A leak-proof plastic bottle

Abstract

This utility model provides a leak-proof plastic bottle, relating to the field of plastic bottle technology. It includes a mounting base, a cap disposed on the outer side of the end of the mounting base, a fixing member disposed on the inner side of the mounting base, a venting member disposed on the inner side of the top of the cap to balance the air pressure between the mounting base and the outside environment, and a plug disposed on the inner side of the cap. The design is simple and labor-saving, facilitating daily use and maintenance. When the internal air pressure of the mounting base is too high, the air pressure pushes the limiting ring to drive the clamping claws, increasing the clamping force and achieving a tighter seal as the pressure increases. This not only prevents liquid leakage due to air pressure but also copes with pressure changes inside the bottle under different storage environments, avoiding leaks caused by pressure fluctuations due to transportation bumps, temperature changes, etc. It is widely applicable to various liquid storage and transportation scenarios.

Description

Technical Field

[0001] This utility model relates to the field of plastic bottle technology, and in particular to a leak-proof plastic bottle. Background Technology

[0002] Plastic bottles are containers made primarily of plastic. They are lightweight, not easily broken, low in cost, and easy to process. They are widely used for packaging various liquids or solids such as beverages, cosmetics, and pharmaceuticals. Their structure generally includes the bottle body, bottle mouth, and bottle cap. The shape and sealing method can be adjusted according to needs. However, improper disposal after use can easily cause white pollution. At present, the research and application of environmentally friendly biodegradable plastic bottles are gradually advancing.

[0003] A search revealed Chinese patent CN210285213U, which discloses a positioning leak-proof plastic bottle cap and a matching plastic bottle. The cap includes an outer shell, an inner ring layer inside the shell, internal threads on the inner side of the inner ring layer, and two or more positioning protrusions on the lower surface of the inner ring layer. The bottle cap includes a diagonally ring-shaped leak-proof layer. The positioning protrusions of this invention contact and position the bottle neck protrusions, preventing excessive force from damaging the plastic bottle when tightening the cap and improving the service life of both the cap and the bottle.

[0004] The aforementioned technologies rely solely on threaded or bayonet connections, which are prone to leakage due to aging and loosening of the seals caused by vibration and temperature differences. They also have poor pressure adaptability and cannot automatically strengthen the seal when the internal pressure rises, potentially causing the cap to be forced open or the liquid to overflow due to excessive pressure. This risk is even higher during bumpy transportation and in high-temperature environments. Furthermore, there is no active pressure relief mechanism, making it impossible to release internal pressure through pressing or other operations. When storing volatile liquids or substances that generate gases, the continuous accumulation of internal pressure may lead to the risk of bottle explosion. Utility Model Content

[0005] The purpose of this invention is to provide a leak-proof plastic bottle that solves the problems of the above-mentioned technologies that rely solely on threaded or snap-fit ​​connections, which are prone to leakage due to aging and loosening of the seals caused by vibration and temperature differences; poor pressure adaptability, which cannot automatically strengthen the seal when the internal pressure of the bottle increases, and may cause the bottle cap to be opened due to excessive pressure or the liquid to be squeezed out, especially under bumpy transportation and high temperature environments; and the lack of an active pressure relief mechanism, which cannot release the internal pressure through pressing or other operations, and may cause the bottle to explode when storing volatile liquids or gaseous substances, as the internal pressure continues to accumulate.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a leak-proof plastic bottle, including a mounting base, and further comprising: A cover is disposed on the outer side of the end of the mounting base; A fastener is provided on the inner side of the mounting base; An air vent is located on the inner side of the top of the cover to balance the air pressure between the mounting base and the outside environment. The plug is located on the inside of the cover.

[0007] In a preferred embodiment, the fastener includes: A limiting ring is movably disposed on the inner side of the cover; A limiting groove is formed on the inner side of the limiting ring; A sealing head is fixedly disposed on the lower surface of the limiting ring and is used to seal the mounting base; The clamping claw is rotatably disposed on the inner side of the end of the cover, and one outer end of the clamping claw is disposed on the inner side of the limiting groove.

[0008] In a preferred embodiment, a first spring is fixedly provided on the upper surface of the limiting ring, and the outer side of the end of the first spring is connected to the inner side of the top of the cover.

[0009] In a preferred embodiment, the end of the mounting base is located inside the end of the clamping claw, and the end of the clamping claw is provided with a protrusion for engaging the end of the mounting base.

[0010] In a preferred embodiment, the venting element includes: The insert rod is slidably disposed on the inner side of the middle part of the cover, and the lower surface of the insert rod is connected to the upper surface of the plug; The pressing head is fixedly installed on the outer side of the top end of the insertion rod; The first pressure relief groove is formed on the outside of the insertion rod; The second pressure relief groove is located on the inner side of the end of the sealing head.

[0011] In a preferred embodiment, a washer is fixedly provided on the upper surface of the plug, and the washer is made of rubber.

[0012] In a preferred embodiment, a second spring is fixedly provided on the upper surface of the cover, and the outer side of the top end of the second spring is connected to the lower surface of the pressing head.

[0013] In a preferred embodiment, a splash guard is fixedly provided on the upper surface of the cover.

[0014] Compared with the prior art, the advantages and positive effects of this utility model are as follows: This invention, in use, provides a basic seal by connecting the mounting base to the inner side of the cap via a threaded connection. Simultaneously, the sealing head inserts into the opening of the mounting base, forming another layer of sealing. This double-insurance sealing structure significantly reduces the risk of liquid leakage from the initial connection stage. When the end of the mounting base abuts against the limiting ring and pushes it into the inner side of the cap, it causes one end of the clamping claw to rotate, causing the other end to rotate inward and clamp the end of the mounting base. This dynamic mechanical clamping seal can adaptively adjust according to the actual connection situation, ensuring a tight, gapless seal. Furthermore, the first spring releases elastic potential energy to push out the limiting ring during disassembly, making operation simple and effortless, facilitating daily use and maintenance. When the internal air pressure of the mounting base is too high, the air pressure pushes the limiting ring, causing the clamping claw to increase the clamping force, achieving a sealing effect where the higher the pressure, the tighter the seal. This not only prevents liquid leakage due to air pressure but also copes with pressure changes inside the bottle under different storage environments, avoiding leaks caused by air pressure fluctuations due to transportation bumps, temperature changes, etc., making it widely applicable to various liquid storage and transportation scenarios. Attached Figure Description

[0015] Figure 1 A front view of a leak-proof plastic bottle provided by this utility model; Figure 2 A schematic diagram of the structure of a leak-proof sealing head and clamping claw in a plastic bottle provided by this utility model; Figure 3 A schematic diagram of the structure of a press head and splash guard in a leak-proof plastic bottle provided by this utility model; Figure 4 A cross-sectional view of a leak-proof plastic bottle cap provided by this utility model; Figure 5 A schematic diagram of the structure of a leak-proof plastic bottle insert and a press head provided by this utility model; Figure 6 A schematic diagram of the limiting groove and sealing head in a leak-proof plastic bottle provided by this utility model; Figure 7 This utility model provides a schematic diagram of the structure of a base installed in a leak-proof plastic bottle.

[0016] Legend: 1. Mounting base; 2. Cover; 201. Limiting ring; 202. Limiting groove; 203. Sealing head; 204. Clamping claw; 205. First spring; 3. Plug; 301. Insert rod; 302. Pressing head; 303. First pressure relief groove; 304. Second pressure relief groove; 305. Washer; 306. Second spring; 307. Splash guard. Detailed Implementation

[0017] 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.

[0018] Example 1 Please see Figures 1 to 7 This embodiment provides a leak-proof plastic bottle that facilitates fixing the opening of the mounting base 1 to prevent leakage. The specific idea is as follows: The leak-proof plastic bottle includes a mounting base 1 and a cap 2. In addition, the leak-proof plastic bottle also includes: a clamping claw 204 rotatably provided on the inner side of the cap 2; the end of the mounting base 1 is threadedly connected to the inner side of the end of the cap 2; the end of the clamping claw 204 is provided with a protrusion, which can be snapped into the end of the mounting base 1 to fix the cap 2 to the end of the mounting base 1.

[0019] In order to achieve the clamping function of the clamping claw 204, this embodiment provides a fixing component that can clamp the clamping claw 204 to the end of the mounting base 1. At the same time, the greater the air pressure inside the mounting base 1, the greater the clamping force of the clamping claw 204, thereby achieving the sealing function of the mounting base 1.

[0020] The fasteners include: a limiting ring 201 movably disposed on the inner side of the cover 2, with a limiting groove 202 on the inner side of the limiting ring 201 for driving the end of the clamping claw 204 to rotate, thereby causing the other end of the clamping claw 204 to rotate inward; a sealing head 203 is fixedly disposed on the lower surface of the limiting ring 201 for inserting into the opening of the mounting base 1 to seal the mounting base 1; and a first spring 205 is fixedly connected to the upper surface of the limiting ring 201, with the outer side of the top end of the first spring 205 fixedly connected to the inner side of the top end of the cover 2 for supporting the limiting ring 201.

[0021] In the specific implementation process: When using the device, the user can connect the end of the mounting base 1 to the inner side of one end of the cover 2 via a threaded connection. Simultaneously, the sealing head 203 is inserted into the opening of the mounting base 1, sealing the opening of the mounting base 1. At the same time, the end of the mounting base 1 will abut against one side of the limiting ring 201, pushing the limiting ring 201 into the inner side of the cover 2. At this time, the limiting ring 201 will cause one end of the clamping claw 204 to rotate. While one end of the clamping claw 204 rotates, its other end will rotate inwards, thereby driving... The end of the clamping claw 204 clamps towards the center, and the interface seals the end of the mounting base 1. When the device is disassembled, the first spring 205 releases elastic potential energy to push out the limiting ring 201. At the same time, when the internal air pressure of the mounting base 1 is too high, the internal air pressure will push the limiting ring 201, thereby applying a force to the limiting ring 201 to move towards the inside of the cover 2, which in turn causes the clamping claw 204 to rotate towards the center and inward, making the clamping claw 204 clamp the mounting base 1 with greater force.

[0022] Example 2 Please see Figures 1 to 7 This embodiment provides a leak-proof plastic bottle that facilitates pressure relief of the mounting base 1. The specific concept is as follows: Traditional devices lack pressure relief functionality and are typically unscrewed directly, leading to easy splashing of liquid accumulated at the opening. This leak-proof plastic bottle includes a mounting base 1 and a cap 2. Furthermore, the leak-proof plastic bottle also includes: a clamping claw 204 rotatably mounted on the inner side of the cap 2; a threaded connection between the end of the mounting base 1 and the inner side of the end of the cap 2; a protrusion at the end of the clamping claw 204 that can engage with the end of the mounting base 1 to fix the cap 2 to the end of the mounting base 1; and an insertion rod 301 on the inner side of the cap 2 for depressurizing the inner side of the mounting base 1.

[0023] In order to achieve the pressure relief function of the insertion rod 301, this embodiment provides a venting component. By pressing the insertion rod 301, the insertion rod 301 can be moved toward the inside of the mounting base 1, thereby releasing the gas inside the mounting base 1.

[0024] The venting component includes: a rod 301 slidably connected to the inner side of the cover 2; a pressing head 302 fixedly installed on the outer side of the top end of the rod 301; a plug 3 fixedly installed on the outer side of the bottom end of the rod 301; the plug 3 contacting the inner side of the sealing head 203; a first pressure relief groove 303 opened on the outer side of the rod 301; a second pressure relief groove 304 opened on the inner side of the sealing head 203 for connecting the mounting base 1 with the outside; a washer 305 fixedly installed on the upper surface of the plug 3 for increasing sealing performance; a second spring 306 fixedly connected to the upper surface of the cover 2; the top end of the second spring 306 fixedly connected to the lower surface of the pressing head 302; and a splash guard 307 fixedly connected to the upper surface of the cover 2.

[0025] In the specific implementation process, when using the device, the user can press the insertion rod 301 by pressing the pressing head 302, thereby moving the plug 3 toward the position of the sealing head 203. At the same time, the second spring 306 is compressed and stored elastic potential energy. At this time, as the plug 3 gradually moves, the gas inside the mounting base 1 flows through the second pressure relief groove 304 to the inside of the cavity formed by the plug 3 and the sealing head 203. At this time, the gas flows to the outside through the sealing head 203. The anti-splash ring 307 can prevent liquid from splashing to the outside. After the pressure is released, the pressing head 302 is released, the elastic potential energy of the second spring 306 is released, and the pressing head 302 is pushed to move upward, causing the upper surface of the plug 3 to contact the lower surface of the limiting ring 201. The sealing performance can be increased by the washer 305.

[0026] Working principle: Based on Embodiment 1, the mounting base 1 is connected to the inner side of the cover 2 by a threaded connection, which provides a basic seal. At the same time, the sealing head 203 is inserted into the opening of the mounting base 1 to form another sealing line. The double-insurance sealing structure greatly reduces the risk of liquid leakage from the initial connection stage. When the end of the mounting base 1 abuts against the limiting ring 201 and pushes it into the inside of the cover 2, it drives one end of the clamping claw 204 to rotate, causing the other end to rotate inward and clamp the end of the mounting base 1. This dynamic mechanical clamping seal can adaptively adjust according to the actual connection situation to ensure a tight and gapless seal. In addition, the first spring 205 is set to release elastic potential energy to push out the limiting ring 201 during disassembly, making the operation simple and labor-saving, and convenient for daily use and maintenance. When the internal air pressure of the mounting base 1 is too high, the air pressure pushes the limiting ring 201 to drive the clamping claw 204 to increase the clamping force, achieving a sealing effect where the greater the pressure, the tighter the seal. This not only prevents liquid leakage due to air pressure, but also copes with changes in bottle pressure under different storage environments, avoiding leakage caused by air pressure fluctuations due to transportation bumps, temperature changes, etc. It is widely applicable to various liquid storage and transportation scenarios.

[0027] Based on Embodiment 2, by pressing the insertion rod 301 with the pressing head 302, the plug 3 moves towards the sealing head 203 and compresses the second spring 306 to store elastic potential energy. This operation achieves the active pressure relief function. Gas inside the mounting base 1 flows into the cavity formed by the plug 3 and the sealing head 203 through the second pressure relief groove 304 and is then discharged through the sealing head 203. The entire process effectively releases excessive pressure inside the bottle, avoiding dangerous situations such as liquid spillage or bottle cap breakage due to excessive pressure, thus improving safety. The presence of the splash guard 307 further prevents liquid from splashing to the outside, protecting users and the surrounding environment from liquid contamination, and is especially suitable for storing corrosive, staining, or strongly odorous liquids. After the pressure is released, the second spring 306 releases its elastic potential energy to push the pressing head 302 upward, causing the plug 3 to contact the limiting ring 201. Together with the gasket 305, the sealing is increased, so that the plastic bottle can quickly return to a tight seal after the pressure is released, preventing external air and moisture from entering the bottle and affecting the quality of the liquid, and also preventing subsequent leakage of the liquid inside the bottle.

[0028] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. A liquid-tight plastic bottle comprising a mounting base (1), characterized in that, Also includes: The cover (2) is disposed on the outer side of the end of the mounting base (1); A fastener is provided on the inner side of the mounting base (1); An air vent is provided on the inner side of the top of the cover (2) to balance the air pressure between the mounting base (1) and the outside. The plug (3) is located on the inside of the cover (2).

2. A liquid-tight plastic bottle according to claim 1, characterized in that The fastener includes: A limiting ring (201) is movably disposed on the inner side of the cover (2); A limiting groove (202) is formed on the inner side of the limiting ring (201); A sealing head (203) is fixedly disposed on the lower surface of the limiting ring (201) for sealing the mounting base (1); The clamping claw (204) is rotatably disposed on the inner side of the end of the cover (2), and one end of the clamping claw (204) is disposed on the inner side of the limiting groove (202).

3. A liquid-tight plastic bottle according to claim 2, characterized in that A first spring (205) is fixedly provided on the upper surface of the limiting ring (201), and the outer side of the end of the first spring (205) is connected to the inner side of the top of the cover (2).

4. The liquid-tight plastic bottle according to claim 2, wherein The end of the mounting base (1) is located inside the end of the clamping claw (204), and the end of the clamping claw (204) is provided with a protrusion for engaging the end of the mounting base (1).

5. A liquid-tight plastic bottle according to claim 4, characterized in that The venting component includes: Insert rod (301) is slidably disposed on the inner side of the middle part of the cover (2), and the lower surface of the insert rod (301) is connected to the upper surface of the plug (3); The pressing head (302) is fixedly disposed on the outer side of the top end of the insertion rod (301); The first pressure relief groove (303) is provided on the outside of the insert rod (301); The second pressure relief groove (304) is located on the inner side of the end of the sealing head (203).

6. A liquid-tight plastic bottle according to claim 5, characterized in that A washer (305) is fixedly provided on the upper surface of the plug (3), and the washer (305) is made of rubber.

7. A liquid-tight plastic bottle according to claim 5, wherein A second spring (306) is fixedly provided on the upper surface of the cover (2), and the outer side of the top end of the second spring (306) is connected to the lower surface of the pressing head (302).

8. A liquid-tight plastic bottle according to claim 5, wherein A splash guard (307) is fixedly provided on the upper surface of the cover (2).

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