Structure for holding flap of bottle cap and bottle

Abstract

A structure for holding a flap (3) of a bottle cap and a bottle. By setting the length and the position of an inner side notch (111) and the length and the position of an outer side notch (121), when the flap (3) is turned over by 180 degrees, a contact portion exists between a bottle cap base (2) and the flap (3); a pulling force of a connecting band (4) elastically deforms the contact portion, or the connecting band (4) is stretched to be elastically deformed, and after the flap (3) is turned over by more than 180 degrees, the contact portion or the connecting band (4) rebounds, such that the flap (3) is in a stressed and holding state, and it can be ensured that the flap (3) is kept in an open state, thereby avoiding the situation where the flap (3) comes into contact with the mouth or the nose of a user during drinking, thus affecting the drinking. The structure has the characteristics of being convenient to use and convenient to open. In addition, the structure of the bottle cap is also simplified, and molding and production difficulties are further reduced.

Description

Flip-top retaining structure for bottle cap and bottle Technical Field

[0001] The present application relates to a packaging container, in particular to a flip-top retaining structure for a bottle cap and a bottle. Background Art

[0002] Nowadays, when the flip cover is opened and used, due to the influence of the design structure of the flip cover itself, the flip cover is easy to flip back relative to the bottle or the bottle cap seat and touch the user's mouth or nose. In addition, it is also easy for the flip cover to cover the liquid outlet of the bottle or the bottle cap seat again. At this time, if the user needs to drink, the flip cover needs to be flipped open again, which is inconvenient to use.

[0003] For example: There are currently three structures of flip-top bottle caps. The first is a circumferential tear line on the bottle cap. After the bottle cap is opened, the opening of the tear line will not break, forming a connecting band connecting the bottle cap base and the flip cap. The width of this connecting band is relatively small, generally only 1-2 mm, and the opening angle of the flip cap is generally less than 180 degrees. If it reaches more than 180 degrees, the connecting band is likely to break, which will cause the flip cap to touch the mouth or nose when drinking.

[0004] The second method is to set a circumferential tear line and a short tear line, and set a pair of two axial cuts between the tear line and the short tear line. After the tear line and the short tear line are broken, a connecting belt is formed between the cuts. The length of this connecting belt is relatively long and can be flipped more than 180 degrees, but the connecting belt has a certain elasticity and is kept in a position above 180 degrees. When drinking, one hand is required to press the flip cover, which is more inconvenient to use.

[0005] The third method is to set a circumferential tear line and a short tear line, and set two pairs of axial cuts between the tear line and the short tear line. After the tear line and the short tear line are broken, two connecting belts are formed between the cuts. There is a certain distance between the two connecting belts. After the flip cover is opened, the contact part between the bottle cap seat and the flip cover between the two connecting belts is squeezed and deformed. The flip cover can be maintained at a position of more than 180 degrees. However, when the flip cover is returned to the bottle mouth, the edges of the flip cover and the cover seat will be misaligned and interfered by the tension of the two connecting belts. In addition, due to the bottle stopper structure on the flip cover, it is not convenient to return the flip cover to the bottle mouth, and the convenience of use is also poor.

[0006] In addition, some flip-top bottle caps are usually composed of a bottle cap base and a flip cover. The flip cover and the bottle cap base are connected by a flexible connecting belt. The connecting belt structure generally has two types: one is to provide a crease structure in the middle of the connecting belt. When the flip cover is closed, the connecting belt folds along the crease structure. For bottle caps with this type of connecting belt, due to the structural problems of the structure itself, the maximum opening angle of the flip cover is generally around 135°-150°. Therefore, when users use products with this type of bottle cap, the bottle cap often rubs against the user's face. The other is a crease-free structure. When the flip cover is closed, the connecting belt is in a "U" shape. When the flip cover is opened, the connecting belt will be straightened (or nearly straightened). However, before the product is sold, the flip cover is in the closed state for a long time, which will cause a certain permanent deformation of the connecting belt. Therefore, the connecting belt will have a certain resilience, which will cause the flip cover to rebound, directly affecting the user's experience, such as the flip cover rebounding and hitting the user's face.

[0007] Therefore, this application is studied and proposed in response to the above problems. Application Contents

[0008] The purpose of this application is to overcome the shortcomings of the existing technology and provide a flip cover holding structure for a bottle cap, which can ensure that the flip cover remains in an open state, avoiding the flip cover touching the user's mouth or nose during drinking and affecting drinking. It has the characteristics of easy use, simple structure, easy opening and easy cover replacement.

[0009] This application is achieved through the following technical solutions:

[0010] The present application provides a flip-top holding structure for a bottle cap, comprising an integrally formed cap body, the cap body being provided with a long tear line and a short tear line along a circumferential direction, inner cuts along the axial direction of the cap body being provided at both ends of the long tear line, and outer cuts along the axial direction of the cap body being provided at both ends of the short tear line, after the long tear line and the short tear line are broken, the upper parts of the long tear line and the short tear line constitute the flip cap, the lower parts constitute the bottle cap seat, the portion between the inner cut and the outer cut constitutes the connecting belt, when the flip cap is flipped 180 degrees, a contact portion exists between the bottle cap seat and the flip cap, the tension of the connecting belt causes the contact portion to produce elastic deformation, or the connecting belt is stretched to produce elastic deformation; when the flip cap is flipped over 180 degrees, the contact portion or the connecting belt rebounds, so that the flip cap is in a force-retaining state.

[0011] The present application also provides a flip-top retaining structure for a bottle cap, comprising an integrally formed cap body, the cap body being provided with an open connecting tear line, the cap body being further provided with a folding indentation along a circumferential direction, the two ends of the folding indentation being connected to the two ends of the connecting tear line, after the connecting tear line breaks, the upper portion of the connecting tear line constitutes a flip-top, the lower portion constitutes a bottle cap seat, and the folding indentation portion forms a connecting band connecting the flip-top and the bottle cap seat; when the flip-top is flipped over 180 degrees along the folding indentation, the portions on both sides of the connecting band are stretched to generate an inward pulling force, which squeezes the contact portion between the flip-top and the bottle cap seat to generate an elastic deformation of more than 0.5 mm, and at the same time causes the middle portion of the connecting band to arch upward to generate outward tension, so that the flip-top remains in an open state.

[0012] The present application also provides a flip-top retaining structure for a bottle cap, comprising an integrally formed cap body, the cap body being provided with an open connecting tear line, the cap body being further provided with a folding indentation along a circumferential direction, two axial fracture portions being respectively provided between the two ends of the folding indentation and the two ends of the connecting tear line; after the connecting tear line is broken, the upper portion of the connecting tear line constitutes the flip cap, the lower portion constitutes the bottle cap seat, the portion between the two fracture portions forms a bottle cap band connecting the flip cap and the bottle cap seat, and the folding indentation portion forms a connecting band connecting the flip cap and the bottle cap seat; when the flip cap is flipped over 180 degrees or more, the bottle cap band is stretched to generate an inward pulling force, which squeezes the contact portion between the flip cap and the bottle cap seat to generate an elastic deformation of more than 0.5 mm, and at the same time causes the connecting band to arch upward to generate outward tension, so that the flip cap remains in an open state.

[0013] The middle portion of the long tear line has a bent portion bent downward, so that the lower end edge of the flip cover forms a plate protruding downward.

[0014] A folding groove is provided between the upper end of the plate and the flip cover, and the cross section of the folding groove is V-shaped.

[0015] A sealing plug is provided on the inner side of the top of the flip cover. A relief slope is provided on the portion of the sealing plug corresponding to the plate. A downwardly protruding guide portion is provided on the portion of the sealing plug away from the plate. A sealing ring is provided on the outer surface of the sealing plug.

[0016] The short tear line is located on the top surface of the cover body, and / or the upper end of the connecting strip extends to the top surface of the flip cover.

[0017] The diameter of the flip cover is smaller than that of the bottle cap seat. The long tear line is formed by the thin-walled portion between the bottle cap seat and the flip cover; the short tear line is formed by the thin-walled portion between the bottle cap seat and the flip cover.

[0018] A downwardly protruding guide portion is provided on one side of the sealing plug close to the folding indentation.

[0019] The connecting belt consists of a connecting lower belt body and a connecting upper belt body, the lower end of the connecting lower belt body is connected to the bottle cap seat, the upper end of the connecting upper belt body is connected to the flip cover, and the folding indentation is located at the connection between the connecting lower belt body and the connecting upper belt body.

[0020] The diameter of the flip cover is smaller than the diameter of the bottle cap seat, and the folding indentation is a thin-walled portion between the bottle cap seat and the flip cover.

[0021] The present application also provides a bottle using the flip-top retaining structure of the bottle cap described above, comprising a bottle body, the bottle mouth of the bottle body being provided with external threads, and a support block being provided on the inner side of the plate, such that when the bottle body is assembled to the bottle mouth, the lower surface of the support block abuts against the upper surface of the external threads. The support block is entirely or partially located below the folding groove.

[0022] The present application also provides a bottle adopting the flip-top retaining structure of the bottle cap as described above, comprising a bottle body, the bottle mouth of the bottle body is provided with an external thread, the lower part of the external thread is provided with an upper convex ring and a lower convex ring, and a limiting groove is formed between the upper convex ring and the lower convex ring; the lower inner wall of the cover body is provided with a limiting block placed on the inner side of the limiting groove when the cover body is assembled to the bottle mouth; when the cover body is rotated forward so that the limiting block is blocked by the lower convex ring, the top inner side of the flip-top blocks the bottle mouth; when the cover body is rotated backward so that the limiting block is blocked by the upper convex ring, the top inner side of the flip-top is separated from the upper end wall of the bottle mouth to form a pressure relief gap.

[0023] A sealing plug is provided on the inner side of the top of the flip cover; when the cover body is rotated forward so that the limit block is blocked by the lower convex ring, the sealing plug is fully inserted into the bottle mouth to form a seal; when the cover body is rotated backward so that the limit block is blocked by the upper convex ring, the sealing plug is partially separated from the bottle mouth, so that a pressure relief gap is formed between the sealing plug and the bottle mouth.

[0024] The present application also provides a flip-top retaining structure for a bottle cap, comprising a bottle cap seat and a flip-top, wherein a symmetrical connecting belt is provided between the bottle cap seat and the flip-top, and the bottle cap seat is provided with an upwardly protruding vertical piece portion located between the connecting belt, and an elastic piece portion is provided on the vertical piece portion. When the bottle cap seat is screwed onto the bottle, the elastic piece portion fits tightly against the bottle mouth.

[0025] The flip cover is provided with a paddle portion corresponding to the elastic piece portion. During the flipping process of the flip cover, the paddle portions push the elastic piece portions against each other, thereby generating a sound.

[0026] When the flip cover is closed, the paddle portion is located above the elastic portion, and the edge of the paddle portion is flush with the outer side wall of the elastic portion, or the edge of the paddle portion exceeds the outer side wall of the elastic portion.

[0027] The present application also provides a flip-top retaining structure for a bottle cap, comprising a bottle cap seat and a flip-top, wherein the bottle cap seat and the flip-top are connected via a connecting belt, wherein the connecting belt is provided with a crease group consisting of at least two creases, so that the connecting belt forms at least a three-section structure, with bottle cap belts on both sides of the connecting belt, and the two ends of the bottle cap belt are respectively connected to the bottle cap seat and the flip-top, and when the flip-top is opened, the connecting belt is folded along the crease group, and the flip-top is pulled by the bottle cap belt to fix the flip-top.

[0028] The fold group consists of a first fold close to the flip cover and a second fold close to the bottle cap seat. The first fold and the second fold separate the connecting belt into an upper connecting belt body connected to the flip cover, a lower connecting belt body connected to the bottle cap seat, and a middle connecting belt body located between the first fold and the second fold.

[0029] The thickness of the upper connecting belt gradually decreases from the flip cover to the first fold; and / or the thickness of the lower connecting belt gradually decreases from the bottle cap seat to the second fold; and / or the thickness of the middle connecting belt gradually increases from the first fold and the second fold on both sides to the middle.

[0030] The connection point between the connecting belt and the flip cover is located at the upper end, middle end or lower end of the flip cover; and / or the connection point between the connecting belt and the bottle cap seat is located at the upper end, middle end or lower end of the bottle cap seat.

[0031] The bottle cap belt and the connecting belt are an integrated structure; and / or the bottle cap belt and the connecting belt are separate structures, and a gap groove is provided between the bottle cap belt and the connecting belt.

[0032] The connecting belt and / or the bottle cap belt are of a curved structure.

[0033] Compared with the prior art, this application has the following advantages:

[0034] 1. The present application sets the length and position of the inner and outer incisions so that when the flip cover is flipped 180 degrees, there is a contact portion between the bottle cap seat and the flip cover. The tension of the connecting belt causes the contact portion to produce elastic deformation, or the connecting belt is stretched to produce elastic deformation. When the flip cover is flipped more than 180 degrees, the contact portion or the connecting belt rebounds, so that the flip cover is in a force-retained state, which can ensure that the flip cover remains in an open state, avoiding the flip cover touching the user's mouth or nose during drinking and affecting drinking. It is easy to use and easy to open. In addition, it simplifies the structure of the bottle cap and further reduces the difficulty of mold and production.

[0035] 2. A folding groove is provided between the upper end of the plate of the present application and the flip cover, and a support block is provided on the inner side of the plate. When the cover body is assembled to the bottle mouth, the lower surface of the support block rests on the upper surface of the external thread of the bottle mouth. When opening, the plate bends along the folding groove and the support block rotates on the upper surface of the external thread. Based on the principle of leverage, an upward force is applied to the flip cover, causing the long tear line to partially break, and then only a small force is required to break the long tear line completely, making it easy to open.

[0036] 3. The folding indentation of the present application will not break after the flip cover is opened. During the process of returning the flip cover to the bottle mouth, it will not be interfered by the edge misalignment of the flip cover and the bottle cover seat. While achieving the open state of the flip cover, it also solves the problem of interference when returning the cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The specific embodiments of the present application are further described in detail below with reference to the accompanying drawings, wherein:

[0038] Figure 1 is a schematic diagram of the structure of one of Example 1 of the present application;

[0039] Figure 2 is a schematic diagram of the structure of Example 1 of the present application;

[0040] Figure 3 is a schematic structural diagram of the flip cover shown in Figure 1 when it is opened 180 degrees;

[0041] Figure 4 is a schematic structural diagram of the flip cover shown in Figure 1 after opening more than 180 degrees;

[0042] Figure 5 is a sectional view of the bottle cap shown in Figure 1 after being assembled to the bottle;

[0043] Figure 6 is a schematic structural diagram of Example 2 of the present application;

[0044] Figure 7 is a sectional view of the bottle cap shown in Figure 6;

[0045] Figure 8 is a schematic structural diagram of Example 3 of the present application;

[0046] Figure 9 is a sectional view of the sealed state after the bottle cap is assembled to the bottle shown in Figure 8;

[0047] Figure 10 is a sectional view of the pressure relief state after the bottle cap is assembled to the bottle mouth shown in Figure 8;

[0048] Figure 11 is a schematic structural diagram of the bottle;

[0049] Figure 12 is a schematic diagram of the structure of Example 4 of the present application;

[0050] Figure 13 is a schematic structural diagram of Figure 12 flip open 180 degrees or more;

[0051] Figure 14 is a schematic diagram of the structure of Example 5 of the present application;

[0052] Figure 15 is a schematic structural diagram of Figure 14 flip open 180 degrees or more;

[0053] Figure 16 is a sectional view of Example 6 of the present application;

[0054] Figure 17 is a schematic diagram of the use state of Example 7 of the present application;

[0055] Figure 18 is a schematic diagram of the three-dimensional structure of Example 8 of the present application;

[0056] Figure 19 is a schematic diagram of the use state of Example 8 of the present application;

[0057] Figure 20 is a sectional view of Example 8 of the present application;

[0058] Figure 21 is an enlarged schematic diagram of Figure 20 A;

[0059] Figure 22 is a schematic diagram of the use state of Example 9 of the present application;

[0060] Figure 23 is a schematic diagram of the use state of Example 10 of the present application;

[0061] Figure 24 is a schematic diagram of the use state of Example 11 of the present application;

[0062] Figure 25 is a schematic diagram of the usage status of Example 12 in this application. DETAILED DESCRIPTION

[0063] The following describes the implementation of the present application in detail with reference to Figures 1-25.

[0064] As shown in Figures 1-11, the present application provides a flip-top retaining structure for a bottle cap, comprising an integrally formed cap body 1, which is integrally injection-molded from a plastic material having a certain elasticity. The cap body 1 is provided with a long tear line 11 and a short tear line 12 along the circumferential direction. The two ends of the long tear line 11 are provided with inner cuts 111 along the axial direction of the cap body 1, and the two ends of the short tear line 12 are provided with outer cuts 121 along the axial direction of the cap body 1. The term "circumferential direction" in the present application refers to the direction along the circumferential surface, which can be an arc located in the same plane, or a shaped line with upper and lower bends not located in the same plane. The axial direction is relative to the circumferential direction, and can be a direction parallel to the axis of the bottle cap, or an inclined direction with a certain angle. The long tear line and the short tear line can be indentations, or can be dotted line cuts, etc.

[0065] As shown in Figures 1-10, after the long tear line 11 and the short tear line 12 are broken, the upper part of the long tear line 11 and the short tear line 12 constitutes the flip cover 3, the lower part constitutes the bottle cap seat 2, and the area between the inner incision 111 and the outer incision 121 constitutes the connecting belt 4; when the flip cover 3 is flipped 180 degrees, there is a contact area between the bottle cap seat 2 and the flip cover 3, and the tension of the connecting belt 4 causes the contact area to produce elastic deformation, or the connecting belt 4 is stretched to produce elastic deformation; when the flip cover 3 is flipped more than 180 degrees, the contact area or the connecting belt 4 rebounds, so that the flip cover 3 is in a force-retained state, avoiding the situation where the flip cover touches the user's mouth or nose during drinking and affecting drinking, and has the characteristics of easy use and easy opening; in addition, the present application sets the length and position of the inner incision and the outer incision, so that the flip cover is in a force-retained state after being flipped more than 180 degrees, simplifies the structure of the bottle cap, and further reduces the difficulty of mold and production.

[0066] Furthermore, the length of the inner notch 111 is greater than the length of the outer notch 121, that is, the length of the connecting band 4 near the outer notch 121 is shorter, while the length of the other side near the inner notch 111 is longer. When the flip cover 3 is opened and the connecting band 4 is forcibly stretched, the shorter side of the connecting band 4 is stretched shorter than the other side. This allows the shorter side of the connecting band 4 to limit the distance between the flip cover 3 and the bottle cap holder 2 from being separated too long, which would cause the flip cover 3 to flip into the bottle cap holder 2 and become unstable. For example, when the flip cover 3 is opened once, this position flips into the bottle mouth. When the flip cover 3 is opened next time, this position flips outside the bottle cap holder 2, thus serving as a positioning function. The longer side of the connecting band 4 increases the length of the connecting band 4, thereby increasing the maximum length of the connecting band 4 that can be forcibly stretched and preventing breakage.

[0067] The bottle cap is circular, and the length and position of the inner cutout 111 and the outer cutout 121 are appropriately set. Generally, the distance between the inner cutout 111 and the outer cutout 121 should be greater than 1 mm. The inner cutout 111 and the outer cutout 121 can be the same length or slightly different. Their shapes can be straight lines along the axis, oblique lines at a certain angle to the axis, or curves of any shape. When the flip cover 3 is flipped 180 degrees, the portion outside the inner cutout 111 is arched. The length of the cutout is less than the sum of the heights of the arches of the flip cover 3 and the bottle cap seat 2 by 0.1 to 5 mm, thereby ensuring a contact point between the bottle cap seat 2 and the flip cover 3.

[0068] For example, in the first solution, the bottle cap seat 2 and the flip cover 3 are made of thin and soft materials, and elastic deformation occurs at the contact portion between the bottle cap seat 2 and / or the flip cover 3. That is, the tension of the connecting belt 4 causes the contact portion to elastically deform (the slight stretching of the connecting belt 4 can be ignored; when the flip cover 3 is flipped 180 degrees, the contact portion and the connecting belt 4 are basically on the same plane; after the flip cover 3 is flipped more than 180 degrees, the contact portion is transferred to the top of the connecting belt 4. After the flip cover 3 is released, the contact portion rebounds, so that the flip cover 3 is in a force-retaining state.

[0069] The second case is that the bottle cap seat 2 and the flip cover 3 are thicker and harder and not easily deformed, so the thickness of the connecting belt 4 can be made smaller and more elastic. When the flip cover 3 is flipped 180 degrees, the connecting belt 4 is stretched to produce elastic deformation (the slight deformation of the bottle cap seat 2 and the flip cover 3 can be ignored; after the flip cover 3 is flipped over 180 degrees, when the hand is released, the connecting belt 4 rebounds, so that the flip cover 3 is in a force-retaining state).

[0070] In other embodiments, a bottle cap seat 2 and a flip cover 3 are included, and a connecting belt 4 is provided between the bottle cap seat 2 and the flip cover 3. When the flip cover 3 is flipped 180 degrees, there is a contact portion between the bottle cap seat 2 and the flip cover 3. The tension of the connecting belt 4 causes the contact portion to produce elastic deformation, or the connecting belt 4 is stretched to produce elastic deformation; when the flip cover 3 is flipped more than 180 degrees, the contact portion or the connecting belt 4 rebounds, so that the flip cover 3 is in a force-retained state. For this structure, although the bottle cap seat 2, the flip cover 3 and the connecting belt 4 are injection molded by the mold at the same time, the bottle cap seat 2 and the flip cover 3 are relatively independent, and there is no other connecting part between the two except the connecting belt 4; for this structure, the diameter of the flip cover 3 can be larger than the diameter of the bottle cap seat 2. After closing, the flip cover 3 is directly mounted on the bottle cap seat 2, or an inward-retracted step portion can be provided at the upper end of the bottle cap seat 2, and the flip cover 3 is mounted on the step portion after closing; a snap-fit ​​structure can also be provided between the flip cover 3 and the bottle cap seat 2 or between the flip cover 3 and the step portion to snap-fit ​​the two together.

[0071] The long tear line 11 has a downwardly bent portion 21 in the middle, forming a downwardly protruding plate 31 at the lower edge of the flip cover 3. The bent portion 21 is preferably a through cut to facilitate opening of the plate 31. The long tear line 11 below and on both sides of the plate 31 is preferably a through cut. The portion below the plate 31 should be of a certain width and have an inclined surface to facilitate opening.

[0072] A folding groove 32 is provided between the upper end of the plate 31 and the flip cover 3. When prying outward from the lower end of the plate 31, the plate 31 bends along the folding groove 32, facilitating opening. The cross-section of the folding groove 32 is V-shaped, and the angles of the two side surfaces of the folding groove 32 can determine the bending angle of the plate 31 along the folding groove 32. For example, the angles of the two side surfaces can be 10-65 degrees, allowing the plate 31 to bend 20-130 degrees along the folding groove 32.

[0073] The top inner side of the flip cover 3 is provided with a sealing plug 33. After being assembled to the bottle mouth, the sealing plug 33 is inserted into the bottle mouth to play a role of strengthening the seal. In order to facilitate the sealing plug to enter and exit the bottle mouth, the height of the sealing plug cannot be very large, as shown in Figure 8.

[0074] The sealing plug 33 is provided with an avoidance slope 331 at a position corresponding to the plate 31 , and the avoidance slope 331 facilitates the sealing plug 33 to be inserted into or removed from the bottle mouth.

[0075] A downwardly projecting guide portion 332 is provided on the portion of the sealing plug 33 away from the plate 31. When the flip cover is flipped nearly 90 degrees, the distal end of the guide portion 332 is already located above the bottle opening. As the flip continues, the guide portion 332 slides into the bottle opening first, ensuring that the flip cover is not easily misaligned when it is closed. Furthermore, either the avoidance slope 331 or the guide portion 332 can be provided, or both can be provided for better results.

[0076] In order to further improve the sealing performance, a sealing ring 333 is provided on the outer surface of the sealing plug 33 .

[0077] As shown in Figures 6 and 7, the diameter of the flip cover 3 is smaller than the diameter of the bottle cap seat 2, and the overall shape is "convex". A thin-walled portion is formed between the lower end of the flip cover 3 and the upper end of the bottle cap seat 2. The long tear line 11 is formed by the thin-walled portion between the bottle cap seat 2 and the flip cover 3, and the short tear line 12 can also be formed by the thin-walled portion between the bottle cap seat 2 and the flip cover 3. The bottle cap with this structure is easier to demould, and does not require secondary processing of the long tear line 11 and the short tear line 12.

[0078] As shown in FIG16 , the short tear line 12 is located on the top surface of the cover body 1, and the upper end of the connecting strip 4 extends to the top surface of the flip cover 3. When flipping the flip cover 3, a certain amount of force needs to be applied to forcibly flip the flip cover 3 backwards by hand, and the connecting strip 4 will be forcibly stretched to a certain extent. The upper end of the connecting strip 4 extends to the top surface of the flip cover 3, which can increase the length of the connecting strip 4, thereby increasing the limit to which the connecting strip 4 can be forcibly stretched, and preventing the connecting strip 4 from being broken. When the flip cover 3 is flipped to 180° or even 220°, there is a contact portion between the bottle cap seat 2 and the flip cover 3. After letting go, the connecting strip 4 retracts, so that the bottle cap seat 2 and the flip cover 3 are in contact. There is a tendency for the bottle cap seat 2 and the flip cover 3 to approach each other, thereby increasing the friction at the contact portion between the bottle cap seat 2 and the flip cover 3, so that the bottle cap seat 2 and the flip cover 3 are pressed against each other and fixed. In the absence of external force, they will not return to a state less than 180 degrees, thereby preventing the flip cover 3 from rebounding and hitting the nose and face when the consumer drinks water. Only when the flip cover 3 is pressed closed by external force and the connecting belt 4 is forcibly stretched again, will the flip cover 3 return to a state less than 180 degrees and close.

[0079] As shown in Figures 12 and 13, the present application discloses a flip-top retaining structure for a bottle cap, comprising a circular cover body 1 integrally formed by injection molding, vacuum molding or blow molding of a plastic material, wherein the cover body 1 is provided with an open connecting tear line 13, wherein the connecting tear line 12 can be a dot-dash line notch, or a continuous or discontinuous indentation, etc.; the cover body 1 is further provided with a folding indentation 14 along the circumferential direction, wherein the folding indentation 14 can be one or more than two in parallel arrangement; the two ends of the folding indentation 14 are connected to the two ends of the connecting tear line 13, and the connecting tear line 13 is ... After breaking, the upper part of the connecting tear line 13 constitutes the flip cover 3, the lower part constitutes the bottle cap seat 2, and the folding indentation 14 forms a connecting belt 4 connecting the flip cover 3 and the bottle cap seat 2; when the flip cover 3 is flipped over 180 degrees along the folding indentation 14, the parts on both sides of the connecting belt 4 are stretched to generate an inward pulling force, which squeezes the contact part between the flip cover 3 and the bottle cap seat 2 to produce an elastic deformation of more than 0.5 mm, and at the same time causes the middle part of the connecting belt 4 to arch upward to generate outward tension, so that the flip cover 3 remains in the open state. Among them, the greater the arc length of the folding indentation 14, the greater the deformation caused by the extrusion of the contact part between the flip cover 3 and the bottle cover seat 2, and the greater the rebound force; the folding indentation is not broken after the flip cover is opened, and in the process of returning the flip cover to the bottle mouth, it will not be interfered by the misalignment of the edges of the flip cover and the bottle cover seat; the arc length of the folding indentation 14 is reasonably set according to the size of the bottle cover, so that the bottle cover can be opened conveniently to achieve the retention of the flip cover and the return of the cover can be facilitated.

[0080] As shown in Figures 14 and 15, the present application provides a flip-top retaining structure for a bottle cap, comprising a circular cover body 1 integrally formed by injection molding, vacuum molding or blow molding of a plastic material, wherein the cover body 1 is provided with an open connecting tear line 13, which can be a dot-dash line cut, or a continuous or discontinuous indentation, etc.; the cover body 1 is further provided with a folding indentation 14 along the circumferential direction, which can be one indentation or two or more indentations arranged in parallel; two axial fracture portions 15 are respectively provided between the two ends of the folding indentation 14 and the two ends of the connecting tear line 13, and the fracture portion 15 can be a through hollow or a non-through hollow. incision, etc.; after the connecting tear line 13 is broken, the upper part of the connecting tear line 13 constitutes the flip cover 3, the lower part constitutes the bottle cap seat 2, the area between the two broken parts 15 forms a bottle cap belt 5 connecting the flip cover 3 and the bottle cap seat 2, and the folding indentation 14 forms a connecting belt 4 connecting the flip cover 3 and the bottle cap seat 2; when the flip cover 3 is flipped over by more than 180 degrees, the bottle cap belt 5 is stretched to generate an inward pulling force, which squeezes the contact part between the flip cover 3 and the bottle cap seat 2 to produce an elastic deformation of more than 0.5 mm, and at the same time causes the connecting belt 4 to arch upward to generate outward tension, so that the flip cover 3 remains in an open state. Among them, the smaller the height of the breaking portion 15, the greater the pulling force generated, the greater the arc length of the folding indentation 14, the greater the deformation caused by the extrusion of the contact part between the flip cover 3 and the bottle cap seat 2, and the greater the rebound force; the folding indentation is not broken after the flip cover is opened, and in the process of returning the flip cover to the bottle mouth, it will not be interfered by the misalignment of the edges of the flip cover and the bottle cap seat; according to the size of the bottle cap, the arc length of the folding indentation 14 and the height of the breaking portion 15 are reasonably set, so that the bottle cap can be opened conveniently to achieve the retention of the flip cover and the return of the cover can be facilitated.

[0081] As shown in Figures 12-15, a sealing plug 33 is installed on the inner side of the top of the flip cover 3. A downwardly protruding guide portion 332 is provided on one side of the sealing plug 33 near the folding indentation 14. During the closing process, the guide portion 332 first extends into the bottle opening, facilitating the complete insertion of the sealing plug 33. A sealing ring 333 is provided on the outer surface of the sealing plug 33, which provides a closer contact with the inner wall of the bottle opening, ensuring a better seal.

[0082] The diameter of the flip cover 3 can be the same as that of the bottle cap seat 2, and the whole is cylindrical; or the diameter of the flip cover 3 can be smaller than the diameter of the bottle cap seat 2, and the whole is stepped; the folding indentation 14 is the thin-walled part between the bottle cap seat 2 and the flip cover 3.

[0083] As shown in Figures 12-15, the connecting strap 4 is composed of a lower connecting strap 41 and an upper connecting strap 42. The lower end of the connecting strap 41 is connected to the bottle cap seat 2, and the upper end of the connecting strap 42 is connected to the flip cover 3. The folding mark 14 is located at the connection between the lower connecting strap 41 and the upper connecting strap 42. As shown in Figure 15, when an external force opens the flip cover 3 around 180 degrees, under the action of the tension of the two bottle cap straps 5, a forced cross force appears between the lower connecting strap 41 and the upper connecting strap 42. Because the connecting lower belt body 41 and the connecting upper belt body 42 are connected together, the connecting lower belt body 41 and the connecting upper belt body 42 will not cross each other. Due to the forced folding back of the flip cover 3, the folding angle between the connecting lower belt body 41 and the connecting upper belt body 42 will be greater than 180 degrees. At this time, the flip cover 3 is released. Due to the pulling effect of the bottle cap belt 5, the connecting lower belt body 41 and the connecting upper belt body 42 are kept at a greater than 180 degrees. When the flip cover 3 needs to be covered, the bottle cap belt 5 is pulled here. The connecting lower belt body 41 and the connecting upper belt body 42 are refolded to a state of less than 180 degrees. Since the thickness of the connecting lower belt body 41 gradually decreases from the bottle cap seat 2 to the flip cover 3, and the thickness of the connecting upper belt body 42 gradually decreases from the flip cover 3 to the bottle cap seat 2, when the flip cover 3 is opened more than 180 degrees, the connecting lower belt body 41 and the connecting upper belt body 42 are more likely to be deformed, so that the connecting lower belt body 41 and the connecting upper belt body 42 can be more smoothly folded to a state of more than 180 degrees.

[0084] As shown in FIG17 , a flip-top retaining structure for a bottle cap includes a bottle cap base 2 and a flip-top 3. A symmetrical connecting band 4 is provided between the bottle cap base 2 and the flip-top 3. The bottle cap base 2 is provided with an upwardly protruding vertical piece 23 between the connecting band 4. The vertical piece 23 is provided with an elastic piece 231. When the bottle cap base 2 is screwed onto the bottle, the elastic piece 231 fits tightly against the bottle mouth. When the flip-top 3 is flipped over, it rotates along the outer side of the elastic piece, thereby preventing the edge of the flip-top 3 from being inserted between the elastic piece and the bottle mouth, which would cause the flip-top 3 to get stuck and cause the bottle to be unable to be closed or opened.

[0085] As shown in Figure 17, a paddle portion 24 is provided on the flip cover 3 corresponding to the elastic piece portion 231, which extends the outer edge of the flip cover 3. When the flip cover 3 is flipped over, the paddle portion will rotate along the outer side of the elastic piece portion, further avoiding the edge of the flip cover 3 from being inserted between the elastic piece portion and the bottle mouth; and when the flip cover 3 is flipped over, the paddle portion 24 pushes the elastic piece portion 231 against each other, thereby generating a sound. At this time, it is the maximum flip angle designed for the flip cover 3. If it continues to flip over, there is a possibility of damaging the bottle cap, which serves as a reminder.

[0086] When the flip cover 3 is closed, the paddle portion 24 is located above the elastic portion 231, and the edge of the paddle portion 24 is flush with the outer side wall of the elastic portion 231, or the edge of the paddle portion 24 exceeds the outer side wall of the elastic portion 231. This ensures that when the flip cover 3 is opened, the paddle portion can rotate along the outer side of the elastic portion, and when the flip cover 3 is closed, the paddle portion does not interfere with the elastic portion. For example, if the bottle cap has a large diameter, the overall strength of the bottle cap is reduced (i.e., a bottle cap with a large diameter is more likely to deform than a bottle cap with a small diameter), the elastic portion may be tilted outward and separated from the bottle mouth, and the edge of the paddle portion may abut against the inner side wall of the elastic portion. When the bottle cap is opened next time, the edge of the paddle portion directly inserts into the gap between the elastic portion and the bottle mouth.

[0087] As shown in Figures 18-25, the present application provides a flip-top retaining structure for a bottle cap, comprising a bottle cap seat 2 and a flip-top 3, wherein the bottle cap seat 2 and the flip-top 3 are connected by a connecting belt 4, and the connecting belt 4 is provided with a crease group consisting of at least two creases, so that the connecting belt 4 is formed into at least a three-section structure, and both sides of the connecting belt 4 are provided with bottle cap belts 5, and the two ends of the bottle cap belt 5 are respectively connected to the bottle cap seat 2 and the flip-top 3. When the flip-top 3 is opened, the connecting belt 4 is folded along the crease group, and the flip-top 3 is pulled by the bottle cap belt 5 to fix the flip-top 3. When the flip cover is opened, the connecting belt is folded along the crease group and the flip cover is pulled by the bottle cap belt 5 to fix the flip cover, which can effectively solve the problem of the connecting belt hitting the user's face due to its resilience. At the same time, it can greatly increase the opening angle of the flip cover to about 270° (as shown in Figures 23-25), which can easily solve the problem of the flip cover directly contacting the user's face when the user is drinking water.

[0088] As shown in FIG21 , the fold group comprises a first fold 401 near the flip cover 3 and a second fold 402 near the bottle cap seat 2. The first fold 401 and the second fold 402 separate the connecting strip 4 into an upper connecting strip 42 connected to the flip cover 3, a lower connecting strip 41 connected to the bottle cap seat 2, and a middle connecting strip 43 located between the first fold 401 and the second fold 402. The first fold 401 and the second fold 402 can be narrow grooves or relatively wide grooves. They can be straight or curved. Furthermore, the first fold 401 and the second fold 402 can be wider grooves, so that the first fold 401 and the second fold 402 are connected to form a single fold.

[0089] When the flip cover 3 is flipped open by an external force around 180 degrees, the connecting belt 4 will change from a folded state (i.e., the state when the flip cover 3 is closed) to a straightened state. Since the bottle cap belt 5 will limit the range of motion of the flip cover 3, in fact, when the flip cover 3 is flipped open to about 150 degrees, the bottle cap belt 5 is in a straightened state, thereby limiting the flip cover 3 from continuing to flip backward. At this time, it is necessary to apply a greater force to forcibly stretch the bottle cap belt 5 so that the flip cover 3 can continue to flip backward; when the flip cover 3 is flipped open to 180 degrees, the bottle cap belt 5 is stretched to its longest state (when the bottle cap belt 5 is stretched to this state, there is still room for stretching, and it is within the range of elastic deformation, so as to avoid the situation where the bottle cap belt 5 cannot retract after being stretched). Therefore, the flip cover 3 is within the range of 150°-180°, and since the connecting belt 4 is not disconnected as a whole, the middle part of the connecting belt 4 will be in a relatively squeezed state (that is, the connecting upper belt body 42 moves toward the connecting lower belt body 41, and the connecting lower belt body 41 moves toward the connecting upper belt body 42, and the connecting middle belt body 43, the first fold 401 and the second fold 402 will change accordingly); the thickness of the connecting upper belt body 42 gradually decreases from the flip cover 3 to the first fold 401, and the thickness of the connecting lower belt body 41 gradually decreases from the bottle cap seat 2 to the second fold 402, so that the connecting upper belt body 42 and the connecting lower belt body 41 can be more easily deformed, so that the flip cover 3 can be more easily folded to a state greater than 180°.

[0090] When the flip cover 3 is opened more than 180 degrees, the bottle cap belt 5 retracts, thereby continuing to flip the flip cover 3 backward until the bottle cap belt 5 retracts to the initial state. At this time, the flip cover 3 is in the normal open state (as shown in Figures 23-25).

[0091] The thickness of the connecting middle band 43 gradually increases from the first fold 401 and the second fold 402 on both sides toward the middle, increasing the strength of the connecting middle band 43 and preventing the upper connecting band 42 and the lower connecting band 41 from squeezing each other when the flip cover 3 is within the range of 150°-180°, causing the connecting middle band 43 to undergo irreversible deformation, thereby affecting the opening and closing of the flip cover 3. For example, when the connecting middle band 43 is squeezed, it forms a bulge in the middle, which will cause the distance between the first fold 401 and the second fold 402 to shorten, thereby shortening the connecting band 4 as a whole, and preventing the flip cover 3 from being smoothly closed.

[0092] When the flip cover 3 is opened, the two sides of the opening of the first fold 401 and the second fold 402 move closer to each other until they touch each other, which is the maximum opening angle of the flip cover 3. The two sides of the first fold 401 and the second fold 402 can be perpendicular to the bottom of the fold, or they can form an obtuse angle structure or an acute angle structure with the bottom of the fold. When it is an obtuse angle structure, the two sides of the opening of the fold move closer to each other until the distance of touching each other is greater, and the angle of the flip cover 3 is larger; conversely, when it is an acute angle structure, the angle of the flip cover 3 is smaller. It can be adjusted according to the actual bottle structure and the scope of use. For example, in a seasoning bottle, the flip cover 3 will not hit the user's face, and the opening angle of the flip cover 3 can be relatively smaller. In the case of a beverage bottle, the opening angle of the flip cover 3 can be relatively larger. It can also be appropriately adjusted according to the diameter (width) of the bottle body. For example, for common mineral water bottles on the market, the ratio of the bottle body to the bottle mouth is relatively small. When the flip cover 3 is opened to about 270 degrees, there will be no contact between the flip cover 3 and the bottle body. For another example, if the ratio of the bottle body to the bottle mouth is relatively large, that is, when the width of the bottle body is large, if the flip cover 3 is opened too much, there will be contact between the flip cover 3 and the upper part of the bottle body, making it unable to reach the maximum opening angle, and thus easy to rebound.

[0093] According to different bottle body structures, the sizes of the connecting upper belt 42, the connecting lower belt 41 and the connecting middle belt 43 are adaptively changed, and the position distance between the first fold 401 and the second fold 402 is specially designed according to the structure of the bottle body.

[0094] Furthermore, the connection point between the connecting belt 4 and the flip cover 3 is located at any one of the upper end, middle end and lower end of the flip cover 3 .

[0095] The connecting strip 43 may be of uniform thickness throughout, or thicker at both ends than in the middle, so that the connecting strip 43 has an arcuate structure. The first fold 401 and the second fold 402 are where the connecting strip 4 is relatively thin.

[0096] As shown in FIG. 19 , the bottle cap belt 5 and the connecting belt 4 are an integrated structure, which is simpler in structure.

[0097] As shown in FIG22 , the bottle cap belt 5 and the connecting belt 4 are separate structures, and a gap groove is provided between the bottle cap belt 5 and the connecting belt 4 to separate the bottle cap belt 5 and the connecting belt 4 to avoid mutual interference when the flip cover 3 is opened. When the flip cover 3 is opened, the bottle cap belt 5 will be forcibly stretched. If the bottle cap belt 5 and the connecting belt 4 are connected together, the connecting belt 4 will also be stretched synchronously. At the same time, since the bottle cap belt 5 and the connecting belt 4 are equivalent to a wider connecting belt, the range of elastic deformation is reduced, and the belt may even be directly broken.

[0098] As shown in Figures 23-25, the connection between the connecting belt 4 and the bottle cap seat 2 is located at any one of the upper end, middle end and lower end of the bottle cap seat 2.

[0099] The bottle cap belt 5 is a curved structure, which can be a single curve or a plurality of mutually opposite curves, such as a wave structure; the curved structure can be a curve in the left-right direction or a curve in the front-back direction. By bending, the length of the bottle cap belt 5 is increased, and the extended length can be further increased.

[0100] The connecting belt 4 is a curved structure, which is based on the same principle as the curved structure of the bottle cap belt 5. The curved structures of the connecting belt 4 and the bottle cap belt 5 are similar in shape, ensuring the consistency of the overall appearance and avoiding the situation where the bottle cap belt 5 has a multi-layer wavy structure and the connecting belt 3 has a single curved structure.

[0101] As shown in Figures 5, 8-11, the present application discloses a bottle adopting a flip-cap retaining structure of a bottle cap as described above, including a bottle body 100, the bottle mouth of the bottle body 100 is provided with an external thread 110, and a support block 311 is provided on the inner side of the plate 31, and the support block 311 is located entirely or partially below the folding groove 32. The "below" here means that the support block 311 is located entirely or partially below the circumferential plane where the folding groove 32 is located; when the cover body 1 is assembled to the bottle mouth, the lower surface of the support block 311 is against the upper surface of the external thread 110, and after the plate 31 is bent about 90 degrees along the folding groove 32, the plate 31 is continued to be lifted upward, and based on the principle of leverage, an upward force is applied to the flip cap to partially break the long tear line, and then only a small force is needed to break the long tear line completely, making it easy to open.

[0102] As shown in Figures 5, 8-11, in order to ensure safety in use, the present application discloses a bottle adopting the flip-top retaining structure of the bottle cap as described above, including a bottle body 100, the bottle mouth of the bottle body 100 is provided with an external thread 110, the lower part of the external thread 110 is provided with an upper convex ring 120 and a lower convex ring 130, and a limiting groove is formed between the upper convex ring 120 and the lower convex ring 130; the lower inner wall of the cover body 1 is provided with a limit block 22 which is placed inside the limiting groove after the cover body 1 is assembled to the bottle mouth; when the cover body 1 is rotated forward and the limit block 22 is blocked by the lower convex ring 130, the top inner side of the flip cover 3 blocks the bottle mouth; when the cover body 1 is rotated backward and the limit block 22 is blocked by the upper convex ring 120, the top inner side of the flip cover 3 is separated from the upper end wall of the bottle mouth to form a pressure relief gap. A sealing plug 33 is located on the inner side of the top of the flip lid 3. When the lid 1 is rotated forward, the stopper 22 is blocked by the lower protruding ring 130, and the sealing plug 33 is fully inserted into the bottle mouth, forming a seal. When the lid 1 is rotated backward, the stopper 22 is blocked by the upper protruding ring 120, and the sealing plug 33 partially disengages from the bottle mouth, forming a pressure-relieving gap between the sealing plug 33 and the bottle mouth. This bottle is suitable for holding liquids such as carbonated beverages. When opening the bottle, the bottle cap is first rotated to release pressure to prevent liquid from spraying during opening.

[0103] In other embodiments, a sealing plug 33 is provided on the inner side of the top of the flip cover 3, and a sealing ring 333 is provided on the outer surface of the sealing plug 33. The sealing ring 333 has an upward-bending pressure relief bend. When the cover body 1 is rotated forward so that the limit block 22 is blocked by the lower convex ring 130, the sealing ring 333 is fully inserted into the bottle mouth to form a seal; when the cover body 1 is rotated backward so that the limit block 22 is blocked by the upper convex ring 120, the pressure relief bend is completely or partially separated from the bottle mouth, so that a pressure relief gap is formed between the pressure relief bend and the bottle mouth.

Claims

1. A flip cover holding structure for a bottle cap, characterized in that The invention comprises a bottle cap seat (2) and a flip cover (3), wherein a connecting belt (4) is arranged between the bottle cap seat (2) and the flip cover (3); when the flip cover (3) is flipped 180 degrees, a contact portion exists between the bottle cap seat (2) and the flip cover (3); the tension of the connecting belt (4) causes the contact portion to produce elastic deformation, or the connecting belt (4) is stretched to produce elastic deformation; when the flip cover (3) is flipped over 180 degrees, the contact portion or the connecting belt (4) rebounds, so that the flip cover (3) is in a force-retaining state.

2. The flip cover holding structure of a bottle cap according to claim 1, characterized in that The invention also comprises an integrally formed cover body (1), wherein the cover body (1) is provided with a long tear line (11) and a short tear line (12) along the circumferential direction, and both ends of the long tear line (11) are provided with inner cuts (111) along the axial direction of the cover body (1), and both ends of the short tear line (12) are provided with outer cuts (121) along the axial direction of the cover body (1). After the long tear line (11) and the short tear line (12) are broken, the upper part of the long tear line (11) and the short tear line (12) constitute the flip cover (3), and the lower part constitutes the bottle cap seat (2), and the portion between the inner cut (111) and the outer cut (121) constitutes the connecting belt (4).

3. A bottle cap flip cover holding structure according to claim 2, characterized in that The middle portion of the long tear line (11) has a bent portion (21) bent downward, so that the lower edge of the flip cover (3) forms a plate (31) protruding downward.

4. The flip cover holding structure of a bottle cap according to claim 3, characterized in that A folding groove (32) is provided between the upper end of the plate (31) and the flip cover (3).

5. The flip cover holding structure of a bottle cap according to claim 3, characterized in that A sealing plug (33) is provided on the inner side of the top of the flip cover (3); or a sealing plug (33) is provided on the inner side of the top of the flip cover (3), and a avoiding inclined surface (331) is provided on the sealing plug (33) at a position corresponding to the plate (31); or a sealing plug (33) is provided on the inner side of the top of the flip cover (3), and a downwardly protruding guide portion (332) is provided on the position of the sealing plug (33) away from the plate (31); or a sealing plug (33) is provided on the inner side of the top of the flip cover (3), and a sealing ring (333) is provided on the outer surface of the sealing plug (33).

6. The flip cover holding structure of a bottle cap according to claim 2, characterized in that The short tear line (12) is located on the top surface of the cover body (1), and / or the upper end of the connecting belt (4) extends to the top surface of the flip cover (3).

7. A flip cover holding structure for a bottle cap, characterized in that The invention comprises an integrally formed cover body (1), wherein the cover body (1) is provided with an open connecting tear line (13), and the cover body (1) is further provided with a folding indentation (14) along the circumferential direction, wherein two ends of the folding indentation (14) are connected to two ends of the connecting tear line (13), and after the connecting tear line (13) is broken, the upper part of the connecting tear line (13) forms a flip cover (3), and the lower part forms a bottle cap seat (2), and the folding indentation (14) forms a connecting belt (4) connecting the flip cover (3) and the bottle cap seat (2); when the flip cover (3) is flipped over 180 degrees or more along the folding indentation (14), the parts on both sides of the connecting belt (4) are stretched to generate an inward pulling force, and the pulling force causes the contact part between the flip cover (3) and the bottle cap seat (2) to be squeezed to generate an elastic deformation of more than 0.5 mm, and at the same time causes the middle part of the connecting belt (4) to arch upward to generate an outward tension, so that the flip cover (3) remains in an open state.

8. The flip cover holding structure of a bottle cap according to claim 7, characterized in that A sealing plug (33) is provided on the inner side of the top of the flip cover (3); or a sealing plug (33) is provided on the inner side of the top of the flip cover (3), and a downwardly protruding guide portion (332) is provided on one side of the sealing plug (33) close to the folding indentation (14).

9. The flip cover holding structure of a bottle cap according to claim 7, characterized in that The connecting belt (4) is composed of a connecting lower belt body (41) and a connecting upper belt body (42), the lower end of the connecting lower belt body (41) is connected to the bottle cap seat (2), the upper end of the connecting upper belt body (42) is connected to the flip cover (3), and the folding indentation (14) is located at the connection between the connecting lower belt body (41) and the connecting upper belt body (42).

10. A flip cover holding structure for a bottle cap, characterized in that The invention comprises an integrally formed cover body (1), wherein the cover body (1) is provided with an open connecting tear line (13), and the cover body (1) is further provided with a folding indentation (14) along the circumferential direction, and two axial breaking portions (15) are respectively provided between the two ends of the folding indentation (14) and the two ends of the connecting tear line (13); after the connecting tear line (13) is broken, the upper part of the connecting tear line (13) constitutes the flip cover (3), the lower part constitutes the bottle cap seat (2), and the area between the two breaking portions (15) forms a connecting A bottle cap belt (5) connecting the flip cover (3) and the bottle cap seat (2) is folded at the indentation (14) to form a connecting belt (4) connecting the flip cover (3) and the bottle cap seat (2); when the flip cover (3) is flipped over by more than 180 degrees, the bottle cap belt (5) is stretched to generate an inward pulling force, which causes the contact part between the flip cover (3) and the bottle cap seat (2) to be squeezed to generate an elastic deformation of more than 0.5 mm, and at the same time causes the connecting belt (4) to arch upward to generate an outward tension, so that the flip cover (3) remains in an open state.

11. The flip cover holding structure of a bottle cap according to claim 10, characterized in that A sealing plug (33) is provided on the inner side of the top of the flip cover (3); or a sealing plug (33) is provided on the inner side of the top of the flip cover (3), and a downwardly protruding guide portion (332) is provided on one side of the sealing plug (33) close to the folding indentation (14).

12. The flip cover holding structure of a bottle cap according to claim 10, characterized in that The connecting belt (4) is composed of a connecting lower belt body (41) and a connecting upper belt body (42), the lower end of the connecting lower belt body (41) is connected to the bottle cap seat (2), the upper end of the connecting upper belt body (42) is connected to the flip cover (3), and the folding indentation (14) is located at the connection between the connecting lower belt body (41) and the connecting upper belt body (42).

13. A bottle using the flip cover holding structure of the bottle cap as claimed in any one of claims 3 to 5, characterized in that It comprises a bottle body (100), the bottle mouth of the bottle body (100) is provided with an external thread (110), a support block (311) is provided on the inner side of the plate (31), and when the cover body (1) is assembled to the bottle mouth, the lower surface of the support block (311) abuts against the upper surface of the external thread (110).

14. A bottle using the flip cover holding structure of a bottle cap as claimed in any one of claims 2 to 12, characterized in that The invention comprises a bottle body (100), wherein the bottle mouth of the bottle body (100) is provided with an external thread (110), and the lower part of the external thread (110) is provided with an upper convex ring (120) and a lower convex ring (130), and a limiting groove is formed between the upper convex ring (120) and the lower convex ring (130); the lower inner wall of the cover body (1) is provided with a limiting block (22) which is placed inside the limiting groove when the cover body (1) is assembled to the bottle mouth; when the cover body (1) is rotated forward so that the limiting block (22) is blocked by the lower convex ring (130), the inner side of the top of the flip cover (3) blocks the bottle mouth; when the cover body (1) is rotated backward so that the limiting block (22) is blocked by the upper convex ring (120), the inner side of the top of the flip cover (3) is separated from the upper end wall of the bottle mouth to form a pressure relief gap.

15. A bottle according to claim 14, characterized in that A sealing plug (33) is provided on the inner side of the top of the flip cover (3); when the cover body (1) is rotated forward so that the limit block (22) is blocked by the lower convex ring (130), the sealing plug (33) is completely inserted into the bottle mouth to form a seal; when the cover body (1) is rotated backward so that the limit block (22) is blocked by the upper convex ring (120), the sealing plug (33) is partially separated from the bottle mouth, so that a pressure relief gap is formed between the sealing plug (33) and the bottle mouth.

16. A flip cover holding structure for a bottle cap, characterized in that The invention comprises a bottle cap seat (2) and a flip cover (3), wherein a symmetrical connecting belt (4) is arranged between the bottle cap seat (2) and the flip cover (3), and the bottle cap seat (2) is provided with an upwardly protruding vertical sheet portion (23) located between the connecting belt (4), and an elastic sheet portion (231) is arranged on the vertical sheet portion (23), and when the bottle cap seat (2) is screwed onto the bottle, the elastic sheet portion (231) is tightly fitted with the bottle mouth.

17. The flip cover holding structure of a bottle cap according to claim 16, characterized in that The flip cover (3) is provided with a paddle portion (24) corresponding to the elastic portion (231); during the flipping process of the flip cover (3), the paddle portion (24) pushes the elastic portion (231) against each other, thereby generating a sound.

18. The flip cover holding structure of a bottle cap according to claim 17, characterized in that When the flip cover (3) is closed, the paddle portion (24) is located above the spring portion (231), and the edge of the paddle portion (24) is flush with the outer wall of the spring portion (231), or the edge of the paddle portion (24) exceeds the outer wall of the spring portion (231).

19. A flip cover holding structure for a bottle cap, characterized in that The invention comprises a bottle cap seat (2) and a flip cover (3), wherein the bottle cap seat (2) and the flip cover (3) are connected via a connecting belt (4), wherein the connecting belt (4) is provided with a fold group consisting of at least two folds, so that the connecting belt (4) forms at least a three-section structure, and both sides of the connecting belt (4) are provided with bottle cap belts (5), and the two ends of the bottle cap belt (5) are respectively connected to the bottle cap seat (2) and the flip cover (3). When the flip cover (3) is flipped open, the connecting belt (4) is folded along the fold group, and the flip cover (3) is pulled by the bottle cap belt (5) to fix the flip cover (3).

20. The flip cover holding structure of a bottle cap according to claim 19, characterized in that The fold group is composed of a first fold (401) close to the flip cover (3) and a second fold (402) close to the bottle cap seat (2); the first fold (401) and the second fold (402) separate the connecting belt (4) into an upper connecting belt body (42) connected to the flip cover (3), a lower connecting belt body (41) connected to the bottle cap seat (2), and a middle connecting belt body (43) located between the first fold (401) and the second fold (402).

21. The flip cover holding structure of a bottle cap according to claim 20, characterized in that The thickness of the connecting upper belt body (42) gradually decreases in the direction from the flip cover (3) toward the first fold (401); And / or, the thickness of the lower connecting belt (41) gradually decreases in the direction from the bottle cap seat (2) toward the second fold (402); And / or, the thickness of the connecting belt body (43) gradually increases from the first folds (401) and the second folds (402) on both sides toward the middle.

22. The flip cover holding structure of a bottle cap according to claim 19, characterized in that The connection point between the connecting belt (4) and the flip cover (3) is located at the upper end, middle end or lower end of the flip cover (3); And / or, the connection point between the connecting belt (4) and the bottle cap seat (2) is located at the upper end, middle end or lower end of the bottle cap seat (2).

23. The flip cover holding structure of a bottle cap according to claim 19, characterized in that The bottle cap belt (5) and the connecting belt (4) are an integrated structure; And / or, the bottle cap belt (5) and the connecting belt (4) are separate structures, and a gap groove is provided between the bottle cap belt (5) and the connecting belt (4).

24. The flip cover holding structure of a bottle cap according to claim 19, characterized in that The connecting belt (4) and / or the bottle cap belt (5) are of curved structure.

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