Resealable design cover with vacuum and pressure release button
Patent Information
- Application Number
- CN202522606458.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-09
- Publication Date
- 2026-10-27
- Estimated Expiration
- 2035-12-09
AI Technical Summary
然而，上述现有压盖式密封结构在实际使用中仍存在一定不足：由于依赖盖体螺纹与瓶口螺纹的过盈配合及密封胶的压紧作用，首次开启时往往需要施加较大的扭矩，导致开启力过大、操作费力，尤其对力气较小的用户或特定使用场景造成不便
其一，本实用新型通过在瓶盖的顶壁设置环形凹槽及位于第一半区的第一预裁切线，构成了一个明确的力学薄弱区。用户只需对按压部施加向下的压力，即可使按压部沿第一预裁切线精准、省力地与顶壁分离，形成缝隙，从而破坏瓶内真空状态，或者释压，从而避免了传统压盖式瓶盖所需的巨大旋转扭矩的缺陷，显著降低了开启力，极大提升了开盖便利性与用户体验。
Smart Images
Figure CN224899569U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of bottle caps, specifically a resealable cap with vacuum and pressure release buttons. Background Technology
[0002] As a common container for holding goods, a bottle typically consists of two parts: the bottle body and the cap. A reliable connection structure is needed between the bottle body and the cap to achieve a seal, while also allowing for opening depending on the intended use.
[0003] Currently, common bottle cap connection methods include rotary connections (such as threaded connections) and compression cap connections. Among them, compression cap connections are widely used in the glass bottle / canned food industry. This type of structure generally uses bottle caps made of tin-plated thin steel sheet (commonly known as tinplate), with pre-drilled threads and sealant applied to the inside of the cap. During the capping process, mechanical pressure causes the cap threads to interlock with the bottle mouth threads, while the sealant is compressed and deformed, thus forming a vacuum seal. However, the above-mentioned existing compression cap sealing structure still has certain shortcomings in practical use: due to the reliance on the interference fit between the cap threads and the bottle mouth threads and the compression effect of the sealant, a large torque is often required when opening for the first time, resulting in excessive opening force and difficult operation, especially causing inconvenience for users with less strength or in certain usage scenarios. Summary of the Invention
[0004] The purpose of this invention is to provide a resealable cover with vacuum and pressure relief buttons, which aims to overcome the aforementioned problems in the prior art.
[0005] To achieve this objective, the present invention provides the following technical solution: A resealable cap with vacuum and pressure relief buttons, made of sheet metal, includes a top wall, side walls extending downward from the periphery of the top wall, and a connection structure formed on the side walls for sealing connection with the bottle body. The top wall is divided into a first half-section and a second half-section by a reference line passing through its center. The top wall has an annular groove, and a pressing part for downward movement under pressure is formed inside the annular groove. The inner wall or bottom surface of the annular groove has a first pre-cut line located in the first half-section around the pressing part. The first pre-cut line is used to separate the pressing part from the rest of the top wall when subjected to downward pressure, thereby forming a gap connecting the inside and outside of the cap.
[0006] In one embodiment, the first pre-cut line is arc-shaped.
[0007] In another embodiment, the first pre-cut line is bent in a V-shape towards the pressing part at its axisymmetric location.
[0008] Furthermore, in the first half-region, the aforementioned annular groove is provided with a second pre-cut line outside the first pre-cut line. The second pre-cut line is used to limit the deformation range of the top wall caused by the pressing part when it is pressed down.
[0009] Furthermore, the aforementioned annular groove is provided with a third pre-cut line outside the second pre-cut line. This third pre-cut line is used to limit the deformation range of the top wall caused by the pressing part when it is pressed down.
[0010] Furthermore, the inner groove wall is an inclined surface that slopes toward the central axis of the bottle cap; wherein, in the first half-region, the first angle formed by the tangent of the inner groove wall and the plane perpendicular to the central axis of the bottle cap is greater than the corresponding second angle in the second half-region.
[0011] In one embodiment, the inner groove wall is a single-segment inclined surface, and the first pre-cut line is located on the bottom surface of the annular groove.
[0012] In another embodiment, the inner groove wall includes a first inclined section, a horizontal section and a second inclined section connected in sequence, wherein the first inclined section is connected to the pressing part, the second inclined section is connected to the bottom surface of the annular groove, and the first pre-cut line is located in the horizontal section.
[0013] Furthermore, the inner surface of the top wall is provided with a second sealant, which is located in the groove formed by the pressing part and the annular groove on the inner surface of the top wall, and the second sealant covers the first pre-cut line.
[0014] Compared with the prior art, this utility model has the following advantages: Firstly, this invention creates a clearly defined weak mechanical zone by setting an annular groove on the top wall of the bottle cap and a first pre-cut line located in the first half-section. Users only need to apply downward pressure to the pressing part, which will precisely and effortlessly separate from the top wall along the first pre-cut line, forming a gap. This breaks the vacuum inside the bottle or releases pressure, thus avoiding the huge rotational torque required by traditional pressure-cap bottle caps, significantly reducing opening force, and greatly improving the convenience of opening and user experience.
[0015] Secondly, by setting the first pre-cut line to an arc shape and limiting its central angle range, this utility model can optimize the stress concentration point of the initial tear, making the opening process smoother and more controllable, and avoiding opening failure or bottle cap deformation caused by improper tearing path.
[0016] Thirdly, by setting a second and a third pre-cutting line, this utility model can strictly limit the deformation of the top wall to an annular band area formed by several pre-cutting lines when the pressing part moves downward under force. This effectively prevents the deformation from spreading to unrelated areas (such as the sidewall), ensuring the integrity of the bottle cap's main structure and the reliability of the sealing area, while also making the force feedback of the opening action clearer.
[0017] Fourth, by adopting a larger inner groove wall angle in the first half-section, this utility model enables the groove wall in the first half-section to provide a stronger vertical component force when pressed, preferentially guiding the first pre-cut line to tear completely and form a gap; while in the second half-section with a smaller tilt angle, the groove wall deformation is more gradual, which can work in conjunction with the area that is not completely cut, so that the pressing part maintains a partial connection with the top wall on the second half-section side, naturally forming a flip-up hinge structure, making it safer and more convenient to use.
[0018] Fifth, by providing different structural embodiments of the inner groove wall and specifying that the first pre-cut line is located on the bottom surface or the middle plane section of the groove, this utility model provides more flexible design space for the processing positioning of the pre-cut line and the application of sealant, which is convenient for optimization according to different sealing requirements and processing technology. Attached Figure Description
[0019] Figure 1 This is a top view of Example 1 of the bottle cap.
[0020] Figure 2 Example 1 of bottle cap, along Figure 1 A sectional view along the AA direction. The bottle mouth is shown in a simplified sectional view using dashed lines.
[0021] Figure 3 Example 1 of bottle cap, in Figure 2 A magnified view of a portion of region B. It shows four types of first pre-cut lines: (a), (b), (c), and (d).
[0022] Figure 4 Example 1 of bottle cap, in Figure 2 A magnified view of a portion of region C.
[0023] Figure 5 Example 1 of bottle cap, in Figure 2 A magnified view of a portion of region D.
[0024] Figure 6 Example 2 of bottle cap, along Figure 1 A sectional view along the AA direction. The bottle mouth is shown in a simplified sectional view using dashed lines.
[0025] Figure 7 Example 2 of bottle cap, in Figure 2A magnified view of a portion of region E in the middle.
[0026] Figure 8 In embodiment two of the bottle cap, after the pressing part is pressed down, Figure 2 A magnified view of a portion of region E in the middle.
[0027] Figure 9 This is a top view of Example 3 of the bottle cap.
[0028] Figure 10 Example 3 for bottle cap, along Figure 9 A cross-sectional view along the AA direction. Detailed Implementation
[0029] The specific embodiments of this utility model are described below with reference to the accompanying drawings. Many details are described below to provide a comprehensive understanding of this utility model; however, those skilled in the art can implement this utility model without these details.
[0030] Example 1 like Figures 1 to 5 As shown, the resealable cap with vacuum and pressure relief buttons is made of a thin metal sheet and includes a top wall 1, side walls 2 extending downward from the periphery of the top wall 1, and a connecting structure formed on the side walls for sealing connection with the bottle body. The top wall 1 is divided into a first half-region and a second half-region by a reference line Q1 passing through its center. The top wall 1 has an annular groove 12, and a pressing part 11 for downward movement under pressure is formed inside the annular groove 12. The inner wall or bottom surface of the annular groove 12 has a first pre-cut line 101 located in the first half-region around the pressing part 11. The first pre-cut line 101 is used to separate the pressing part 11 from the rest of the top wall 1 when subjected to downward pressure, thereby forming a gap connecting the inside and outside of the bottle cap.
[0031] like Figure 2 As shown, the aforementioned connection structure of the bottle cap includes, but is not limited to, the snap-fit interface 30 formed by the upturned edge 31 provided on the edge of the bottom wall 3, which is a reusable and resealable design. This is a conventional connection structure of existing bottle caps, and its specific structure will not be described in detail. Of course, those skilled in the art can also use other conventional connection structures to replace the snap-fit interface 30 formed by the upturned edge 31.
[0032] like Figure 1 and Figure 2 As shown, the pressing part 11 is an inclined surface where the first half is higher than the second half.
[0033] like Figure 1 and Figure 2As shown, the annular groove 12 includes an inner groove wall, a groove bottom surface 124, and an outer groove wall 125 connected in sequence. The inner groove wall of the annular groove 12 is an inclined surface oriented towards the central axis Q1 of the bottle cap. In the first half-region, the first angle α formed by the tangent e1 of the inner groove wall of the annular groove 12 and the plane perpendicular to the central axis Q2 of the bottle cap is greater than the corresponding second angle β in the second half-region (i.e., the angle formed by the tangent e2 of the inner groove wall of the annular groove 12 and the plane perpendicular to the central axis Q2 of the bottle cap).
[0034] By using a larger inner groove wall angle (i.e., the first angle α) in the first half-zone, the groove wall in the first half-zone can provide a stronger vertical component force when pressed, preferentially guiding the first pre-cut line 101 to tear completely and form a gap; while in the second half-zone with a smaller inner groove wall angle (i.e., the second angle β), the groove wall deformation is more gradual, which can work in conjunction with the area that is not completely cut, so that the pressing part 11 maintains a partial connection with the top wall 1 on the second half-zone side, naturally forming a flip-up hinge structure, which is safer and more convenient to use.
[0035] like Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, the inner wall of the annular groove 12 includes a first inclined section 121, a horizontal section 122, and a second inclined section 123 connected in sequence. The first inclined section 121 is connected to the pressing part 11, and the second inclined section 123 is connected to the bottom surface 124 of the annular groove 12. The first pre-cut line 101 is located in the horizontal section.
[0036] like Figure 1 and Figure 2 As shown, the first pre-cutting line 101 is arc-shaped. Preferably, the central angle of the first pre-cutting line 101 is greater than or equal to 60° and less than or equal to 180°. Preferably, the central angle of the first pre-cutting line 101 is 160°.
[0037] like Figure 2 and Figure 3 As shown, the first pre-cut line 101 can be a pre-cut line that completely cuts off the top wall 1, and its cross-section is as follows: Figure 3 As shown in (a) and (b) in the figure. Of course, the first pre-cut line 101 can also be a pre-cut line that does not completely cut off the top wall 1, and its cross-section is as shown in the figure. Figure 3As shown in (c) and (d), the thickness of the top wall 1 is typically between 0.20 mm and 0.30 mm. Taking a thickness of 0.25 mm for the top wall 1 as an example, the cutting thickness of the first pre-cutting line 101 is between 0.15 mm and 0.20 mm, meaning the uncut thickness is between 0.10 mm and 0.05 mm. Depending on the specific requirements, existing cutting technologies such as laser cutting, wire cutting, or plasma arc cutting can be used to process the first pre-cutting line 101.
[0038] like Figures 1 to 5 As shown, preferably, the inner surface of the top wall 1 is provided with a first sealant 41 (such as rubber or plastisol), which is used to abut the bottle mouth of the bottle body 5 to improve the sealing between the bottle body 5 and the bottle cap.
[0039] Example 2 like Figures 1 to 8 As shown, the difference between Embodiment 2 and Embodiment 1 is that: a second sealant 42 (such as rubber or plastisol) is provided on the inner surface of the top wall 1. This second sealant 42 is located in the groove formed by the pressing part 11 and the annular groove 12 on the inner surface of the top wall 1, and the second sealant 42 covers the first pre-cut line 101. In one specific embodiment, the second sealant 42 is a plastisol, which is in a liquid state during processing. Through the fluidity of the liquid, the second sealant 42 fills the groove and has an extension 421 that adheres to the inner surface of the second inclined section 123, ensuring that the second sealant 42 covers the first pre-cut line 101. When the first pre-cut line 101 is a pre-cut line that completely cuts off the top wall 1, the second sealant 42 can improve the sealing performance of the bottle cap at the first pre-cut line 101. When the pressing part 11 is pressed down, the extension 421 separates from the second inclined section 123.
[0040] Example 3 like Figures 1 to 5 ,as well as Figure 9 and Figure 10 As shown, the difference between Example 3 and Example 2 is that: like Figure 9 and Figure 10 As shown, the inner wall 120 of the annular groove 12 is a single-segment inclined surface.
[0041] like Figure 9 and Figure 10As shown, the first pre-cut line 101 is located on the bottom surface 124 of the annular groove 12. The axisymmetric portion of the first pre-cut line 101 bends into a V-shape towards the pressing part 11, further optimizing the stress concentration point of the initial tear. This ensures that the axisymmetric portion of the first pre-cut line 101 can preferentially generate a gap due to deformation compared to its two ends, making the opening process smoother and more controllable, and avoiding opening failure or bottle cap deformation caused by improper tearing path. Preferably, the rounded corner of the first pre-cut line 101 is 65°.
[0042] like Figure 9 and Figure 10 As shown, in the first half-region, the annular groove 12 has a second pre-cut line 102 outside the first pre-cut line 101. This second pre-cut line 102 is used to limit the deformation range of the top wall 1 caused by the pressing part 11 pressing down. Specifically, this second pre-cut line 102 is a pre-cut line that does not completely cut off the top wall 1 (e.g., ...). Figure 3 (As shown in (c) and (d)). Taking the thickness of the top wall 1 as 0.25 mm as an example, the cutting thickness of the second pre-cutting line 102 is between 0.1 mm and 0.15 mm, that is, the uncut thickness is between 0.10 mm and 0.15 mm.
[0043] like Figure 9 and Figure 10 As shown, the annular groove 12 is provided with a third pre-cut line 103 outside the second pre-cut line 102. The third pre-cut line 103 is used to limit the deformation range of the top wall 1 caused by the pressing part 11 pressing down.
[0044] Preferably, the third pre-cut line 103 is arc-shaped, and the two ends of the arc are bent and extend toward the pressing part 11. There are multiple sets of the third pre-cut line 103, and the multiple sets of the third pre-cut line 103 are arranged in a ring around the periphery of the pressing part 11.
[0045] Preferably, it includes three sets of third pre-cutting lines 103, wherein two sets of third pre-cutting lines 103 are symmetrically arranged in the first half-region, and their central angles are both 70° to 80°; and one set of third pre-cutting lines 103 is arranged in the first half-region, and its central angle is 160° to 170°.
[0046] This embodiment, by setting a second pre-cut line and a third pre-cut line, can strictly limit the deformation of the top wall 1 to an annular band area formed by several pre-cut lines when the pressing part 11 moves downward under force. This effectively prevents the deformation from spreading to unrelated areas (such as the side wall), ensuring the integrity of the bottle cap's main structure and the reliability of the sealing area, while also making the force feedback of the opening action clearer.
[0047] The above are merely specific embodiments of this utility model, but the design concept of this utility model is not limited thereto. Any non-substantial modifications made to this utility model using this concept shall be considered as an infringement of the protection scope of this utility model.
Claims
1. A resealable cap with vacuum and pressure release buttons, made of sheet metal, comprising a top wall, side walls extending downward from the periphery of the top wall, and a connection structure formed on the side walls for sealing connection with a bottle body, characterized in that: The top wall is divided into a first half-section and a second half-section by a baseline passing through its center. The top wall is provided with an annular groove, and a pressing part for downward movement under pressure is formed on the inner side of the annular groove. The inner wall or bottom surface of the annular groove is provided with a first pre-cut line in the first half-section around the pressing part. The first pre-cut line is used to separate the pressing part from the rest of the top wall when it is subjected to downward pressure, thereby forming a gap connecting the inside and outside of the bottle cap.
2. The resealable cover with vacuum and pressure relief buttons according to claim 1, characterized in that: The first pre-cut line is arc-shaped.
3. The resealable cover with vacuum and pressure relief buttons according to claim 1, characterized in that: The first pre-cut line bends in a V-shape towards the pressing part at its axis of symmetry.
4. The resealable cover with vacuum and pressure relief buttons according to claim 1, characterized in that: In the first half-region, the annular groove is provided with a second pre-cut line outside the first pre-cut line. The second pre-cut line is used to limit the deformation range of the top wall caused by the pressing part when it is pressed down.
5. The resealable cover with vacuum and pressure relief buttons according to claim 4, characterized in that: The annular groove has a third pre-cut line outside the second pre-cut line. The third pre-cut line is used to limit the deformation range of the top wall caused by the pressing part when it is pressed down.
6. The resealable cover with vacuum and pressure relief buttons according to any one of claims 1-5, characterized in that: The inner groove wall is an inclined surface that slopes toward the central axis of the bottle cap; wherein, in the first half-region, the first angle formed by the tangent of the inner groove wall and the plane perpendicular to the central axis of the bottle cap is greater than the corresponding second angle in the second half-region.
7. The resealable cover with vacuum and pressure relief buttons according to claim 6, characterized in that: The inner groove wall is a single-segment inclined surface, and the first pre-cut line is located on the bottom surface of the annular groove.
8. The resealable cover with vacuum and pressure relief buttons according to claim 6, characterized in that: The inner groove wall includes a first inclined section, a horizontal section and a second inclined section connected in sequence. The first inclined section is connected to the pressing part, the second inclined section is connected to the bottom surface of the annular groove, and the first pre-cut line is located in the horizontal section.
9. The resealable cover with vacuum and pressure relief buttons according to claim 8, characterized in that: The inner surface of the top wall is provided with a second sealant, which is located in the groove formed by the pressing part and the annular groove on the inner surface of the top wall, and the second sealant covers the first pre-cut line.