Lightweight small-caliber bottle cap structure

Abstract

The utility model discloses a light-weight small-caliber bottle cap structure which comprises a bottle cap body with a top wall and a side wall. The inner surface of the side wall is provided with a thread fastening structure; the edge of the inner surface of the top wall is provided with a sealing structure; a first rubber reducing cutting ring and an anti-skid structure are formed on the outer surface of the side wall; the first rubber reducing cutting ring extends to the outer surface of the top wall from the middle of the side wall; the anti-skid structure comprises first anti-skid teeth and second anti-skid teeth, the first anti-skid teeth extend to the outer surface of the top wall from the middle of the side wall, and the second anti-skid teeth are arranged in the middle of the side wall; the first anti-skid teeth and the second anti-skid teeth are arranged in the first rubber reducing cutting ring at intervals; an anti-theft structure is connected to the edge of the bottom of the bottle cap body and is broken after being opened for the first time to serve as an opening mark. The bottle cap can be matched with small-caliber bottle mouths such as GME30.40, GME30.41, GME30.37 and the like, the basic functional performance of the bottle cap is guaranteed, the overall gram weight of the bottle cap is further reduced, and the cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of bottle caps, in particular to a lightweight small-caliber bottle cap structure. Background Art

[0002] Carbonated drinks are beverages filled with carbon dioxide and are popular all over the world. In recent years, people's awareness of healthy consumption has been upgraded, and the demand for beverages has diversified, providing market space for the carbonated beverage industry, which has growth potential in emerging markets and developing countries.

[0003] There are standard specifications for carbonated beverage packaging containers on the market. The mainstream carbonated beverage application bottle mouth is PCO1881. Plastic bottle caps are an important part of the packaging industry and are widely used in the packaging of various liquid and solid products. Manufacturers use plastic bottle caps to package products and sell them. The development and design optimization of new bottle mouths pose new challenges to plastic bottle caps. The two promote and influence each other.

[0004] In recent years, the bottle mouths for carbonated beverages, such as GME30.40, GME30.41, GME30.37, have tended to use small-diameter bottle mouths, conveying a trend of replacing the traditional PC01881 bottle mouth phenomenon, and the demand for bottle caps matching small-diameter bottle mouths has also emerged.

[0005] At present, the mainstream carbonated beverage packaging is a 2.35-gram plastic bottle cap that matches the PCO1881 bottle mouth. Matching its structure to a bottle cap with a small-diameter bottle mouth will result in a relatively heavy weight of a single product, high cost, and a certain waste of resources. Therefore, it is necessary to improve the bottle cap structure and provide a bottle cap that can match a small-diameter bottle mouth, which can further reduce the overall weight of the bottle cap and save costs while ensuring the basic functional performance of the bottle cap. Utility Model Content

[0006] In order to overcome the shortcomings of the prior art, the purpose of the utility model is to provide a lightweight small-diameter bottle cap structure that can match the use of small-diameter bottles such as GME30.40, GME30.41, GME30.37, etc., while ensuring the basic functional performance of the bottle cap, further reducing the overall weight of the bottle cap and saving costs.

[0007] The purpose of the utility model is achieved by the following technical solutions:

[0008] A lightweight small-caliber bottle cap structure comprises a bottle cap body, wherein the bottle cap body has a top wall and a side wall;

[0009] The inner surface of the side wall has a threaded fastening structure, and the threaded fastening structure is used to cooperate with the bottle mouth thread to connect; the edge of the inner surface of the top wall is provided with a sealing structure, and the sealing structure is used to be sealed and connected with the bottle mouth;

[0010] The outer surface of the side wall is formed with a first rubber-reducing cutting ring; the first rubber-reducing cutting ring extends from the middle of the side wall to the outer surface of the top wall; the outer surface of the side wall is formed with an anti-skid structure, the anti-skid structure includes a first anti-skid tooth and a second anti-skid tooth, the first anti-skid tooth extends from the middle of the side wall to the outer surface of the top wall, and the second anti-skid tooth is arranged in the middle of the side wall; the first anti-skid tooth and the second anti-skid tooth are arranged in the first rubber-reducing cutting ring at intervals;

[0011] The bottle cap also includes an anti-theft structure, which is connected to the bottom edge of the bottle cap body and serves as an opening mark by breaking after the initial opening.

[0012] In an optional implementation manner, the first anti-slip teeth and the second anti-slip teeth are both arranged perpendicular to the top wall; and the length of the second anti-slip teeth does not exceed 1 / 2 of the first anti-slip teeth.

[0013] In an optional embodiment, the sealing structure includes a main sealing section, an auxiliary sealing section and a secondary auxiliary sealing section; the main sealing section is an olive-shaped annular inner plug arranged on the circumference of the inner surface of the top wall; the auxiliary sealing section is an annular flange arranged on the inner surface of the connection between the side walls; the secondary auxiliary sealing section is an annular protrusion arranged between the main sealing section and the auxiliary sealing section.

[0014] In an optional embodiment, the end of the auxiliary sealing segment has an inward barb.

[0015] In an optional embodiment, a second rubber reducing cutting ring is formed inside the first rubber reducing cutting ring; the second rubber reducing cutting ring is arranged on the outer surface of the connection between the side wall and the top wall, so that the second rubber reducing cutting ring and the auxiliary sealing section are arranged relative to the inner and outer surfaces of the bottle cap body.

[0016] In an optional implementation, the threaded fastening structure is a plurality of trapezoidal thread segments arranged at intervals, and an exhaust hole is provided between two adjacent trapezoidal thread segments.

[0017] In an optional embodiment, the threaded fastening structure has a clamping portion and an introduction portion, the introduction portion is arranged close to the bottom of the side wall; the clamping portion is composed of a plurality of trapezoidal thread segments, and the trapezoidal thread segments of the clamping portion are of the same size; the introduction portion is composed of a plurality of trapezoidal thread segments, and the width and height of the trapezoidal thread segments of the introduction portion decrease toward the bottom of the side wall.

[0018] In an optional embodiment, a third glue reducing groove is opened on the inner surface of the side wall, and a plurality of the third glue reducing grooves are arranged in a ring array on the inner surface of the side wall.

[0019] In an optional embodiment, the anti-theft structure includes an anti-theft ring, and a pre-breaking ring is formed at the connection between the anti-theft ring and the bottle cap body, and the pre-breaking ring is formed by a plurality of connecting bridges and leakage holes arranged at intervals.

[0020] In an optional embodiment, a plurality of blades are formed at one end of the anti-theft ring away from the bottle cap body, the blades are connected between two adjacent connecting bridges, and the blades have a supporting portion for clamping the anti-theft ring to the bottle mouth.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] The lightweight small-diameter bottle cap structure of the utility model is connected with the bottle mouth thread through the threaded fastening structure. When screwed in, the middle part of the side wall serves as the main gripping position, and the bottle cap body is spirally moved downward to mesh and connect with the bottle mouth spiral line; at this time, the sealing structure contacts the bottle mouth to form a sealing surface, ensuring that it can still have good sealing performance under the sudden deformation state of the bottle cap at room temperature, low temperature or high temperature environment, effectively extending the shelf life of the packaged product; the anti-theft structure breaks after the first opening, indicating the safe opening performance, thereby protecting the safety of consumers during use. The first anti-skid teeth and the second anti-skid teeth are arranged perpendicular to the top wall. The first anti-skid teeth and the second anti-skid teeth are arranged at intervals in the middle of the outer surface of the side wall to increase the friction between the bottle cap and the hand when the bottle cap is grasped. The first anti-skid teeth extend to the outer surface of the top wall and are supported at the connection between the side wall and the top wall as a rib reinforcement structure. While reducing the weight of the bottle cap, the supporting strength of the bottle cap body is guaranteed to prevent the side wall of the bottle cap body from bulging and cracking. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A three-dimensional diagram of a lightweight small-diameter bottle cap structure of Example 1;

[0024] Figure 2 A three-dimensional view of a lightweight small-diameter bottle cap structure from another angle of Example 1;

[0025] Figure 3 It is a cross-sectional view of a lightweight small-diameter bottle cap structure of Example 1;

[0026] Figure 4 It is a partial enlarged view of the lightweight small-diameter bottle cap structure of Example 1;

[0027] Figure 5 A cross-sectional view of a lightweight small-diameter bottle cap structure from another angle of Example 1;

[0028] Figure 6 This is a schematic diagram of the lightweight small-diameter bottle cap structure in use according to Example 1;

[0029] Figure 7 Schematic diagram of the matching state of the lightweight small-diameter bottle cap structure and the bottle mouth of Example 1.

[0030] In the figure: 10, top wall; 11, sealing structure; 111, main sealing section; 112, auxiliary sealing section; 113, secondary auxiliary sealing section; 20, side wall; 21, threaded fastening structure; 211, trapezoidal screw thread section; 212, exhaust hole; 213, introduction part; 22, anti-skid structure; 221, first anti-skid tooth; 222, second anti-skid tooth; 23, first rubber reduction cutting ring; 24, second rubber reduction cutting ring; 25, third rubber reduction groove; 30, anti-theft structure; 31, anti-theft ring; 311, fan blade; 32, connecting bridge; 33, leakage hole; 90, bottle mouth. DETAILED DESCRIPTION

[0031] Below, in conjunction with the accompanying drawings and specific implementation methods, the utility model is further described. It should be noted that, under the premise of no conflict, the various embodiments described below or the various technical features can be arbitrarily combined to form a new embodiment. Except for special instructions, the materials and equipment used in this embodiment can be purchased from the market. Examples of the embodiments are shown in the accompanying drawings, in which the same or similar numbers throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0032] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In the description of the present application, "plurality" means two or more, unless otherwise precisely and specifically specified.

[0033] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, or it can be connected through an intermediary medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0034] The terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0035] Embodiment 1:

[0036] Please refer to Figure 1-7 The present embodiment provides a lightweight small-diameter bottle cap structure, including a bottle cap body, wherein the bottle cap body has a top wall 10 and a side wall 20. In the present embodiment, the top wall 10 is a circular cover plate, and the side wall 20 is a tubular side plate. The top wall 10 is connected to one end of the side wall 20, so that a cylindrical groove capable of accommodating a bottle mouth 90 is formed inside the bottle cap body. The inner side referred to in the present embodiment is the side close to the cylindrical groove, the outer side is the side away from the cylindrical groove, the bottom is the side away from the top wall 20, and the top is the side close to the top.

[0037] In this embodiment, the inner surface of the side wall 20 has a threaded fastening structure 21, which is used to threadably connect with the bottle mouth 90; the edge of the inner surface of the top wall 10 is provided with a sealing structure 11, which is used to seal and connect with the bottle mouth 90.

[0038] A first rubber-reducing cutting ring 23 is formed on the outer surface of the side wall 20; the first rubber-reducing cutting ring 23 extends from the middle of the side wall 20 to the outer surface of the top wall 10; an anti-skid structure 22 is formed on the outer surface of the side wall 20, and the anti-skid structure 22 includes a first anti-skid tooth 221 and a second anti-skid tooth 222, and the first anti-skid tooth 221 and the second anti-skid tooth 222 are both arranged perpendicular to the top wall 10; the first anti-skid tooth 221 extends from the middle of the side wall 20 to the outer surface of the top wall 10 to form a structure similar to a rib plate to provide support, and the second anti-skid tooth 222 is arranged in the middle of the side wall 20; the first anti-skid tooth 221 and the second anti-skid tooth 222 are arranged at intervals in the first rubber-reducing cutting ring 23, and preferably, the length of the second anti-skid tooth 222 does not exceed 1 / 2 of the first anti-skid tooth 221.

[0039] The bottle cap also includes an anti-theft structure 30, which is connected to the bottom edge of the bottle cap body. The anti-theft structure 30 serves as an opening mark by breaking after the initial opening.

[0040] The lightweight small-diameter bottle cap structure of the present embodiment is used in combination with the bottle mouth 90. The threaded fastening structure 21 is threadedly connected to the bottle mouth 90. When screwed in, the middle of the side wall 20 serves as the main gripping position, and the bottle cap body is spirally moved downward. When the spiral movement reaches a certain stroke, the front end of the threaded fastening structure 21 first contacts the bottle mouth 90, and the bottle cap body and the spiral line of the bottle mouth 90 form a preliminary meshing coaxial relationship until the rotation movement stops after contacting the end face of the bottle mouth; at this time, the sealing structure 11 contacts the bottle mouth to form a sealing surface, ensuring that it still has good sealing performance under the sudden deformation state of the bottle cap at room temperature, low temperature or high temperature environment, effectively extending the shelf life of the packaged product; the anti-theft structure 30 breaks after the first opening, indicating safe opening performance, thereby protecting the safety of consumers during use. The first anti-skid teeth 221 and the second anti-skid teeth 222 are arranged perpendicular to the top wall 10; the first anti-skid teeth 221 and the second anti-skid teeth 222 are arranged at intervals in the middle of the outer surface of the side wall 20 to increase the friction between the bottle cap and the hand when the bottle cap is grasped; the first anti-skid teeth 221 extend to the outer surface of the top wall 10 and are supported at the connection between the side wall and the top wall as a rib reinforcement structure, while reducing the weight of the bottle cap, ensuring the supporting strength of the bottle cap body and preventing the side wall of the bottle cap body from bulging and rupture. The outer edges of the first anti-skid teeth 221 and the second anti-skid teeth 222 are both arc-shaped surfaces, which are conducive to molding and demoulding.

[0041] The sealing structure 11 of this embodiment includes a main sealing section 111, an auxiliary sealing section 112 and a secondary auxiliary sealing section 113; the main sealing section 111 is an olive-shaped annular inner plug arranged on the circumference of the inner surface of the top wall 10; the auxiliary sealing section 112 is an annular flange arranged on the inner surface of the connection between the side wall 20 and the top wall 10, and the secondary auxiliary sealing section 113 can be straight or barbed, that is, the end of the auxiliary sealing section 112 has an inward barb; the secondary auxiliary sealing section 113 is an annular protrusion arranged between the main sealing section 111 and the auxiliary sealing section 112. When in use, the end face of the bottle mouth 90 is pressed against the inside of the bottle cap body, and at this time, the olive-shaped annular inner plug of the main sealing section 111 and the inner wall of the bottle mouth 90 are squeezed against each other to form a first sealing surface; the annular flange of the auxiliary sealing section 112 and the outer side of the bottle mouth 90 are squeezed against each other to form a second sealing surface; the annular protrusion of the secondary auxiliary sealing section 113 and the end face of the bottle mouth 90 are pressed against each other to form a third sealing surface; the three-section sealing structure makes the sealing structure 11 more reliable and stable, ensuring that the bottle cap can still have good sealing performance under the sudden deformation state at room temperature, low temperature or high temperature environment, effectively extending the shelf life of the packaged product.

[0042] Furthermore, a second glue reducing cutting ring 24 is formed at the end of the first glue reducing cutting ring 23; the second glue reducing cutting ring 24 is arranged on the outer surface of the connection between the side wall 20 and the top wall 10, so that the second glue reducing cutting ring 24 and the auxiliary sealing section 112 are arranged relatively on the inner and outer surfaces of the bottle cap body, and the hierarchical design is conducive to molding and demolding; and due to the setting of the auxiliary sealing section 112, the bottle cap body has more glue reducing space. At this time, the first anti-slip tooth 221 is supported at the connection between the side wall 20 and the top wall 10 to form its supporting and reinforcing effect, thereby ensuring the supporting strength of the bottle cap.

[0043] The threaded fastening structure 21 of this embodiment is a trapezoidal screw thread segment 211 arranged at multiple intervals, and an exhaust hole 212 is provided between two adjacent trapezoidal screw thread segments 211. When unscrewing the bottle cap, the gas is discharged from the exhaust hole 212 in advance to avoid the bottle cap flying off when unscrewing too quickly. The threaded fastening structure 21 has a clamping portion and an introduction portion 213, and the introduction portion 213 is arranged near the bottom of the side wall 20; the clamping portion is composed of a plurality of trapezoidal screw thread segments 211, and the trapezoidal thread segments of the clamping portion are of the same size; the introduction portion 213 is composed of a plurality of trapezoidal screw thread segments 211, and the width and height of the trapezoidal screw thread segments 211 of the introduction portion 213 decrease toward the bottom of the side wall 20. When screwing in, the introduction part 213 first contacts the bottle mouth 90, and under the guidance of the introduction part 213, the bottle mouth enters the clamping part to form a coaxial relationship, and a progressive step relationship is made through the introduction part 213 to ensure that the bottle cap has a good clamping force when the bottle cap is in a state of sudden deformation caused by the bottle cap at room temperature, low temperature or high temperature environment, thereby providing better introduction and clamping force for the screwing in of the bottle cap body.

[0044] Furthermore, a third glue reduction groove 25 is provided on the inner surface of the side wall 20, and a plurality of the third glue reduction grooves 25 are arranged in a circular array on the inner surface of the side wall 20. The third glue reduction groove 25 is spaced apart from the vent hole 212, which reduces the overall weight of the bottle cap and provides an exhaust or leakage channel when the bottle cap is opened, thereby preventing the soda in the bottle from gushing out at the moment of opening the cap.

[0045] The anti-theft structure 30 of this embodiment includes an anti-theft ring 31, and the anti-theft ring 31 forms a pre-break circle at the connection between the bottle cap body, and the pre-break circle is formed by a plurality of connecting bridges 32 and a leakage hole 33. The anti-theft ring 31 is formed with a plurality of blades 311 at one end away from the bottle cap body, and the blades 311 are connected between two adjacent connecting bridges 32, and the blades 311 have a supporting part, and the supporting part is used to clamp the anti-theft ring 31 to the bottle mouth. When packaging beverages, the bottle cap body enters and covers the bottle mouth from the top, and when the bottle cap is tightened toward the bottle mouth, the anti-theft structure 30 is driven to move so that the vicinity of the pre-break circle is folded, and the anti-theft ring is clamped to the bottle mouth and locked on the locking ring of the bottle mouth. When the consumer opens the beverage bottle cap for the first time, the bottle cap is rotated forcefully, and the connecting bridge 32 is pulled and disconnected, and the anti-theft ring 31 is separated from the bottle cap body as an opening mark, providing an anti-theft effect, and thereafter, the consumer can easily unscrew the bottle cap. The anti-theft structure 30 of this embodiment adopts an AB ring structure to prevent the risk of abnormal sealing. Under the premise of ensuring the anti-theft strength, the leakage hole 33 and the opening between the fan blades 311 are further weakened to reduce the gram weight without affecting the use, ensuring that it has easier screw-in resistance on the bottle mouth, and at the same time, it can leave evidence of opening after the consumer opens it.

[0046] The lightweight small-caliber bottle cap structure of this embodiment can be adapted accordingly according to two methods, such as the existing filling line screw head or the filling line screw head according to the bottle cap. After adaptation, it can effectively ensure that the finished product reduces the production of defective products during the production process. It can be adapted to the use of small-caliber bottles such as GME30.40, GME30.41, and GME30.37. The bottle cap body uses a hierarchical design and an anti-slip structure to effectively improve the top's deformation resistance and impact resistance. The side wall is further treated with glue reduction under the premise of strength balance, thereby reducing the overall weight of the bottle cap. It has good adaptability to small-caliber bottles, which can save a lot of production costs and improve efficiency during mass production.

[0047] Although certain components and embodiments of the present application have been illustrated and described, many modifications and changes (e.g., changes in size, dimensions, structure, shape and proportion of the various elements, mounting arrangements, use of materials, color, orientation, etc.) may be conceived by those skilled in the art without actually departing from the scope and spirit of the claims.

[0048] Finally, it should be noted that the above-mentioned implementation mode is only a preferred embodiment of the present utility model, and cannot be used to limit the scope of protection of the present utility model. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present utility model shall fall within the scope of protection required by the present utility model.

Claims

1. A lightweight small-caliber bottle cap structure, characterized in that: It includes a bottle cap body, wherein the bottle cap body has a top wall and a side wall; The inner surface of the side wall has a threaded fastening structure, and the threaded fastening structure is used to cooperate with the bottle mouth thread to connect; the edge of the inner surface of the top wall is provided with a sealing structure, and the sealing structure is used to be sealed and connected with the bottle mouth; The outer surface of the side wall is formed with a first rubber-reducing cutting ring; the first rubber-reducing cutting ring extends from the middle of the side wall to the outer surface of the top wall; the outer surface of the side wall is formed with an anti-skid structure, the anti-skid structure includes a first anti-skid tooth and a second anti-skid tooth, the first anti-skid tooth extends from the middle of the side wall to the outer surface of the top wall, and the second anti-skid tooth is arranged in the middle of the side wall; the first anti-skid tooth and the second anti-skid tooth are arranged in the first rubber-reducing cutting ring at intervals; The bottle cap also includes an anti-theft structure, which is connected to the bottom edge of the bottle cap body and serves as an opening mark by breaking after the initial opening.

2. A lightweight small-diameter bottle cap structure according to claim 1, characterized in that: The first anti-slip teeth and the second anti-slip teeth are both arranged perpendicular to the top wall; the length of the second anti-slip teeth does not exceed 1 / 2 of the first anti-slip teeth.

3. A lightweight small-diameter bottle cap structure according to claim 1, characterized in that: The sealing structure includes a main sealing section, an auxiliary sealing section and a secondary auxiliary sealing section; the main sealing section is an olive-shaped annular inner plug arranged on the circumference of the inner surface of the top wall; the auxiliary sealing section is an annular flange arranged on the inner surface of the connection between the side walls; the secondary auxiliary sealing section is an annular protrusion arranged between the main sealing section and the auxiliary sealing section.

4. A lightweight small-diameter bottle cap structure according to claim 3, characterized in that: The end of the auxiliary sealing segment is provided with an inwardly facing barb.

5. The lightweight small-diameter bottle cap structure according to claim 3, characterized in that: A second rubber-reducing cutting ring is formed inside the first rubber-reducing cutting ring; the second rubber-reducing cutting ring is arranged on the outer surface of the connection between the side wall and the top wall, so that the second rubber-reducing cutting ring and the auxiliary sealing section are arranged on the inner and outer surfaces of the bottle cap body relative to each other.

6. A lightweight small-diameter bottle cap structure according to claim 1, characterized in that: The thread fastening structure is a trapezoidal thread segment arranged at multiple intervals, and an exhaust hole is provided between two adjacent trapezoidal thread segments.

7. A lightweight small-diameter bottle cap structure according to claim 6, characterized in that: The threaded fastening structure comprises a clamping portion and an introduction portion, wherein the introduction portion is arranged close to the bottom of the side wall; the clamping portion is composed of a plurality of trapezoidal thread segments, and the trapezoidal thread segments of the clamping portion are of the same size; the introduction portion is composed of a plurality of trapezoidal thread segments, and the width and height of the trapezoidal thread segments of the introduction portion decrease toward the bottom of the side wall.

8. The lightweight small-diameter bottle cap structure according to claim 6, characterized in that: The inner surface of the side wall is provided with a third glue reducing groove, and a plurality of the third glue reducing grooves are arranged in a circular array on the inner surface of the side wall.

9. The lightweight small-diameter bottle cap structure according to claim 1, characterized in that: The anti-theft structure comprises an anti-theft ring, wherein a pre-breaking ring is formed at a connection between the anti-theft ring and the bottle cap body, and the pre-breaking ring is formed by a plurality of connecting bridges and leakage holes arranged at intervals.

10. A lightweight small-diameter bottle cap structure according to claim 9, characterized in that: A plurality of blades are formed on one end of the anti-theft ring away from the bottle cap body. The blades are connected between two adjacent connecting bridges. The blades have a supporting portion, and the supporting portion is used to clamp the anti-theft ring on the bottle mouth.

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