Bottle cap capable of exhausting air and relieving pressure and packaging bottle

Abstract

The utility model provides a bottle cap capable of exhausting air and relieving pressure and a packaging bottle, and relates to the technical field of food packaging. The bottle cap comprises an upper cap, a middle cap, a lower cap and a cutter, the upper cover and the middle cover are matched to form the storage cavity, the first sealing film is arranged at the opening part of the storage cavity, the second sealing film is arranged at the opening part of the lower cover, and in the opening process, the first sealing film and the second sealing film can be synchronously cut only by rotating and moving downwards through the cutter, so that basic raw materials in the storage cavity fall into the bottle body; the lower cap comprises a lower cap body, a second inner plug ring and a second sealing film, an annular mounting cavity is formed between the outer wall of the second inner plug ring and the inner wall of the lower cap body, the second sealing film pulls the second inner plug ring to enable the annular mounting cavity to deform, and the deformed second inner plug ring and the bottle opening part form an exhaust channel for gas to flow out. And automatic exhaust and pressure relief of redundant gas in the bottle body can be realized. The packaging bottle with the bottle cap is simple in structure, safe to use and capable of achieving industrial production.

Description

Technical Field

[0001] The utility model relates to the technical field of food packaging, in particular to a bottle cap and a packaging bottle capable of venting air and relieving pressure. Background Art

[0002] Bottle caps are very common items in daily life. The main function of existing bottle caps is to seal the beverage in the bottle to prevent it from spoiling. According to different functions, there are bottle caps with different shapes and different operating methods. For example, the cap of a mineral water bottle is round and is opened by twisting; the cap of a can is ring-shaped and is opened by pulling; the cap of a canned meat bottle has no fixed shape and is opened by pulling; the cap of a beer bottle is opened by prying.

[0003] Bottle caps are an important part of food and beverage packaging, and are also the first place consumers come into contact with products. Bottle caps have the function of keeping the contents sealed, as well as anti-theft and safety features, so they are widely used in bottled products.

[0004] At present, there are lids with separate sealed storage spaces on the beverage market. The principle of use is: basic raw materials (such as solid powders, concentrated liquids, drugs or probiotics, etc.) are filled into a lid with a sealed storage space to store the basic raw materials, and the container under the lid that matches the lid is filled with pure water or a basic solution for mixing with or dissolving the basic raw materials. When drinking, the storage space is opened through the switch mechanism set on the lid, and the basic raw materials are put into the container below. After being fully shaken, it can be directly drunk.

[0005] However, if the base solution is in the form of a dairy product, it will undergo an oxidation reaction under the action of oxygen or light to produce a small amount of gas. Currently, there is no bottle cap structure that can effectively discharge this part of the gas.

[0006] In view of this, the present utility model is proposed. Utility Model Content

[0007] The purpose of the utility model includes providing a bottle cap and a packaging bottle capable of venting air and relieving pressure, which can solve or improve the above-mentioned technical problems.

[0008] The utility model can be implemented like this:

[0009] In a first aspect, the utility model provides a bottle cap capable of venting air and releasing pressure, which comprises an upper cover, a middle cover, a lower cover and a cutter;

[0010] The upper cover comprises an upper cover body and a guide member arranged in the upper cover body;

[0011] A first sealing film is provided at the bottom of the middle cover for sealing the internal cavity of the middle cover, and the upper cover is provided on the top of the middle cover for screwing, and the upper cover, the middle cover and the first sealing film are surrounded to form a storage cavity for accommodating the basic raw materials;

[0012] The lower cover comprises a lower cover body, a second inner plug ring and a second sealing film which can be deformed under the action of tension, the lower cover body is a vertically arranged cylindrical structure with a top opening and a bottom opening, the second inner plug ring is arranged in the lower cover body, the top of the second inner plug ring is connected to the top of the lower cover body and the second inner plug ring extends along the top of the lower cover body toward the bottom of the lower cover body, an annular installation cavity for inserting the bottle mouth of the bottle body is formed between the outer wall of the second inner plug ring and the inner wall of the lower cover body, the second sealing film is connected to the bottom of the second inner plug ring for lifting the second sealing film when gas is generated in the bottle body, the second sealing film pulls the second inner plug ring to deform the annular installation cavity, and the deformed second inner plug ring and the bottle mouth form an exhaust channel for gas to flow out, the lower cover body is arranged in the middle cover and is located below the first sealing film;

[0013] A cutting portion and a notch portion are provided at the bottom of the cutter, and the cutter is provided with a clamping strip corresponding to the guide piece of the upper cover, the clamping strip abuts against the guide piece, and can move downward along the guide piece when the upper cover is screwed open to synchronously cut the first sealing film and the second sealing film; the length of the cutting portion is 1 / 2-4 / 5 of the circumference of the cutter.

[0014] In an optional embodiment, the middle cover includes a first middle cover portion and a second middle cover portion connected to each other, the first middle cover portion is used to connect with the upper cover, and the second middle cover portion is used to connect with the lower cover; the first middle cover portion has a cylindrical first inner cavity, the second middle cover portion has a cylindrical second inner cavity, the diameter of the second inner cavity is greater than the diameter of the first inner cavity, and the middle cover forms a stepped surface at the junction of the first inner cavity and the second inner cavity;

[0015] A first inner plug ring is arranged in the second inner cavity, and the first sealing film is used to seal the bottom of the first inner plug ring in the assembled state; in the assembled state, the top surface of the second sealing film is in contact with the bottom surface of the first sealing film, or there is a gap of no more than 3 mm between the top surface of the second sealing film and the bottom surface of the first sealing film.

[0016] In an optional embodiment, an inner wall boss protruding inward in a radial direction is provided near the bottom of the second inner plug ring, and a sealing mounting ring is formed between the lower surface of the inner wall boss and the inner wall of the second inner plug ring below the inner wall boss, and the second sealing membrane is sealed and connected to the sealing mounting ring.

[0017] In an optional embodiment, an outer wall boss protruding outward in a radial direction is provided near the bottom of the second inner plug ring, the outer wall boss is located in the annular mounting cavity, and is used to abut against and seal the inner surface of the bottle mouth.

[0018] In an optional embodiment, the thickness of the second sealing film is 20 μm-100 μm.

[0019] In an optional embodiment, the distance between the outer wall of the second inner plug ring and the inner wall of the lower cover body is 0.5 mm-2.5 mm.

[0020] In an optional embodiment, the thickness of the second inner plug ring is 0.5 mm-2 mm.

[0021] In an optional embodiment, the length of the second inner plug ring extending from the top of the lower cover body toward the bottom of the lower cover body is 0.1 mm-10 mm.

[0022] In an optional embodiment, after the bottle cap is unscrewed, the cutter extends downward by 0.5mm-5mm relative to the plane where the second sealing film was located before cutting, and / or, after the bottle cap is unscrewed, the first sealing film and the second sealing film are bent downward by 45°-90°.

[0023] In a second aspect, the utility model provides a packaging bottle, which includes the bottle cap as described above, the packaging bottle includes a bottle body and a bottle mouth portion located at the opening of the bottle body, and the bottle mouth portion is inserted into the annular mounting cavity of the bottle cap.

[0024] The beneficial effects of the utility model include:

[0025] The lower cover of the bottle cap capable of exhausting and relieving pressure provided by the utility model comprises a lower cover body, a second inner plug ring and a second sealing film, an annular installation cavity is formed between the outer wall of the second inner plug ring and the inner wall of the lower cover body, the annular installation cavity is deformed by pulling the second inner plug ring through the second sealing film, and the deformed second inner plug ring and the bottle mouth form an exhaust channel for gas to flow out, which can realize timely exhaust and pressure relief of excess gas in the bottle body, avoid the occurrence of increased bottle pressure, bottle expansion, etc., and realize automatic exhaust and pressure relief. At the same time, the upper cover and the middle cover are used to form a storage cavity, a first sealing film is set at the opening part of the storage cavity, and a second sealing film is set at the opening part of the lower cover. During the opening process, the first sealing film and the second sealing film can be synchronously cut by controlling the cutter to rotate downward, and the length of the cutting part is set to 1 / 2-4 / 5 of the circumference of the cutter, so that the basic raw materials in the storage cavity can be effectively and quantitatively dropped into the bottle body, and the basic raw materials and the liquid in the bottle body can be quantitatively mixed, ensuring that the mixed beverage has a good taste. The packaging bottle with the bottle cap capable of venting and relieving pressure has a simple structure, is safe to use, and can be industrially produced. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 An exploded view of the bottle cap capable of venting and relieving pressure provided by the utility model;

[0028] Figure 2 This is a finished assembly diagram of the bottle cap capable of venting and relieving pressure provided by the utility model;

[0029] Figure 3 A schematic diagram of the structure of the upper cover of the bottle cap capable of venting and relieving pressure provided by the utility model at a first viewing angle;

[0030] Figure 4 A cross-sectional view of the upper cover of the bottle cap capable of exhausting air and relieving pressure provided by the utility model;

[0031] Figure 5 A schematic diagram of the structure of the upper cover of the bottle cap capable of exhausting air and relieving pressure provided by the utility model at a second viewing angle;

[0032] Figure 6 A cross-sectional view of a middle cover in a bottle cover capable of venting and relieving pressure provided by the utility model;

[0033] Figure 7 A schematic diagram of the structure of the middle cover in the bottle cap capable of exhausting air and relieving pressure provided by the utility model;

[0034] Figure 8 A schematic diagram of the structure of the lower cover in the bottle cap capable of exhausting air and relieving pressure provided by the utility model;

[0035] Fig. 9 A schematic structural diagram of the lower cover of the bottle cap capable of venting air and relieving pressure provided by the utility model, in which the second sealing film is omitted;

[0036] Fig.10 A front view of the lower cover of the bottle cap capable of exhausting air and relieving pressure provided by the utility model;

[0037] Fig.11 A cross-sectional view of the lower cover of the bottle cap capable of venting and relieving pressure provided by the utility model when the internal and external air pressures are balanced;

[0038] Fig.12 A cross-sectional view of the lower cover of the bottle cap capable of exhausting and relieving pressure provided by the utility model when the second sealing film is lifted up and the exhaust channel is opened when the internal and external air pressures are unbalanced;

[0039] Fig.13 A cross-sectional view of a cutter in a bottle cap capable of venting and relieving pressure provided by the utility model;

[0040] Fig.14 A schematic diagram of the structure of a cutter in a bottle cap capable of exhausting air and relieving pressure provided by the utility model;

[0041] Fig.15 It is a schematic diagram of the bending structure of the first sealing film in the bottle cap capable of venting and relieving pressure provided by the utility model after being cut by a cutter.

[0042] Icon: 10-bottle cap;

[0043] 100-upper cover; 110-guide; 111-connecting edge; 112-arc edge; 113-vertical edge; 114-rotation stop; 114a-vertical short edge; 115-sealing ring; 116-inner thread of upper cover; 117-anti-theft ring of upper cover; 118-anti-theft positioning protrusion of upper cover; 119-first connection point;

[0044] 200-middle cover; 201-storage cavity; 202-first upper opening; 203-first lower opening; 210-first sealing film; 220-first middle cover portion; 221-protrusion; 230-second middle cover portion; 240-step surface; 241-sealing ring; 250-first inner plug ring;

[0045] 300-lower cover; 301-second upper opening; 302-second lower opening; 310-lower cover body; 311-annular mounting cavity; 312-exhaust channel; 313-lower cover positioning ridge; 314-lower cover inner thread; 315-outer seal; 316-top seal; 317-lower cover anti-theft ring; 318-second connection point; 319-anti-theft positioning protrusion;

[0046] 320 - second inner plug ring; 321 - outer wall boss; 322 - inner wall boss; 323 - sealing mounting ring;

[0047] 330-second sealing film;

[0048] 400 - cutter; 401 - cutting part; 402 - notch part; 410 - clamping strip; 430 - guide groove. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0050] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0051] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0052] In the description of the present utility model, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like appear, the directions or positional relationships indicated are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present utility model. In addition, if the terms "first", "second", "third" and the like appear, they are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0053] In addition, the terms "horizontal" and "vertical" do not mean that the components must be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0054] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0056] Example 1

[0057] Please refer to Figure 1 and Figure 2This embodiment provides a bottle cap 10 capable of venting air and relieving pressure, which includes an upper cover 100, a middle cover 200, a lower cover 300 and a cutter 400.

[0058] The upper cover 100 includes an upper cover body and a first guide assembly disposed in the upper cover body. In some embodiments, the upper cover body is a vertically arranged cylindrical structure with a sealed top and an open bottom, and the first guide assembly is connected to the inner side of the top of the upper cover body, and the first guide assembly is arranged in an arc shape along the direction from the top to the bottom of the upper cover 100.

[0059] Combination Figure 3 and Figure 4 The upper cover body is provided with a sealing ring 115, which is arranged on the upper surface of the upper cover body and extends downward from the upper surface of the upper cover body. The first guide assembly is located on the inner side of the sealing ring 115, which can also be understood as: the sealing ring 115 is arranged between the side wall of the upper cover body and the first guide assembly. When the upper cover 100 and the middle cover 200 are covered, the upper side wall of the middle cover 200 is located between the first guide assembly and the sealing ring 115, thereby ensuring good sealing between the upper cover 100 and the middle cover 200.

[0060] In addition, combined Figure 1 and Figure 5 The inner wall of the upper cover body is also provided with an upper cover internal thread 116, which is used to connect with the middle cover 200. The bottom of the upper cover body is provided with an upper cover anti-theft ring 117, and the inner wall of the upper cover anti-theft ring 117 is provided with a plurality of upper cover anti-theft positioning protrusions 118. During the production process of the upper cover 100, the top of the upper cover anti-theft ring 117 is connected to the bottom edge of the upper cover body through a plurality of first connection points 119. The upper cover anti-theft ring 117 and the upper cover body are integrally formed, and then an intermittent annular cutting knife is used to perform annular cutting, thereby forming a plurality of first connection points 119 at the connection position of the upper cover anti-theft ring 117 and the upper cover body. The setting of the plurality of first connection points 119 can ensure the connection between the upper cover anti-theft ring 117 and the upper cover body, and at the same time, it can also be used to judge whether the product is complete or has been opened.

[0061] The middle cover 200 is a cylindrical structure with a vertical top opening and a bottom opening. Figure 6 The opening at the top of the middle cover 200 is defined as the "first upper opening 202", and the opening at the bottom is defined as the "first lower opening 203". The upper cover 100 is screwed onto the top of the middle cover 200. For example, the upper cover 100 is connected to the first upper opening 202 by threads.

[0062] Reference Figure 7The bottom of the middle cover 200 is provided with a first sealing film 210 for sealing the internal cavity of the middle cover 200. The upper cover 100, the circumferential side wall of the middle cover 200 and the first sealing film 210 together enclose a storage cavity 201 for accommodating basic raw materials. The basic raw materials placed in the storage cavity 201 can be, but are not limited to, solid, semi-solid, liquid and other filling materials.

[0063] The diameter of the first lower opening 203 of the middle cover 200 is slightly larger than the outer diameter of the lower cover 300 , so that the lower cover 300 can be connected to the first lower opening 203 , and the top of the lower cover 300 is located inside the middle cover 200 .

[0064] In this embodiment, the middle cover 200 includes a first middle cover portion 220 and a second middle cover portion 230 connected to each other. The first middle cover portion 220 is used to connect with the upper cover 100, and the second middle cover portion 230 is used to connect with the lower cover 300. The first middle cover portion 220 has a cylindrical first inner cavity, and the second middle cover portion 230 has a cylindrical second inner cavity. The inner diameter of the second inner cavity is greater than the inner diameter of the first inner cavity, and a step surface 240 is formed at the junction of the first inner cavity and the second inner cavity.

[0065] The second inner cavity of the middle cover 200 is provided with a first inner plug ring 250, which extends from the step surface 240 to the second inner cavity, and is in communication with the first inner cavity. The first sealing film 210 seals the bottom of the first inner plug ring 250 (it can also be understood that the edge of the first sealing film 210 is connected to the end of the first inner plug ring 250 away from the step surface 240), so that the upper cover 100, the middle cover 200 and the first sealing film 210 are surrounded to form a storage cavity 201 for accommodating the basic raw materials. Specifically, the upper cover 100, the first inner cavity of the middle cover 200, the first inner plug ring 250 and the first sealing film 210 together form the storage cavity 201. In the initial state, the cutter 400 is located in the storage cavity 201.

[0066] In some embodiments, a sealing ring 241 is disposed on the inner wall of the middle cover 200 corresponding to the stepped surface 240, and the first inner plug ring 250 is located inside the middle cover 200 on the inner side of the sealing ring 241. The provision of the sealing ring 241 can improve the sealing performance after the bottle cap 10 is connected to the bottle body.

[0067] In this embodiment, the first sealing film 210 can be a multi-layer composite structure. There are many options for the first sealing film 210, including but not limited to polyethylene (PE), polyvinyl alcohol (PVOH), polypropylene (PP), polyvinyl ester (EVA), polyester (PET), aluminum foil, etc.

[0068] In some embodiments, the first sealing film 210 may include a PET outer layer, an Al middle layer, and a PE inner layer that are sequentially stacked and connected, and the connection between the PET outer layer, the Al middle layer, and the PE inner layer may be connected by conventional pressing technology, and the edge of the PE inner layer is connected to the bottom of the storage cavity 201. The thickness of the first sealing film 210 may be 20 μm-100 μm, such as 20 μm, 40 μm, 60 μm, 80 μm, or 100 μm.

[0069] By setting the first sealing film 210 to the above structure and material, it can be ensured that it has appropriate strength, and by screwing the upper cover 100, the cutter 400 can be easily moved downward to cut the first sealing film 210. However, it should be noted that in order to ensure drinking safety, it is necessary to ensure that after the cutter 400 cuts the first sealing film 210, part of the first sealing film 210 is still connected to the first inner plug ring 250.

[0070] For reference, taking the solid powder placed in the storage cavity 201 as an example, the particle size of the solid powder may not exceed 0.5 mm, so as to help avoid the situation where the powder is stuck during the downward rotation of the cutter 400. Furthermore, the filling amount of the solid powder in the storage cavity 201 should not be too much, so as to avoid excessive solid powder hindering the rotation of the cutter 400, making it difficult for the cutter 400 to cut the first sealing film 210 to a preset opening.

[0071] The setting of the first inner plug ring 250 can ensure that even if the overall volume of the middle cover 200 is small, the storage cavity 201 also has a large volume; when the outer diameter of the second inner plug ring 320 is slightly smaller than the inner diameter of the bottle mouth of the bottle body, after the bottle body and the bottle cap 10 are connected, the second inner plug ring 320 is just plugged into the bottle mouth, which can play a better sealing role.

[0072] In this embodiment, please combine Figures 8 to 12 The lower cover 300 includes a lower cover body 310, a second inner plug ring 320 and a second sealing film 330. The lower cover body 310 is a cylindrical structure with a vertically arranged top opening (defined as "second upper opening 301") and a bottom opening (defined as "second lower opening 302"). The diameter of the second upper opening 301 is slightly larger than the outer diameter of the first inner plug ring 250.

[0073] The second inner plug ring 320 is integrally formed with the lower cover body 310 and is arranged in the lower cover body 310. The second inner plug ring 320 extends along the top of the lower cover body 310 toward the bottom. The top of the second inner plug ring 320 is fixedly connected to the top of the lower cover body 310. An annular installation cavity 311 is formed between the outer wall of the second inner plug ring 320 and the inner wall of the lower cover body 310 for inserting a bottle mouth (not shown) of a bottle body (not shown). The second sealing film 330 is connected to the bottom of the second inner plug ring 320 for lifting the second sealing film 330 when gas is generated in the bottle body. The second sealing film 330 pulls the second inner plug ring 320 to deform the annular installation cavity 311. The deformed second inner plug ring 320 and the bottle mouth form an exhaust channel 312 (such as Fig.12 ).

[0074] In this embodiment, the lower cover body 310 is arranged in the middle cover 200 and is located below the first sealing film 210. When the lower cover 300 and the middle cover 200 are assembled, the top surface of the second sealing film 330 is in contact with the bottom surface of the first sealing film 210 or has a gap of no more than 3 mm, so that the first sealing film 210 and the second sealing film 330 can be cut at the same time.

[0075] In this embodiment, the second sealing film 330 is used to seal the opening surrounded by the second inner plug ring 320. When the second sealing film 330 is squeezed by the gas pressure in the bottle body, it will bulge upward. At this time, the second sealing film 330 can pull the second inner plug ring 320 to produce a slight movement to open the seal in the annular mounting cavity 311, thereby forming an exhaust channel 312 for the gas in the bottle body to be discharged, thereby achieving exhaust and pressure relief.

[0076] The structure of the lower cover body 310 is similar to that of a conventional bottle cap 10 , and the lower cover body 310 may also adopt the design of an existing conventional bottle cap 10 , as long as the bottle body can be connected and sealed.

[0077] For details in this embodiment, please refer to Figures 8 to 12 The outer wall of the lower cover body 310 is vertically provided with a plurality of lower cover positioning ridges 313 ; the arrangement of the lower cover positioning ridges 313 is convenient for increasing the friction force at the contact position between the consumer and the bottle cap 10 , thereby facilitating opening of the bottle cap 10 .

[0078] The inner wall of the lower cover body 310 is provided with a lower cover inner thread 314 (such as Fig.12); the lower cover inner thread 314 and the bottle mouth outer thread are threadedly connected, so that the bottle body and the bottle cap 10 can be well assembled, so as to seal the product stored in the bottle body. At the same time, when the lower cover body 310 is rotated upward along the lower cover inner thread 314, the lower cover body 310 can be separated from the bottle body to open the bottle mouth of the bottle body, and when the lower cover body 310 is rotated downward along the lower cover inner thread 314, the lower cover body 310 can be threadedly connected with the bottle body to close the bottle mouth of the bottle body, so as to seal the unfinished product in the bottle body again.

[0079] Please refer to Fig.11 and Fig.12 In order to enhance the sealing effect, in the present embodiment, an outer seal 315 for sealing the outer surface of the bottle mouth and a top seal 316 for sealing the top surface of the bottle mouth are provided on the inner side of the top of the lower cover body 310, and the top seal 316 is located between the outer seal 315 and the second inner plug ring 320; wherein, both the outer seal 315 and the top seal 316 are structures protruding downward from the inner side of the top of the lower cover body 310, and the protruding height of the top seal 316 is smaller than the protruding height of the outer seal 315. By providing the outer seal 315 and the top seal 316, the outer side and the top of the bottle mouth of the bottle body can be sealed, and the sealing effect is better.

[0080] The bottom of the lower cover body 310 is also provided with a lower cover anti-theft ring 317, which is located below the lower cover positioning convex ridge 313. In the production process of the lower cover 300, the top of the lower cover anti-theft ring 317 is connected to the bottom edge of the lower cover body 310 through a plurality of second connection points 318. The lower cover anti-theft ring 317 and the lower cover body 310 can be integrally formed, and then intermittently cut by a ring cutting knife, so as to form a plurality of second connection points 318 at the connection position of the lower cover anti-theft ring 317 and the lower cover body 310. The setting of the plurality of second connection points 318 can ensure the connection between the lower cover anti-theft ring 317 and the lower cover body 310, and at the same time, it can also be used to judge whether the product is complete or has been opened. Among them, the inner surface of the lower cover anti-theft ring 317 is provided with a plurality of anti-theft positioning protrusions 319 for clamping the bottle mouth. Correspondingly, a continuous anti-theft retaining ring is arranged below the outer thread of the bottle mouth, the anti-theft retaining ring protrudes from the outer surface of the bottle mouth, and a bottle mouth positioning groove is formed between the anti-theft retaining ring and the bottom protrusion of the bottle mouth, and the anti-theft positioning protrusion 319 is embedded in the bottle mouth positioning groove and can rotate in the bottle mouth positioning groove. When the lower cover 300 is rotated, the lower cover body 310 will move upward under the cooperation of the lower cover inner thread 314 and the bottle mouth outer thread, while the anti-theft positioning protrusion 319 can only rotate in the bottle mouth positioning groove, but cannot move up and down. When the rotation force is greater than the connection force of the lower cover body 310 and the lower cover anti-theft ring 317 of the multiple second connection points, the lower cover body 310 and the lower cover anti-theft ring 317 are separated, and the lower cover body 310 is opened, and the lower cover anti-theft ring 317 is retained in the bottle mouth positioning groove of the bottle body.

[0081] In this embodiment, the second inner plug ring 320 is used to seal the bottle mouth. At the same time, when the internal pressure is greater than the external pressure, it can be stretched and deformed by the second sealing film 330 to change the sealing state into a state where air can be exhausted and pressure released.

[0082] Specifically, combined Fig.11 and Fig.12 The sealing of the bottle mouth is achieved by using the outer wall boss 321, which is arranged near the bottom of the second inner plug ring 320 and protrudes outward along the radial direction of the second inner plug ring 320. The outer wall boss 321 is located in the annular mounting cavity 311 and is used to abut against and seal the inner surface of the bottle mouth. The outer wall boss 321 is an arc-shaped structure, and the bottle mouth can be squeezed when it contacts the outer wall boss 321, thereby enhancing the sealing effect on the inner side of the bottle mouth.

[0083] The connection between the second inner plug ring 320 and the second sealing film 330 is achieved by using the inner wall boss 322. The inner wall boss 322 is arranged near the bottom and protrudes inward along the radial direction of the second inner plug ring 320. The lower surface of the inner wall boss 322 and the inner wall of the second inner plug ring 320 located below the inner wall boss 322 form a sealing mounting ring 323, and the second sealing film 330 is sealed and connected to the sealing mounting ring 323. The setting of the inner wall boss 322 can provide space for the connection of the second sealing film 330, and can realize the hot-melt connection of the side edge and the top of the second sealing film 330, with better connection effect and connection strength, and can ensure that the second sealing film 330 is lifted up when the internal pressure is greater than the external pressure, thereby driving the movement of the second inner plug ring 320. In addition, the setting of the inner wall boss 322 can also provide a supporting force for the edge of the second sealing film 330 to avoid the edge of the second sealing film 330 from being broken.

[0084] In order to achieve the deformation of the second inner plug ring 320 by being pulled by the second sealing film 330, in this embodiment, the thickness of the second inner plug ring 320 can be limited to 0.5mm-2mm; the extension length of the second inner plug ring 320 is 0.1mm-10mm. In some embodiments, the thickness of the second inner plug ring 320 can be, for example, any one of 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2mm, or a range between any two of them. In some embodiments, the extension length of the second inner plug ring 320 can be, for example, 0.1 mm, 0.5 mm, 0.8 mm, 1 mm, 1.2 mm, 1.5 mm, 1.8 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm, 5 mm, 5.5 mm, 6 mm, 6.5 mm, 7 mm, 7.5 mm, 8 mm, 8.5 mm, 9 mm, 9.5 mm, 10 mm, or any one of the range values ​​​​among any two thereof.

[0085] Furthermore, the material of the second inner plug ring 320 can be HDPE, which is high-density polyethylene. It is an environmentally friendly material. The film has low permeability to water vapor and air and low water absorption, so it can be well sealed to the bottle mouth, and it is also convenient to be sealed and connected with the second sealing film 330. It has good hardness and tensile strength. It can be easily deformed under the action of external force (such as internal and external pressure) on the basis of ensuring sealing, and can be reset after the external force disappears. It should be understood that in this embodiment, when the second sealing film 330 bulges to pull the second inner plug ring 320, the change range of the second inner plug ring 320 is very small, and only a small gap needs to be formed to serve as the exhaust channel 312 for the excess gas in the bottle to be discharged.

[0086] The gap distance of the annular installation cavity 311 formed between the outer wall of the second inner plug ring 320 and the inner wall of the lower cover body 310 can be 0.5mm-2.5mm (that is, the distance between the outer wall of the second inner plug ring 320 and the inner wall of the lower cover body 310 is 0.5mm-2.5mm), and the size of the annular installation cavity 311 corresponds to the thickness of the bottle mouth part of the bottle body, so as to facilitate the insertion of the bottle mouth part into the annular installation cavity 311.

[0087] The second sealing film 330 in this embodiment is a thin film structure, which can be pushed up and bulge when the internal pressure is greater than the external pressure, that is, the second sealing film 330 changes from a flat structure to an arc structure, presenting a structure with low sides and high middle. Since the edge of the second sealing film 330 is sealed with the sealing mounting ring 323 of the second inner plug ring 320, during the process of the second sealing film 330 being pushed up, it can cause the second inner plug ring 320 to slightly deform (such as Fig.12 As shown in the figure, the annular mounting cavity 311 opens a gap to form an exhaust channel 312, and the excess gas in the bottle body can be discharged from the exhaust channel 312 to achieve the purpose of exhaust and pressure relief.

[0088] It should be understood that the installation position of the second sealing film 330 in this embodiment should be as close as possible to the bottom of the second inner plug ring 320, so that it is convenient for the second sealing film 330 to pull the second inner plug ring 320. If the second sealing film 330 is set at the top or middle of the second inner plug ring 320, it is difficult to pull the second inner plug ring 320 to deform it, and it is difficult to open the annular installation cavity 311 to form the exhaust channel 312 for exhaust pressure relief.

[0089] For reference, the film structure of the above-mentioned second sealing film 330 can also be a multi-layer composite structure. There are many choices for the second sealing film 330. For example, the material of the second sealing film 330 of conventional dairy products such as milk or yogurt includes but is not limited to polyethylene (PE), polyvinyl alcohol (PVOH), polypropylene (PP), polyvinyl ester (EVA), polyester (PET), aluminum foil, etc.

[0090] Specifically, the second sealing film 330 in this embodiment includes a PET outer layer, an Al middle layer and a PE inner layer which are overlapped and connected in sequence. The connection between the PET outer layer, the Al middle layer and the PE inner layer can be connected by conventional pressing technology, and the edge of the PE inner layer is hot-melt sealed with the sealing mounting ring 323. In this embodiment, through the form of multi-layer film composite, the second sealing film 330 can be made strong and not easy to be damaged. At the same time, the thickness of the second sealing film 330 is limited to 20μm-100μm, so that it has good flexibility and can be deformed under the pressure of excess gas in the bottle body and drive the second inner plug ring 320 to deform.

[0091] In other embodiments, the second sealing film 330 may further include an Al layer and an adhesive layer coated on the Al layer, and the edge of the adhesive layer is connected to the sealing mounting ring 323 by hot-melt sealing.

[0092] That is, in this embodiment, there are many choices of material or structure for the second sealing film 330 , as long as it can be deformed and bulged under a certain air pressure and has a certain strength to pull the second inner plug ring 320 .

[0093] Please combine Figures 13 to 15 In this embodiment, the cutter 400 is a cylindrical structure with an opening at the top and an opening at the bottom, and the cutter 400 is provided with a first matching component that matches with the first guide component. In the initial state, the cutter 400 is located in the storage cavity 201.

[0094] Please combine Figure 3 and Fig.13 The first guide assembly includes a plurality of guide members 110 distributed in a circular array, each guide member 110 is vertically arranged, and each guide member 110 includes a connecting edge 111 and an arcuate edge 112 (such as Figure 3 The connecting edge 111 is connected to the inner top wall of the upper cover 100 , and one end of the connecting edge 111 is connected to the arc-shaped edge 112 .

[0095] The first mating component includes the same number of clip strips 410 as the guide member 110 (eg Fig.14 ), that is, the cutter 400 is provided with a clamping strip 410 corresponding to the guide member 110 of the upper cover 100. Each clamping strip 410 is vertically arranged on the inner wall of the cutter 400 and extends to the top of the cutter 400, and all the clamping strips 410 are distributed in a circular array on the inner wall of the cutter 400.

[0096] In the initial condition, the cutter 400 is sleeved outside the first guide assembly, and each clip 410 is located between two adjacent guide members 110. The upper cover 100 is screwed, and the guide members 110 rotate, so that each clip 410 moves along the arc edge 112, thereby driving the cutter 400 to rotate and move downward.

[0097] Each guide member 110 also has a vertical edge 113 (such as Figure 3 ), the vertical edge 113 is connected to the end of the connecting edge 111 away from the arc edge 112. The interval between two adjacent guide members 110 matches the size of the clamping strip 410 (e.g., the interval between two adjacent guide members 110 is the same as the size of the clamping strip 410). When the upper cover 100, the cutter 400 and the middle cover 200 are just assembled together and not screwed, the clamping strip 410 is just in contact with the vertical edge 113. After the upper cover 100 is screwed, the clamping strip 410 is separated from the vertical edge 113 and moves along the track of the arc edge 112.

[0098] In some embodiments, it can also be understood that: the guide member 110 is triangular in shape, wherein the first side (connecting side 111) is connected to the top inner wall of the upper cover body in an arc shape, the second side (vertical side 113) is perpendicular to the top inner wall of the upper cover body and extends in a direction away from the top of the upper cover body, and the third side (arc side 112) is smoothly connected from the first side to the top of the second side in an arc shape, and the cutter 400 moves along the third side, that is, the third side guides the cutter 400.

[0099] Furthermore, each guide member 110 may also have a rotation stop portion 114 (eg Figure 3 ), the stopper 114 is disposed at one end of the arc-shaped edge 112 away from the connecting edge 111, and the side of the stopper 114 close to the arc-shaped edge 112 can be, for example, a vertical short side 114a.

[0100] When the clamping strip 410 moves along the arc edge 112, it will be blocked by the vertical short side 114a at the end of the arc edge 112 to prevent it from moving further, thereby playing a role of stopping rotation, and can effectively prevent the cutter 400 from excessively rotating and causing the first sealing film 210 and the second sealing film 330 to be completely cut.

[0101] In this embodiment, please refer to Figures 13 to 15 The bottom end of the cutter 400 has a cutting portion 401 and a notch portion 402 connected end to end. For example, the length of the cutting portion 401 may account for 1 / 2-4 / 5 of the circumference of the cutter 400, and the cutting portion 401 has a plurality of cutting teeth. It can be understood that the notch portion 402 is formed in the area where the cutting teeth are not provided in the circumferential direction of the bottom end of the cutter 400, so that after the cutting teeth cut the first sealing film 210 and the second sealing film 330 in a circle along the circumferential direction, the first sealing film 210 and the second sealing film 330 both have some uncut positions, so that the first sealing film 210 and the second sealing film 330 will not fall into the bottle body after being opened.

[0102] By screwing the upper cover 100, the first guide assembly cooperates with the first matching assembly to drive the cutter 400 to rotate downward, and the cutting part 401 of the cutter 400 successively cuts the first sealing film 210 and the second sealing film 330, and the part of the first sealing film 210 corresponding to the notch part 402 is still connected to the bottom of the storage cavity 201, and the part of the second sealing film 330 corresponding to the notch is still connected to the lower cover 300, which effectively prevents the first sealing film 210 and the second sealing film 330 from falling into the bottle body. Continue to screw the upper cover 100, and the cutter 400 extends downward relative to the plane where the second sealing film 330 is located before cutting (the extension length can be, for example, 0.5mm-5mm). Under the above extension length, the first sealing film 210 and the second sealing film 330 can be pushed to bend downward and the bending angle can be controlled to be 45° to 90°. It should be noted that the above "bending angle" refers to the angle between the plane where the sealing film is located after bending and the plane where the sealing film is located when it is not cut.

[0103] The above arrangement can effectively and quantitatively allow the basic raw materials in the storage cavity 201 to fall into the bottle body, thereby achieving quantitative mixing of the basic raw materials and the liquid in the bottle body, and ensuring that the mixed beverage has a good taste.

[0104] As mentioned above, the bottle cap 10 provided in this embodiment, the cutting part 401 and the notch part 402 set at the bottom end of the cutter 400, in combination with the first sealing film 210 inside the middle cover 200, the second sealing film 330 of the lower cover 300 and other structures, and the scheme that the cutter 400 extends downward by 0.5mm-5mm, can realize that during the opening process of the bottle cap 10, the cutter 400 successively cuts the first sealing film 210 and the second sealing film 330, and pushes down the first sealing film 210 and the second sealing film 330 so that the first sealing film 210 and the second sealing film 330 are bent at a suitable angle, so that the basic raw material (such as solid powder) contained in the storage cavity 201 can be smoothly discharged from the second lower opening 302. When the bottle cap 10 is covered on the bottle body, the above-mentioned basic raw material (such as solid powder) can be smoothly discharged into the bottle body from the second lower opening 302 and mixed with the liquid contained in the bottle body, which can improve or solve the situation that the second sealing film 330 blocks the solid powder from being discharged downward.

[0105] In this embodiment, a second guide component is further provided on the side wall of the middle cover 200 corresponding to the storage cavity 201, and a second matching component matching with the second guide component is provided on the outer wall of the cutter 400.

[0106] Please combine Figure 6 and Fig.14 The second guide component includes a plurality of protrusions 221 arranged on the side wall of the middle cover 200 corresponding to the storage cavity 201, and the second matching component includes a plurality of guide grooves 430 arranged on the outer wall of the cutter 400.

[0107] The upper cover 100 is screwed, and each guide groove 430 moves until the corresponding protrusion 221 is located in the guide groove 430 . Each guide groove 430 is stuck outside the corresponding protrusion 221 to move the cutter 400 along the extension direction of the guide groove 430 .

[0108] In other embodiments of the present invention, the second guide assembly includes a plurality of guide grooves 430 disposed on the side wall of the middle cover 200 corresponding to the storage cavity 201, and the second matching assembly includes a plurality of protrusions 221 disposed on the outer wall of the cutter 400. When the upper cover 100 is screwed, each protrusion 221 moves into the corresponding guide groove 430 and moves along the extension direction of the guide groove 430.

[0109] As mentioned above, the working principle of the bottle cap 10 provided in this embodiment includes:

[0110] When the bottle cap 10 is connected to the bottle body, the outer thread of the bottle mouth of the bottle body cooperates with the inner thread 314 of the lower cover 300 to achieve a sealed connection. When in use, the upper cover 100 is screwed open, and the clamping strip 410 moves downward along the guide 110 to synchronously cut the first sealing film 210 and the second sealing film 330. At this time, the storage cavity 201 is opened, and the basic raw material leaks from the storage cavity 201 into the bottle body, completing the opening.

[0111] The lower cover 300 utilizes the gap between the second inner plug ring 320 and the inner wall of the lower cover body 310 to form an annular installation cavity 311, and the bottle mouth of the bottle body is inserted into the annular installation cavity 311 to achieve installation and sealing, and the second sealing film 330 connected to the bottom of the second inner plug ring 320 can be lifted up when gas is generated in the bottle body. The deformation of the second sealing film 330 will pull the second inner plug ring 320 to move slightly, thereby opening the seal in the annular installation cavity 311 to form an exhaust channel 312 for the gas in the bottle body to be discharged, thereby achieving exhaust and pressure relief. The bottle cap 10 provided in this embodiment has a simple structure. It only needs to set a second sealing film 330 that can undergo a certain deformation when the air pressure in the bottle body is greater than the external air pressure. By using the second sealing film 330 to pull the second inner plug ring 320, the excess gas in the bottle body can be exhausted and pressure relieved in time, which effectively avoids the increase of bottle body pressure and bottle body expansion, thereby improving the safety of the packaging bottle. In addition, the bottle cap 10 provided by the utility model can realize automatic exhaust and pressure relief without manual operation, and its structure is simple, which can realize industrial production.

[0112] In addition, the second sealing film 330 can be made of a variety of materials and has a wide range of uses. The double-layer film can be used to seal the product, which can achieve the effect of separating wet and dry, ensure that the taste and efficacy of the product are maintained during the shelf life, and smoothly add sensitive substances, effectively extend the shelf life of the product, and ensure the good quality of the product.

[0113] Example 2

[0114] This embodiment provides a packaging bottle, which includes the bottle cap 10 provided in Embodiment 1. In addition, the packaging bottle also includes a bottle body and a bottle mouth located at the opening of the bottle body, and the bottle mouth is inserted into the annular installation cavity 311 of the bottle cap 10.

[0115] Since the structure of the bottle body in this embodiment is substantially the same as that of the existing bottle body, the bottle mouth portion is also substantially the same as that of the existing bottle body. Specifically, the bottle mouth portion is provided with a bottle mouth external thread, which can be matched with the lower cover internal thread 314 on the inner wall of the lower cover body 310 (please refer to Fig.11 and Fig.12 ,) to realize the threaded connection between the lower cover body 310 and the bottle mouth, and also to facilitate the lower cover body 310 to be opened or closed when it is rotated along the lower cover inner thread 314.

[0116] Please refer to Fig.11 and Fig.12 Correspondingly, the bottle mouth is also provided with an anti-theft retaining ring and a bottom protrusion, and a bottle mouth positioning groove is formed between the anti-theft retaining ring and the bottom protrusion, and the bottle mouth positioning groove is used to accommodate the lower cover anti-theft ring 317, so that the lower cover anti-theft ring 317 can rotate in the bottle mouth positioning groove but cannot move up and down. When the rotational force is greater than the connection force of the multiple second connection points 318 between the lower cover body 310 and the lower cover anti-theft ring 317, the lower cover body 310 is separated from the lower cover anti-theft ring 317, thereby opening the lower cover body 310, and the lower cover anti-theft ring 317 remains in the bottle mouth positioning groove of the bottle body.

[0117] This embodiment is based on the conventional bottle structure, and uses the bottle cap 10 in Example 1 as the sealing structure of the bottle body. It can not only achieve the basic sealing effect, but also achieve the functions of storage and exhaust pressure relief (no air leakage and pressure relief under 30PSI conditions, automatic air leakage and pressure relief under 80PSI conditions). It can achieve the effect of dry-wet separation, ensure that the taste and efficacy of the product are still maintained during the shelf life, realize the smooth addition of sensitive substances, effectively extend the shelf life of the product, and ensure the good quality of the product. The packaging bottle in this embodiment is particularly suitable for packaging carbonated beverages or carbonated beverages, and of course it is also suitable for packaging other conventional beverages or conventional foods.

[0118] It should be understood that in this embodiment, a protective cover (not shown) can also be provided on the upper part of the bottle cap 10. The provision of the protective cover can prevent the second sealing film 330 from being broken by impact of sharp foreign objects during transportation or storage of the packaging bottle, thereby improving the overall safety of the packaging bottle.

[0119] During production, the upper cover 100 and the middle cover 200 can be assembled on one production line, that is, the basic raw materials are placed in the storage cavity 201, and the upper cover 100 and the middle cover 200 are assembled; the lower cover 300 and the bottle body are assembled on one production line, the liquid material is filled into the bottle body, and the bottle body is sealed by the lower cover 300. After the products of the two production lines are filled and assembled, the first lower opening 203 of the middle cover 200 is covered on the lower cover 300 to complete the aseptic production of the entire beverage product.

[0120] The above are only specific implementations of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A bottle cap capable of venting and relieving air and pressure, characterized in that: It includes an upper cover, a middle cover, a lower cover and a cutter; The upper cover comprises an upper cover body and a guide member arranged in the upper cover body; The bottom of the middle cover is provided with a first sealing film for sealing the internal cavity of the middle cover, the upper cover is used for screwing and is arranged on the top of the middle cover, and the upper cover, the middle cover and the first sealing film are surrounded to form a storage cavity for accommodating the basic raw materials; The lower cover comprises a lower cover body, a second inner plug ring and a second sealing film which can be deformed under the action of tension, the lower cover body is a vertically arranged cylindrical structure with a top opening and a bottom opening, the second inner plug ring is arranged in the lower cover body, the top of the second inner plug ring is connected to the top of the lower cover body and the second inner plug ring extends along the top of the lower cover body toward the bottom of the lower cover body, an annular installation cavity for inserting the bottle mouth of the bottle body is formed between the outer wall of the second inner plug ring and the inner wall of the lower cover body, the second sealing film is connected to the bottom of the second inner plug ring for lifting the second sealing film when gas is generated in the bottle body, the second sealing film pulls the second inner plug ring to deform the annular installation cavity, the deformed second inner plug ring and the bottle mouth form an exhaust channel for gas to flow out, the lower cover body is arranged in the middle cover and is located below the first sealing film; A cutting portion and a notch portion are provided at the bottom of the cutter, and the cutter is provided with a clamping strip corresponding to the guide piece of the upper cover, the clamping strip abuts against the guide piece, and can move downward along the guide piece when the upper cover is screwed open to synchronously cut the first sealing film and the second sealing film; the length of the cutting portion is 1 / 2-4 / 5 of the circumference of the cutter.

2. The bottle cap according to claim 1, characterized in that: The middle cover comprises a first middle cover portion and a second middle cover portion connected to each other, the first middle cover portion is used to connect with the upper cover, and the second middle cover portion is used to connect with the lower cover; the first middle cover portion has a cylindrical first inner cavity, the second middle cover portion has a cylindrical second inner cavity, the diameter of the second inner cavity is greater than the diameter of the first inner cavity, and the middle cover forms a stepped surface at the junction of the first inner cavity and the second inner cavity; A first inner plug ring is provided in the second inner cavity, and the first sealing film is used to seal the bottom of the first inner plug ring in the assembled state; in the assembled state, the top surface of the second sealing film is in contact with the bottom surface of the first sealing film, or there is a gap of no more than 3 mm between the top surface of the second sealing film and the bottom surface of the first sealing film.

3. The bottle cap according to claim 1, characterized in that: The second inner plug ring is provided with an inner wall boss protruding inwardly in the radial direction near the bottom, and a sealing mounting ring is formed between the lower surface of the inner wall boss and the inner wall of the second inner plug ring located below the inner wall boss, and the second sealing film is sealingly connected to the sealing mounting ring.

4. The bottle cap according to claim 1, characterized in that: The second inner plug ring is provided with an outer wall boss protruding outward in the radial direction near the bottom. The outer wall boss is located in the annular mounting cavity and is used to abut against and seal the inner surface of the bottle mouth.

5. The bottle cap according to any one of claims 1 to 4, characterized in that: The thickness of the second sealing film is 20 μm-100 μm.

6. The bottle cap according to any one of claims 1 to 4, characterized in that: The distance between the outer wall of the second inner plug ring and the inner wall of the lower cover body is 0.5mm-2.5mm.

7. The bottle cap according to any one of claims 1 to 4, characterized in that: The thickness of the second inner plug ring is 0.5 mm-2 mm.

8. The bottle cap according to any one of claims 1 to 4, characterized in that: The second inner plug ring extends along the top of the lower cover body toward the bottom of the lower cover body by a length of 0.1 mm to 10 mm.

9. The bottle cap according to any one of claims 1 to 4, characterized in that: After the bottle cap is unscrewed, the cutter extends downward by 0.5mm-5mm relative to the plane where the second sealing film is located before cutting, and / or, after the bottle cap is unscrewed, the first sealing film and the second sealing film are bent downward by 45°-90°.

10. A packaging bottle, characterized in that: It comprises the bottle cap according to any one of claims 1 to 9, wherein the packaging bottle comprises a bottle body and a bottle mouth portion located at the opening of the bottle body, and the bottle mouth portion is inserted into the annular mounting cavity of the bottle cap.

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