A type of storage bottle cap

Abstract

This utility model discloses a storage bottle cap, comprising a cap body and a sleeve inserted therein; the cap body has at least two protrusions evenly distributed around its inner top wall, and a boss and annular flange forming an annular gap on its bottom surface, with a sealing ring on the outer wall of the boss, and a through hole at the bottom of the cap body; the sleeve has a storage cavity inside, and includes a sealing section, a guide section, and an operating section; the sealing section has a tapered section that tapers downwards from the outer radial direction, and the sealing section and the cap body are slidably sealed by a sealing structure; the guide section has a guide groove structure on its outer wall, which includes a connecting locking groove and a spiral groove, with the lower wall of the locking groove being horizontal; the operating section extends out of the cap body and is threadedly connected to the top cap; when the protrusions enter the locking groove, the outer wall of the tapered section and the inner wall of the annular flange are press-fitted to form a tapered seal, while the inner wall of the sealing section and the sealing ring are press-fitted to seal the bottom of the storage cavity; the top cap seals the top of the storage cavity through a sealing component. This structure achieves vibration-resistant sealing and a double moisture-proof sealing barrier, and is convenient and reliable to operate.

Description

Technical Field

[0001] This utility model relates to the field of packaging and sealing technology, and in particular to a storage-type sealing bottle cap. Background Technology

[0002] Bottle caps are widely used in bottled products containing various liquids, but the vast majority are ordinary caps with snap-on or threaded structures, serving only to seal and prevent external contamination of the bottle's contents. In the beverage and pharmaceutical industries, premixed liquids often require the addition of preservatives to maintain stability. Storage-type bottle caps, through separate storage technology, can reduce the use of preservatives. For example, patent document CN 116714891 A discloses a powder-liquid separation bottle cap. Its structural design involves a powder bottle with a connecting hole at the bottom, which is movably inserted into the inner cylinder of the bottle cap. A thermoplastic elastomer sealing ring on the outer wall of the powder bottle is press-fitted into the inner cylinder to achieve a seal. A sealing cap is located at the top of the powder bottle, used to push the powder bottle downwards and close its opening. In use, pressing the sealing cap causes the powder bottle to move downwards, exposing the connecting hole at the lower edge of the inner cylinder. The contents fall into the bottle through the connecting hole and mix with the water in the bottle. After shaking, the bottle cap is removed for drinking. This type of bottle cap avoids the need for additional preservatives and meets health requirements. However, existing technologies have some shortcomings regarding this type of storage bottle cap:

[0003] 1. Defects in the adaptability of the moisture barrier structure. While this type of cap can meet the sealing requirements of conventional storage materials, it is insufficient in applications with stringent moisture-proof requirements. It relies solely on a single radial seal with an interference fit between the sealing ring and the inner wall of the powder bottle, lacking a synergistic moisture-proof system with redundant sealing units for compensation. Its moisture barrier capability faces challenges in moisture resistance. Accelerated experiments in a constant-temperature incubator showed that storing black tea powder with this type of cap in an environment with 90% RH and 40°C resulted in an agglomeration rate greater than 25% after 14 days; its moisture-proof performance needs optimization.

[0004] 2. Lack of sealing mechanism under transportation vibration conditions. During transportation vibration, this type of bottle cap lacks continuous axial restraint to maintain radial interference stability, leading to loosening of the powder bottle and damage to the sealing interface, thus exacerbating moisture intrusion.

[0005] 3. Inconvenient operation. This type of bottle cap requires a pressure-resistant cap on the bottle neck to prevent accidental opening during transportation. When using it, the pressure-resistant cap must be removed first, and then the sealing cap must be pressed to release the seal. Pressing this cap is prone to jamming and requires overcoming significant friction. Furthermore, the sealing cap and the powder bottle lack independent positioning. After releasing the seal by pressing, lifting the sealing cap causes the powder bottle to move upwards simultaneously, obscuring the connecting hole. Because the powder bottle and sealing cap are linked, lifting will cause the already opened connecting hole to be obscured again. The functional coupling and mutually exclusive operation directions mean that after releasing the contents by pressing the sealing cap, it is impossible to simply remove the sealing cap. Therefore, users must rotate and disassemble the entire 5cm long bottle cap, making it impossible to remove the top cap separately, resulting in inconvenient operation. Utility Model Content

[0006] To address the aforementioned technical problems, the purpose of this utility model is to provide a storage-type bottle cap that comprehensively improves moisture-proof and shock-resistant performance while achieving ease of operation. To achieve this objective, the technical solution adopted by this utility model is as follows:

[0007] A storage bottle cap, comprising:

[0008] The cover is a cylindrical shape with an open top, and at least two protrusions are evenly distributed on the inner wall near the opening. The lower side wall of the cover has multiple through holes, and the bottom has a bottom surface. The center of the bottom surface protrudes upward to form a cylindrical boss, and extends upward to form an annular flange in the outer peripheral area, forming an annular gap between the two. A sealing ring is provided on the outer peripheral wall of the boss.

[0009] The sleeve is a cylindrical shape with openings at the top and bottom, and its inner cavity forms a storage chamber. It is coaxially inserted into the cover body. The sleeve includes a sealing section, a guide section, and an operating section from bottom to top. The outer diameter of the sealing section is smaller than the maximum outer diameter of the guide section. The lower part of the sealing section has a tapered section that gradually tapers downwards from the outer radial direction. The height of the tapered section is greater than the height of the inner wall of the annular flange, and its bottom outer diameter is smaller than the inner diameter of the annular flange. The outer wall of the sealing section and the inner wall of the cover body are slidably sealed by a sealing structure. The outer wall of the guide section is circumferentially distributed with the same number of guide grooves as the protrusions and is slidably adapted. Each guide groove structure includes a spiral groove and a locking groove. The locking groove is located on the upper part of the outer wall of the guide section, extends horizontally circumferentially, and has a closed end at one end and an open starting end at the other end. The lower wall of the locking groove is perpendicular to the axis. The spiral groove is connected to the starting end and extends spirally downward in the circumferential direction away from the closed end to the closed ending end. The operating section extends out of the top of the cover. The outer wall of the operating section is provided with an external thread with the same spiral direction as the spiral groove, and a top cover is detachably connected to it through the external thread. The top cover is provided with a sealing component and is sealed to the top of the operating section to seal the top of the storage cavity. When the protrusion enters the locking groove, its lower end face presses against the lower groove wall of the locking groove, so that the conical section wedges into the annular gap and its bottom end face abuts against the bottom surface. At the same time, the outer wall of the conical section is press-fitted with the inner wall of the annular flange to form a conical seal, and the lower inner wall of the sealing section is press-fitted with the sealing ring to seal the bottom of the storage cavity together with the conical seal.

[0010] Preferably, the angle between the generatrix of the outer wall of the conical section and the axis of the sleeve is 5 to 25 degrees.

[0011] Preferably, the angle between the generatrix of the outer wall of the conical section and the axis of the sleeve is 15 degrees.

[0012] Preferably, the minimum interference fit between the outer wall of the conical section and the inner wall of the annular flange is 0.05 mm, and the maximum interference fit is 0.35 mm.

[0013] Preferably, the height of the inner wall of the annular flange is 1.5-4mm, the height of the conical section is 1.1-1.5 times the height of the inner wall of the annular flange, and the height of the side wall of the boss is 2.5-6mm.

[0014] Preferably, the number of bumps is 2 to 4.

[0015] Preferably, the number of both the bump and the guide groove structure is three.

[0016] Preferably, the axial cross-section of the guide groove structure is rectangular, and its opening direction is radially outward.

[0017] Preferably, the guide groove structure includes a groove or a guide rail groove. The groove is formed by a partial integral recess in the outer wall of the guide section, and the guide rail groove is formed by a protrusion integrally provided on the outer wall of the guide section. The outer wall of the guide section or the protrusion on the lower wall of the locking groove is provided with a guide slope.

[0018] Preferably, the outer wall of the guide section is further provided with slots of the same number as the guide groove structure, the slots are located directly below the locking groove outside the groove, and the width of the slots is greater than the width of the protrusion.

[0019] Preferably, the outer wall of the operating section is further integrally provided with an annular boss located at the lower part of the external thread axis, and the outer wall of the annular boss is further provided with a plurality of anti-slip textures I.

[0020] Preferably, the lower part of the external thread on the outer wall of the operating section is further integrally provided with a linkage sealing ring that is interference-fitted with the lower part of the inner wall of the top cover. The interference fit is configured such that the torque required to release the interference fit is greater than the torque required to rotate the sleeve until the protrusion is at the end of the spiral groove. The cylindrical part of the linkage sealing ring has a height of 2-5mm, the top of the linkage sealing ring has a chamfer, and the interference fit amount is 0.05-0.2mm.

[0021] Preferably, the spiral groove has a vertically integrally formed locking block near the end of the spiral groove, and a limiting area is formed between the locking block and the end of the spiral groove. The width of the limiting area is greater than the width of the protrusion, and the locking block has an inclined surface to guide the protrusion to slide in.

[0022] Preferably, the outer wall of the guide section is further integrally provided with a sealing convex ring II located axially above the guide groove structure, and the sealing convex ring II is interference-fitted with the inner wall of the top of the cover.

[0023] Preferably, an annular elastic sealing gasket is further provided on the bottom surface in the area between the boss and the annular flange. When the boss is engaged in the locking groove, the bottom end face of the conical section compresses the elastic sealing gasket to form an axial end face seal. The annular elastic sealing gasket is made of thermoplastic elastomer or silicone.

[0024] Preferably, a sealing ring III is integrally formed on the outer side wall of the cap, located axially above the through hole, and the sealing ring III is press-fitted with the inner wall of the bottle mouth to form a seal.

[0025] Preferably, an outer cover is integrally formed on the circumferential side of the outer wall of the cap, and an internal thread II is provided on the inner side of the outer cover, which is connected to the bottle mouth; an inner sealing ring I is integrally formed on the inner top wall of the outer cover; and a plurality of anti-slip textures II are integrally formed on the outer wall of the outer cover.

[0026] Preferably, the sealing component of the top cover is an inner sealing ring II, which is integrally disposed on the inner top wall of the top cover and forms a seal with an interference fit with the inner top wall of the operating section; the inner side wall of the top cover is further integrally provided with an internal thread I that matches the external thread; the outer wall of the top cover is further provided with a plurality of anti-slip textures III.

[0027] Preferably, the sealing structure is a sealing ring I, which is fixedly disposed on the inner wall of the cover body above the through hole in the axial direction, and the sealing ring is interference-fitted with the outer wall of the sealing section.

[0028] Preferably, the lower end of the top cover is further provided with an anti-theft ring, and the outer wall of the top of the cover is further integrally provided with a retaining ring that cooperates with the anti-theft ring.

[0029] Preferably, the sleeve, cover and top cover are each made of polyethylene or polypropylene.

[0030] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0031] 1. Dual moisture-proof synergistic barrier: The cone-shaped section and the annular flange form a cone seal by pressing the locking groove with the protrusion. This not only provides a higher sealing specific pressure, but also adapts to compensate for manufacturing deviations through the cone wedge effect, while ensuring uniform contact pressure distribution, forming the core support of the outer sealing defense line. At the same time, the inner wall of the sealing section and the sealing ring are interference-sealed internally, jointly constructing a double-sealed moisture-proof defense line at the bottom of the storage cavity.

[0032] 2. Adaptive Vibration-Resistant Sealing: When the protrusion presses against the lower wall of the locking groove, it forms a direct axial stop, eliminating the risk of the sleeve moving upward and the seal failing during transportation vibration; the contact between the protrusion and the locking groove plane generates static friction, which, together with the static friction generated by the double seal, resists circumferential rotation during vibration; the continuous axial constraint force generated by the protrusion pressing against the lower wall of the locking groove causes the conical section to continuously wed the annular flange, forming an adaptive conical sealing interface. Through the conical wedge effect, it automatically compensates for the small displacements caused by transportation vibration, maintains full circumferential contact of the sealing interface, and maintains a constant sealing state during transportation vibration. It is more adaptable in dynamic working conditions and effectively achieves vibration resistance during transportation.

[0033] 3. Decoupled split operation convenience: Through the cooperation of the protrusion and guide groove structure, an independent motion and state control system is formed, which extends the operating section on the top of the cover and the external thread with the same rotation direction as the spiral groove. This eliminates the defects of mutually exclusive operating directions and the inability to disassemble the top cover separately, realizing operation decoupling. The operation action is simplified from multiple actions to a single rotation action, making operation more convenient. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the split structure of Embodiment 1 of this utility model;

[0035] Figure 2 This is a schematic diagram of the overall structure of Embodiment 1 of this utility model;

[0036] Figure 3 This is a cross-sectional view of the sleeve in Embodiment 1 of this utility model;

[0037] Figure 4 yes Figure 3 Enlarged view of point A in the middle;

[0038] Figure 5 This is a sectional view of the top cover of Embodiment 1 of this utility model;

[0039] Figure 6 This is a cross-sectional view of the cover of Embodiment 1 of this utility model;

[0040] Figure 7 This is a top view of the cover of Embodiment 1 of this utility model;

[0041] Figure 8 This is a schematic diagram of the sleeve structure in Embodiment 2 of this utility model;

[0042] Figure 9 This is a cross-sectional view of the sleeve structure of Embodiment 3 of this utility model;

[0043] Figure 10 These are cross-sectional views of the overall structure of embodiments 3 and 4 of this utility model;

[0044] Figure 11 This is a top view of the cover of Embodiment 4 of this utility model;

[0045] In the diagram: 1. Sleeve; 2. Cover; 3. Top cover; 5. Bottom surface; 6. Boss; 7. Through hole; 8. Annular flange; 9. Outer cover; 10. Operating section; 11. Guide section; 12. Sealing section; 13. External thread; 16. Slot; 17. Annular boss; 18. Locking block; 19. Conical section; 20. Spiral groove; 21. Locking groove; 22. Annular elastic sealing gasket; 23. Limiting area; 25. Sealing ring I; 26. Sealing ring II; 27. Sealing ring III; 28. Linkage sealing ring; 30. Anti-slip pattern I; 31. Anti-slip pattern II; 32. Anti-slip pattern III; 33. Guide groove structure; 36. Protrusion; 37. Internal thread I; 38. Internal thread II; 50. Inner sealing ring I; 51. Inner sealing ring II; 61. Sealing ring; 62. Anti-theft ring; 63. Snap ring. Detailed Implementation

[0046] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art. The description is specific and detailed, but it should not be construed as a limitation on the scope of protection of the present invention.

[0047] It should be noted that the terms "installation," "setting," and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection 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.

[0048] In the description of this utility model, unless otherwise expressly specified and limited, 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.

[0049] The meaning of "and / or" in the text is that it includes three parallel options. Taking "A and / or B" as an example, it includes option A, option B, or an option that satisfies both A and B.

[0050] Example 1:

[0051] like Figure 1-7 As shown, this embodiment provides a storage bottle cap, which includes a sleeve 1 and a cap body 2.

[0052] The cover 2 is a cylindrical shape with an open top. Three protrusions 36 are evenly distributed on the inner wall near the top opening. The protrusions protrude from the inner wall surface and are fixedly connected to the inner wall. The lower side wall of the cover has multiple through holes 7, which connect the inner and outer spaces of the cover. The bottom of the cover is integrally provided with a bottom surface 5. The center of the bottom surface protrudes upward to form a cylindrical boss 6. The outer peripheral area of ​​the bottom surface extends upward to form an annular flange 8. An annular gap is formed between the boss and the annular flange, which provides an insertion space. A sealing ring 61 is provided on the outer peripheral wall of the boss.

[0053] It is understood that the number of protrusions 36 in this embodiment is not limited to 3. In this utility model, the number of protrusions can be any integer of at least 2, such as 2, 4 or more, provided that there are at least 2 and they are always evenly distributed along the inner wall circumferentially near the top opening of the cover. Other embodiments may have 2-4 protrusions. When the number of protrusions is 3, a stable equilateral triangle structure is formed in space, which makes the load stress and the force on the sealing contact surface more uniform, and the overall structure is more stable and has excellent vibration resistance.

[0054] Preferably, the outer wall of the cover 2 is further provided with an outer cover 9 in the circumferential direction, the inner side wall of the outer cover is provided with an internal thread II38, the internal thread II is connected to the bottle mouth; the inner top wall of the outer cover is further integrally provided with an inner sealing ring I50; the outer wall of the outer cover is further provided with a plurality of anti-slip textures II31.

[0055] Preferably, in this embodiment, the height of the inner wall of the annular flange 8 is 2.5mm; the height of the conical section is 3mm, and the height of the conical section is greater than the height of the inner wall of the annular flange to ensure that the seal formed by the conical section wedging downward into the inner side of the annular flange is a conical seal; the height of the side wall of the boss 6 is 4mm, and the height of the side wall of the boss is greater than the height of the inner wall of the annular flange, which further optimizes the guiding accuracy of the sleeve pressing down.

[0056] It is understood that the height of the annular flange is not limited to 2.5mm and can be adjusted within the range of 1.5-4mm; the height of the conical section is not limited to 3mm and can be adjusted within 1.1-1.5 times the height of the inner wall of the annular flange; the height of the boss sidewall is not limited to 4mm and can be adjusted within the range of 2.5-6mm; any combination of the above dimensions does not affect the implementation of this utility model. However, if the height of the inner wall of the annular flange is less than 1.5mm, the sealing contact surface is limited, and an effective seal cannot be formed, leading to a risk of leakage; if the height of the inner wall of the annular flange is greater than 4mm, although it can still be implemented, it will block part of the through hole, thus reducing the efficiency of material storage and release from the through hole, so 1.5-4mm is preferred. If the height of the conical section is less than 1.1 times the inner wall of the annular flange, the seal between the outer wall of the conical section and the inner wall of the annular flange will not form an effective conical seal. If it is greater than 1.5 times, although it will not affect the conical seal, it will increase the processing cost. Therefore, 1.1-1.5 times is preferred. A boss height of more than 6mm can also be implemented, but it will block part of the through hole, resulting in a reduction in the efficiency of material release and storage through the through hole. Although it can still be implemented if it is less than 2.5mm, it is necessary to reduce the processing error. Therefore, the adjustment is within the above range.

[0057] Preferably, the lower sidewall of the cover has six rectangular through holes 7, which penetrate the lower sidewall of the cover and are used to connect the inner and outer spaces of the cover. It is understood that the shape and number of through holes 7 can be adjusted according to the specific implementation method. The through holes 7 are not limited to rectangles, but can also be elliptical, circular or other regular shapes. The number of through holes 7 can be set to 4-8 according to actual needs, such as 4, 5, 6 or 8, as long as it meets the requirement of connecting the inner and outer spaces of the cover.

[0058] Sleeve 1 is a cylindrical shape with openings at the top and bottom. The inner cavity of the sleeve forms a storage chamber. The sleeve is coaxially inserted into the cover body. The sleeve includes a sealing section 12, a guide section 11, and an operating section 10 from bottom to top. The outer diameter of the sealing section is smaller than the maximum outer diameter of the guide section to prevent interference between the sealing section and the protrusion during assembly. The lower part of the sealing section has a tapered section 19 that tapers downwards from the outer diameter. The height of the tapered section is greater than the height of the inner wall of the annular flange, ensuring that when the tapered section is wedged into the inner side of the annular flange, the top of the tapered section is always exposed on the top surface of the annular flange, so that the tapered section and the annular flange form a tapered seal, avoiding the seal from degenerating into a cylindrical interference fit. The outer diameter of the bottom of the tapered section is smaller than the inner diameter of the annular flange, ensuring that the tapered section can be inserted into the inner side of the annular flange without interference. The outer wall of the sealing section and the inner wall of the cover body maintain a sliding seal through a sealing structure.

[0059] It should be noted that the maximum outer diameter of the guide section includes the radial height of all the protruding structures on the outer wall of the guide section.

[0060] Preferably, the sealing structure that maintains a sliding seal between the outer wall of the sealing section and the inner wall of the cap is a sealing convex ring I25. The sealing convex ring I is fixedly disposed on the inner wall of the cap located axially above the through hole. The sealing convex ring I is interference-fitted with the outer wall of the sealing section. When the sleeve moves relative to the cap within the axial movement range defined by the guide groove structure, the sealing convex ring I always maintains a sliding seal with the outer wall of the sealing section, preventing external contaminants from entering the bottle through the gap between the sleeve and the cap. It is understood that the number of the above-mentioned sealing convex rings I can be increased as needed, for example, two or more, to enhance the sealing performance. The sealing structure can also be configured as follows: a circumferential sealing convex ring is provided on the outer wall of the sealing section, and a reduced-diameter fitting section that is interference-fitted with the sealing convex ring is provided in the corresponding sliding range area on the inner wall of the cap. When the sleeve is inserted into the cap, the sealing convex ring and the reduced-diameter section interference-fit achieve a sliding seal, and its sealing effect is equivalent to that of the sealing convex ring I25.

[0061] The outer wall of the guide section is circumferentially distributed with the same number of protrusions and slidingly adapted guide groove structures 33. The guide groove structures correspond one-to-one with the protrusions. Each protrusion is embedded in the corresponding guide groove structure for sliding cooperation. Each guide groove structure includes a spiral groove 20 and a locking groove 21. The locking groove is located on the upper part of the outer wall of the guide section and extends horizontally in the circumferential direction. One end is a closed end and the other end is an unclosed starting end. The lower groove wall of the locking groove is a plane perpendicular to the axis. The protrusion and the locking groove cooperate to form an axial stop.

[0062] Preferably, the axial cross-section of the guide groove structure is rectangular, with its opening direction radially outward, ensuring that the protrusion can be embedded into the guide groove structure. Preferably, the guide groove structure 33 is a groove, which is formed by a partially integral groove on the outer wall of the guide section, wherein the outer wall of the guide section constituting the lower groove wall of the locking groove 21 is provided with a guiding slope for guiding the protrusion to slide in. It is understood that in other embodiments, the guide groove structure may also be a guide rail groove formed by protrusions.

[0063] Preferably, the outer wall of the guide segment 11 may be further evenly distributed with three slots 16, the number of slots being the same as the number of guide groove structures. Each slot is located directly below and outside the locking groove 21, and the width of the slot is greater than the width of the protrusion. It is understood that the slots are used to optimize assembly and improve assembly efficiency, and can be selected according to implementation requirements. When no slots are provided, the protrusion can slide in along the guide ramp. When slots are provided, the number of slots must be consistent with the number of guide groove structures. The number of slots can be adjusted synchronously to the same number and maintained evenly distributed according to changes in the number of guide groove structures.

[0064] The spiral groove is connected to the unclosed starting end of the locking groove, and extends spirally downward from the connection position in the circumferential direction away from the closed end of the locking groove to the closed ending end, forming a continuous path for the guide groove structure to slide along the protrusion, so that the sleeve rotates relative to the cover and achieves axial displacement. The cooperation between the protrusion and the guide groove structure forms a motion control system for the sleeve relative to the cover.

[0065] The operating section extends from the top of the cover body. The operating section is provided with an external thread 13 in the same direction as the spiral groove. The same direction of rotation is provided to avoid conflict with the rotation direction of the sleeve when rotating the top cover. The top cover 3 is detachably connected to the top of the operating section through the external thread. The top cover is provided with a sealing component and is sealed to the top of the operating section to seal the top of the storage cavity.

[0066] Preferably, the sealing component of the top cover is an inner sealing ring II51, which is integrally disposed on the inner top wall of the top cover and forms a seal with the inner top wall of the operating section; the inner side wall of the top cover is further provided with an internal thread I37 that matches the external thread, and the two form a detachable connection; the outer wall of the top cover is further provided with a plurality of anti-slip textures III32.

[0067] When the protrusion enters the locking groove, its lower end face presses against the lower wall of the locking groove, causing the conical section to wedge into the annular gap between the boss and the annular flange, with the bottom end face of the conical section abutting against the bottom surface. Simultaneously, the outer wall of the conical section and the inner wall of the annular flange are press-fitted together to form a conical seal, sealing the lower outer wall of the sleeve and creating an external seal for the lower part of the storage cavity. Furthermore, the lower inner wall of the sealing section is press-fitted with the sealing ring on the boss to form a radial seal, sealing the lower inner wall of the sleeve and creating an internal seal for the lower part of the storage cavity. (Conical seal and press-fit) Together with the sealing section, they seal the bottom of the storage cavity, forming a double seal inside and outside. At this time, the sidewall of the sealing section shields the through hole. The outer wall of the conical section converts the axial downward pressure of the protrusion and sleeve into a radial expansion force, causing the conical surface and the inner wall of the annular flange to generate pressure far exceeding that of a planar seal. During the process of the conical surface wedging into the annular flange, it can automatically fill the micro-assembly gap between the conical section and the annular flange, adaptively compensating for dimensional tolerances or deformation errors, and automatically compensating for minor displacements caused by transportation vibrations, ensuring a tight seal at the sealing interface. The continuous conical profile of the conical section interacts with the circumferential structure of the annular flange, allowing the sealing pressure to be uniformly transmitted circumferentially.

[0068] The inner cavity of the sleeve, the conical sealing interface between the outer wall of the conical section and the inner wall of the annular flange, the interference fit interface between the inner wall of the sealing section and the boss, and the sealing connection interface between the top cover and the top of the operating section together form a closed storage cavity.

[0069] In this embodiment, taking the clockwise downward spiral (i.e., right-handed) configuration of both the external thread and the spiral groove as an example, during use, rotating the operating section counterclockwise causes the sleeve to rotate counterclockwise. The guide groove structure slides counterclockwise along the protrusion, causing the protrusion to disengage from the locking groove, enter the spiral groove, and move towards the termination end. Under the cooperation of the spiral groove screw and the protrusion, the sleeve moves axially upward relative to the cover body, causing the bottom of the sealing section to disengage from the boss and annular flange on the bottom surface. The closed storage cavity is opened, and the through hole is gradually exposed to release the stored material until the closed termination end contacts the protrusion, at which point the sleeve stops rotating. After the storage cavity is opened, it remains open due to the self-locking effect of the protrusion and spiral groove cooperation without external force rotating the sleeve. Then, rotating the top cover counterclockwise will disengage the top cover from the operating section. Similarly, if both the external thread and the spiral groove are set counterclockwise, rotating the operating section and the top cover clockwise can achieve the same function. Preferably, the protrusion is configured as a cuboid, and its size is adapted to slide along the guide groove structure. It is understood that in other embodiments, the protrusion can also be other shapes adapted to the guide groove structure, such as a cube, as long as it can slide with the guide groove structure, be radially embedded in the guide groove structure, move along the trajectory of the guide groove structure to achieve stable guidance, and be axially limited in the locking groove.

[0070] Preferably, in this embodiment, the number of guide groove structures is 3, the same as the number of protrusions, and evenly distributed circumferentially. It can be understood that the number of guide groove structures always remains consistent with the number of protrusions. The number of guide groove structures is adjusted synchronously to the same number according to changes in the number of protrusions. For example, when there are 2 protrusions, there are 2 guide groove structures; when there are 4 protrusions, there are 4 guide groove structures, and so on. Regardless of how the number of guide groove structures changes, as long as the core features remain unchanged—equal circumferential distribution, the locking groove located on the upper part of the guide section's outer wall extending horizontally circumferentially, with one end closed and the other open, the axially downward groove wall being a plane perpendicular to the axis, and the spiral groove connecting to the open end of the locking groove and spiraling downwards circumferentially away from the closed end of the locking groove to the closed termination end—the implementation is not affected. The specific dimensions or spiral angle of the guide groove structure can be adaptively adjusted according to quantity requirements to ensure sliding adaptation with the protrusions. The aforementioned guide groove structure is applicable to any number configuration, and the quantity expansion logic is the same as the protrusion quantity expansion scheme described in the specification.

[0071] Preferably, in this embodiment, the angle between the generatrix of the conical section and the sleeve axis is preferably 15 degrees. It should be noted that the above angle design is not limited to 15 degrees; other embodiments can adjust it within the range of 5 to 25 degrees. However, if the cone angle is less than 5 degrees, the conical section 19 will stick to the mold during demolding, leading to a decrease in injection molding yield, and an excessively small cone angle will result in insufficient radial sealing force. If the cone angle is greater than 25 degrees, it will cause excessive deformation of the annular flange, and the contact area between the conical surface and the annular flange will decrease, resulting in a loss of sealing reliability. Therefore, the angle is adjusted within the range of 5 to 25 degrees.

[0072] Preferably, the minimum interference fit between the conical surface of the conical section and the inner wall of the annular flange is 0.05 mm, and the maximum interference fit is 0.35 mm. It is understood that if the interference fit is less than 0.05 mm, the sealing pressure is insufficient, and if it is greater than 0.35 mm, the annular flange may undergo plastic deformation. This range ensures that the sealing surface is fully compressed without plastic deformation.

[0073] Preferably, the sleeve, cover and top cover are each made of polyethylene or polypropylene.

[0074] It should be noted that the number of protrusions can be increased to 5 or more, but too many protrusions will increase the complexity and cost of the mold, and the error tolerance of the assembly will also decrease. After more than 4 protrusions, the marginal benefit of the sealing performance will decrease. The reason for having at least 2 protrusions is that if only 1 protrusion is set, the guide groove structure and the movement of the protrusion will be stuck due to the single point of force when the sleeve rotates. In addition, a single protrusion cannot provide uniform downward pressure, and the conical section and the annular flange cannot fit evenly, which will damage the seal and fail to achieve the purpose of this utility model. When there are 2 protrusions evenly distributed, although the uniformity of the pressure is weaker than that of multiple protrusions, it can still meet the basic guidance and form an effective sealing downward pressure. Therefore, there must be more than or equal to 2 protrusions. For the above reasons, the preferred number of protrusions is 2-4.

[0075] To verify the sealing reliability of this utility model, the bottle cap of this embodiment was tested in a constant temperature incubator as follows: after storing black tea powder in an environment with a temperature of 40 degrees and a humidity of 90% for 14 days, the clumping rate was less than 10%.

[0076] To verify the sealing reliability of this utility model, the bottle cap of this embodiment was subjected to a 6-hour simulated transportation vibration test in accordance with GB / T4857.7-2005. No loosening or leakage was observed at the sealing boundary of any of the 20 samples.

[0077] Working principle:

[0078] Insert the sleeve 1 into the cap 2, forming a storage cavity within the sleeve. The protrusion 36 is inserted into the guide groove structure 33. When the protrusion is engaged in the locking groove 21, the lower end face of the protrusion presses against the lower groove wall of the locking groove, causing the conical section to wedge downward into the inner side of the annular flange and gradually expand the annular flange radially. At the same time, the conical section's conical surface is pressed against the inner wall of the annular flange within the height range of the annular flange to form a conical seal. The lower inner wall of the sealing section is also press-fitted with the sealing ring 61 of the protrusion 6 to form a seal, thus achieving a double seal for the bottom of the storage cavity. Then, the contents are loaded from the top of the sleeve, and the top cap 3 is then placed on top. The top cap and the top of the operating section 10 are press-fitted to form a seal, thus sealing the top of the storage cavity. The inner cavity of the sleeve forms a closed storage cavity. Finally, the cap is fixedly installed on the bottle mouth to complete the assembly.

[0079] In use, simply rotate the operating section to rotate the sleeve. When the guide groove structure moves, the protrusion disengages from the locking groove and enters the spiral groove. With the cooperation of the spiral groove and the protrusion, the sleeve moves axially upward relative to the cap, causing the conical section to gradually separate from the annular flange, releasing the conical seal. At the same time, the inner wall of the sealing section gradually separates from the boss sealing ring 61, releasing the radial seal. As the sleeve moves upward, the side wall of the sealing section that originally covered the through hole rises, and the through hole is gradually exposed and connects with the storage cavity. The storage cavity is in the open state, allowing the contents of the storage cavity to flow into the bottle through the through hole. When the protrusion slides to the end of the spiral groove, the sleeve rises to its maximum stroke. Rotate the top cap to separate it from the operating section of the sleeve, and it is ready for use.

[0080] In summary, this utility model has the following beneficial effects:

[0081] 1. Dual Moisture-Proof Synergistic Barrier: The conical seal formed by the conical section and the annular flange through the locking groove pressed by the protrusion not only has a higher sealing specific pressure, but also adapts to compensate for manufacturing deviations through the wedge effect of the conical surface, while ensuring uniform distribution of contact pressure, forming the core support of the outer sealing defense line; at the same time, the inner wall of the sealing section and the sealing ring are interference-fitted for inner sealing, jointly constructing a dual sealing defense line. In the storage of moisture-sensitive powders, under the same conditions, compared with the single-seal bottle cap in the prior art, this structure reduces the agglomeration rate by more than 50% and improves the moisture-proof performance by 100%, making it suitable for applications of moisture-sensitive powders with strict requirements for moisture resistance.

[0082] 2. Adaptive Vibration-Resistant Sealing: When the protrusion presses against the lower wall of the locking groove, it forms a direct axial stop, eliminating the risk of the sleeve shifting upwards and the seal failing during transportation vibration. Under the pressure of the protrusion, the interference fit between the outer wall of the conical section and the inner wall of the annular flange provides radial support. The interference fit between the boss and the sealing ring and the inner wall of the sealing section forms a continuous radial constraint ring. The two work together to resist the radial displacement of the sealing interface at the bottom of the storage cavity. The contact between the protrusion and the locking groove plane generates static friction, which, together with the static friction generated by the double seal, resists circumferential rotation during vibration. The continuous axial constraint force generated by the protrusion pressing against the lower wall of the locking groove causes the conical section to continuously wed the annular flange, forming an adaptive conical sealing interface. Through the conical wedge effect, it automatically compensates for the small displacement caused by transportation vibration, maintains full circumferential contact of the sealing interface, and maintains a constant sealing state during transportation vibration. It is more adaptable in dynamic working conditions and effectively achieves vibration resistance during transportation.

[0083] 3. Decoupled Split Operation Convenience: Through the cooperation of the protrusion and guide groove structure, a motion and state control system for the sleeve and the cap is formed. It extends the operating section on the top of the cap and the external thread with the same direction of rotation as the spiral groove, eliminating the defects of mutually exclusive operating directions and the inability to disassemble the top cap separately. It achieves decoupled operation, simplifies the operation steps from 3 steps to 2 steps, and simplifies the operation action from multiple actions to a single rotation action, making the operation more convenient. It simplifies the removal of the pressure cap and the 5cm long bottle cap to only the removal of the small top cap. Moreover, the conical seal further reduces the force required to release the operation, and the operation time is reduced by one-third, making the operation more convenient.

[0084] Example 2

[0085] Reference Figure 8As shown, this embodiment is basically the same as embodiment 1, except that there are two protrusions 36 evenly distributed around the top of the inner wall of the cover, and two guide groove structures 33 are provided on the outer wall of the guide section 11. In this embodiment, the guide groove structure is a guide rail groove, which is formed by a protrusion strip integrally provided on the outer wall of the guide section. The protrusion strip corresponding to the lower groove wall of the locking groove 21 is provided with a guide slope for guiding the protrusion to slide in. This embodiment does not have a slot; the spiral groove 20 is further provided with a vertically arranged locking block 18 near the end of the spiral groove, and a limiting area 23 that can accommodate the protrusion is formed between the locking block and the end of the spiral groove. The width of the limiting area is greater than the width of the protrusion. The locking block is provided with an inclined surface to guide the protrusion to slide in. The limiting area is used to further restrict the rotation and descent of the sleeve; the outer wall of the guide section 11 is further provided with a sealing protrusion II 26 located axially above the guide groove structure. The sealing protrusion II 26 is interference-fitted with the inner wall of the top of the cap body to help enhance the sealing of the gap between the sleeve and the cap body, prevent external air from entering the bottle, and form a double seal for the gap between the sleeve and the cap body with the sealing protrusion I in embodiment 1; the outer wall of the operating section 10 is further provided with an annular boss 17 located axially below the external thread. The outer wall of the annular boss is further provided with several anti-slip textures I 30, which makes it easy for the user to rotate the sleeve to release the seal by rotating the annular boss.

[0086] Example 3

[0087] Based on Example 1, this embodiment further provides an optimized solution for driving the sleeve by rotating the top cover.

[0088] Reference Figure 9 and Figure 10 As shown, this embodiment is basically the same as embodiment 1, except that the lower part of the outer thread of the operating section (10) is further provided with a linkage sealing ring (28) that is interference-fitted with the lower part of the inner wall of the top cover. The interference fit is configured such that the torque required to release the interference fit is greater than the torque required to rotate the sleeve until the protrusion is at the end of the spiral groove. The top of the linkage sealing ring is provided with a chamfer. The interference fit between the sealing linkage ring and the bottom of the inner wall of the top cover is preferably 0.1 mm. The height of the cylindrical part of the linkage sealing ring is preferably 3 mm. The lower end of the top cover (3) is further provided with an anti-theft ring 62. The outer wall of the top of the cover is further provided with a retaining ring 63 that cooperates with the anti-theft ring.

[0089] According to GB / T 17876-2010 standard, the torque required to release the interference fit between the linkage sealing ring and the top cover under the above parameters was determined by a bottle cap torque tester to be 1.25 N·m ± 0.05 N·m. The torque required to rotate the sleeve until the protrusion is at the end of the spiral groove was determined to be 0.85 N·m ± 0.05 N·m. The torque required to release the interference fit between the linkage sealing ring and the top cover is greater than the torque required to rotate the sleeve until the protrusion is at the end of the spiral groove. When the top cover is rotated, the top cover applies torque to the sleeve through the linkage sealing ring with which it is interference fitted, thereby driving the sleeve to rotate first. The guide groove structure slides along the protrusion, causing the protrusion to disengage from the locking groove and enter the spiral groove. The sleeve is displaced axially upward by the fit between the protrusion and the spiral groove, causing the sealing section to rise and release the seal until the protrusion is at the end of the spiral groove and blocks the protrusion. Then, the top cover is rotated again to overcome the interference fit between the sealing linkage ring and the top cover, so that the top cover is disengaged from the sleeve driving section and can be removed independently.

[0090] It is understood that the height of the linkage sealing ring can be adjusted within 2-5mm, and the interference fit with the top cover can be adjusted within 0.05-0.2mm. It is only necessary to ensure that the torque required to release the interference fit between the linkage sealing ring and the top cover is greater than the torque required to rotate the sleeve until the protrusion is at the end of the spiral groove. Preferably, the difference is not less than 0.2 N·m. Those skilled in the art can ensure through routine experiments that the torque required to release the linkage sealing ring is greater than the torque required to drive the sleeve to rotate.

[0091] It should be noted that when the height of the cylindrical part of the linkage sealing ring is less than 2mm, it is easy to slip off, and the sleeve cannot be effectively driven to rotate to release the seal; when the interference fit between the sealing linkage ring and the top cover is less than 0.05, the top cover will slip against the linkage sealing ring when rotating, and the sleeve cannot be driven to rotate to release the seal; when the height of the cylindrical part of the linkage sealing ring is greater than 5mm or the interference fit between the sealing linkage ring and the top cover is greater than 0.2mm, the torque required for the user to overcome the interference fit between the sealing linkage ring and the top cover to remove the top cover is greater than 2.9N·m, which exceeds the maximum torque value specified in the industry standard GB / T17876-2010.

[0092] It should be noted that users can still release the seal by directly rotating the operating section, but the linkage sealing ring design in this embodiment further enhances convenience.

[0093] Compared to the storage bottle cap in the background technology, this implementation scheme simplifies the opening operation steps from 3 steps to 1 step, and the operation action is simplified from multiple actions to a single rotation action. By continuously rotating the top cap in the same direction, the drive sleeve can be rotated to release the seal and the top cap can be separated in sequence. The time is reduced by two-thirds and the operation is smoother. At the same time, the interference fit between the linkage sealing ring and the top cap forms an additional sealing layer, which further improves the sealing reliability of the top of the storage cavity.

[0094] Example 4

[0095] Reference Figure 10 and Figure 11 As shown, this embodiment is basically the same as embodiment 1 or 3, except that in this embodiment, the inner wall of the cap has four circumferentially distributed protrusions near the top, and the outer wall of the guide section has four guide groove structures and four slots, further enhancing the stability of the structure; in this embodiment, the inner top wall of the outer cover does not have an inner sealing ring I50, and a sealing protrusion III27 is further provided on the outer side wall of the cap 2 above the through hole axially. The sealing protrusion III27 is press-fitted with the inner wall of the bottle mouth to form a seal. An annular elastic sealing gasket 22 is further provided on the bottom surface 5 in the area between the protrusion and the annular flange. The annular elastic sealing gasket is made of thermoplastic elastomer or silicone. When the protrusion enters the locking groove, the bottom end face of the conical section compresses the elastic sealing gasket to form an axial end face seal, which, together with the original double seal in embodiment 1, forms a triple sealing barrier as an auxiliary seal;

[0096] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A storage-type bottle cap, characterized in that, include: The cover (2) is a cylindrical shape with an open top, and at least two protrusions (36) are evenly distributed on the inner wall near the opening. The lower side wall of the cover has multiple through holes (7), and the bottom has a bottom surface (5). The center of the bottom surface protrudes upward to form a cylindrical boss (6), and extends upward in the outer peripheral area to form an annular flange (8), forming an annular gap between the two. The outer peripheral wall of the boss is provided with a sealing ring (61). The sleeve (1) is a cylindrical shape with openings at the top and bottom, and its inner cavity forms a storage cavity. It is coaxially inserted into the cover body. The sleeve includes a sealing section (12), a guide section (11), and an operating section (10) from bottom to top. The outer diameter of the sealing section is smaller than the maximum outer diameter of the guide section. The lower part of the sealing section is provided with a tapered section (19) that gradually narrows downwards from the outer radial direction. The height of the tapered section is greater than the height of the inner wall of the annular flange, and its bottom outer diameter is smaller than the inner diameter of the annular flange. The outer wall of the sealing section and the inner wall of the cover body are slidably sealed by a sealing structure. The outer wall of the guide section is circumferentially distributed with guide groove structures (33) of the same number as the protrusions and slidably adapted. Each guide groove structure includes a spiral groove (20) and a locking groove (21). The locking groove is located on the upper part of the outer wall of the guide section and extends horizontally in the circumferential direction. One end is a closed end, and the other end is an unclosed starting end. The lower wall of the locking groove is a plane perpendicular to the axis. The spiral groove is connected to the starting end and extends spirally downward in the circumferential direction away from the closed end to the closed end. The operating section extends out of the top of the cover. The outer wall of the operating section is provided with an external thread (13) with the same spiral direction as the spiral groove, and a top cover (3) is detachably connected through the external thread. The top cover is provided with a sealing component and is sealed to the top of the operating section to seal the top of the storage cavity. When the protrusion enters the locking groove, its lower end face presses against the lower wall of the locking groove, so that the conical section wedges into the annular gap and its bottom end face abuts against the bottom surface. At the same time, the outer wall of the conical section and the inner wall of the annular flange are press-fitted together to form a conical seal. The lower inner wall of the sealing section is press-fitted with the sealing ring and together with the conical seal, seals the bottom of the storage cavity.

2. The storage-type bottle cap according to claim 1, characterized in that: The angle between the outer wall generatrix of the conical section (19) and the axis of the sleeve (1) is 5 to 25 degrees.

3. The storage-type bottle cap according to claim 2, characterized in that: The angle between the outer wall generatrix of the conical section (19) and the sleeve axis is 15 degrees.

4. The storage-type bottle cap according to claim 1, characterized in that: The minimum interference fit between the outer wall of the conical section and the inner wall of the annular flange is 0.05 mm, and the maximum interference fit is 0.35 mm.

5. The storage-type bottle cap according to claim 1, characterized in that: The height of the inner wall of the annular flange (8) is 1.5-4mm, and the height of the conical section is 1.1-1.5 times the height of the inner wall of the annular flange; the height of the side wall of the boss is 2.5-6mm.

6. The storage-type bottle cap according to claim 1, characterized in that: The number of the bumps (36) is 2 to 4.

7. The storage-type bottle cap according to claim 1, characterized in that: The number of both the protrusion (36) and the guide groove structure (33) is three.

8. The storage-type bottle cap according to claim 1, characterized in that: The axial cross-section of the guide groove structure is rectangular, and its opening direction is radially outward.

9. The storage-type bottle cap according to claim 1, characterized in that: The guide groove structure (33) includes a groove or a guide rail groove. The groove is formed by a partial integral recess in the outer wall of the guide section, and the guide rail groove is formed by a protrusion integrally provided on the outer wall of the guide section. The outer wall of the guide section or the protrusion on the lower wall of the locking groove (21) is provided with a guide slope.

10. The storage-type bottle cap according to claim 9, characterized in that: The outer wall of the guide section (11) is further evenly distributed with the same number of slots (16) as the guide groove structure (33). The slots are located directly below the locking groove outside, and the width of the slots is greater than the width of the protrusion.

11. The storage-type bottle cap according to claim 1, characterized in that: The outer wall of the operating section (10) is further integrally provided with an annular boss (17) located at the lower part of the external thread axis, and the outer wall of the annular boss is further provided with a plurality of anti-slip textures I (30).

12. The storage-type bottle cap according to claim 1, characterized in that: The lower part of the outer thread of the operating section (10) is further integrally provided with a linkage sealing ring (28) that is interference-fitted with the lower part of the inner wall of the top cover. The interference fit is configured such that the torque required to release the interference fit is greater than the torque required to rotate the sleeve until the protrusion is at the end of the spiral groove. The cylindrical part of the linkage sealing ring has a height of 2-5mm, and the top of the linkage sealing ring is provided with a chamfer. The interference fit amount is 0.05-0.2mm.

13. The storage-type bottle cap according to claim 1, characterized in that: The spiral groove (20) is further vertically integrally provided with a locking block (18) near the end of the spiral groove, and a limiting area (23) is formed between the locking block and the end of the spiral groove. The width of the limiting area is greater than the width of the protrusion, and the locking block is provided with an inclined surface to guide the protrusion to slide in.

14. The storage-type bottle cap according to claim 1, characterized in that: The outer wall of the guide section is further integrally provided with a sealing convex ring II (26) located axially above the guide groove structure. The sealing convex ring II (26) is interference-fitted with the inner wall of the top of the cover.

15. The storage-type bottle cap according to claim 1, characterized in that: An annular elastic sealing gasket (22) is further provided on the bottom surface (5) and in the area between the boss and the annular flange. When the boss is engaged in the locking groove, the bottom end face of the conical section compresses the elastic sealing gasket to form an axial end face seal. The annular elastic sealing gasket is made of thermoplastic elastomer or silicone.

16. The storage-type bottle cap according to claim 1, characterized in that: The outer side wall of the cap (2) is further integrally provided with a sealing convex ring III (27) located above the through hole axially. The sealing convex ring III (27) is press-fitted with the inner wall of the bottle mouth to form a seal.

17. The storage-type bottle cap according to claim 1, characterized in that: The outer wall of the cover (2) is further integrally provided with an outer cover (9) in the circumferential direction. The inner side of the outer cover is provided with an internal thread II (38), which is connected to the bottle mouth. The inner top wall of the outer cover is further integrally provided with an inner sealing ring I (50). The outer wall of the outer cover is further integrally provided with several anti-slip textures II (31).

18. The storage-type bottle cap according to claim 1, characterized in that: The sealing component of the top cover is an inner sealing ring II (51), which is integrally set on the inner top wall of the top cover and forms a seal with the inner top wall of the operating section; the inner side wall of the top cover is further integrally provided with an internal thread I (37) that matches the external thread; the outer wall of the top cover is further provided with several anti-slip textures III (32).

19. The storage-type bottle cap according to claim 1, characterized in that: The sealing structure is a sealing ring I (25), which is fixedly installed on the inner wall of the cover body above the through hole in the axial direction. The sealing ring is interference-fitted with the outer wall of the sealing section.

20. The storage-type bottle cap according to claim 1, characterized in that: The lower end of the top cover (3) is further provided with an anti-theft ring (62), and the outer wall of the top of the cover is further integrally provided with a retaining ring (63) that cooperates with the anti-theft ring.

21. The storage-type bottle cap according to any one of claims 1-20, characterized in that: The sleeve, cover, and top cover are each made of either polyethylene or polypropylene.

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