Pressurized anti-suck-back cosmetic container

Abstract

The utility model discloses a pressurized anti-suck-back cosmetic container which comprises a main shell, a one-way discharging structure and an elastic extrusion bag with an air suction port are arranged on the main shell, a piston is arranged in the main shell between the elastic extrusion bag and the one-way discharging structure in a sliding mode, and the one-way discharging structure is arranged on the main shell. The two sides of the main shell are separated in an airtight mode through the piston, an air outlet of the elastic extrusion bag faces the piston, a one-way air inlet assembly for feeding air to the side of the piston is arranged between the elastic extrusion bag and the piston, and a closed space is formed between the one-way air inlet assembly and the piston. The pressurized anti-suck-back cosmetic container can effectively prevent external air from entering the cosmetic container to pollute cosmetics in the cosmetic container during use, and effectively avoid the problem that the piston cannot be pushed by air pressure generated by deformation of the elastic extrusion bag due to overhigh viscosity of the contents.

Description

Technical Field

[0001] This utility model belongs to the field of cosmetic container technology, specifically a pressurized anti-backflow cosmetic container. Background Technology

[0002] In the cosmetics industry, the functional design of containers is crucial for ensuring product quality and user experience. However, traditional cosmetic containers commonly suffer from contamination of contents due to contact with air during use, a problem that has become a key factor restricting product safety and lifespan.

[0003] Currently, the mainstream cosmetic containers on the market mainly adopt designs such as wide-mouth bottles, pump bottles, and tubes. For example, wide-mouth bottles require users to directly scoop out the contents with their fingers or tools. This operation inevitably exposes a large area of ​​the cream inside the jar to the air, allowing airborne microorganisms (such as bacteria and mold) and suspended particulate matter to enter the container, causing secondary contamination.

[0004] In related technologies, some extrusion-type cosmetic containers are equipped with a one-way valve at the extrusion port, a piston inside the container, and an elastic squeeze bladder with air holes at the tail. By sealing the air holes of the elastic squeeze bladder during extrusion and opening them when released, backflow prevention is achieved. Although this design can suppress air backflow and meet the needs of some cosmetics, when extruding contents such as foundation, face cream, and toothpaste with high viscosity, the elastic squeeze bladder has a limited range of change. Especially after a certain amount of contents has been extruded and there is a large space between the piston and the elastic squeeze bladder, the air pressure generated by the elastic squeeze bladder only increases the air pressure between the piston and the elastic squeeze bladder, but is not enough to move the piston and extrude the contents. Utility Model Content

[0005] This invention addresses the shortcomings of existing technologies by providing a pressurized anti-backflow cosmetic container. This pressurized anti-backflow cosmetic container can effectively prevent outside air from entering the cosmetic container during use and contaminating the cosmetic contents. It also effectively avoids the problem that the piston cannot be pushed by the air pressure generated by the elastic compression of the bladder due to the high viscosity of the contents.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a pressurized anti-backflow cosmetic container, comprising a main shell, wherein the main shell is provided with a one-way discharge structure and an elastic squeeze bladder with an air intake, a piston is slidably disposed within the main shell between the elastic squeeze bladder and the one-way discharge structure, the piston airtightly separating the two sides of the main shell, the air outlet of the elastic squeeze bladder faces the piston, and a one-way air intake assembly for air intake towards the piston is disposed between the elastic squeeze bladder and the piston, forming a sealed space between the one-way air intake assembly and the piston. When using this pressurized, anti-backflow cosmetic container, hold the main body and press the elastic squeeze bladder. Simultaneously, press the bladder and block the air intake. This forces the gas inside the bladder into the sealed space between the one-way air intake component and the piston. If the pressure within this sealed space is sufficient to push the piston, it will push the cosmetic contents of the main body out through the one-way discharge structure. When the elastic squeeze bladder is released, because the one-way discharge structure restricts air intake, gas will not enter the main body from the one-way discharge structure, so the piston will not move. At this time, the air intake of the elastic squeeze bladder opens, and the bladder will draw in air and automatically reset. If, due to the high viscosity of the contents, one press of the elastic squeeze bladder is insufficient to push the piston, multiple presses and releases of the elastic squeeze bladder are performed. Due to the function of the one-way air intake component, air is confined within the sealed space between the component and the piston. After multiple gas injections, the increased air pressure within the sealed space pushes the piston to move.

[0007] In the above technical solution, preferably, the one-way air intake assembly includes a positioning sleeve fixed to the inner wall of the main housing. The positioning sleeve has a central hole, and an elastic protrusion protruding towards the piston side is provided in the central hole. An air outlet gap is provided on the elastic protrusion. This structure facilitates one-way air intake. When the air pressure in the sealed space is not excessively high, the gas can only move from the elastic compression bladder side towards the piston side.

[0008] In the above technical solution, preferably, the elastic compression bladder is provided with an annular limiting groove, and the annular limiting part extending inward from the tail of the main housing is engaged in the annular limiting groove. The elastic protrusion is located on the elastic cap, and the elastic cap is sandwiched between the positioning sleeve and the elastic compression bladder. This structure facilitates the positioning and assembly of the elastic protrusion, and also allows the positioning sleeve to tighten the elastic cap, ensuring the sealing of the closed space formed between the one-way air intake assembly and the piston.

[0009] In the above technical solution, preferably, a guide sleeve is provided on one side of the elastic compression bladder on the main housing, and a pressing cap is movably disposed inside the guide sleeve. The bottom of the pressing cap has a contact surface that seals the air intake when pressed down. This structure allows the elastic compression bladder to be pushed by pressing the pressing cap, resulting in a more aesthetically pleasing appearance. When the pressing cap is pressed, its bottom contact surface blocks the air intake. When the pressing cap is released, an air intake gap is created between the contact surface and the air intake, allowing the elastic compression bladder to return to its original position.

[0010] In the above technical solution, preferably, the pressing cap includes a pressing member and an abutting member. The pressing member is provided with a radially extending second limiting portion, and the abutting member is provided with a radially extending third limiting portion. The pressing member and the abutting member are fastened together from both sides of the guide sleeve to form the pressing cap. This structure prevents the pressing cap from detaching from the guide sleeve and allows for easy assembly of the pressing cap onto the guide sleeve.

[0011] In the above technical solution, preferably, the bottom of the pressing cap is provided with a guide rod that is inserted into the air inlet to guide the air inlet's movement. By providing a guide rod at the bottom of the pressing cap, the air inlet always moves up and down along the guide rod during the downward compression deformation of the elastic compression bladder, thereby ensuring that the air inlet is always blocked by the contact surface and avoiding the problem of the air inlet deflecting when the elastic compression bladder is pressed down, thus preventing the piston from moving downward.

[0012] In the above technical solution, preferably, the unidirectional discharge structure includes a positioning element, which has a flow port and an elastic sealing sheet on the discharge side. The elastic sealing sheet covers the discharge side of the flow port. This unidirectional discharge structure achieves low-cost unidirectional sealing by sealing the flow port with the elastic sealing sheet when there is negative pressure inside the main housing.

[0013] In the above technical solution, preferably, the positioning member is provided with a positioning port, and the elastic sealing sheet is connected to a positioning rod that passes through the positioning port. The end of the positioning rod located on the feed side of the flow port extends radially outward and is provided with a first limiting part. This structure allows the elastic sealing sheet to be conveniently positioned and covered on the discharge side of the flow port, making installation relatively convenient.

[0014] In the above technical solution, preferably, the positioning member has a discharge cover with a discharge hole on its outer side. The discharge cover is fastened to the main housing. The positioning member has a limiting ring arranged radially outward. The outer side of the unidirectional discharge structure abuts against the discharge cover, and the inner side of the limiting ring abuts against the main housing. The positioning member has a first annular extension on the side facing the discharge cover, and a second annular extension on the inner side of the discharge cover. The outer wall of the first annular extension is fastened to the inner wall of the second annular extension. This structure protects the unidirectional discharge structure from accidental opening of the flow port due to contact with the human body, preventing external air from entering the main housing. It also allows the unidirectional discharge structure to be integrated with the discharge cover, facilitating the installation of the unidirectional discharge structure and the discharge cover after cosmetic filling.

[0015] Compared with the prior art, this utility model has the following beneficial effects: When using this pressurized anti-backflow cosmetic container, hold the main shell and press the elastic squeeze bladder. While pressing the elastic squeeze bladder, block the air intake port, so that the gas in the elastic squeeze bladder is squeezed into the sealed space between the one-way air intake component and the piston. If the pressure in the sealed space is sufficient to push the piston, the piston is pushed, squeezing the cosmetic contents of the main shell out from the one-way discharge structure. When the elastic squeeze bladder is released, because the one-way discharge structure restricts air intake, the gas will not enter the main shell from the one-way discharge structure, so the piston will not move. At this time, the air intake port of the elastic squeeze bladder is opened, and the elastic squeeze bladder will draw air from the air intake port and automatically reset. If the viscosity of the contents is high, one squeeze of the elastic squeeze bladder is not enough to push the piston, so the operation of squeezing and releasing the elastic squeeze bladder is repeated. Due to the function of the one-way air intake component, the air can be confined in the sealed space between the one-way air intake component and the piston. After squeezing in gas multiple times, the air pressure in the sealed space increases, which can push the piston to move. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this utility model.

[0017] Figure 2 This is a cross-sectional structural diagram of Embodiment 1 of the present invention.

[0018] Figure 3 for Figure 2 A magnified view of a portion of the image.

[0019] Figure 4 This is an exploded structural diagram of Embodiment 1 of the present invention.

[0020] Figure 5 This is a schematic diagram showing the disassembly of the positioning element and the elastic sealing sheet in Embodiment 1 of this utility model.

[0021] Figure 6 This is a schematic diagram of the elastic compression bladder in Embodiment 1 of this utility model.

[0022] Figure 7 This is a cross-sectional structural diagram of Embodiment 2 of the present invention.

[0023] Figure 8 This is a cross-sectional structural diagram of Embodiment 3 of the present invention. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments: See below Figures 1 to 6 A pressurized anti-backflow cosmetic container includes a main shell 1. The main shell 1 is provided with a one-way discharge structure 2 and an elastic squeeze bladder 4 with an air intake 3. The elastic squeeze bladder 4 is corrugated. A piston 5 is slidably disposed inside the main shell 1 between the elastic squeeze bladder 4 and the one-way discharge structure 2. The piston 5 airtightly separates the two sides of the main shell 1. The air outlet of the elastic squeeze bladder 4 faces the piston 5. A one-way air intake assembly 100 for air intake to the piston 5 is disposed between the elastic squeeze bladder 4 and the piston 5. A sealed space is formed between the one-way air intake assembly 100 and the piston 5. When using this pressurized, anti-backflow cosmetic container, hold the main shell 1 and press the elastic squeeze bladder 4. Pressing the elastic squeeze bladder 4 simultaneously blocks the air intake 3, forcing the gas inside the elastic squeeze bladder 4 into the sealed space between the one-way air intake assembly 100 and the piston 5. If the pressure within this sealed space is sufficient to push the piston 5, the piston 5 will push, squeezing the cosmetic contents of the main shell 1 out through the one-way discharge structure 2. When the elastic squeeze bladder 4 is released, the gas will not enter through the one-way discharge structure 2 because it restricts air intake. When the piston 5 moves to the main housing 1, the piston 5 will not move. At this time, the air intake 3 of the elastic compression bladder 4 is opened, and the elastic compression bladder 4 will draw air from the air intake 3 and automatically reset. If the elastic compression bladder 4 is not strong enough to push the piston 5 with one squeeze due to the high viscosity of the contents, the operation of squeezing and releasing the elastic compression bladder 4 will be performed multiple times. Due to the function of the one-way air intake component 100, the air can be confined in the sealed space between the one-way air intake component 100 and the piston 5. After the gas is squeezed in multiple times, the air pressure in the sealed space increases, which can push the piston 5 to move.

[0025] In this embodiment, the one-way air intake assembly 100 includes a positioning sleeve 101 fixed to the inner wall of the main housing 1. The positioning sleeve 101 has a central hole 102, and an elastic protrusion 103 protruding towards the piston 5 is provided inside the central hole 102. An air outlet gap 104 is provided on the elastic protrusion 103. This structure facilitates one-way air intake. When the air pressure in the sealed space is not excessively high, the gas can only move from the elastic compression bladder 4 side towards the piston 5.

[0026] In this embodiment, the elastic compression bladder 4 is provided with an annular limiting groove 22, and the annular limiting part 23 extending inward from the tail of the main housing 1 is engaged in the annular limiting groove 22. The elastic protrusion 103 is located on the elastic cap 105, and the elastic cap 105 is sandwiched between the positioning sleeve 101 and the elastic compression bladder 4. This structure facilitates the positioning and assembly of the elastic protrusion 103, and also allows the positioning sleeve 101 to press the elastic cap 105 tightly, ensuring the sealing of the closed space formed between the one-way air intake assembly 100 and the piston 5. In this embodiment, the elastic cap 105 is made of silicone material.

[0027] In this embodiment, a guide sleeve 6 is provided on one side of the elastic compression bladder 4 on the main housing 1. A pressing cap 7 is movably disposed inside the guide sleeve 6. The bottom of the pressing cap 7 has a contact surface 29 that seals the air intake 3 when pressed down. This structure allows the elastic compression bladder 4 to be pushed by pressing the pressing cap 7, resulting in a more aesthetically pleasing appearance. When the pressing cap 7 is pressed, its bottom contact surface 29 blocks the air intake 3. When the pressing cap 7 is released, an air intake gap is created between the contact surface 29 and the air intake 3, allowing the elastic compression bladder 4 to return to its original position.

[0028] In this embodiment, the pressing cap 7 includes a pressing member 24 and an abutting member 25. The pressing member 24 is provided with a radially extending second limiting portion 26, and the abutting member 25 is provided with a radially extending third limiting portion 27. The pressing member 24 and the abutting member 25 are fastened together from both sides of the guide sleeve 6 to form the pressing cap 7. This structure prevents the pressing cap 7 from detaching from the guide sleeve 6 and allows for easy assembly of the pressing cap 7 onto the guide sleeve 6.

[0029] In this embodiment, a guide rod 28 is provided at the bottom of the pressing cap 7 to guide the air inlet 3 to move up and down. By providing the guide rod 28 at the bottom of the pressing cap 7, the air inlet 3 always moves up and down along the guide rod 28 during the downward compression deformation of the elastic compression bladder 4, thereby ensuring that the air inlet 3 can always be blocked by the contact surface 29, avoiding the problem that the air inlet 3 deflects when the elastic compression bladder 4 is pressed down, thus preventing the piston 3 from moving down.

[0030] In this embodiment, the unidirectional discharge structure 2 includes a positioning member 8, which has a flow port 9 and an elastic sealing sheet 10 on the discharge side. The elastic sealing sheet 10 covers the discharge side of the flow port 9. This unidirectional discharge structure seals the flow port 9 with the elastic sealing sheet 10. When there is negative pressure inside the main housing 1, the elastic sealing sheet 10 seals the flow port 9, which can achieve low-cost unidirectional sealing.

[0031] In this embodiment, the positioning member 8 is provided with a positioning port 11, and the elastic sealing sheet 10 is connected to a positioning rod 12 that passes through the positioning port 11. The end of the positioning rod 12 located on the feed side of the flow port 9 extends radially outward and is provided with a first limiting part 13. This structure makes it convenient to position the elastic sealing sheet 10 on the discharge side of the flow port 9, and the installation is relatively convenient.

[0032] In this embodiment, a discharge cover 15 with a discharge hole 14 is provided on the outer side of the positioning member 8. The discharge cover 15 is fastened to the main housing 1. A limiting ring 16 is provided radially outward on the positioning member 8. The outer side of the one-way discharge structure 2 abuts against the discharge cover 15, and the inner side of the limiting ring 16 abuts against the main housing 1. A first annular extension 17 is provided on the side of the positioning member 8 facing the discharge cover 15, and a second annular extension 18 is provided on the inner side of the discharge cover 15. The outer wall of the first annular extension 17 is fastened to the inner wall of the second annular extension 18. This structure can protect the one-way discharge structure 2 by the discharge cover 15, preventing the one-way discharge structure 2 from accidentally opening the flow port 9 and allowing external air to enter the main housing 1 by contact with the human body. It also allows the one-way discharge structure 2 to be connected to the discharge cover 15 as one unit, making it convenient to install the one-way discharge structure 2 and the discharge cover 15 after filling cosmetics.

[0033] See Figure 7 Example 2 differs from Example 1 only in that the bottom of the pressing cap 7 is not provided with a guide rod 28, and the functions of the rest of the structure are the same as those of Example 1.

[0034] See Figure 8 Example 3 differs from Example 2 and Example 1 only in that the main housing 1 does not have a guide sleeve 6 and a pressing cap 7, while the functions of the rest of the structure are the same as in Example 1. In use, by holding the main housing 1 and pressing the elastic squeeze bladder 4, and blocking the air intake 3 with your fingers, the gas in the elastic squeeze bladder 4 is forced into the sealed space between the one-way air intake component 100 and the piston 5. If the pressure in the sealed space is sufficient to push the piston 5, the piston 5 is pushed, squeezing the cosmetic contents of the main housing 1 out through the one-way discharge structure 2. After that, the fingers are released from the elastic squeeze bladder 4. Since the one-way discharge structure 2 restricts air intake, the gas will not enter the main housing 1 from the one-way discharge structure 2, so the piston 5 will not move. At this time, the air intake 3 of the elastic squeeze bladder 4 is opened, and the elastic squeeze bladder 4 will draw in air from the air intake 3 and automatically reset. If the viscosity of the contents is high, one squeeze of the elastic squeeze bladder 4 is not enough to push the piston 5, so the operation of squeezing and releasing the elastic squeeze bladder 4 is repeated. Due to the function of the one-way air intake component 100, the air can be confined in the sealed space between the one-way air intake component 100 and the piston 5. After squeezing in gas multiple times, the air pressure in the sealed space increases, which can push the piston 5 to move.

[0035] The above are merely preferred embodiments 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 scope of protection of this utility model.

Claims

1. A pressurized anti-backflow cosmetic container, comprising a main shell (1), characterized in that: The main housing (1) is provided with a one-way discharge structure (2) and an elastic compression bladder (4) with an air intake (3). A piston (5) is slidably disposed in the main housing (1) between the elastic compression bladder (4) and the one-way discharge structure (2). The piston (5) airtightly separates the two sides of the main housing (1). The air outlet of the elastic compression bladder (4) faces the piston (5). A one-way air intake assembly (100) is provided between the elastic compression bladder (4) and the piston (5) to allow air to enter the piston (5). A sealed space is formed between the one-way air intake assembly (100) and the piston (5).

2. The pressurized anti-backflow cosmetic container as described in claim 1, characterized in that: The one-way air intake assembly (100) includes a positioning sleeve (101) fixed to the inner wall of the main housing (1). The positioning sleeve (101) has a central hole (102). The central hole (102) has an elastic protrusion (103) that protrudes toward the piston (5). The elastic protrusion (103) has an air outlet gap (104).

3. A pressurized anti-backflow cosmetic container as described in claim 2, characterized in that: The elastic compression bladder (4) is provided with an annular limiting groove (22), and the annular limiting part (23) extending inward from the tail of the main housing (1) is engaged in the annular limiting groove (22). The elastic protrusion (103) is located on the elastic cap (105), and the elastic cap (105) is sandwiched between the positioning sleeve (101) and the elastic compression bladder (4).

4. A pressurized anti-backflow cosmetic container as described in claim 1, characterized in that: A guide sleeve (6) is provided on one side of the elastic compression bladder (4) on the main housing (1). A pressing cap (7) is movably provided inside the guide sleeve (6). The bottom of the pressing cap (7) is provided with a fitting surface (29) that seals the air intake (3) when pressed down.

5. A pressurized anti-backflow cosmetic container as described in claim 4, characterized in that: The pressing cap (7) includes a pressing member (24) and an abutting member (25). The pressing member (24) is provided with a radially extending second limiting part (26), and the abutting member (25) is provided with a radially extending third limiting part (27). The pressing member (24) and the abutting member (25) are fastened together from both sides of the guide sleeve (6) to form the pressing cap (7).

6. A pressurized anti-backflow cosmetic container as described in claim 4, characterized in that: The bottom of the pressing cap (7) is provided with a guide rod (28) that is inserted into the air inlet (3) to guide the air inlet (3) up and down.

7. A pressurized anti-backflow cosmetic container as described in claim 1, characterized in that: The unidirectional discharge structure (2) includes a positioning element (8), which has a flow port (9) and an elastic sealing sheet (10) on the discharge side. The elastic sealing sheet (10) covers the discharge side of the flow port (9).

8. A pressurized anti-backflow cosmetic container as described in claim 7, characterized in that: The positioning member (8) is provided with a positioning port (11), and the elastic sealing sheet (10) is connected with a positioning rod (12) that passes through the positioning port (11). The positioning rod (12) is provided with a first limiting part (13) that extends radially outward from one end of the feeding side of the flow port (9).

9. A pressurized anti-backflow cosmetic container as described in claim 7, characterized in that: The positioning member (8) is provided with a discharge hood (15) with a discharge hole (14) on its outer side. The discharge hood (15) is fastened to the main housing (1). The positioning member (8) is provided with a limiting ring (16) radially outward. The outer side of the unidirectional discharge structure (2) abuts against the discharge hood (15). The inner side of the limiting ring (16) abuts against the main housing (1). The positioning member (8) is provided with a first annular extension (17) on the side facing the discharge hood (15). The inner side of the discharge hood (15) is provided with a second annular extension (18). The outer wall of the first annular extension (17) is fastened to the inner wall of the second annular extension (18).

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