Liquid supply regulator for liquid cosmetic containers

The liquid supply regulator addresses clogging and leakage issues in cosmetic containers by using a through hole, air-liquid-tight seal, and pressure relief system, ensuring smooth liquid flow and cost-effective manufacturing.

JP7871992B2Active Publication Date: 2026-06-09ASANUMA
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
ASANUMA
Filing Date
2022-09-02
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Conventional liquid cosmetic containers face issues with clogging and leakage due to the use of bellows and fibrous cores, especially with high-viscosity liquids, leading to incomplete application and staining.

Method used

A liquid supply regulator without bellows or fibrous cores, featuring a through hole, air-liquid-tight seal, core flange, pressure relief chamber, and ventilation holes, allowing smooth liquid flow and pressure equalization.

Benefits of technology

Prevents clogging and leakage, ensuring continuous liquid supply and reducing manufacturing costs by eliminating the need for bellows, while maintaining product accuracy and ease of assembly.

✦ Generated by Eureka AI based on patent content.

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Abstract

To provide a liquid supply controller which does not use bellows or a fibrous relay core, does not cause liquid leakage due to a change in pressure or a change in temperature in a tank, or does not cause clogging in the middle of a stream even when using highly viscose liquid cosmetic (often termed "bulk").SOLUTION: A liquid supply controller without bellows is formed with an open hole at a central position in an extension direction of the chemical supply controller and comprises an airtight and liquid-tight seal part on an outer periphery of the liquid supply controller. A core flange part is protrudingly provided on the outer periphery of a rear end part on the side facing a tank of the liquid supply controller. The outer periphery of the core flange part is brought into contact with a body inner peripheral surface of a cosmetic container air-tightly and liquid-tightly. A pressure-discharging chamber capable of retaining bulk of redundant liquid is formed in the outer peripheral part of the liquid supply controller between the airtight and liquid-tight seal part and the core flange part. A vent hole is formed between the pressure-discharging chamber and the open hole. At least one or more pressure-discharging grooves are formed on the outer peripheral wall of the core flange part, and the pressure-discharging groove communicates with the tank and the pressure-discharging chamber.SELECTED DRAWING: Figure 1
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Description

Technical Field

[0001] The present invention relates to a liquid supply regulator for a liquid cosmetic container. More specifically, without using a bellows or a fibrous relay core, liquid leakage does not occur due to pressure changes or temperature changes in the tank, and even when using a highly viscous liquid cosmetic (liquid cosmetics may also be referred to as "bulk"), the liquid supply regulator does not get clogged during the flow. The liquid supply regulator in the present invention is for the purpose of adjusting the supply amount of the bulk, is a synonym for a regulating valve, and is installed in place of the conventional relay core.

Background Art

[0002] Conventionally, liquid cosmetic containers for applying cosmetics such as liquid eyeliners and liquid eyebrow pencils in pen-shaped cosmetic containers have been known. This liquid cosmetic container forms a tank 1 inside the liquid cosmetic container 10 (more specifically, inside the body 12 in the liquid cosmetic container), and a relay core is interposed between this tank 1 and the pen tip 2. The rear end portion of the relay core is adjacent to the tank 1, and this relay core faces the pen tip 2 that serves as an application portion, and an appropriate amount of bulk is continuously and smoothly supplied to the pen tip 2.

[0003] A flange 5 is formed at the rear end of the pen tip 2 to bundle the pen tip and hold it stably inside the liquid cosmetic container 10. Reference numeral 4 is a tail plug that closes the rear end of the tank 1, and a stirring ball 6 is housed inside the tank 1.

[0004] Also, a nose piece 11 is applied and set to cover the flange 5 of the pen tip and the pen tip 2 from the outside. In many cases, the outer shape of the nose piece 11 is in the form of a whole cylindrical shape (there are also nose pieces made of a cylindrical shape other than a tapered shape).

[0005] In a conventional pen-shaped cosmetic container, a bellows is installed on the outer peripheral surface of the relay core, and this bellows functions as a mechanism for preventing liquid leakage due to pressure changes or temperature changes in the tank. [Prior art documents] [Patent Documents]

[0006] [Patent Document 1] Japanese Patent Publication No. 2009-269251 [Patent Document 2] Japanese Patent Publication No. 2017-113128 [Disclosure of the Invention] [Problems that the invention aims to solve]

[0007] In conventional cosmetic containers, the core used for the intermediate layer is prone to clogging, especially when it comes to cosmetics using high-viscosity bulk materials, particularly those using fibrous cores. Furthermore, it cannot cope with pressure changes when opening and closing the cap, making it prone to leakage. As a result, when attempting to apply cosmetics, the bulk (especially high-viscosity bulk) would not reach the tip of the brush, making smooth application impossible. Furthermore, problems such as hands getting stained with bulk that leaked around the cosmetic container also occurred.

[0008] Furthermore, in the case of a combination of bellows and a connecting core, bulk material accumulates in the space inside the bellows, and if it exceeds a certain amount, liquid leakage occurs from the gap in the nosepiece. Also, since bulk material cannot move directly between the connecting core and the bellows, there was a problem in that the bulk material inside the bellows could not be absorbed into the connecting core.

[0009] This invention proposes a liquid supply regulator for a liquid cosmetic container that replaces the conventional relay core with a liquid supply regulator, eliminating the need to use a component that holds excess liquid bulk, such as a bellows, when the internal pressure of the tank rises or the internal temperature of the tank changes. Furthermore, the liquid supply regulator is configured to allow the bulk moving between the tank and the brush tip to pass through smoothly without clogging, and at the same time, allows for the smooth introduction of air into the tank when necessary. [Means for solving the problem]

[0010] To achieve the above objective, the invention described in claim 1 is a liquid supply regulator for a liquid cosmetic container, characterized in that it is a liquid supply regulator without bellows, a through hole is formed at the center of the extension direction of the liquid supply regulator, an air-liquid-tight seal portion is provided on the outer circumference of the liquid supply regulator, a core flange portion is provided projecting from the outer circumference of the rear end of the liquid supply regulator on the side facing the tank, the outer circumference of this core flange portion is in air-liquid-tight contact with the inner surface of the body of the cosmetic container, a pressure relief chamber capable of accumulating excess liquid bulk is formed on the outer circumference of the liquid supply regulator sandwiched between the air-liquid-tight seal portion and the core flange portion, a ventilation hole is formed between this pressure relief chamber and the through hole, and at least one pressure relief groove is formed on the outer wall of the core flange portion, and this pressure relief groove is configured to communicate the tank and the pressure relief chamber.

[0011] Furthermore, in order to achieve the above objective, the invention described in claim 2 is a liquid supply regulator for a liquid cosmetic container, characterized in that a through hole is formed at the center of the extension direction of the liquid supply regulator, an air-liquid-tight seal portion is provided on the outer circumference of the liquid supply regulator, a core flange portion is provided projecting from the outer circumference of the rear end of the liquid supply regulator on the side facing the tank, the outer circumference of this core flange portion is in air-liquid-tight contact with the inner surface of the body of the cosmetic container, a pressure relief chamber capable of accumulating excess liquid bulk is formed on the outer circumference of the liquid supply regulator sandwiched between the air-liquid-tight seal portion and the core flange portion, the liquid supply regulator is formed as a two-part structure of a pipe body having a through hole and an outer pipe cylinder that holds the pipe body from the outer circumference, an airflow passage communicating with the brush tip is formed between the pipe body and the outer pipe cylinder, a ventilation hole is formed between the pressure relief chamber and the airflow passage, at least one pressure relief groove is formed on the outer wall of the core flange portion, and this pressure relief groove is configured to communicate the tank and the pressure relief chamber.

[0012] The invention described in claim 3 is a liquid supply regulator for a liquid cosmetic container according to claim 1, characterized in that a plurality of pressure relief grooves are formed at equal or unequal intervals on the outer circumferential wall of the core flange.

[0013] The invention described in claim 4 is a liquid supply regulator for a liquid cosmetic container according to claim 2, characterized in that a plurality of pressure relief grooves are formed at equal or unequal intervals on the outer circumferential wall of the core flange.

[0014] Claim 5 is the liquid supply regulator for a liquid cosmetic container according to Claim 1, characterized in that the air-liquid-tight sealing portion is an O-ring made of an elastic material.

[0015] Claim 6 is the liquid supply regulator for a liquid cosmetic container according to claim 2, characterized in that the air-liquid-tight sealing portion is an O-ring made of an elastic material.

[0016] Claim 7 is a liquid supply regulator for a liquid cosmetic container according to Claim 1, characterized in that the air-liquid-tight sealing portion is a molded product in which a raised portion is formed on the outer circumference of the liquid supply regulator.

[0017] Claim 8 is a liquid supply regulator for a liquid cosmetic container according to claim 2, characterized in that the air-liquid-tight sealing portion is a molded product in which a raised portion is formed on the outer circumference of the liquid supply regulator. [Effects of the Invention]

[0018] The liquid supply regulator for liquid cosmetic containers according to claims 1 to 8 described above has the excellent effect of reducing the number of parts and significantly lowering manufacturing costs because it does not use bellows or fibrous intermediate cores, and does not cause liquid leakage when the pressure inside the liquid cosmetic container changes, and does not clog even with high-viscosity bulk liquids. In particular, the liquid supply regulator for the liquid cosmetic container according to claim 2 is formed with a two-part structure consisting of a pipe body having a through hole and an outer pipe cylinder that holds the pipe body from the outside. This makes it easier to assemble and manufacture the liquid supply regulator and improves product accuracy. [Brief explanation of the drawing]

[0019] [Figure 1] This is a longitudinal cross-sectional front view of the first embodiment of the assembled liquid cosmetic container (with an integrated liquid supply regulator). [Figure 2] This is a longitudinal front view of the second embodiment of the assembled liquid cosmetic container (the liquid supply regulator has a two-part structure). [Figure 3]An enlarged view of the main part of a liquid cosmetic container (near the nose piece when the cap is closed). [Figure 4] An enlarged view of the main part of a liquid cosmetic container (near the nose piece when the cap is open). [Figure 5] An enlarged view of the main part of a liquid cosmetic container (near the pen tip side of the through-hole of the liquid supply regulator). [Figure 6] An enlarged view of the first embodiment of the main part of a liquid cosmetic container (near the tank side of the through-hole of the liquid supply regulator). [Figure 7] An enlarged view of the second embodiment of the main part of a liquid cosmetic container (near the tank side of the through-hole of the liquid supply regulator). [Figure 8] An enlarged view of the main part of a liquid cosmetic container (the air-liquid tight seal part is an O-ring made of an elastic material).

Mode for Carrying Out the Invention

[0020] Hereinafter, based on the accompanying drawings, embodiments of the liquid supply regulator of the liquid cosmetic container according to the present invention will be described in detail. The liquid cosmetic container 10 is for applying an aqueous or oily bulk such as a liquid eyeliner, a liquid eyebrow pencil, or a gel liner with a pen tip 2, and an appropriate amount of the bulk in the tank 1 can be continuously and smoothly supplied to the pen tip 2 via the liquid supply regulator 3. The liquid supply regulator 3 is generally formed by mixing and solidifying polypropylene, polyester, acrylic, etc. with a resin binder and cutting it into the shape of the liquid supply regulator. As the pipe body 3A and the outer pipe cylinder 3B, in addition to the above, those formed by molding and solidifying POM resin, elastomer resin, or olefin resin can be used. Furthermore, as the pipe body 3A, it is also possible to use a stainless metal pipe in addition to the above.

[0021] A flange 5 is formed at the rear end of the pen tip 2, and a nose piece 11 is applied and set to cover the flange 5 of the pen tip and the pen tip 2 from the outside. A tail plug 4 is provided at the rear end of the tank 1, and a stirring ball 6 is housed in the tank 1.

[0022] As shown in Figures 1 and 2, a through-hole 7 is formed at the center of the liquid supply regulator 3 in the direction of extension. Bulk liquid flows from the tank 1 towards the brush tip 2, and conversely, air flows from the brush tip 2 towards the tank 1, through this through-hole 7. The inner diameter of the through-hole 7 can be freely designed according to the size of the liquid cosmetic container 10, the volume of bulk stored in the tank 1, and its viscosity. Therefore, even if the bulk material is highly viscous or contains solid particles such as glitter, the bulk material can move freely through the through-hole 7. The liquid supply regulator 3 of the present invention may be formed as a single integrated unit, as in the first embodiment, but it can also be formed as a two-part structure consisting of a pipe body 3A with a through hole 7 and an outer pipe cylinder 3B that encloses this pipe body from the outside, as in the second embodiment.

[0023] In this invention, the liquid supply regulator 3 is provided with an air-liquid-tight seal portion 8 made of an O-ring or a molded product with a raised portion formed on its outer circumference, and a core flange portion 9 is provided protruding from the outer circumference of the rear end of the liquid supply regulator 3 on the side facing the tank. In other words, the core flange portion 9 is a protruding part that bulges slightly above the outer circumference of the liquid supply regulator 3, and the outer circumference of this core flange portion 9 is in air-liquid-tight contact with the inner surface of the body 12 of the cosmetic container 10.

[0024] Due to this configuration, a pressure relief chamber 13 is formed on the outer circumference of the liquid supply regulator 3, which is sandwiched between the air-liquid-tight seal portion 8 and the core flange portion 9. This chamber can store excess liquid bulk when the pressure inside the tank 1 rises and excess liquid bulk is generated near the liquid supply regulator 3. Since one end of the pressure relief chamber 13 is closed by the air-liquid-tight seal portion 8, the bulk and air are trapped inside the pressure relief chamber 13, and the other end of the pressure relief chamber 13 is trapped by the core flange portion 9, which also traps the bulk and air. Here, the gas-liquid tight seal portion 8 is preferably formed with an O-ring or a molded product with a raised portion formed on the outer circumference of the liquid supply regulator, which ensures accuracy in manufacturing and gas-liquid density. The volume of this pressure relief chamber 13 can be freely designed according to the size of the liquid cosmetic container 10, the volume of bulk stored in the tank 1, and its viscosity.

[0025] In the first embodiment, as shown in Figure 6, a vent hole 15 is formed between the pressure relief chamber 13 and the through hole 7. This vent hole 15 allows air from inside the pressure relief chamber to escape into the through hole 7 when excess bulk liquid enters the pressure relief chamber 13 due to pressure fluctuations, thus enabling the excess bulk liquid to enter the pressure relief chamber 13 without problems. In other words, the escaped air reaches the through hole 7 via the vent hole 15, then reaches the cap 16 via the brush tip 2 through the through hole 7, and is released outside the liquid cosmetic container 10 after the cap 16 is opened.

[0026] In the second embodiment, as shown in Figure 7, the liquid supply regulator 3 is formed as a two-part structure consisting of a pipe body 3A having a through hole 7 and an outer pipe cylinder 3B that holds the pipe body from the outer circumference. An air passage 17 communicating with the brush tip 2 is formed between the pipe body and the outer pipe cylinder, and a vent hole 15 is formed between the pressure relief chamber 13 and the air passage 17. This vent hole 15 is intended to allow the bulk of excess liquid to enter the pressure relief chamber 13 without problems when excess liquid bulk enters due to pressure fluctuations in the pressure relief chamber 13, by releasing the air from the pressure relief chamber 13 into the air passage 17. In other words, the released air reaches the vent hole 15 into the vent passage 17, and then reaches the cap 16 from the brush tip 2 via the vent passage 17, and is released outside the liquid cosmetic container 10 after the cap 16 is opened.

[0027] In the second embodiment, the airflow passage 17 is an airflow path formed between the pipe body and the outer pipe body in a state that communicates with the brush tip 2, and the shape of the flow path can be linear or planar, as long as the air flows from the pressure relief chamber 13 through the vent hole 15 to the brush tip 2.

[0028] Furthermore, in this invention, at least one pressure relief groove 14 is formed on the outer peripheral wall of the core flange portion 9, and since this pressure relief groove 14 is configured to connect the tank 1 and the pressure relief chamber 13, when the internal pressure of the tank rises, excess bulk liquid that cannot be discharged from the through-hole 7 of the liquid supply regulator 3 is urgently sent from the pressure relief groove 14 to the pressure relief chamber 13.

[0029] The number of pressure relief chambers 13 and pressure relief grooves 14 in the liquid supply regulator 3 shown in Figures 6 and 7 is an example. The petal-shaped drawing section shown on the right side of Figures 6 and 7 is an additional addition, and the right end face of the liquid supply regulator 3 is shown alongside the cross-sectional view for clarity. In each diagram, the black arrows indicate the direction in which bulk material flows when the pressure increases, while the white arrows indicate the direction in which air flows.

[0030] While at least one pressure relief groove 14 is sufficient, multiple grooves can be formed at equal or unequal intervals to absorb the pressure when excess liquid enters the bulk. The volume of this pressure relief groove 14 can be freely designed according to the size of the liquid cosmetic container 10, the volume of bulk stored in the tank 1, and its viscosity.

[0031] A liquid cosmetic container incorporating the user-friendly liquid supply regulator of the present invention prevents leaks, ensures that the liquid cosmetic is not interrupted, and allows the liquid cosmetic in tank 1 to be used completely without any inconvenience. [Industrial applicability]

[0032] This invention is used in industries that use or manufacture liquid cosmetic containers. [Explanation of symbols]

[0033] 1... Tank 2…brush tip 3…Liquid supply regulator 3A... Pipe body of the liquid supply regulator 3B... Outer cylinder of the liquid supply regulator pipe 4... tail plug 5... The collar of the brush tip 6… Mixing ball 7…Through hole 8... Air-liquid-tight seal section 9... Core flange 10… Liquid cosmetic container 11…Nosepiece 12...Body 13…Pressure relief chamber 14… Pressure relief groove 15…Ventilation holes 16…Cap 17...Air flow path

Claims

1. A liquid supply regulator for a liquid cosmetic container, characterized in that it does not have a bellows, a through hole is formed at the center of the extension direction of the liquid supply regulator, an air-liquid-tight seal portion is provided on the outer circumference of the liquid supply regulator, a core flange portion is provided projecting from the outer circumference of the rear end of the liquid supply regulator on the side facing the tank, the outer circumference of this core flange portion is in air-liquid-tight contact with the inner surface of the body of the cosmetic container, a pressure relief chamber capable of accumulating excess liquid bulk is formed on the outer circumference of the liquid supply regulator sandwiched between the air-liquid-tight seal portion and the core flange portion, a ventilation hole is formed between this pressure relief chamber and the through hole, and at least one pressure relief groove is formed on the outer wall of the core flange portion, the pressure relief groove is configured to communicate the tank and the pressure relief chamber.

2. A liquid supply regulator for a liquid cosmetic container, characterized in that it does not have a bellows, a through hole is formed at the center of the extension direction of the liquid supply regulator, an air-liquid-tight seal portion is provided on the outer circumference of the liquid supply regulator, a core flange portion is provided projecting from the outer circumference of the rear end of the liquid supply regulator on the side facing the tank, the outer circumference of this core flange portion is in air-liquid-tight contact with the inner surface of the body of the cosmetic container, a pressure relief chamber capable of accumulating excess liquid bulk is formed on the outer circumference of the liquid supply regulator sandwiched between the air-liquid-tight seal portion and the core flange portion, the liquid supply regulator is formed as a two-part structure of a pipe body having a through hole and an outer pipe cylinder that holds the pipe body from the outer circumference, an airflow passage communicating with the brush tip is formed between the pipe body and the outer pipe cylinder, a ventilation hole is formed between the pressure relief chamber and the airflow passage, at least one pressure relief groove is formed on the outer wall of the core flange portion, and this pressure relief groove is configured to communicate the tank and the pressure relief chamber.

3. The liquid supply regulator for a liquid cosmetic container according to claim 1, characterized in that a plurality of pressure relief grooves are formed at equal or unequal intervals on the outer circumferential wall of the core flange.

4. The liquid supply regulator for a liquid cosmetic container according to claim 2, characterized in that a plurality of pressure relief grooves are formed at equal or unequal intervals on the outer circumferential wall of the core flange.

5. The liquid supply regulator for a liquid cosmetic container according to claim 1, characterized in that the air-liquid-tight sealing portion is an O-ring made of an elastic material.

6. The liquid supply regulator for a liquid cosmetic container according to claim 2, characterized in that the air-liquid-tight sealing portion is an O-ring made of an elastic material.

7. The liquid supply regulator for a liquid cosmetic container according to claim 1, characterized in that the air-liquid-tight sealing portion is a molded product in which a raised portion is formed on the outer circumference of the liquid supply regulator.

8. The liquid supply regulator for a liquid cosmetic container according to claim 2, characterized in that the air-liquid-tight sealing portion is a molded product in which a raised portion is formed on the outer circumference of the liquid supply regulator.