Anti-suck-back cosmetic container

Abstract

The utility model discloses an 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 piston separates the two sides of the main shell in an airtight mode. An air outlet of the elastic extrusion bag faces the piston, a guide sleeve is arranged on the side, located on the elastic extrusion bag, of the main shell, a pressing cap is movably arranged in the guide sleeve, and the bottom of the pressing cap is provided with a binding face for sealing the air suction port when the pressing cap is pressed downwards. The anti-suck-back cosmetic container can effectively prevent external air from entering the cosmetic container to pollute cosmetics in the use period, and is simple in structure, low in manufacturing cost and convenient to use.

Description

Technical Field

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

[0002] As people's living standards improve, the demand for cosmetics is also increasing. Cosmetic containers come in a wide variety, and in the cosmetics industry, the convenience of storage and use, as well as the stability of the products, are crucial. Currently, most cosmetic containers are significantly inadequate in preventing air intake.

[0003] Traditional cosmetic bottles, such as the common wide-mouth bottles and squeeze bottles, are not designed with sufficient consideration for the impact of air ingress on product quality. When a wide-mouth bottle is opened, a large area of ​​the opening is directly exposed to the air. Each time cosmetics are used, air easily enters the bottle, accelerating product oxidation. This is especially true for cosmetics rich in easily oxidized ingredients such as oils and vitamins, including some anti-wrinkle creams and serums. Frequent contact with air can cause active ingredients to deteriorate, reducing product efficacy and even causing problems such as unpleasant odors and discoloration, negatively impacting the consumer experience.

[0004] While squeeze bottles offer an improvement in dispensing methods, the pressure changes during the squeezing process to expel cosmetics. When the pressure returns to normal, outside air enters, making it impossible to avoid contact between air and the product. Over time, this can still cause the product to deteriorate due to oxidation, microbial contamination, and other issues.

[0005] As consumers place increasing demands on the quality and safety of cosmetics, the development of cosmetic containers that can effectively prevent air from being inhaled has become an urgent need in the industry. Summary of the Invention

[0006] This invention addresses the shortcomings of existing technologies by providing an anti-backflow cosmetic container. This anti-backflow cosmetic container can effectively prevent outside air from entering the cosmetic container and contaminating the cosmetics during use. It also has a simple structure, low manufacturing cost, and is easy to use.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a cosmetic container with anti-backflow capability, 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, a guide sleeve is provided on the main shell on one side of the elastic squeeze bladder, a pressing cap is movably disposed within the guide sleeve, and the bottom of the pressing cap is provided with a fitting surface that seals the air intake when pressed down. When using this anti-backflow cosmetic container, hold the main body and press the cap. Pressing the bottom of the cap seals the air inlet, causing a sudden increase in air pressure between the elastic squeeze bladder and the piston. This pushes the piston, expelling the cosmetic contents from the main body through the one-way discharge structure. When the cap is released, the one-way discharge structure prevents air from entering the main body, so the piston does not move. The seal between the squeeze bladder and the air inlet is not completely tight, allowing the elastic squeeze bladder to draw air in and automatically reset, simultaneously lifting the cap back to its original position. This anti-backflow cosmetic container effectively prevents outside air from entering and contaminating the cosmetic contents during use. It is also simple in structure, low in manufacturing cost, and easy to use.

[0008] 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.

[0009] 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.

[0010] In the above technical solution, preferably, a discharge cover with a discharge hole is provided on the outer side of the positioning member. The discharge cover is fastened to the main housing. A limiting ring is provided radially outward on the positioning member. 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. This structure can protect the unidirectional discharge structure by the discharge cover, preventing the unidirectional discharge structure from accidentally opening the flow port and allowing external air to enter the main housing if it comes into contact with a person.

[0011] In the above technical solution, preferably, the positioning member has a first annular extension on the side facing the discharge hood, and a second annular extension is provided on the inner side of the discharge hood. The outer wall of the first annular extension is fastened to the inner wall of the second annular extension. This structure allows the unidirectional discharge structure to be integrated with the discharge hood, facilitating the installation of the unidirectional discharge structure and the discharge hood after cosmetic filling.

[0012] In the above technical solution, preferably, the positioning member has a connecting portion extending into the main housing, and a first annular groove is provided on the outer periphery of the connecting portion. A sealing ring is sleeved inside the first annular groove, and the outer side of the sealing ring is in close contact with the inner wall of the main housing. This structure improves the sealing performance between the positioning member and the main housing, preventing gas from leaking into the main housing.

[0013] In the above technical solution, preferably, the elastic compression bladder has a second annular groove on its outer periphery, and the main housing has a mating hole, the sidewall of which engages with the second annular groove to position the elastic compression bladder. This structure facilitates the installation of the elastic compression bladder.

[0014] 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.

[0015] In the above technical solution, preferably, the outer wall of the elastic compression bladder is provided with several protrusions around the air intake. This structure increases the friction between the elastic compression bladder and the contact surface, preventing irregular deformation of the elastic compression bladder during compression, which could cause the air intake to deviate from the contact surface and become unblockable. This, in turn, would cause the air intake to deflect when the elastic compression bladder is compressed, preventing the piston from moving downwards. Furthermore, a certain gap exists between the protrusions and the contact surface, preventing the elastic compression bladder from failing to draw in gas and thus failing to return to its original position when it resets due to an overly tight fit between the contact surface and the air intake.

[0016] 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.

[0017] Compared with existing technologies, this invention has the following advantages: When using this anti-backflow cosmetic container, the main body is held and the pressing cap is pressed. Pressing the bottom of the pressing cap seals the air intake, causing a sudden increase in air pressure between the elastic compression bladder and the piston. This pushes the piston, expelling the cosmetic contents of the main body through the one-way discharge structure. When the pressing cap is released, because the one-way discharge structure restricts air intake, gas will not enter the main body through the one-way discharge structure, so the piston will not move. The seal between the compression surface and the air intake is not completely tight, allowing the elastic compression bladder to draw air from the air intake and automatically reset, simultaneously lifting and resetting the pressing cap. This anti-backflow cosmetic container effectively prevents outside air from entering the container and contaminating the cosmetic contents during use. It also has a simple structure, low manufacturing cost, and is easy to use. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this utility model.

[0019] Figure 2 This is a cross-sectional structural diagram of Embodiment 1 of the present invention.

[0020] Figure 3 This is an exploded structural diagram of Embodiment 1 of the present invention.

[0021] Figure 4 This is a schematic diagram showing the disassembly of the positioning element and the elastic sealing sheet in Embodiment 1 of this utility model.

[0022] Figure 5 This is a schematic diagram of the elastic compression bladder in Embodiment 1 of this utility model.

[0023] Figure 6 This is a cross-sectional structural diagram of Embodiment 2 of the present invention.

[0024] Figure 7 This is an exploded structural diagram of the pressing cap and elastic compression bladder in Embodiment 2 of this utility model. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments: See below Figures 1 to 5Example 1: A cosmetic container with anti-backflow capability 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. 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 guide sleeve 6 is provided on one side of the elastic squeeze bladder 4 on the main shell 1. A pressing cap 7 is movably disposed 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. When using this anti-backflow cosmetic container, hold the main body 1 and press the press cap 7. Pressing the bottom of the press cap 7 seals the air intake 3 with the contact surface 29, causing a sudden increase in air pressure between the elastic squeeze bladder 4 and the piston 5. This pushes the piston 5, expelling the cosmetic contents of the main body 1 through the one-way discharge structure 2. When the press cap 7 is released, because the one-way discharge structure 2 restricts air intake, gas will not enter the main body 1 from the one-way discharge structure 2, so the piston 5 will not move. The contact surface 29 and the air intake 3 are not completely sealed, so the elastic squeeze bladder 4 will draw air from the air intake 3 and automatically reset, simultaneously lifting the press cap 7 back to its original position. This anti-backflow cosmetic container effectively prevents outside air from entering the container and contaminating the cosmetic contents during use. It also has a simple structure, low manufacturing cost, and is easy to use.

[0026] The anti-backflow cosmetic container works in conjunction with the pressing cap 7, the elastic squeeze bladder 4 with the air intake 3, and the one-way discharge structure 2 to ensure that when the pressing cap 7 is pressed, the material is discharged in one direction from the one-way discharge structure 2 without backflow of air into the main shell 1. At the same time, it does not affect the reset of the elastic squeeze bladder 4, and the elasticity of the elastic squeeze bladder 4 is also used to reset the pressing cap 7.

[0027] In this embodiment, the elastic compression bladder 4 is provided with an air intake 3, and the air intake 3 is located at the top center of the elastic compression bladder 4. It will be readily understood by those skilled in the art that in other embodiments, there may be multiple air intakes 3, as long as there are corresponding mating surfaces 29 to cooperate.

[0028] 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 2 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.

[0029] 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.

[0030] 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 of 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. 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.

[0031] In this embodiment, the positioning member 8 has a first annular extension 17 on the side 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 allows the unidirectional discharge structure 2 to be integrated with the discharge cover 15, making it convenient to install the unidirectional discharge structure 2 and the discharge cover 15 after filling cosmetics.

[0032] In this embodiment, the positioning member 8 has a connecting portion 19 that extends into the main housing 1. A first annular groove 20 is provided on the outer periphery of the connecting portion 19, and a sealing ring 21 is sleeved inside the first annular groove 20. The outer side of the sealing ring 21 is in close contact with the inner wall of the main housing 1. This structure improves the sealing performance between the positioning member 8 and the main housing 1, preventing gas from leaking into the main housing 1.

[0033] In this embodiment, a second annular groove 22 is provided on the outer periphery of the elastic compression bladder 4, and a mating hole 23 is provided on the main housing 1. The side wall of the mating hole 23 is engaged with the second annular groove 22 to position the elastic compression bladder 4. This structure facilitates the installation of the elastic compression bladder 4.

[0034] In this embodiment, the inner wall of the guide sleeve 6 is fastened to the outer wall of the main housing 1. This structure facilitates the installation of the guide sleeve 6 and the main housing 1.

[0035] 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.

[0036] In this embodiment, the outer wall of the elastic compression bladder 4 is provided with several protrusions 28 around the air intake 3. This structure increases the friction between the elastic compression bladder 4 and the contact surface 29, preventing the air intake 3 from deviating from the contact surface 29 due to irregular deformation of the elastic compression bladder 4 during the pressing process. This would prevent the air intake 3 from being blocked by the contact surface 29, thus causing the air intake 3 to deflect when the elastic compression bladder 4 is pressed down and preventing the piston 5 from moving down. Furthermore, it ensures that there is a certain gap between the protrusions 28 and the contact surface 29, preventing the elastic compression bladder 4 from being unable to draw in gas from the air intake 3 and thus making it difficult to reset when the elastic compression bladder 4 resets due to the contact surface 29 and the air intake 3 being too tightly fitted.

[0037] See Figures 6 to 7 Example 2 differs from Example 1 only in that the fitting structure between the pressing cap 7 and the elastic compression bladder 4 is slightly different. In this example, the bottom of the pressing cap 7 is provided with a guide rod 30 that guides the air intake 3 to move up and down. By providing the guide rod 30 at the bottom of the pressing cap, the air intake 3 always moves up and down along the guide rod 30 during the downward compression deformation of the elastic compression bladder 4, thereby ensuring that the air intake 3 can always be blocked by the contact surface 29, avoiding the problem that the air intake deflects when the elastic compression bladder 4 is pressed down, preventing the piston 5 from moving down.

[0038] 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 cosmetic container with anti-backflow feature, 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 arranged inside 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 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 arranged inside the guide sleeve (6). The bottom of the pressing cap (7) is provided with a sealing surface (29) that seals the air intake (3) when pressed down.

2. The 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).

3. The anti-backflow cosmetic container as described in claim 2, 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).

4. The anti-backflow cosmetic container as described in claim 2, characterized in that: The positioning member (8) is provided with a discharge cover (15) with a discharge hole (14) on the outside. The discharge cover (15) is fastened to the main housing (1). The positioning member (8) is provided with a limiting ring (16) in the radial direction. The outer side of the unidirectional discharge structure (2) abuts against the discharge cover (15), and the inner side of the limiting ring (16) abuts against the main housing (1).

5. A cosmetic container for preventing backflow as described in claim 4, characterized in that: The positioning member (8) is provided with a first annular extension (17) on the side facing the discharge hood (15), and a second annular extension (18) is provided on the inner side of the discharge hood (15). The outer wall of the first annular extension (17) is fastened to the inner wall of the second annular extension (18).

6. A cosmetic container for preventing backflow as described in claim 2, characterized in that: The positioning member (8) has a connecting part (19) that extends into the main housing (1). A first annular groove (20) is provided on the outer periphery of the connecting part (19). A sealing ring (21) is sleeved inside the first annular groove (20). The outer side of the sealing ring (21) is in close contact with the inner wall of the main housing (1).

7. A cosmetic container for preventing backflow as described in claim 1, characterized in that: The elastic compression bladder (4) has a second annular groove (22) on its outer periphery, and the main housing (1) has a mating hole (23). The side wall of the mating hole (23) is inserted into the second annular groove (22) to position the elastic compression bladder (4).

8. A cosmetic container for preventing backflow as described in claim 1, 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).

9. A cosmetic container for preventing backflow as described in claim 1, characterized in that: The outer wall of the elastic compression bladder (4) is provided with several protrusions (28) around the air inlet (3).

10. A cosmetic container for preventing backflow as described in claim 1, characterized in that: The bottom of the pressing cap (7) is provided with a guide rod (30) that is inserted into the air inlet (3) to guide the air inlet (3) up and down.

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