Double-layer bottle cap structure with storage function

Abstract

A double-layer bottle cap structure with storage function comprises an upper cover body and a lower cover body, wherein an annular groove is provided at a position where the outer ring of the barrel of the upper barrel portion of the upper cover body penetrates into the inner ring of the sleeve portion of the lower cover portion, and an O-ring is sleeved thereon, wherein the diameter of the O-ring is greater than the groove depth of the annular groove, and is squeezed by the inner ring of the sleeve portion when the outer ring of the barrel of the upper barrel portion penetrates into the inner ring of the sleeve portion of the lower cover portion, and the groove width of the annular groove is at least greater than the width of the O-ring expanded outward by being squeezed, and further, an angled beveled end is provided at the inner edge of the upper opening end of the sleeve portion, and the angle of the beveled end is less than

Description

[Technical Field]

[0001] A double-layer bottle cap structure with a accommodating function, particularly referring to a double-cap structure designed to be screwed onto the bottle mouth, wherein food ingredients are placed in the accommodating space formed by the upper cap rotating on the lower cap to achieve the effect of preservation, and when in use, by driving the upper cap to rotate and sit on the bottom of the lower cap, the bottom is broken and the food ingredients are released into the bottle mouth, thereby achieving the effect of mixing the food ingredients with the liquid in the bottle. [Previous Technology]

[0002] Most of the PET bottles or thermos bottles sold on the market are designed with a rotatable cap. The internal thread of the cap is screwed into the external thread of the bottle opening to open or lock the bottle opening. However, this design only provides the opening and closing of the bottle opening and has no other additional functions.

[0003] However, when using PET bottles or thermos flasks, users often do not use them simply for drinking water. Therefore, many PET bottles are sold for purposes such as storing tea, juice, soda, or coffee. However, with the rise of environmental awareness and health consciousness, consumers prefer to add more natural tea leaves, dried fruit pieces, or concentrated juices to their drinking water. These are products with clear origins, higher quality, and healthier options. However, carrying these products with them is inconvenient and easy to forget, which greatly reduces their portability. Therefore, some companies have tried to develop bottle caps that can hold added products. The key to the development of this type of bottle cap is to pre-install the cap and quickly put the contents of the cap into the drinking water before drinking.

[0004] Chinese utility model patent No. M583832 was developed to address this need. Its specification, referencing the conventional structural design in Figure 1, states: In this type of storage bottle cap structure, the preservation principle of the raw material is mainly achieved through the tight seal between the material cylinder and the inner tube. Therefore, if there are tolerances between these two components, or if the storage environment is unfavorable, moisture and bacteria outside the cap can easily penetrate into the storage space, causing the raw material to deteriorate, or the liquid inside the bottle to leak out during use. It is clear that utility model patent No. M583832 is designed to solve the shortcomings of conventional cap structures, such as the easy penetration of moisture and bacteria outside the cap into the storage space, causing raw material deterioration, or leakage of liquid inside the bottle during use.

[0005] Please refer to the partial cross-sectional side view of the conventional patent in its fitted state shown in Figure 1. However, in actual use, the means by which this cap solves the problem of moisture and bacteria intruding into the storage space and the leakage of liquid from the bottle during use is as shown in Figure 5 of its new utility model patent M583832. The storage cylinder (P22) is tightly fitted into the straight cylinder section. The convex ring (P311) and the first concave ring (P211) interlock to form an airtight and positioning function. When pressed down, as shown in Figure 5 of the new utility model patent M583832, the so-called convex ring (P311) eventually moves to the position of the second concave ring (P212) and is opposite to the reinforcing ring (P221). Accordingly, under the state of mutual compression between the convex ring (P311) and the reinforcing ring (P221), the pressure on the outer cap wall can be greatly enhanced. (P21) provides a seal between the cap and the cap holder, but this design has the following serious drawbacks: First, the cap itself is made of rigid plastic. Regardless of the degree of mutual compression between the raised ring (P311) and the sealing ring (P221), there will always be a gap. Alternatively, the pre-designed protrusion size of the raised ring (P311) and the sealing ring (P221) must be made larger to achieve a certain degree of airtightness. However, this excessive stress will increase the chance of the cap breaking, and the increased resistance will make it difficult for consumers, especially women, to manually twist and turn the cap to release the contents, greatly reducing overall convenience. Second, to move the raised ring (P311) to the position of the second concave ring (P212) and the sealing ring (P221), The relative standard requires a significant increase in the precision of mold opening, which contradicts the need for mass production and low cost of bottle caps. Furthermore, after the plastic is injection molded, it still needs to go through a demolding process, which makes it easier for precision variations to occur, resulting in failure to seal, thus increasing production difficulty and practicality. [Summary of the Invention]

[0006] A double-layered bottle cap structure with a accommodating function includes an upper cap body. The upper end of the upper cap body is a first gripping part, and the lower end is an upper cylindrical part, which forms an accommodating part inside. The lower end of the upper cylindrical part has a beveled opening, and a threaded part is formed between the first gripping part and the upper cylindrical part. The threaded part has an internal thread on the inner edge of the first embossed part. The lower cap body has a cylindrical body with a double-through fitting part at the top and bottom. The middle section has a second embossed part with a larger outer diameter. The lower cap part has an external thread on the outer ring of the cylindrical body above the second embossed part. The cylindrical body below the second embossed part is a lower cylindrical part with a bottom opening. The lower cylindrical part fits into the corresponding upper bottle mouth diameter. An inner groove space of a fitting part is formed between the second embossed part and the lower cylindrical part. The fitting part has a fitting part on the inner edge of the second embossed part. The thread can be screwed into the thread on the outer ring of the bottle mouth. The main feature of this invention is that: an annular groove is formed at the position where the outer ring of the upper cylinder enters the inner ring of the fitting part of the lower cover, and an O-ring is fitted thereon. The diameter of the O-ring is greater than the groove depth, and it is squeezed by the inner ring of the fitting part when the outer ring of the upper cylinder enters the inner ring of the fitting part of the lower cover. The groove width is at least greater than the width of the O-ring that expands outward under pressure. Furthermore, an angled bevel is formed at the inner edge of the upper opening end of the fitting part. The angle of the bevel is less than 45°. The bevel and the outer ring of the upper cylinder enter the fitting part of the lower cover and form a gap one with the outer ring of the upper cylinder. The diameter of the O-ring protrudes beyond the groove depth of the annular groove, forming a gap two. The gap one is greater than the gap two.

[0007] A secondary feature of the present invention is that: the outer ring of the first gripping part is a first embossed part; the second embossed part is designed to have the same diameter as the first gripping part; and a sealing film is bonded to the lower opening.

Implementation Method

[0008] The present invention provides a double-layer bottle cap structure with a storage function, which is designed in response to the conventional structure. In addition to maintaining the design of the bottle cap and making it easy to manufacture, it can fundamentally solve the shortcomings of the conventional structure that cannot be sealed reliably. This makes the already convenient double-layer bottle cap with a storage function not only have the effect of sealing and preservation, but also has excellent cost-effectiveness. Moreover, it is simpler and cheaper than the structure of the previous patent.

[0009] Please refer to Figure 2, which shows a three-dimensional assembly diagram of the preferred embodiment of the present invention; Figure 3, which shows a three-dimensional exploded view of the preferred embodiment of the present invention; and Figure 4, which shows a three-dimensional exploded side view of the preferred embodiment of the present invention. The double-layer bottle cap structure with accommodating function is the same as the conventional structure. The structure is mainly composed of a cylindrical structure of an upper cap 10 and a lower cap 20 connected together to form the main body. Further, the upper cap 10 has a first gripping part 11 with a closed top at the upper end and an upper cylindrical part 12 at the lower end. The outer ring of the first gripping part 11 is a first embossed part 111. The upper cylindrical part 12 is a hollow cylindrical body, and an accommodating part 124 is formed inside. The lower end opening of the upper cylindrical part 12 is a beveled cut 123. An inner groove space of a screw connection part 112 is formed between the first embossed part 111 of the first gripping part 11 and the upper cylindrical part 12. The screw connection part 112 is located in the first... An internal thread 1121 is formed on the inner edge of the embossed part 111; the lower cover part 20 is a cylindrical body of a double-through fitting part 22, and the middle section of the lower cover part 20 is provided with a second embossed part 21 with a larger outer diameter. The second embossed part 21 is designed to have the same diameter as the first embossed part 111 of the first gripping part 11. The lower cover part 20 has an external thread 221 on the outer ring of the cylindrical body above the second embossed part 21, and the lower cylindrical body below the second embossed part 21... The lower cylindrical part 23 has a bottom opening 231. The diameter of the lower cylindrical part 23 is smaller than that of the bottle mouth 31 at the upper end of the corresponding bottle 30. A slotted space 211 is formed between the second embossed part 21 and the lower cylindrical part 23. The slotted part 211 is located on the inner edge of the second embossed part 21 and has a threaded connection 212 that can be screwed into the thread 311 on the outer ring of the bottle mouth 31. The lower opening 231 is bonded with a sealing film 24.

[0010] Please refer to Figure 5, a partial cross-sectional side view of the preferred embodiment of the present invention. The present invention is characterized in that: an annular groove 121 is formed at the position where the outer ring of the upper cylindrical portion 12 penetrates the inner ring of the fitting portion 22 of the lower cover portion 20, and an O-ring 122 is fitted thereon. The diameter of the O-ring 122 is greater than the groove depth of the annular groove 121, and it is squeezed by the inner ring of the fitting portion 22 when the outer ring of the upper cylindrical portion 12 penetrates the inner ring of the fitting portion 22 of the lower cover portion 20. The groove width of the annular groove 121 is at least greater than the width of the O-ring 122 when squeezed outwards. Furthermore, an oblique end 222 with an angle θ is formed on the inner edge of the upper opening end of the fitting portion 22. The angle of the oblique end 222 is less than 45°. The oblique end 222 and the fitting portion 222 are connected by the outer ring of the upper cylindrical portion 12 penetrating the fitting portion 22 of the lower cover portion 20. The inner ring of the upper cylindrical part 12 and the outer ring of the upper cylindrical part 12 form a gap W1, and the diameter of the O-ring 122 protrudes beyond the groove depth of the ring groove 121 to form a gap W2. The gap W1 is greater than the gap W2. Through the above structural design, when the O-ring 122 is inserted into the inner ring of the fitting part 22 of the lower cover part 20 by the outer ring of the upper cylindrical part 12, it is squeezed by the inner ring of the fitting part 22. The angle θ of the beveled end 222 allows the O-ring 122 to be smoothly squeezed outward within the groove width of the ring groove 121 and will not slip out of the ring groove 121. The elasticity of the O-ring 122 can achieve the best sealing effect by fitting against the inner ring of the fitting part 22 of the lower cover part 20 to form an excellent airtight and leak-proof effect. Moreover, the durability and deformation resistance of the O-ring 122 can solve the problem of the inability to be reused due to structural deformation in the prior art.

[0011] Please refer to Figure 6, a cross-sectional side view of the assembled structure of the preferred embodiment of the present invention, and Figure 7, a cross-sectional side view of the assembled structure of the preferred embodiment of the present invention. During assembly, first, by holding the first gripping part 11 at the upper end of the upper cover 10, drive the lower end of the upper cylinder 12 so that the outer ring of the upper cylinder 12 passes into the fitting part 22 of the lower cover 20. The internal thread 1121 of the screw-in part 112 aligns with the external thread 221 of the outer ring of the lower cover 20 above the second embossed part 21 and is then screwed in. During installation, the depth of the oblique cut 123 at the lower end of the upper cylinder 12 does not exceed the lower opening 231 at the bottom end of the lower cylinder 23. Then, the contents T, such as tea leaves, dried fruit particles, or concentrated juice, which are to be placed in the receiving part 124, can be placed thereafter. The lower opening 231 is sealed with a sealing film 24. At the same time, when the O-ring 122 passes through the outer ring of the upper cylinder 12 and enters the inner ring of the fitting part 22 of the lower cover 20, it is squeezed by the inner ring of the fitting part 22 and produces the best airtight and leak-proof effect, which can greatly maintain the freshness of the contents T. In use, the inner edge of the second embossed part 21 is further rotated to form a fitting thread 212, so that the fitting part 211 can be screwed and fixed to the bottle mouth 30 with the thread 311 that is also formed on the outside of the bottle mouth 31. If it is desired to mix the contents T with water, the first gripping part 11 is driven to rotate, so that the cylinder of the upper cylinder 12 rotates downward and moves downward, and the oblique cut 123 at the lower end of the upper cylinder 12 protrudes downward and cuts the sealing film 24, so that the contents T can be mixed with water and then left to stand for drinking.

[0012] Through the above-described structural design of the present invention, the following effects can be achieved: First, by having an angle of less than 45° for the beveled end 222, and by having the beveled end 222 and the outer ring of the upper cylinder 12 pass into the fitting portion 22 of the lower cover 20 to form a distance of W1 with the outer ring of the upper cylinder 12, and by having the diameter of the O-ring 122 protrude beyond the groove depth of the ring groove 121 to form a distance of W2, wherein the distance W1 is greater than the distance W2, the above-described structural design allows the O-ring 122 to be aligned with the upper cylinder 122. The O-ring 122, when compressed and expanded outward within the width of the groove 121, will not fall out of the groove 121, achieving excellent airtightness and leak-proof effect; secondly, through the physical properties of the O-ring 122, even after the contents T leave the sealing film 24, the overall structure still has a leak-proof effect; thirdly, through the physical properties of the O-ring 122, the overall structure can be repeatedly recycled and reused, avoiding one-time waste; in summary, the present invention meets the requirements of novelty and inventiveness under the patent law, and there is no similar design or patent published prior to it, therefore, an invention patent application is filed in accordance with the law. [Simplified Explanation of the Diagram]

[0013] Figure 1: A partial cross-sectional side view of the fitted state of a conventional patent; Figure 2: A three-dimensional assembly schematic diagram of the preferred embodiment of the present invention; Figure 3: A three-dimensional exploded schematic diagram of the preferred embodiment of the present invention; Figure 4: A three-dimensional exploded side view schematic diagram of the preferred embodiment of the present invention; Figure 5: A partial cross-sectional side view schematic diagram of the preferred embodiment of the present invention; Figure 6: A cross-sectional side view schematic diagram of the completed structural assembly of the preferred embodiment of the present invention; Figure 7: A cross-sectional side view schematic diagram of the preferred embodiment of the present invention after structural assembly.

Claims

1. A double-layer bottle cap structure with a accommodating function, comprising: an upper cap body (10): the upper end of the upper cap body (10) is a first gripping part (11), the lower end is an upper cylindrical part (12), the interior of which forms an accommodating part (124), the lower end of the upper cylindrical part (12) is provided with a beveled cut (123), and a screw connection part (112) is formed between the first gripping part (11) and the upper cylindrical part (12), the screw connection part (112) is provided with an internal thread (1121) on the inner edge of the first embossed part (111); The lower cap (20) has a cylindrical body with a double-through fitting part (22) at the top and bottom. The middle section is provided with a second embossed part (21) with a larger outer diameter. The lower cap part (20) has an external thread (221) on the outer ring of the cylindrical body above the second embossed part (21). The lower cylindrical body below the second embossed part (21) is a lower cylindrical part (23) with a lower opening (231) at its bottom end. The lower cylindrical part (23) fits into the mouth (31) of the corresponding bottle (30). An inner groove space of a fitting part (211) is formed between the second embossed part (21) and the lower cylindrical part (23). The fitting part (211) is provided with a fitting thread (212) on the inner edge of the second embossed part (21) and can be screwed with the thread (311) on the outer ring of the bottle mouth (31). The present invention is characterized in that: an annular groove (121) is formed at the position where the outer ring of the upper cylindrical part (12) penetrates the inner ring of the fitting part (22) of the lower cover part (20), and an O-ring (122) is fitted thereon, wherein the diameter of the O-ring (122) is greater than the groove depth of the annular groove (121), and is squeezed by the inner ring of the fitting part (22) when the outer ring of the upper cylindrical part (12) penetrates the inner ring of the fitting part (22) of the lower cover part (20), and the groove width of the annular groove (121) is at least greater than the width of the O-ring (122) that expands outward under pressure, and so on. The inner edge of the upper opening of the fitting part (22) of the first step has a beveled end (222) with an angle (θ). The angle (θ) of the beveled end (222) is less than 45°. The beveled end (222) and the outer ring of the upper cylinder (12) pass into the fitting part (22) of the lower cover (20) and form a gap one (W1) with the outer ring of the upper cylinder (12). The diameter of the O-ring (122) protrudes outside the groove depth of the ring groove (121) to form a gap two (W2). The gap one (W1) is greater than the gap two (W2).

2. A double-layer bottle cap structure with a accommodating function as described in claim 1, wherein the outer ring of the first grip portion (11) is a first embossed portion (111); the second embossed portion (21) is designed to have the same diameter as the first grip portion (11).

3. A double-layered bottle cap structure with a accommodating function as described in claim 1, wherein the lower opening (231) is bonded to a sealing film (24).

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