JP2023160749A - applicator - Google Patents

Abstract

To provide an applicator which enables easy removal of a liquid film which tends to occur in a coating liquid supply passage formed by a relay member to enable smooth discharge of the coating liquid to solve a problem that formation of the liquid film in a through hole having a small diameter and a space leading to the through hole causes restriction on the discharge of the coating liquid.SOLUTION: A first overview of the invention relates to an applicator 1 in which a relay member 7 is formed with: a peripheral groove which is open to a coating liquid tank 3 side and surrounds a through hole in a peripheral form in an axial range in which the through hole is formed from a coating liquid tank side opening end, forming an inlet of the through hole, to the coating body side; and projections extending from the coating liquid tank 3 side opening end into the coating liquid tank 3.SELECTED DRAWING: Figure 1

Description

The present invention relates to an applicator that can supply a coating liquid stored in a coating liquid tank to a coating destination via a coating liquid storage body.

BACKGROUND ART Conventionally, applicators have been used for various purposes such as writing, drawing, cosmetics, and medical use. Applicators having various internal structures have been disclosed depending on the application, the type of coating liquid, the usage situation, and the like. For example, in Patent Document 1, a relay member is arranged in which a through hole is formed to form a coating liquid supply path that freely supplies the coating liquid to the coating body from a coating liquid tank that directly accommodates the coating liquid and the stirring body. An applicator is disclosed. The open end of the relay member is formed to protrude toward the coating liquid tank side, and the end of the protrusion is closed by the agitator, thereby making it possible to adjust the flow rate of the coating liquid.

No. 3233595 Publication

The applicator disclosed in Patent Document 1 has a problem in that when a liquid film is formed in the small-diameter through-hole and the space leading to the through-hole, the discharge of the coating liquid is delayed.

SUMMARY OF THE INVENTION An object of the present invention is to provide an applicator that can easily remove a liquid film that tends to occur in a coating liquid supply path formed by a relay member and that can discharge a coating liquid well.

The present invention provides a coating liquid tank that directly accommodates a coating liquid and an agitation body, a coating body that applies the coating liquid, and a through hole that forms a coating liquid supply path that freely supplies the coating liquid from the coating liquid tank to the coating body side. a relay member in which a hole is formed; An applicator is provided with a circumferential groove circumferentially surrounding the through hole within the axial range in which the through hole is formed, and a protrusion extending from the opening end on the coating liquid tank side into the coating liquid tank. This is the summary of 1. A second aspect of the present invention provides an applicator in which the radial thickness of the portion of the relay member that forms the through hole becomes smaller toward the opening end on the side of the coating liquid tank that forms the entrance of the through hole. The third aspect is an applicator whose opening end on the coating liquid tank side, which forms the entrance of the through hole, protrudes most toward the coating liquid tank side among the coating liquid tank side opening ends of the relay member.

In the present invention, the thickness of the relay member in the radial direction around the through hole is reduced by a circumferential groove that circumferentially surrounds the through hole within the axial range in which the through hole is formed from the opening end on the coating liquid tank side to the coating body side. becomes smaller. The vibration generated when the agitator collides with the protrusion extending from the open end of the coating liquid tank side into the coating liquid tank is more easily transmitted to the through-hole, making it easier to remove the liquid film that tends to occur in the through-hole. , it is possible to provide an applicator that can discharge the coating liquid well. In addition, in the second gist, when the protrusion formed at the opening end of the relay member on the application liquid tank side collides with the agitator, the radial thickness of the portion of the relay member where the through hole is formed is Since the size becomes smaller toward the opening end on the side of the coating liquid tank that forms the entrance of the hole, vibrations are more easily transmitted to the entrance of the through-hole, making it easier to remove the liquid film, resulting in an applicator that can discharge the coating liquid better. can do. In the third aspect, among the opening ends of the relay member on the coating liquid tank side, the opening end on the coating liquid tank side that forms the entrance of the through hole protrudes the most toward the coating liquid tank side. A large liquid film is less likely to form on the outside of the hole entrance, where vibrations from the projections are difficult to transmit, and the liquid film that tends to occur in through holes is easier to remove, so the applicator can discharge the application liquid better. be able to.

Vertical cross-sectional view of applicator 1 Enlarged view of part A in Figure 1 External perspective view of relay member 7 Vertical cross-sectional view of relay member 7 Side view of relay member 7

Hereinafter, embodiments of the applicator according to the present invention will be described with appropriate reference to the drawings. The present invention is not limited to the embodiments, and various changes can be made without departing from the gist of the present invention.

The applicator of the present invention can be used as a writing or drawing tool such as a brush pen, a felt-tip pen, or a marking pen, a cosmetic tool such as an eyeliner, an eyebrow, or an eye shadow, or a medical tool for applying a chemical solution for sanitary disinfection. Any coating liquid can be used depending on the application of the applicator, but one with a relatively low viscosity of 1.00 mPa・s or more and 100 mPa・s or less at 25°C, or one with a surface tension of 20.0 mN/m It is preferable to use a material with relatively high wettability of 60.0 mN/m or more.

FIG. 1 is a longitudinal cross-sectional view of an applicator 1 that is one of the embodiments of the present invention. The applicator 1 is an eyeliner hair tool. In the applicator 1, each member is housed and arranged based on a shaft tube 2. A coating liquid tank 3, a coating body 4, a coating liquid storage body 5, a coating liquid supply pipe 6, a relay member 7, and the like are arranged in the shaft tube 2.

The shaft cylinder 2 is a member formed by combining a front shaft 2a and a rear shaft 2b. Both the front shaft 2a and the rear shaft 2b are molded products made of polypropylene resin. The front shaft 2a is a cylindrical member that is open at both axial ends and penetrates through the shaft in the axial direction. The rear shaft 2b is a cylindrical member, and is a bottomed member with one end in the axial direction closed and the other end open. A cap 9 is removably attached to the front shaft 2a.

A collar portion, which is a circumferential projection, is provided at the axial midpoint of the outer wall of the front shaft 2a. Further, a front shaft 2a side fitting portion, which is a circumferential projection, is provided on the outer wall of the front shaft 2a and rearward from the flange. A rear shaft 2b side fitting portion, which is a circumferential projection, is provided on the inner wall of the rear shaft 2b. The rear of the front shaft 2a is inserted through the open end of the rear shaft 2b, and the fitting is completed when the front shaft 2a side fitting part and the rear shaft 2b side fitting part get over each other, and the front shaft 2a and the rear The shaft 2b is coupled to the shaft 2b. At this time, the end surface of the open end of the rear shaft 2b comes into contact with the flange of the front shaft 2a, so that both members can be positioned in the axial direction.

The front shaft 2a and the rear shaft 2b can be connected as appropriate by a method such as a press-fit relationship or a screw connection, in addition to a cross-fitting as in this embodiment. Further, the shaft cylinder 2 may be constructed from one hollow cylindrical molded product instead of the two-part combination of the front shaft 2a and the rear shaft 2b as in this embodiment.

The coating liquid tank 3 directly stores the coating liquid L and the stirring body 3a. Coating liquid L is a bulk for eyeliner. The stirring body 3a is a spherical body made of stainless steel (SUS304). The coating liquid tank 3 is a molded article made of polypropylene resin, which is preferable because it has low reactivity with the coating liquid L and has excellent physical strength against collisions of the stirring body 3a during stirring. On the inner wall surface of the coating liquid tank 3, four ribs 3b extending in the axial direction are provided at equal intervals in the circumferential direction, and when forming the coating liquid tank 3, the thickness of the wall becomes uneven and dents are formed on the surface. This is preferable because it can suppress the phenomenon of (so-called sink marks) and prevent the stirring body 3a from adhering to the inner wall surface of the coating liquid tank 3.

The coating liquid tank 3 is a cylindrical member, and is a bottomed member with one end in the axial direction closed and the other end open. The open end of the coating liquid tank 3 is inserted into the rear open end of the front shaft 2a and connected by press fit.

The coating liquid tank 3 can be made as a separate member from the rear shaft 2b as in this embodiment, or it can also be used as a coating liquid tank by directly storing the coating liquid L and the stirring body 3a in the internal space of the rear shaft 2b. .

The coating body 4 is a member for applying the coating liquid L to the surface to be coated. In this embodiment, the applicator 4 includes a brush tip 4a, a fixed tube 4b, and a relay core 4c. The brush tip 4a is a fiber bundle consisting of relatively soft polyamide fibers with excellent wettability and relatively hard polybutylene terephthalate fibers with excellent weather resistance. It is preferable as an eyeliner application body 4 that requires operability. The fixed tube 4b is a cylindrical member that is open at both ends in the axial direction. The fixed tube 4b is a molded product made of polypropylene resin.

The brush tip 4a is arranged at the front open end of the front shaft 2a via a fixed tube 4b. A relay lead 4c is inserted into the rear end of the brush tip 4a. The relay core 4c is a cylindrical fiber bundle. The brush tip 4a and the relay lead 4c have a large number of paths through which the coating liquid L flows and is discharged. A part of it also functions as a path for air exchange performed at the same time as the coating liquid L is discharged.

In addition to arranging the brush tip 4a on the front shaft 2a via the fixed tube 4b as in the present embodiment, the applicator 4 can also be arranged directly on the front shaft 2a without providing the fixed tube 4b, or as a relay. It is also possible to provide a portion corresponding to the lead 4c directly on the brush tip 3a.

As the material of the brush tip 4a, a known material can be selected in consideration of moldability, dryness of the application site, writing taste, etc. Examples of fiber bundles include synthetic fibers such as polyamide fibers, polyester (polybutylene terephthalate, polyethylene terephthalate, polytrimethylene terephthalate, etc.) fibers, acrylic fibers, polyurethane fibers, and polyacrylonitrile fibers, as well as synthetic fibers such as goat, sheep, horse, and squirrel fibers. Natural animal hair can be selected as appropriate. Further, as the porous body, urethane, sponge, etc. can be selected as appropriate.

In this embodiment, the rear of the relay core 4c is inserted into the coating liquid storage body 5. The coating liquid storage body 5 is a member for supplying the coating liquid L from the coating liquid supply pipe 6 described later to the relay core 4c. It also functions as a buffer that temporarily holds the coating liquid L so that the coating liquid L is not excessively supplied to the relay core 4c. The coating liquid storage body 5 is a fiber bundle made of polyethylene terephthalate resin. The coating liquid storage body 5 is a cylindrical member and is housed inside the front shaft 2a. Note that a film can also be wound around the outer periphery of the coating liquid storage body 5. The film may be made of a material such as polypropylene resin.

The material of the coating liquid storage body 5 is a fiber bundle made of bundles of polyester (polybutylene terephthalate, polyethylene terephthalate, polytrimethylene terephthalate, etc.) fibers, polyamide fibers, acrylic fibers, etc., or porous materials such as urethane or sponge. It can be selected as appropriate.

In this embodiment, the front end of the coating liquid supply pipe 6 is inserted into the coating liquid storage body 5. The coating liquid supply pipe 6 is a member that forms part of a coating liquid supply path that freely supplies the coating liquid L from the coating liquid tank 3 to the coating body 4 side. The coating liquid supply pipe 6 is a cylindrical member made of stainless steel (SUS304), and is a member that is open at both axial ends and penetrates in the axial direction.

The material of the coating liquid supply pipe 6 is selected from metals such as stainless steel, steel, brass, and brass, polypropylene resin, polycarbonate resin, acrylic resin, polyethylene resin, and polyamide resin, taking into consideration moldability and reactivity with the coating liquid L. , polybutylene terephthalate resin, polybutylene naphthalate resin, polyethylene naphthalate resin, vinyl chloride resin, ethylene vinyl alcohol copolymer, polyacrylonitrile resin, fluororesin, polyacetal resin, polyethylene terephthalate resin, polystyrene resin, ABS resin, silicone resin , an elastomer, or a composite material containing these resins can be appropriately selected.

A compressed portion 5a is formed inside the coating liquid storage body 5 in this embodiment. In the compression part 5a, the rear part of the relay core 4c which constitutes the rear part of the application body 4 and the front part of the application liquid supply pipe 6 are inserted into the application liquid storage body 5, and the application liquid storage body 5 is connected to the rear end surface of the relay core 4c and the application liquid supply pipe 6. It is formed by being pressed against the front end surface of the liquid supply pipe 6. Since the compression part 5a is a part where the fibers are denser than other parts in the coating liquid storage body 5, a higher capillary force acts than in parts other than the compression part 5a, so that the coating liquid L is transferred to the coating liquid supply pipe. 6 to the relay core 4c.

2 is an enlarged view of part A in FIG. 1, and FIG. 3 is an external perspective view of the relay member 7. A relay member 7 is arranged between the coating liquid tank 3, the coating liquid storage body 5, and the coating liquid supply pipe 6. The relay member 7 is a cylindrical member made of polypropylene resin. The relay member 7 is inserted from the rear open end of the front shaft 2a and is coupled to the front shaft 2a in a press-fit relationship. Two air tight ribs, which are circumferential protrusions, are provided on the inner wall of the front shaft 2a near the opening into which the relay member 7 is inserted, and the front shaft 2a and the relay member 7 are connected in a press-fit relationship. By doing so, so-called air tightness is achieved between the inner wall of the front shaft 2a and the outer wall of the relay member 7. Note that the relay member 7 can also be molded integrally with the coating liquid supply pipe 6 so that the flow path can be configured as one part.

The relay member 7 is a member in which a through hole 7a is formed, which forms a part of a coating liquid supply path that freely supplies the coating liquid L from the coating liquid tank 3 to the coating body 4 side. The through hole 7a is formed so as to open at both axial ends of the relay member 7 and penetrate through the relay member 7 in the axial direction.

A circumferential groove 7b is formed in the relay member 7. The circumferential groove 7b is open to the coating liquid tank 3 side. The circumferential groove 7b circumferentially surrounds the through hole 7a within the axial range in which the through hole 7a is formed, from the opening end on the coating liquid tank 3 side that forms the entrance of the through hole 7a toward the coating body 4 side. I'm here. In other words, the relay member 7 has a multi-cylinder structure in which the inner cylinder 7c and the outer cylinder 7d, which are separated by the circumferential groove 7b, are joined on the applicator 4 side. The circumferential groove 7b is formed between the outer wall of the inner tube 7c and the inner wall of the outer tube 7d. The circumferential groove 7b reduces the radial thickness of the inner cylinder 7c that forms the through hole 7a in the relay member 7.

The relay member 7 is formed with a protrusion 7e extending into the coating liquid tank 3 from the opening end on the coating liquid tank 3 side (the opening end on the coating liquid tank 3 side of the inner cylinder 7c). The vibration generated by the collision between the protrusion 7e and the stirring body 3a is easily transmitted to the inner cylinder 7c, which has a small radial thickness, and by extension to the through hole 7a. When the coating liquid L flows into the through hole 7a from inside the coating liquid tank 3, a liquid film is likely to be formed temporarily at the entrance of the through hole 7a or at the midpoint in the axial direction due to the narrow radial direction. The vibration transmitted from 7e can make it easier to remove the liquid film, and the applicator 1 can discharge the coating liquid L well.

In this embodiment, two protrusions 7e are provided from the open end of the inner cylinder 7c on the coating liquid tank 3 side. Each protrusion 7e is arranged at a position connected to the substantially circular entrance of the through hole 7a by an imaginary line segment of its diameter. In this way, by arranging the protrusions 7e at the farthest position in the circumferential direction from the entrance of the through-hole 7a, the vibration generated by the collision between the protrusion 7e and the stirring body 3a is transmitted to the through-hole 7a. Since the liquid is more easily transmitted in the entire circumferential direction, the liquid film can be more easily removed, and the applicator 1 can preferably discharge the coating liquid L.

The number of protrusions 7e is not limited to two, and three or more may be formed. If the ratio of the protrusions 7e occupying the circumferential range of the opening end of the inner cylinder 7c on the coating liquid tank 3 side is too high, the protrusions 7e will be too close to each other, and the edge of the coating liquid tank 3 side of the protrusions 7e, There is a possibility that a liquid film may be formed between the outer walls of 7e. Therefore, as in the present embodiment, the circumferential interval between the protrusions 7e is preferably larger than the circumferential width of one protrusion 7e, and more preferably larger than the sum of the circumferential widths of all protrusions 7e.

In this embodiment, the outer wall of the protrusion 7e is continuous with the outer wall of the inner tube 7c so as to be flush with the outer wall. On the other hand, the protrusion 7e is formed into a thick columnar shape that protrudes radially inward of the through hole 7a. By making such a shape, the shape of the entrance of the through hole 7a can be made not only circular but also a shape with unevenness in the circumferential direction, which causes a difference in the flow velocity of the coating liquid L flowing into the through hole 7a. This is preferable because it makes it difficult for the liquid film itself to occur.

FIG. 4 is a longitudinal cross-sectional view of the relay member 7 (illustrated from a viewpoint where the relay member 7 is rotated 90 degrees in the circumferential direction from the viewpoint of FIG. 2). The radial thickness of the inner cylinder 7c of the relay member 7, which is the part where the through hole 7a is formed, decreases from the application body 4 side toward the opening end on the application liquid tank 3 side, which forms the entrance of the through hole 7a. It has become. The entrance of the through hole 7a is the place where the flow path suddenly narrows (a flow path is generated) when the coating liquid L flows in from inside the coating liquid tank 3, so a liquid film is likely to form. With this configuration, the vibration generated by the collision between the protrusion 7e and the agitator 3a is easily transmitted to the entrance of the through hole 7a, making it easier to remove the liquid film, so that the coating liquid L can be discharged well. It is preferable that the applicator 1 can be made into a suitable applicator 1. The configuration in which the thickness decreases from the application body 4 side toward the opening end on the coating liquid tank 3 side that forms the entrance of the through hole 7a is such that at least the opening end on the coating liquid tank 3 side of the inner cylinder 7c has a radial thickness. It only needs to be the smallest, and the thickness in the radial direction does not need to be thick toward the open end of the inner cylinder 7c on the applicator 4 side. In other words, the thickness in the radial direction only needs to decrease from the midpoint in the axial direction of the inner cylinder 7c toward the opening end on the coating liquid tank 3 side, as in the present embodiment.

The radial thickness of the inner cylinder 7c has a tapered shape that gradually decreases toward the open end on the side of the coating liquid tank 3 as in this embodiment, and a region with a constant radial thickness that continues in the axial direction. A stepped shape may be adopted in which the thickness in the radial direction gradually decreases toward the open end on the liquid tank 3 side.

In this embodiment, the radial thickness of the protrusion 7e also decreases from the application body 4 side toward the application liquid tank 3 side. This is preferable because it becomes easier for the coating liquid L to flow in through the through hole 7a, the protrusion 7e itself does not become too thick, and vibrations generated by collision with the agitator 3a are easily transmitted. Like the inner cylinder 7c, the thickness of the protrusion 7e in the radial direction decreases from the midpoint in the axial direction toward the coating liquid tank 3 side.

FIG. 5 is a side view of the relay member 7 (the internal structure is shown with broken lines). Among the open ends on the coating liquid tank 3 side of the relay member 7, the open end on the coating liquid tank 3 side of the inner cylinder 7c, which is the open end on the coating liquid tank 3 side that forms the entrance of the through hole 7a, is the one that is the most open end on the coating liquid tank 3 side. It protrudes toward the tank 3 side. That is, the open end of the inner tube 7c on the coating liquid tank 3 side protrudes more toward the coating liquid tank 3 than the end of the outer tube 7d on the coating liquid tank 3 side. Since the outer cylinder 7d is connected to the inner cylinder 7c on the application body 4 side, there is a distance from the protrusion 7e, and vibrations generated when the protrusion 7e collides with the agitator 3a are difficult to be transmitted. By doing so, the coating liquid L flows more easily into the through hole 7a than the circumferential groove 7b, and a large liquid film is formed on the end of the outer cylinder 7d on the side of the coating liquid tank 3 to cover even the through hole 7a. becomes less likely to occur. Therefore, it is only necessary to remove the liquid film that is likely to form in the through-hole 7a, and the applicator 1 that can discharge the coating liquid L favorably can be obtained, which is preferable.

The materials for each resin molded product are selected from polypropylene resin, polycarbonate resin, acrylic resin, polyethylene resin, polyamide resin, polybutylene terephthalate resin, polybutylene naphthalate resin, etc., taking into consideration moldability and reactivity with coating liquid L. Polyethylene naphthalate resin, vinyl chloride resin, ethylene vinyl alcohol copolymer, polyacrylonitrile resin, fluororesin, polyacetal resin, polyethylene terephthalate resin, polystyrene resin, ABS resin, silicone resin, elastomer, or composite materials containing these resins, etc. can be selected as appropriate. Furthermore, depending on the coating liquid L used, various coatings, printing, etc. can be applied to the inner wall surface and/or outer wall surface of each member, taking reactivity, permeability, etc. into consideration.

1 Applicator 2 Shaft cylinder 2a Front shaft 2b Rear shaft 3 Coating liquid tank 3a Stirring body 3b Rib 4 Applicator body 4a Brush tip 4b Fixed tube 4c Relay core 5 Coating liquid storage body 5a Compressing part 6 Coating liquid supply pipe 7 Relay member 7a Through hole 7b Circumferential groove 7c Inner cylinder 7c
7d Outer cylinder 7e Protrusion

Claims (3)

A coating liquid tank that directly accommodates the coating liquid and the stirring body, a coating body that applies the coating liquid, and a through hole that forms a coating liquid supply path that freely supplies the coating liquid from the coating liquid tank to the coating body side are formed. An applicator having at least a relay member disposed therein, the relay member having a through hole opening toward the coating liquid tank side and extending from the opening end on the coating liquid tank side forming an entrance of the through hole to the coating body side. An applicator in which a circumferential groove circumferentially surrounds a through hole within the formed axial range, and a protrusion extending from an open end on the coating liquid tank side into the interior of the coating liquid tank. The applicator according to claim 1, wherein the radial thickness of the portion of the relay member where the through hole is formed becomes smaller toward the opening end on the coating liquid tank side that forms the entrance of the through hole. The coating device according to claim 1 or 2, wherein among the coating liquid tank side opening ends of the relay member, the coating liquid tank side opening end forming the entrance of the through hole protrudes most toward the coating liquid tank side. Ingredients.

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