Fixing structure for bottle cap and bottle neck

Abstract

The utility model relates to the technical field of plastic bottles, and discloses a fixing structure for a bottle cap and a bottle neck, which comprises the bottle neck and the bottle cap, the bottle cap is in threaded connection with the bottle neck, and an aluminum foil sealing sheet is adhered to the upper port of the bottle neck. Due to the fact that the protruding block is arranged on one side of the bottle neck and the protruding plastic soft tooth is correspondingly arranged on the same horizontal position of the inner wall of the bottle cap, when the bottle cap is screwed down, the bottle cap needs to be aligned and buckled on the bottle opening to rotate downwards, and the protruding plastic soft tooth on the inner wall of the bottle cap also descends along with rotation of the bottle cap at the moment. When the bottle cap is completely covered on the bottle neck and is tightened at last, the plastic soft teeth of the bottle cap just slide through the convex blocks and then are staggered and sound, and the bottle cap is tightened on the bottle neck without being tightened again, so that the problem of liquid leakage caused by the fact that the bottle cap is not tightened can be avoided, and meanwhile, the problem of damage to threads of the bottle cap caused by excessive tightening can also be avoided; and the problem of inconvenience in uncovering caused by excessive tightening can be avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of plastic bottle, specifically is a bottle cap and bottle neck's fixed structure. BACKGROUND

[0002] The plastic bottle is mainly made of polyethylene or polypropylene and a plurality of organic solvents. The plastic bottle uses polyester (PET), polyethylene (PE) and polypropylene (PP) as raw materials, adds corresponding organic solvents, and is formed into a plastic container through blowing, extrusion blowing or injection molding after high-temperature heating. The plastic container is mainly used for beverage, food, pickles, honey, dried fruit, edible oil, agricultural and veterinary drug liquid or solid disposable plastic packaging containers. When the plastic bottle is opened for use, a tool is generally used to cut the sealing piece adhered to the bottle mouth, and a few use the pull ear structure.

[0003] According to the bottle cap and bottle neck fixing structure disclosed in Chinese patent No. CN220148031U, a bottle cap and bottle neck fixing structure is provided. The bottle cap and bottle neck fixing structure comprises a bottle body, a bottle neck assembly arranged on the top of the bottle body, a bottle neck, a bottle mouth and a three-tooth outer thread, a bottle cap assembly arranged on the outside of the bottle neck, a bottle cap, a three-tooth inner thread, a sealing piece and a pull ear. When the bottle neck assembly and the bottle cap assembly are combined by screwing, there is a shrinkage part between the bottle mouth and the three-tooth outer thread. After the bottle cap is screwed into place, the pull ear is pressed into the shrinkage part, so that the pull ear is not subjected to torsion. This is beneficial to the user to quickly open the bottle cap. The three-tooth outer thread and the three-tooth inner thread cooperate with each other to complete the screwing combination of the bottle cap and the bottle neck. Only one or two turns of the bottle cap are needed to complete the combination with the bottle neck. This improves the cap installation speed of the bottle cap during production and assembly, and prevents the cap from being skewed. This improves the overall efficiency of plastic bottle processing.

[0004] However, the existing plastic bottle has the problems of liquid leakage caused by the user not tightening the bottle cap, excessive tightening of the bottle cap affecting the service life of the thread, and inconvenience in unscrewing the bottle cap next time. Therefore, a bottle cap and bottle neck fixing structure is proposed to solve the above problems. UTILITY MODEL CONTENTS

[0005] The technical problem to be solved by the utility model is to provide a bottle cap and bottle neck fixing structure to solve the problems in the prior art.

[0006] To solve the above technical problems, the utility model adopts the following technical scheme: a bottle cap and bottle neck fixing structure, comprising a bottle neck and a bottle cap, the bottle cap is connected to the bottle neck by screwing, an aluminum foil sealing piece is attached to the upper end of the bottle neck, and a pull ear is fixedly connected to the aluminum foil sealing piece.

[0007] A protrusion is fixedly connected to the bottle neck, and a plastic soft tooth is fixedly connected to the inner wall of the bottle cap.

[0008] The bottom of the bottle cap is provided with a sealing ring groove, and a sealing insert is fixedly connected to the bottle neck.

[0009] Preferably, the sealing ring is inserted into the inside of the sealing ring groove. The sealing performance between the bottle cap and the bottle neck can be improved by setting the sealing ring and the sealing ring groove.

[0010] Preferably, the bottle neck is provided with external threads, and the inner wall of the bottle cap is provided with internal threads. The bottle cap can be threadedly connected to the bottle neck by the external and internal threads.

[0011] The present invention adopts the above technical solution, which can bring the following beneficial effects:

[0012] 1. The cap and neck fixing structure uses a protrusion on one side of the neck, and a corresponding raised plastic tooth on the inner wall of the cap at the same horizontal position. When tightening the cap, the cap needs to be aligned with the bottle mouth and rotated downwards. At this time, the raised plastic tooth on the inner wall of the cap also descends with the rotation of the cap until the cap is completely closed on the neck. When tightening one last time, the plastic tooth slides over the protrusion and then offsets, making a click sound. At this point, the cap is properly tightened on the neck and no further tightening is needed. This avoids the problem of liquid leakage due to an untightened cap, as well as the problem of damage to the cap threads due to over-tightening, and the problem of inconvenience in opening the cap due to excessive tightening.

[0013] 2. The fixing structure between the bottle cap and the bottle neck is designed with a sealing ring groove and a sealing insert ring. When the bottle cap is tightened, the sealing insert ring will be inserted into the inside of the sealing ring groove to form a seal, which improves the sealing performance of the bottle cap and the bottle neck. Attached Figure Description

[0014] Figure 1 This is a schematic cross-sectional view of the present invention.

[0015] Figure 2 This is a top view sectional structural diagram of the present invention;

[0016] Figure 3 for Figure 2 Enlarged schematic diagram of the structure at point A in the middle.

[0017] In the diagram: 1. Bottle neck; 2. Bottle cap; 3. Aluminum foil seal; 4. Pull lug; 5. Protrusion; 6. Plastic soft tooth; 7. Sealing ring groove; 8. Sealing insert ring; 9. Internal thread; 10. External thread. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0021] Please see Figures 1-3 The technical solution of this utility model is: a fixing structure for a bottle cap and a bottle neck, including a bottle neck 1 and a bottle cap 2, the bottle cap 2 being threadedly connected to the bottle neck 1, an aluminum foil sealing sheet 3 being glued to the upper end of the bottle neck 1, and a pull tab 4 being fixedly connected to the aluminum foil sealing sheet 3.

[0022] A protrusion 5 is fixedly connected to the neck 1, and a plastic soft tooth 6 is fixedly connected to the inner wall of the bottle cap 2. By setting a protrusion 5 on one side of the neck 1, a corresponding protruding plastic soft tooth 6 is set at the same horizontal position on the inner wall of the bottle cap 2. When tightening the bottle cap 2, the bottle cap 2 needs to be aligned with the bottle mouth and rotated downwards. At this time, the protruding plastic soft tooth 6 on the inner wall of the bottle cap 2 also descends with the rotation of the bottle cap 2 until the bottle cap 2 is completely closed on the neck 1. When tightening it one last time, the plastic soft tooth 6 just slides past the protrusion 5 and then moves away, making a click sound. At this time, the bottle cap 2 is just tightened on the neck 1, and no further tightening is required. This can avoid the problem of liquid leakage due to the bottle cap 2 not being tightened properly. It can also avoid the problem of damage to the threads of the bottle cap 2 due to over-tightening, and it can also avoid the problem of inconvenience in opening the cap due to over-tightening.

[0023] The bottom of the bottle cap 2 is provided with a sealing ring groove 7, and a sealing ring 8 is fixedly connected to the bottle neck 1. By setting the sealing ring groove 7 and the sealing ring 8, when the bottle cap 2 is tightened, its sealing ring 8 will be inserted into the inside of the sealing ring groove 7 to form a seal, which improves the sealing performance of the bottle cap 2 and the bottle neck 1.

[0024] The sealing ring 8 is inserted into the sealing ring groove 7. The sealing performance of the bottle cap 2 and the bottle neck 1 can be improved by the arrangement of the sealing ring 8 and the sealing ring groove 7.

[0025] The bottle neck 1 has an external thread 10, and the inner wall of the bottle cap 2 has an internal thread 9. The bottle cap 2 can be threadedly connected to the bottle neck 1 by the external thread 10 and the internal thread 9.

[0026] Working principle: A protrusion 5 is set on one side of the bottle neck 1. Correspondingly, a raised plastic soft tooth 6 is set at the same horizontal position on the inner wall of the bottle cap 2. When tightening the bottle cap 2, the bottle cap 2 needs to be aligned with the bottle mouth and rotated downwards. At this time, the raised plastic soft tooth 6 on the inner wall of the bottle cap 2 also descends with the rotation of the bottle cap 2 until the bottle cap 2 is completely covered on the bottle neck 1. When tightening it one last time, the plastic soft tooth 6 just slides over the protrusion 5 and then offsets, making a click sound. At this time, the bottle cap 2 is just tightened on the bottle neck 1, and no further tightening is required. This can avoid the problem of liquid leakage due to the bottle cap 2 not being tightened properly. It can also avoid the problem of damage to the threads of the bottle cap 2 due to over-tightening, and it can also avoid the problem of inconvenience in opening the cap due to over-tightening. By setting a sealing ring groove 7 and a sealing insert ring 8, when the bottle cap 2 is tightened, its sealing insert ring 8 will be inserted into the sealing ring groove 7 to form a seal, which improves the sealing performance of the bottle cap 2 and the bottle neck 1.

[0027] It should be noted that the pull tab 4 in this application is also made of aluminum foil. The pull tab 4 and the aluminum foil sealing sheet 3 are integrated and are relatively thin. When the bottle cap 2 is rotated, its plastic soft teeth 6 will not come into contact with the pull tab 4.

[0028] This utility model provides a fixing structure for a bottle cap and bottle neck. There are many methods and approaches to implement this technical solution. The above description is only a preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model. All components not explicitly stated in this embodiment can be implemented using existing technology.

Claims

1. A bottle neck and cap fixing structure comprising a bottle neck (1) and a bottle cap (2), characterized in that: Said bottle cap (2) is screwed on the bottle neck (1), the upper end of the bottle neck (1) is bonded with an aluminum foil sealing sheet (3), and the aluminum foil sealing sheet (3) is fixedly connected with a pull ear (4); A convex block (5) is fixedly connected on the bottle neck (1), and plastic soft teeth (6) are fixedly connected on the inner wall of the bottle cap (2); A sealing ring groove (7) is arranged at the bottom of the bottle cap (2), and a sealing plug ring (8) is fixedly connected on the bottle neck (1).

2. The bottle cap and bottle neck fixing structure according to claim 1, characterized in that: The sealing plug ring (8) is inserted into the sealing ring groove (7).

3. The bottle cap and bottle neck fixing structure according to claim 1, characterized in that: An external thread (10) is arranged on the bottle neck (1), and an internal thread (9) is arranged on the inner wall of the bottle cap (2).

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