thin-walled metal layer at the rim outwards to form a ring-shaped rolled edge structure. However, this process has revealed significant technical defects in long-term use.

[0003] Firstly, regarding structural safety, due to limitations in processing precision, the C-shaped rolled edge easily creates a micron-sized gap of 0.1-0.3mm between the rolled end and the outer wall of the cup. When household users frequently fill and rinse the cup, liquid residue can easily remain in this gap, creating a damp environment that leads to electrochemical corrosion of the metal substrate and the growth of microorganisms. In practical applications, when users (especially children) bite the cup rim, the edges of the gap can easily scratch the oral mucosa, posing a safety hazard. Therefore, developing a cup rim processing technology that combines seamless sealing with multi-scenario compatibility has become a critical technological bottleneck that the stainless steel water cup industry urgently needs to overcome. Utility Model Content

[0004] In response to the problems raised in the background art, the purpose of this utility model is to propose a rolled edge structure for the opening of a cup and a water cup using the same, which solves the problems of gaps in the existing rolled edge structure of cups and the low hygiene and safety standards.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A rolled edge structure for the opening of a cup, the rolled edge structure comprising a first straight section, a curved section, a second straight section, and a curved sealing section;

[0007] The first straight segment extends vertically, with its bottom end connected to the top of the cup body and its top end connected to one end of the curved segment. The curved segment curves outward, and its other end is connected to the top of the second straight segment. The second straight segment extends vertically, with its bottom end connected to one end of the curved sealing segment. The curved sealing segment curves inward, and its other end is connected to the outer wall of the first straight segment.

[0008] Preferably, the second straight segment is inclined from top to bottom toward the direction closer to the first straight segment.

[0009] Preferably, the angle between the tangent of the bottom end face of the curved sealing section and the outer wall of the first straight section is α, wherein 4°≤α≤90°.

[0010] Preferably, the furthest distance between the first straight segment and the second straight segment is the width D of the rolled edge structure, and the material thickness of the cup body is d, wherein 2d≤D≤5d.

[0011] Preferably, the distance from the top of the curved section to the bottom of the curved sealing section is the height H of the rolled edge structure, and the overall height of the cup body is h, where H:h = 1:(2~20).

[0012] Preferably, the curved segment is a semi-circular arc.

[0013] A water cup includes a cup body, the top of which has an opening, the opening having the aforementioned rolled edge structure, the rolled edge structure being integrated with the cup body structure.

[0014] Preferably, the device also includes a handle, which comprises a horizontal section and a vertical section, one end of the horizontal section being connected to one end of the vertical section, the handle being in the shape of a "7", and the other end of the horizontal section being welded to the second vertical section.

[0015] Preferably, the cup also includes a lid, which is detachably connected to the cup body and covers the opening and the horizontal section.

[0016] Preferably, the rolled edge structure and the cup body are made of titanium.

[0017] Compared with the prior art, one of the above technical solutions has the following beneficial effects:

[0018] By integrating the rolled edge structure, which includes a first straight section, a curved section, a second straight section, and a curved sealing section, with the cup body, the problem of micro-gap corrosion and safety hazards of traditional C-shaped rolled edge technology is solved, and the cup mouth is given better sealing performance, structural strength, and adaptability to multiple scenarios. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the rolled edge structure of one embodiment of the present invention;

[0020] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0021] Figure 3 yes Figure 1 Enlarged view of point A in the middle;

[0022] Figure 4 This is a schematic diagram of another embodiment of the present invention;

[0023] Figure 5 This is a schematic diagram of another embodiment of the present invention.

[0024] The components include: rolled edge structure 100, cup body 200, handle 300, horizontal section 310, vertical section 320, cup lid 400, first straight section 1, curved section 2, second straight section 3, and curved sealing section 4. Detailed Implementation

[0025] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0026] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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 utility model.

[0027] Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," and "third" may explicitly or implicitly include one or more of that feature.

[0028] 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 fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] The following is in conjunction with the appendix Figures 1 to 5 The technical solution of this utility model will be further illustrated through specific implementation methods.

[0030] A rolled edge structure for the opening of a cup, the rolled edge structure comprising a first straight segment 1, a curved segment 2, a second straight segment 3, and a curved sealing segment 4;

[0031] The first straight segment 1 extends vertically, with its bottom end connected to the top of the cup body 200 and its top end connected to one end of the curved segment 2. The curved segment 2 turns outward, and its other end is connected to the top of the second straight segment 3. The second straight segment 3 extends vertically, with its bottom end connected to one end of the curved sealing segment 4. The curved sealing segment 4 turns inward, and its other end is connected to the outer wall of the first straight segment 1.

[0032] The first straight section 1 provides connection to the cup body 200 and vertical support. The curved section 2 forms a smooth outward flip transition of 120°-180°. The second straight section 3 extends in the vertical direction and connects at the bottom with the inward-flipping (equivalent to the direction of the first straight section 1) curved sealing section 4. The curved sealing section 4 is closed with the outer wall of the first straight section 1, forming a completely closed annular rolled edge structure 100. Compared with the 0.1-0.3mm gap of the traditional C-shaped rolled edge, the rolled edge structure 100 of this solution eliminates the open end gap of the traditional C-shaped rolled edge. The closed rolled edge has no gaps that can trap water, avoiding electrochemical corrosion (such as intergranular corrosion of stainless steel) and microbial growth (such as mold and E. coli). It also avoids the risk of the mouth being scratched by the gaps.

[0033] To further explain, the first straight segment 1 and the second straight segment 3 form a vertical support frame, the curved segment 2 forms a prestressed buffer layer, and the curved sealing segment 4 provides lateral restraint, resulting in an overall improved compressive strength compared to traditional C-shaped rolled edges. In a 1.5m drop test, the deformation of this structure is significantly reduced compared to traditional C-shaped rolled edges, and the permanent deformation threshold of the cup rim is increased, making cups using this rolled edge structure particularly suitable for high-intensity use scenarios such as outdoor sports.

[0034] To further explain, although the outer wall of the curved sealing section 4 and the first straight section 1 is connected by welding, it can be integrated into existing stamping production lines through process optimization. Preferably, the outer wall of the curved sealing section 4 and the first straight section 1 is connected by laser welding. Laser welding has high energy density, low heat input, and a narrow heat-affected zone, which can further avoid the grain boundary chromium depletion phenomenon caused by high temperature in traditional welding, thereby reducing the risk of intergranular corrosion. In addition, the joint between the curved sealing section 4 and the first straight section 1 achieves a surface roughness of Ra≤0.8μm through laser cladding polishing, avoiding scratches to the oral mucosa caused by traditional rolled edge burrs. The closed part of this rolled edge structure has no sharp angles or open gaps, so there is no risk of cuts when children bite it, which meets the EN14350-2020 child product safety standard.

[0035] This utility model solves the problems of micro-gap corrosion and safety hazards of traditional C-shaped edge rolling process by integrally molding the rolled edge structure 100, which includes a first straight section 1, a curved section 2, a second straight section 3 and a curved sealing section 4, with the cup body 200. It also gives the cup mouth better sealing performance, structural strength and adaptability to multiple scenarios.

[0036] Furthermore, the second straight segment 3 is inclined from top to bottom toward the direction of the first straight segment 1.

[0037] The inclined design of the second straight section 3 forms a spatial truss structure, which upgrades the traditional vertical plane force mode to a spatial vector dispersion system. This structure can convert impact energy into axial component force through the inclined section, reduce the maximum deformation of the cup mouth, and improve impact resistance, making it particularly suitable for outdoor sports scenarios.

[0038] Furthermore, the angle between the tangent of the bottom end face of the curved sealing section 4 and the outer side wall of the first straight section 1 is α, where 4°≤α≤90°.

[0039] By limiting the angle α to 4°-90°, a dynamic balance between sealing performance, mechanical strength, and process cost is achieved, with particularly better results for welding filling. Preferably, the angle α between the tangent of the bottom end face of the curved sealing section 4 and the outer wall of the first straight section 1 is 81°.

[0040] Furthermore, the furthest distance between the first straight segment 1 and the second straight segment 3 is the width D of the rolled edge structure 100, and the material thickness of the cup body is d, where 2d≤D≤5d.

[0041] By defining the ratio between the width D of the rolled edge structure 100 and the thickness d of the cup body material, significant optimizations were achieved in three aspects: structural strength, sealing reliability, and process feasibility. Specifically, in terms of mechanical properties, when D = 2d, the rolled edge structure forms a compact "double-wall" support (the first straight segment 1 and the second straight segment 3 are tightly fitted), significantly improving resistance to radial compression; when D = 5d, the internal space of the rolled edge increases, allowing the material to undergo elastic deformation under stress, absorbing impact energy and avoiding brittle fracture. In terms of sealing performance and hygiene standards, when D < 2d, an excessively narrow rolled edge can easily lead to insufficient compression between the curved sealing segment 4 and the first straight segment 1; while D ≥ 2d ensures that the curved sealing segment 4 has sufficient contact area (through the synergistic effect of the included angle α), achieving zero-permeability sealing; an excessively wide rolled edge (D > 5d) can easily lead to increased brittleness at the cup mouth.

[0042] Furthermore, the distance from the top of the curved segment to the bottom of the curved sealing segment is the height H of the rolled edge structure, and the overall height of the cup body is h, where H:h = 1:(2~20).

[0043] By limiting the ratio of the height H of the rolled edge structure 100 to the overall height h of the cup body, refined optimizations have been achieved in terms of user experience and structural strength. Specifically, when H is in the low height range of 3mm-5mm, the shallow rolled edge conforms to the thickness and curvature of human lips, eliminating the feeling of pressure from the edge when drinking from the cup; at the same time, the shallow rolled edge reduces the amount of material used, and the weight of the cup rim is also reduced accordingly.

[0044] Furthermore, the curved segment 2 is a semi-circular arc.

[0045] By limiting the curved segment 2 to a semi-circular arc, there is no abrupt change in curvature at the tangent point where it connects with the first straight segment 1 and the second straight segment 3, thus reducing the risk of microcracks.

[0046] A water cup includes a cup body 200, the top of which is open, and the open has the aforementioned rolled edge structure 100, which is integrally formed with the cup body 200.

[0047] This embodiment relates to a water cup, such as... Figure 4 As shown, the water cup has a cup body 200, and a rolled edge structure 100 is provided at the top opening of the cup body 200. The rolled edge structure 100 is structurally integrated with the cup body 200, meaning that the rolled edge structure at the opening of the cup body is not an independent component, but a continuous extension structure formed by folding and pressing the cup body material itself, forming a seamless single whole with the cup body 200. Water cups using the above-mentioned rolled edge structure 100 have better sealing performance, structural strength, and adaptability to multiple scenarios.

[0048] Furthermore, it also includes a handle 300, which includes a horizontal section 310 and a vertical section 320. One end of the horizontal section 310 is connected to one end of the vertical section 320. The handle 300 is in the shape of a "7". The other end of the horizontal section 310 is welded to the second vertical section 3.

[0049] By integrating a "7"-shaped handle 300 into the rolled edge structure 100, the vertical section 320 provides a vertical gripping fulcrum, and the horizontal section 310 is welded to the second straight section 3 of the rolled edge structure 100 to form a triangular force transmission path, which evenly distributes the gripping torque to the cup body.

[0050] Furthermore, it also includes a cup lid 400, which is detachably connected to the cup body and covers the opening and the horizontal section 310.

[0051] By integrating a detachable lid 400 that covers the opening of the cup and the horizontal section 310 of the handle, a breakthrough improvement in the overall system's sealing, portability, safety, and multi-functional expansion is achieved. The lid 400 covering the horizontal section 310 of the handle prevents mud / rainwater from entering the handle's welded seams during outdoor use. At the same time, the full-coverage design effectively prevents insects from entering the cup opening or the handle connection.

[0052] Furthermore, both the rolled edge structure and the cup body are made of titanium. Titanium is a high-strength, lightweight metal with good antibacterial properties.

[0053] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without any inventive effort, and these embodiments will all fall within the scope of protection of this utility model.

Claims

1. A rolled edge structure for the opening of a cup, characterized in that: The rolled edge structure includes a first straight section, a curved section, a second straight section, and a curved sealing section; The first straight segment extends vertically, with its bottom end connected to the top of the cup body and its top end connected to one end of the curved segment. The curved segment curves outward, and its other end is connected to the top end of the second straight segment. The second straight segment extends vertically, with its bottom end connected to one end of the curved sealing segment. The curved sealing segment curves inward, and its other end is connected to the outer wall of the first straight segment.

2. The rolled edge structure of the cup opening according to claim 1, characterized in that: The second straight segment slopes downwards towards the direction closer to the first straight segment.

3. The rolled edge structure of the cup opening according to claim 2, characterized in that: The angle between the tangent of the bottom end face of the curved sealing section and the outer wall of the first straight section is α, where 4°≤α≤90°.

4. The rolled edge structure of the cup opening according to claim 3, characterized in that: The furthest distance between the first straight segment and the second straight segment is the width D of the rolled edge structure, and the material thickness of the cup body is d, where 2d≤D≤5d.

5. The rolled edge structure of the cup opening according to claim 3, characterized in that: The distance from the top of the curved section to the bottom of the curved sealing section is the height H of the rolled edge structure, and the overall height of the cup body is h, where H:h = 1:(2~20).

6. The rolled edge structure of the cup opening according to claim 1, characterized in that: The curved segment is a semi-circular arc.

7. A water cup, comprising a cup body, characterized in that, The top of the cup body is provided with an opening, and the opening has a rolled edge structure as described in any one of claims 1-6, wherein the rolled edge structure is integrated with the cup body structure.

8. A water cup according to claim 7, characterized in that: It also includes a handle, which comprises a horizontal section and a vertical section. One end of the horizontal section is connected to one end of the vertical section. The handle is in the shape of a "7". The other end of the horizontal section is welded to the second vertical section.

9. A water cup according to claim 8, characterized in that: It also includes a cup lid, which is detachably connected to the cup body and covers the opening and the horizontal section.

10. A water cup according to claim 9, characterized in that: The rolled edge structure and the cup body are made of titanium.

Images