JP2014037074A - Liquid applicator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid applicator which promotes liquid flow to a liquid absorbing body in order to increase a length of application at a time.SOLUTION: A valve type liquid applicator A comprises a valve mechanism 40 disposed between a cylinder 10 for storing liquid and an application member 30. The valve mechanism 40 comprises a valve stem 41 which moves backward when the application member 30 moves backward. When the application member 30 is pushed, the valve stem moves backward and a valve body 41a formed in the valve stem 41 moves apart from a valve seat 43b of the valve seat body, which supplies liquid in the cylinder 10 to the application member 30. A gap 36 is formed between the outer periphery of the valve stem 41 and the inner periphery of a liquid absorbing body 35, and the inner diameter of the valve seat body 43 is formed larger than the inner diameter of the liquid absorbing body 35 so that a liquid storing part 45 is formed in the valve seat body 43 surrounded by the rear end of the liquid absorbing body 35 and the outer periphery of the valve stem 41.

Description

  The present invention relates to a writing instrument such as a marking pen for applying ink, or a cosmetic applicator for applying nail polish, liquid cosmetics, and other liquid applicators for applying other liquids. The present invention relates to a valve-type liquid applicator provided with a valve mechanism for supplying the liquid to a coating member such as a pen core.

  2. Description of the Related Art Conventionally, various types of valve-type liquid applicators having a valve mechanism for supplying a liquid such as ink in a shaft cylinder to an application member such as a pen core have been known.

  Conventionally, as a valve-type liquid applicator X applied to a writing instrument, for example, as shown in FIG. 4, an application is provided on a shaft cylinder 1 that stores ink and a tip of a front shaft 1 a of the shaft cylinder 1. A pen core 2 as a member, a liquid storage body 3 for storing ink provided on the outer periphery of the rear side of the pen core 2, and a valve mechanism 4 provided between the shaft cylinder 1 and the pen core 2 are provided. The valve mechanism 4 includes a valve rod 5 that can be retracted in conjunction with the retraction of the pen core 2, a spring member 6 that urges the valve rod 5 in the direction of the pen core 2, and a shaft 1 to a pen. A valve seat 7 for closing and opening the ink flow path to the core 2, and by pressing the pen core 1, the valve stem 5 is retracted to form a valve body 5 a formed on the valve stem 5. Is known which allows the ink in the shaft cylinder 1 to be supplied to the pen core 2 away from the valve seat 7a (see, for example, Patent Documents 1 and 2). There.

  However, with this type of valve-type writing instrument, even if the pen core is pressed to open the valve (pumping), the ink can penetrate only from a part of the rear end surface of the liquid occlusion body that occludes ink. Moreover, since the ink only wets from the inner side because of its permeability, the amount of liquid supplied to the coating member is not a suitable amount, the amount of liquid that can be applied or written at a time is small, and the distance that can be applied or written is also short. There is a problem that becomes.

Japanese Patent Laid-Open No. 9-58175 (FIG. 1, FIG. 2, etc.) JP 2000-309188 A (Claims, FIG. 1 etc.)

  The present invention has been made in view of the above-described problems of the prior art, and is intended to solve this problem, by promoting the wetting of liquid such as ink to the liquid storage body, and increasing the amount of liquid that can be held in the liquid storage body. It aims at providing the liquid applicator which lengthened the distance which can be apply | coated or written at once.

  As a result of diligent studies to solve the above-described conventional problems, the present inventors have found that a valve-type liquid having a valve mechanism that supplies a liquid such as ink in a shaft cylinder to a pen core or the like serving as an application member. In the applicator, the above-described liquid applicator can be obtained by providing a specific structure between the outer periphery of the valve stem and the inner peripheral surface of the liquid occlusion body and a specific structure in the valve seat body of the valve mechanism. As a result, the present invention has been completed.

  That is, the liquid applicator according to the present invention includes a shaft cylinder that stores a liquid, an application member provided at a tip portion of the shaft cylinder, a liquid occlusion body provided on the outer periphery of the rear side of the application member, and the shaft cylinder. A valve mechanism provided between the application member and the valve member, the valve mechanism being retractable in conjunction with the retraction of the application member, and a spring for urging the valve rod toward the application member And a valve seat that closes and opens the liquid flow path from the shaft cylinder to the application member, and the valve body that is formed in the valve stem by retreating the valve stem by pressing the application member is the valve seat body. The valve-type liquid applicator is configured to supply the liquid in the shaft cylinder to the application member away from the valve seat, and a gap is formed between the outer periphery of the valve stem and the inner peripheral surface of the liquid occlusion body. The inner diameter of the valve seat body is larger than the inner diameter of the liquid storage body, and the rear end side of the liquid storage body and the outer periphery of the valve stem It is characterized in that the formation of the liquid reservoir portion between the valve seat body.

  ADVANTAGE OF THE INVENTION According to this invention, the liquid applicator which promotes the wetting of the liquid to a liquid occlusion body, increases the liquid quantity which can be hold | maintained at a liquid occlusion body, and lengthened the distance which can be apply | coated at once is provided.

It is a longitudinal cross-sectional view of the liquid applicator which shows an example of embodiment of this invention. (A) is the elements on larger scale which show the principal part of the liquid applicator of FIG. 1, (b) is the sectional view on the AA line of (a), (c) is the sectional view on the BB line of (a). (D) is the elements on larger scale which show the state where the valve mechanism was opened. It is a longitudinal cross-sectional view of the liquid applicator of FIG. 1 which shows the state which attached the cap part. It is a longitudinal cross-sectional view of the conventional valve-type liquid applicator.

Embodiments of the present invention will be described below in detail with reference to the drawings.
1-3 is each drawing of the liquid applicator which shows an example of embodiment of this invention.
The liquid applicator A of the present embodiment is applied to a marking pen type valve-type writing instrument, and as shown in FIGS. 1 to 3, a shaft cylinder 10 serving as an applicator main body and a pen core as an application member. 30, a liquid storage body 35 that stores ink, a valve mechanism 40, and a cap unit 60.
The shaft tube 10 is formed of, for example, a thermoplastic resin, a thermosetting resin, glass, or the like, and has a bottomed cylindrical rear shaft 11 for storing ink for writing instruments such as water-based ink and oil-based ink, and a pen. And a tip shaft 20 for slidingly holding the core 30.
The rear shaft 11 is formed into a bottomed cylindrical body using, for example, a synthetic resin made of PP or the like, and functions as a writing instrument body. The entire rear shaft 11 and the front shaft 20 are formed to be opaque or transparent (and translucent), but any of them may be adopted from the viewpoint of appearance and practical use. Further, the front shaft 20 is fixed to the outer peripheral portion of the opening 12 of the rear shaft 11 by screwing or the like.

  The front shaft 20 has a cylindrical large-diameter portion 21 that is screwed to the outer peripheral portion of the opening 12 of the rear shaft 11 on the rear side, and a cylindrical tube that fits a cylindrical medium-diameter portion 22 and a pen core 30 on the front side. And is formed of a synthetic resin made of PP or the like, for example.

The pen core 30 includes, for example, natural fibers, animal hair fibers, polyacetal resins, polyethylene resins, acrylic resins, polyester resins, polyamide resins, polyurethane resins, polyolefin resins, polyvinyl resins, polycarbonate resins, Parallel fiber bundles made of one or two or more combinations of polyether resins, polyphenylene resins, etc., fiber cores such as felt, or fiber cores obtained by resin processing of these fiber bundles, various plastic powders, etc. As a shape, for example, a substantially cylindrical shape with a rounded tip, and both side surfaces on the tip side of the columnar shape as in this embodiment are used as a knife. The pen core made into the cut shape can be mentioned.
The pen core 30 is held in the small diameter portion 23 of the front shaft 20, and the tip end side of the pen core has a structure exposed from the small diameter portion 23.

The liquid occlusion body 35 occludes ink flowing out from a valve mechanism 40, which will be described later. The liquid occlusion body 35 is fitted into the cylindrical middle diameter portion 22 of the front shaft 20, and is disposed on the outer periphery on the rear side of the pen core 30 serving as an application member. It is provided to touch.
The liquid occlusion body 35 is composed of fiber bundles such as natural fibers and synthetic resin fibers, fiber bundles obtained by processing fiber bundles such as felt, or resin particle porous bodies made of hard sponge, resin particle sintered bodies, and the like. It is what is done.

The valve mechanism 40 is provided between the shaft cylinder 10 and the pen core 30 serving as an application member, and a valve rod 41 having a hollow portion 41a that can be retracted in conjunction with the retraction of the pen core 30; A spring member 42 that urges the valve stem 41 toward the pen core 30, a cylindrical valve seat body 43 that closes and opens a liquid flow path from the shaft cylinder 10 to the pen core 30, and the valve stem 41 And a valve cylinder portion 44 that slidably holds.
The valve stem 41 has a valve body 41 b and a stepped portion 41 c that holds the front end of the spring member 42, and has a structure in which the tip end abuts against the rear end surface of the pen core 30. The valve seat body 43 includes a flange portion 43a that is fixed to the inner surface of the shaft tube 10, a cylindrical portion 43b, and a valve seat 43c. The valve tube portion 44 includes a flange portion 44a fixed to the inner surface of the shaft tube 10, a tubular portion 44b, a slide hole 44c into which the rear end portion of the valve rod 41 is slidably inserted, and a spring member 42. It has a step 44d for holding the rear end and an ink outflow hole (not shown).

Further, in the present embodiment, as shown in FIGS. 1 and 2A, a gap 36 is formed between the outer periphery of the valve rod 41 and the inner peripheral surface of the liquid storage body 35, and surrounded inner diameter _{T 2} of the said valve seat body 43 to the outer periphery of the larger than the inner diameter _{T 1} of the liquid absorbing material _{35 (T 1 <T 2)} , the rear end 35a and the valve stem 41 of the liquid absorbing material 35 A liquid reservoir 45 is formed in the valve seat body 43.

The gap portion 36 is formed to allow ink to permeate directly to the side surface of the liquid occlusion body 35, and thereby, wetting of the ink into the liquid occlusion body 35 can be promoted. The width direction and the length in the longitudinal direction of the gap 36 are the liquid occlusion amount of the liquid occlusion body 35, the liquid occlusion amount of the pen core 30, the ink wettability of the pen core 30, the pumping property of the pen core 30, and the liquid. Considering the volume of the reservoir 45 and the like, it is set to a suitable length (diameter difference from the pen core 30 of 0.03 mm or more, length 4.5 mm or more).
Further, the inner diameter T ₂ of the valve seat body 43 is larger than the inner diameter T ₁ of the liquid storage body 35 (T ₁ <T ₂ ), and the rear end side 35 a of the liquid storage body 35 and the outer periphery of the valve rod 41 are arranged. A liquid reservoir 45 is formed in the enclosed valve seat body 43. The volume of the liquid reservoir 45 is preferably larger than the volume of the gap 36. If a single pumping operation (valve opening operation) is performed by the liquid reservoir 45, the ink accumulated in the liquid reservoir 45 cannot flow into the gap 36 at a time, so that it can also be wetted from the upper surface of the sponge. Moreover, ink wetting can be promoted by making the ink in the liquid reservoir 45 always in contact with the liquid occlusion body 35 regardless of the next pumping operation.

  As shown in FIGS. 1 and 2 (a), the valve mechanism 40 presses the pen core 30 serving as the application member, so that the valve rod 41 moves backward against the urging force of the spring member 42. The valve body 41b formed on the valve stem 41 is separated from the valve seat 43c of the valve seat body 43, and the ink in the shaft cylinder 10 is supplied to the pen core 30 serving as an application member. Is released, the elastic force of the spring member 42 causes the valve body 41b to come into contact with the valve seat 43c of the valve seat body 43, thereby closing the ink flow from the shaft cylinder 10 to the pen core 30. Reference numeral 50 denotes a stirring ball that stirs a liquid such as ink stored in the shaft tube 10.

  As shown in FIG. 3, the cap portion 60 is detachably attached to the front shaft 20 by fitting or the like to the outer peripheral surface of the small-diameter portion 23, and an inner cap portion 61 that protects the pen core 30 serving as an application member. And a cylindrical outer cap portion 62 and a crown 63, and the crown 63 is mounted by a locking portion 64.

In the liquid applicator A of the present embodiment, formed as described above, the inner diameter T ₂ of the said valve seat body 43 larger than the inner diameter T ₁ of the liquid absorbing material _{35 (T 1 <T 2)} , the liquid absorbing material 35 between the liquid reservoir 45 formed in the valve seat 43 surrounded by the rear end side 35a of the valve 35 and the outer periphery of the valve rod 41, and between the outer periphery of the valve rod 41 and the inner peripheral surface of the liquid occlusion body 35. Since the formed gap portion 35 is configured to communicate, when the pen core 35 is pressed (pumping operation), the ink can permeate from a part of the side surface and the rear end surface of the liquid storage body 35, Moreover, since the ink wetting can be promoted by making the ink in the liquid reservoir 45 always in contact with the liquid storage body 35 regardless of the opening of the next valve mechanism 40, the amount of liquid that can be held in the liquid storage body The next pumping action. The distance that can be written or applied at a time can be increased.

The present invention is not limited to the above-described embodiment, and can be modified into various forms without departing from the gist of the present invention.
In the above-described embodiment, the writing instrument using the ink for the writing instrument has been described in detail, but the ink is a nail polish liquid, a liquid cosmetic, and the like, and the cosmetic is a coating body including a pen core made of a porous body such as a sponge, Other liquids may be generally applied.
Moreover, in the writing instrument A of the said embodiment, although cross-sections, such as an axial cylinder used as an applicator main body, were formed in cylindrical shape, you may make it irregular shapes, such as a triangle shape, an ellipse shape, and a square shape more than a rectangle. .

  Next, the present invention will be described in more detail with reference to examples, but the present invention is not limited to the following examples.

[Example 1]
(Configuration of liquid applicator: based on FIGS. 1 and 2)
Configuration of each member:
Pen core: Acrylic fiber core, porosity 72%, length 27mm, φ: 7.9mm, both sides of the front end knife-cut processing Ink occlusion body: urethane sponge, porosity 75%, external shape: φ16 × 14mm (cavity Part; φ8.3 × 14mm)
Valve stem, valve seat, valve cylinder: polyethylene Spring member: stainless steel shaft cylinder, tip axis: made of polypropylene Gap part: volume 0.20 ml (one side gap 1.65 mm, length 8 mm)
Liquid reservoir: Volume 0.47ml
[Example 2]
(Configuration of liquid applicator: based on FIGS. 1 and 2)
Configuration of each member:
Pen core: PET fiber core, porosity: 66%, length: 21.5 mm, φ: 4.5 mm, both sides of the front end face are knife cut Ink occlusion body: urethane sponge, porosity: 64%, external shape: φ10 × 7 mm (Cavity: φ4.5 × 7mm)
Valve stem, valve seat, valve cylinder: polyethylene Spring member: stainless steel shaft cylinder, tip axis: made of polypropylene Gap: 0.015 ml (one side gap 0.2 mm, length 4.8 mm)
Liquid reservoir: Volume 0.045ml

(Ink composition)
A commercially available concealing ink was used as the ink.

  In the liquid applicator according to the first and second embodiments of the present invention configured as described above, writing or writing at a time can be performed at a time as compared with the conventional (liquid applicator of FIG. 4 and the like) without performing the next pumping operation. It has been found that the distance that can be applied can be increased.

  The liquid applicator of the present invention can be suitably applied to underline pens, paint markers, oily markers, writing tools of the type called water-based markers, cosmetics such as nail polish, and liquid cosmetics.

A Liquid applicator 10 Shaft cylinder 11 Rear shaft 20 Front shaft 30 Application member (pen core)
35 Liquid Occupant 36 Clearance 40 Valve Mechanism 45 Liquid Reservoir

Claims (1)

  A shaft cylinder for storing liquid, an application member provided at the tip of the shaft cylinder, a liquid occlusion body provided on the outer periphery of the rear side of the application member, and a valve mechanism provided between the shaft cylinder and the application member The valve mechanism includes a valve rod that can be retracted in conjunction with retraction of the application member, a spring member that urges the valve rod toward the application member, and a shaft cylinder to the application member. A valve seat that closes and opens the liquid flow path, and when the application member is pressed, the valve stem is retracted and the valve body formed on the valve stem is separated from the valve seat of the valve seat, A valve-type liquid applicator for supplying liquid to an applicator member, wherein a gap is formed between the outer periphery of the valve stem and the inner peripheral surface of the liquid storage body, and the inner diameter of the valve seat body is stored in the liquid storage device. A liquid reservoir is formed in the valve seat body surrounded by the rear end side of the liquid storage body and the outer periphery of the valve stem. Liquid applicator, characterized in that form.

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