JP2001080276A - Coating tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the abutting feeling at writing due to the retreat of a tip in a free-ink type writing utensil, which supplies the ink in an ink tank little by little to a pen point tip through a ball tip valve. SOLUTION: This coating tool 1 is equipped with an ink tank 3 and a valve 6 provided at the tip part of the tank 3. The valve 6 is formed in arranging a valve element 12 in a valve chamber having an opening at its tip so as to be clogged with the valve element 12 by being pressed against the periphery of the opening through a spring 13. A step 5 is provided at the tip side of the valve 6. The rear end of the tip 5 abuts against the tip, which projects beyond the opening towards the tip side of the valve, of the element 12. In this case, the energizing force of the spring 13 at writing is set to be twice as much as the urging force of the spring 13 under the state that the coating tool is not in use.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an applicator which can be used as a writing instrument or a cosmetic tool, and more particularly to an applicator having a coating liquid such as ink or cosmetic liquid contained in a cylindrical tank. It is.

[0002]

2. Description of the Related Art The present applicant has disclosed a free ink type applicator (writing implement) having an improved structure capable of supplying ink smoothly and capable of continuous writing.
No. 495. This applicator has a cylindrical ink tank containing ink and a chip that oozes out the ink by capillary action or the like, and the ink in the ink tank is guided to the chip to be written. A valve is provided at the tip of the tank, and the valve has a spherical valve body disposed in a valve chamber having an opening at the tip,
The valve element is pressed to the opening side by a spring, the tip is provided at the tip side of the valve, and the rear end side of the tip is in contact with the valve element.

[0003] The conventional applicator described above, when not in use,
No ink is supplied since the valve body in the valve chamber is pressed toward the opening of the valve chamber by the biasing means. Further, when the tip of the chip is pressed against paper or the like during writing, the valve body is unintentionally pushed up by about 1 mm or less due to the writing pressure at the time of writing, so that the ink in the ink tank can gradually exude to the chip. Therefore, there is no ink fogging, there is no need to stop writing to supply ink to the chip, and no excessive amount of ink is supplied to the chip, and a beautiful handwriting is obtained. There is an advantage.

[0004]

In the above-mentioned conventional writing instrument, the spring has an urging force corresponding to the opening diameter, the structure and size of the valve element, etc. in order to reliably close the opening of the valve chamber by the valve element. It is designed so that the valve can be retracted by pen pressure,
That is, the urging force is set to be smaller than the pen pressure. Here, when the spring constant of the spring increases, the biasing force of the spring greatly changes due to a slight forming error or an assembling error, which adversely affects the practicality as a writing instrument. For example, it is empirically known that the writing pressure of a general marker pen type writing instrument is around 120 gf. Therefore, in this case, the biasing force of the spring is desirably about 100 gf or less. Even if there is an error of about 0.1 mm, in order to suppress the biasing force of the spring at the product shipping stage within the range of 100 ± 10 gf and obtain stable product quality, a spring constant of about 0.01 kg / mm has conventionally been used. A spring was used, and even with a large spring constant, the spring constant was at most about 0.04 kg / mm.

That is, in the above-mentioned conventional applicator, the spring constant of the spring for urging the ball is considered to be as small as possible. However, according to such a conventional writing instrument, when writing, as shown in FIG. 1 (b) of the above-mentioned conventional publication, when the ball collides with the rear seat in the valve chamber, there is a feeling of a click in the hand, I feel uncomfortable when writing.

Accordingly, the present invention provides an applicator in which a tip is retracted by writing pressure and a valve is opened to exude a small amount of application liquid in a tank to the tip, and the valve is closed only when the valve is opened. The object of the present invention is to balance the urging force of the urging member for writing with the writing pressure, thereby eliminating the sense of collision during writing and obtaining a good writing feeling.

[0007]

In order to achieve the above object, the present invention takes the following technical measures. That is, the applicator of the present invention includes a tank containing a coating liquid, and a valve provided at the tip of the tank, and the valve has a valve body that can move back and forth in a valve chamber having an opening at the tip. The valve body closes the opening by the urging force of the urging member, and a tip is provided on the distal end side of the valve, and the rear end of the tip contacts the distal end of the valve body. And the spring member has a spring constant of 0.1 kgf / mm or more. The present invention provides
The present invention is particularly usefully applied to an applicator in which a tip and a valve body are retracted by 0.01 mm to 1 mm to open a valve against the urging force of an urging member due to an application pressure (a writing pressure) during use.

According to the present invention, the biasing force of the biasing member is greatly increased by the slight retreat of the tip and the valve body due to the application pressure. Therefore, while the urging force of the urging member when the valve element closes the opening of the valve chamber is set small enough to ensure that the valve element can be retreated by the application pressure, the urging force of the urging member follows the retraction of the valve element. It can be designed so that the urging force of the urging member is balanced with the application pressure. As described above, according to the present invention, the application pressure (pen pressure) can be received by the urging force of the urging member, and the opening of the valve can be regulated to some extent without providing a receiving seat behind the valve body. In the case where a seat for regulating the retreat amount of the valve body is provided at the rear of the valve body, the impact when the valve body collides with the seat is alleviated, and a sense of collision (coping feeling) at the time of coating is reduced. Canceled, and a good writing feeling can be obtained.

For example, when the retreat amount of the tip and the valve element is 0.2
mm, and assuming a design of a writing implement used with a light writing pressure of about 30 gf, if a biasing member having a spring constant of 0.1 kgf / mm is used, the tip is retracted by 0.2 mm, The urging force of the urging member increases by about 20 gf. Therefore, if the initial urging force of the urging member (that is, the urging force when the valve element closes the valve chamber opening) is about 20 gf, the valve is opened unconsciously at the time of writing with a writing pressure of 30 gf. However, the urging member expands and contracts depending on the degree of application of the pen pressure, and the pen pressure can be substantially received by the urging member, so that a so-called hit feeling does not occur.

The application pressure (writing pressure) during use is inevitable according to the application / function of the applicator, the size, shape, material of the tip, the type of application liquid, the shape, structure, size, etc. of the valve element. And the biasing force for obtaining a sufficient sealing property to close the valve also fluctuates, so according to the design value of this application pressure,
The spring constant of the urging member and the initial urging force of the urging member can be appropriately determined. For example, the tip has a round shaft shape,
In the case of a fine writing type writing instrument whose tip diameter is 0.5 mm to 2 mm, the initial urging force of the urging member is 20 g.
It is preferably f-80 gf. Further, in the case of a writing tool of a middle character type having a tip diameter of 2 mm to 5 mm, it is preferable that the initial urging force of the urging member be 30 gf to 100 gf. In addition, the diameter of the chip is
b-type writing instrument or short side 3-10
mm and a rectangular bold type writing instrument having a long side of 5 to 20 mm, the initial urging force of the urging member is set to 50 gf to 15 gf.
It is preferably 0 gf. Further, the spring constant of the urging member can more preferably be 0.5 kgf / mm or more.

As described above, according to various structures of the applicator, the urging force of the urging member when the valve body closes the opening of the valve chamber is smaller than a predetermined force and substantially equal to the valve force. The valve body may be set to a size necessary and sufficient to close the opening of the chamber, and the valve body may be configured to be retractable until the urging force of the urging member balances the predetermined force. Here, the “predetermined force” is an application pressure (pen pressure) that is assumed to be applied to the chip when the applicator is used, and the application of the applicator, the material and thickness of the chip, The value is appropriately determined by design in consideration of various factors such as the shape.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An applicator according to the present invention includes a tank containing a coating liquid, and a valve provided at a tip of the tank, wherein the valve is provided in a valve chamber having an opening at the tip. The valve body closes the opening by the urging force of the urging member, and a tip is provided on the distal end side of the valve, and the rear end of the tip is located on the distal end side from the opening. The valve element is in contact with the tip of the protruding valve body, and retreats the chip against the urging force of the urging member by the application pressure acting on the chip at the time of application, so that the valve body separates from the opening of the valve chamber. can do. In the present invention, the applicator includes a writing implement and a makeup implement. The coating liquid may be water-based or oil-based, and an appropriate liquid depending on the application such as ink and mascara can be used. The tank is preferably cylindrical, and when storing aqueous ink in a cylindrical tank (ink storage cylinder) having an open rear end, a backflow preventing agent is disposed in the tank at the rear end of the ink. Is preferred. The present invention can be applied to an air-replacement type applicator using a bottomed cylindrical tank.

The valve body is preferably spherical, and the distal end side of the valve chamber is preferably shaped like a convergent funnel, and the diameter of the distal end opening is preferably slightly smaller than the diameter of the spherical valve body. Further, it is preferable to provide a projection in the valve chamber, which is in contact with the rear surface of the valve body, so as to prevent the valve body from completely immersing in the opening. The tip can be made of a material from which a coating liquid such as felt can ooze out due to a capillary phenomenon or a metal thin tube.

In the applicator of the present invention, when not in use, the valve body in the valve chamber is pressed toward the opening of the valve chamber by the urging means. Therefore, when not in use, the ink tank is sealed by the valve and there is no ink supply.
When the tip of the chip is pressed against paper or the like during writing, the rear end of the chip slightly pushes up the valve body to open the opening of the valve chamber. If a sphere is used as a member for closing the opening of the valve chamber,
Regardless of the posture of the member to be closed, the opening of the valve chamber can be completely closed, and a small gap for supplying ink can be secured by slightly pushing up the ball. . In addition, since the tank has a double wall structure in the outer body, it is possible to replace only the tank, and to improve the flexibility of the material and strength of the tank.

Further, in the applicator of the present invention, the urging force of the urging member against the valve body when the urging member is deformed due to the application pressure acting on the chip, is such that the valve body has an opening in the valve chamber. The urging member is configured to be 1.5 times or more the urging force of the urging member when pressed. The application pressure is not limited to a specific pressure, but is a pressure determined by design as appropriate, and is an appropriate value according to the thickness, hardness, material type, and the like of the pen tip. Further, as the urging member as described above, it is possible to use a spring having a spring constant of 0.1 kgf / mm or more, more preferably 0.5 kgf / mm or more.

According to the present invention, at the time of application (at the time of writing)
The urging force of the urging member sharply increases due to the deformation of the urging member, so that it is possible to receive the application pressure (pen pressure) by this urging force, and it becomes unnecessary to provide a seat behind the valve body.
Further, in the case where the seat is provided behind the valve body, the impact when the valve body strikes the seat is reduced, and the sense of abutment (coarse feeling) at the time of application is eliminated, and a good writing feeling is obtained. . Also, when the valve is closed, the valve body is pressed against the opening with a biasing force that is less than half of the writing force, so that the valve can be reliably opened at the time of application, and ink can be smoothly supplied to the valve body. Is possible.

In the above applicator, the retreat distance from the opening of the valve body at the time of application is 0.01 mm, 0.0 mm or less.
2mm, 0.05mm, 0.1mm, 0.2mm, 0.
Appropriate design values such as 3 mm, 0.4 mm, 0.5 mm or 1.0 mm can be used, and the upper limit is also 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm,
An appropriate design value such as 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, or 1.0 mm can be used. Preferably, the retreat distance from the opening of the valve body at the time of application is 0.
1 mm to 1 mm, more preferably 0.1 mm.
It can be 1 mm to 0.3 mm.

The urging force of the urging member when the valve body is pressed against the opening of the valve chamber is 10 gf or more and 20 gf or more.
f or more, 30 gf or more, 40 gf or more, 50 gf or more,
60 gf or more, 70 gf or more, or 80 gf or more, and 20 gf or less, 30 gf or less, 40 g
f or less, 50 gf or less, 60 gf or less, 70 gf or less,
80 gf or less, 90 gf or less, 100 gf or less, 200
gf or less or 500 gf or less.

Further, when the urging member is deformed due to the application pressure acting on the chip, the urging force of the urging member is 30 gf or more, 40 gf or more, 50 gf or more, 60 gf or more, 70 gf or more.
gf or more, 80 gf or more, 90 gf or more, 100 gf or more, 120 gf or more, 140 gf or more, 160 gf or more, 180 gf or more, 200 gf or more, and 70 gf or less, 80 gf or less, 90 gf or less, 100 gf or less, 110 gf or less, 120 gf or less Hereinafter, it can be 130 gf or less, 140 gf or less, 150 gf or less, 160 gf or less, 170 gf or less, 180 gf or less, 190 gf or less, 200 gf or less, 300 gf or less, 400 gf or less, or 500 gf or less.

Further, according to the present invention, the urging force of the urging member when the valve body is pressed against the opening of the valve chamber is 40 gf to 6 gf.
0 gf, and the biasing member is configured such that the biasing member exerts a biasing force on the valve body of 120 gf to 180 gf when the tip is retracted by 0.2 mm and the biasing member is deformed. Things. According to this, the valve element is separated from the opening at a retreat distance of 0.2 mm, which hardly gives a sense that the chip is retreating at the time of application, and a small amount of ink can be supplied to the chip from this slight gap, At this time, an urging force of 120 gf to 180 gf equivalent to a general writing pressure of a person acts on the valve body, so that the writing member can receive the writing pressure by the urging member, and the tip or the valve body hits any member. To prevent
Even if it strikes, it can eliminate the feeling of crush at the time of the opposition. Further, when the valve is closed, it is significantly less than the human writing pressure.
Since only the urging force of gf to 60 gf acts on the valve body, the valve can be reliably opened at the time of writing. The present invention can be particularly usefully applied to a pen-type writing instrument employing a fiber bundle chip as the chip. Further, a non-linear spring can be used as the biasing member of the present invention.

[0021]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 illustrates a fiber bundle tip pen 1 using an aqueous ink as a first embodiment of the applicator of the present invention. The applicator 1 includes an outer cylinder 2 (outer body) serving as a pen body, an ink tank 3, a tip plug 4, a felt tip 5, a valve 6, a tail plug 7, and a closing member 8.

The outer cylinder 2 is a cylindrical member made of a resin such as polypropylene or a metal such as aluminum or stainless steel, and is preferably made of a transparent or translucent hard synthetic resin. The distal end side of the outer cylinder 2 is gradually thinned, and the portion of the distal end of the outer cylinder 2 having the smallest diameter is a tip holding cylinder portion 2b.
The tip 5 is fitted to the tip holding cylinder portion 2b at the tip of the outer cylinder 2 so as to be able to slide back and forth without play. Further, in the outer cylinder 2, an outside air introduction hole can be formed at an appropriate portion. In the illustrated embodiment, the tip holding cylinder 2
A longitudinal groove 25 extending forward and backward is formed on the inner surface of b, and a rib 26 for securing a gap between the urethane foam 16 described later and the inner peripheral surface of the outer cylinder 2 is provided to open at the tip. Although the outside air introduction hole is formed, an outside air introduction hole may be formed in the peripheral wall of the outer cylinder 2. A cap (not shown) can be detachably attached to the tip of the outer cylinder 2.

The ink tank 3 is a cylinder made of a resin such as polypropylene or a metal such as aluminum or stainless steel, and is disposed inside the outer cylinder 2.
The ink tank 3 is hollow so that the ink can be stored therein. The outer diameter of the ink tank 3 is smaller than the inner diameter of the outer cylinder 2, so that a space is formed between the ink tank 3 and the outer cylinder 2.

The tip plug 4 is made of a hard synthetic resin such as polypropylene or a metal, and is disposed at an intermediate portion of the outer cylinder 2 in the axial direction.
An ink circulation hole 9 penetrating in the axial direction is formed at the center of the shaft. The rear end side 4a of the tip plug 4 is cylindrical,
A cylindrical seal member 20 is fitted on the outer periphery of “a”.
The seal member 20 is interposed between the outer surface of the rear portion 4a of the tip plug 4 and the inner surface of the ink tank 3, and has a function of preventing ink leakage.

Further, in this embodiment, the sealing member 20
Is used as a constituent material of the ink. That is, in the case of a water-based ink, water vapor having a transmission coefficient of 2.5 to 10.0 cm ³ · cm / cm ² · s · Pa, more preferably 3.0 cm ³ · cm / cm ² · s · Pa or more A material having a coefficient, for example, a porous material such as silicon rubber can be used as a constituent material of the seal member 20. Silicon rubber or its copolymer has a large intermolecular chain distance, a sparse structure, and a high degree of molecular flexibility, and thus has relatively high gas permeability. Therefore, even in the case of oil-based ink, the seal member 20 can be made of silicone rubber. The water vapor (vaporized gas of the ink solvent) that has passed through the seal member 20 fills the space around the chip 5 and has an effect of preventing the evaporation of the ink solvent from the chip 5.

The rear end 4a of the tip plug 4 is
0 is fitted inside the front end of the tank 3. A large-diameter portion 4 protruding outward in the axial direction is provided at an intermediate portion in the axial direction of the stopper 4.
The large diameter portion 4b is fitted in the outer cylinder 2 and the stepped portion 2 provided on the inner peripheral surface of the outer cylinder 2 is provided.
a from behind. In addition, as shown in FIG. 2, a communication hole 10 for guiding gas that has passed through the seal member 20 to the space around the chip 5 is formed in the large diameter portion 4b. Although the shape and number of the communication holes 10 are not particularly limited, a plurality of fan-shaped holes are formed in the circumferential direction in the illustrated embodiment. The tip side 4c of the tip plug 4 is a large diameter portion 4
b protrudes forward from the front surface.

The valve 6 is a cylindrical metal or resin housing 11 (valve chamber) having an inner surface of a distal end opening serving as a valve seat.
And a spherical valve body 12 held in the housing 11.
And a spring 13 for urging the valve body 12 toward a valve seat.
(Biasing member). The housing 11 is fitted in the ink flow hole 9 and is thereby held by the plug 4. Thus, the plug 4 is provided with the valve 6 and the ink tank 3.
Is a holding member.

The housing 11 has the same structure as the tip of the ballpoint pen, that is, is constituted by a cylindrical body whose tip is reduced in diameter.
Is provided, and the tip of this space has a tapered shape. An opening 14 is provided at the tip of the housing 11. This opening 1
The diameter of 4 is preferably about 50% to 95% of the diameter of the valve body 12. Also, the outer diameter of the tip end of the cylindrical body forming the housing 11 is smaller than the outer diameter of the rear end of the tip 5,
The valve element 12 is brought into contact with the center of the rear end of the chip 5.

The internal structure of the valve housing 11 will be described in more detail. As shown in FIGS.
A convex portion 15 is formed at a predetermined position in the front-rear direction on the inner surface of the projection 1 so as to protrude radially inward. A plurality of the protrusions 15 are provided in the circumferential direction, and a slit penetrating back and forth is formed between the protrusions 15. The front side surface (lower side surface in FIGS. 3 and 5) of the convex portion 15 is tapered so as to gradually incline rearward toward the center of the shaft. It constitutes a seat. This seat and opening 1
4, a space is formed in which the valve element 12 can move slightly back and forth. When the valve element 12 is pushed backward by the tip 5 (shown by a two-dot chain line in FIG. 5), the opening is formed. 14 is opened and ink is supplied to the chip 5. Note that the present invention does not necessarily require the convex portion 15 (seat), but also includes a case where the seat is not formed. Also, the structure of the seat may be a flange without slits,
Also, a plurality of recesses may be formed in the front surface of the flange in the circumferential direction so that an ink flow passage is formed between the valve body and the seat when the valve body comes into contact with the seat.

The amount of movement of the valve body 12 from the state in which the valve body 12 closes the front end opening 14 to the state in which the valve body 12 comes into contact with the rear end seat (convex portion 15) is of the type shown in FIG. In a writing instrument, the thickness can be preferably set to 0.01 mm to 0.5 mm, and more preferably, can be designed within a range of 0.02 mm to 0.2 mm. In the case of an air-replacement type writing instrument that uses an ink tank whose rear end side is closed as the ink tank, the moving amount can be preferably 0.1 mm to 2 mm, and more preferably 0.1 mm to 1 mm. Can be designed. The inside diameter of the internal space of the housing 11 is slightly larger than the diameter of the valve body 12 so that a small amount of ink can flow between the valve body 12 and the inner surface of the housing 11.

The valve body 12 may be made of a resin, but is preferably made of a metal such as that used for a normal ballpoint pen. The diameter of the valve element 12 can be 0.3 mm to 20 mm, and more preferably 0.6 mm to 2 mm. In addition, the valve body 12 is not limited to a spherical one, and may have various structures and forms. For example, a conical valve body may be employed.

The spring 13 is arranged behind the valve body 12. As the spring 13, a thin wire such as nylon tex or wire harness can be used. In the illustrated example, a compression coil spring is used. The spring 13 has a rear end 4 a at the rear end
It engages with the internal step, and the tip is the valve 1 inside the housing 11.
It is in contact with 2. Therefore, the valve body 12 is
The valve body 12 is pressed against the periphery of the opening 1, and a part of the valve element 12 on the tip side protrudes from the opening 14.

In the present embodiment, the spring 13
The urging force when the valve body 12 is pressed by the opening 14 is 40 gf to 60 gf (preferably about 50 gf).
And the tip 5 and the valve body 12 are 0.2 mm
A spring constant is employed so that the biasing force when the vehicle retreats is 120 gf to 180 gf (preferably about 150 gf). For example, if the initial urging force is 40 gf and the urging force at the time of retreating 0.2 mm is 180 gf, the spring constant is 0.7 kgf / mm. Further, if the initial urging force is 60 gf and the urging force at the time of retreating 0.2 mm is 120 gf, the spring constant is 0.3 kgf / m
m. That is, in the present embodiment, 0.3 kgf / mm to
A spring 13 having a spring constant of 0.7 kgf / mm is used.

The chip 5 is made of a known resin or fiber as a material, and oozes ink by capillary action or the like. The chips 5 may be all formed of a single material, or may be formed by joining a resin chip and a relay member of a fiber bundle. Further, it may be a so-called brush pen type chip or a chip formed of a thin metal tube. In the case of a pen-type tip, the writing pressure is inevitably very low and the ink consumption is relatively large. Therefore, the spring 13 having a spring constant (approximately 0.1 kgf / mm) corresponding to this is used.
Is used.

The tip of the tip 5 projects forward from the tip of the outer cylinder 2 so that characters and the like can be written, and the rear end of the tip 5 contacts the valve element 12 of the valve 6 described above. In contact. The tip 5 has a small-diameter shaft portion 5a on the tip side.
And a large-diameter shaft portion 5b on the rear end side. The outer diameter of the large-diameter shaft portion 5b on the rear end side of the tip 5 is smaller than the inner diameter of the outer cylinder 2, so that a space is formed between the rear end side of the tip 5 and the outer cylinder 2. It is. The space around the rear part of the tip 5 communicates with the distal end face of the seal member 20 via the communication hole 10 of the tip plug 4 described above.

The outer surface of the tip rear end 5b is
However, as described above, since the solvent of the ink filled in the tank 3 evaporates and passes through the seal member 20 to fill the space inside the outer cylinder 2 as described above, the chip 5 Evaporation of ink from the ink can be suppressed.

A cylindrical urethane foam 16 is incorporated in the outer cylinder 2 behind the tip holding cylinder 2b. The urethane foam 16 functions as an ink occluding body that absorbs excess ink supplied to the chip 5 and replenishes the chip 5 with ink from the urethane foam 16 when the ink of the chip 5 runs short. . Further, the urethane foam 16 is engaged with a step between the small diameter portion 5a and the large diameter portion 5b of the chip 5, and has a function of lightly urging the chip 5 rearward. Thus, the urethane foam 16 constitutes a second urging means for the chip. The urging force of the urethane foam 16 is equivalent to the spring 13
It is weaker than the urging force of the (first urging means) and has a function of suppressing rattling of the chip 5 while preventing the valve 6 from opening when not in use.

The ink tank 3 contains a coating liquid such as a water-based ink. Further, a closing member 8 is built in the ink tank 3. The closing member 8 in the illustrated example is composed of a float 8a made of rubber or resin, and a backflow preventing agent 8b such as boribene, which covers the outer surface of the float 8a.
The closing member 8 is located at a boundary portion on the rear end side of the ink, and the ink is sealed by the closing member 8. Closure material 8
Slides toward the tip stopper 4 as the ink is consumed.

A tail plug 7 is fitted to the rear end of the outer cylinder 2. The tail plug 7 has a lid 7a and a cylinder 7b protruding forward from the lid 7a. The cylindrical portion 7 b has an outer diameter that just fits the outer cylinder 2 and is fitted to the outer cylinder 2. In addition, an external air introduction port can be formed in the tail plug 7.

Next, the operation of the applicator 1 of this embodiment will be described. When the applicator 1 of the present embodiment is not used,
The valve body 12 is pressed against the opening 14 of the housing 11 by the spring 13 and the valve 6 is closed. Therefore, there is no supply of ink from the ink tank 3 to the chip 5.

At the time of writing, the tip 5 is pressed by the pen pressure, and the valve body 12 moves rearward by the force to open the opening of the housing 11. In the present embodiment, the valve element 12
Is about 1 mm or less, and the force required to open the valve is about 40 to 60 gf, so that the user hardly feels that the tip has moved. Further, the valve 6 is opened by writing pressure, and it is empirically known that the writing pressure of the writing implement of the type shown in the drawing is usually 80 gf or more. It is opened by writing pressure, and it is not necessary to interrupt the writing and press the tip hard as in the past.

Further, in the above-mentioned applicator 1, as shown in FIG.
It is located on the rear end side with respect to the tip end of the valve body 12 projecting to the tip end side from 4 and on the tip end side with respect to the tip end of the valve housing 11 (tubular body). The distance between the rear end of the tip 5 and the front end of the tip plug 4 when not in use is about 0.2 mm or more and 1 mm or less. With such a configuration, when a large writing pressure is applied, when the tip 5 moves to the rear end side by the writing pressure, the outer peripheral portion of the rear end face of the rear portion 5b of the tip 5 comes into contact with the front end face of the tip plug 4, and The movement of the chip 5 backward is restricted as described above. Then, in the center of the rear end face of the chip 5,
Since a pressure higher than the urging force of the spring 13 does not act and a large writing pressure can be received by the tip plug 4, the rear end of the tip 5 can be prevented from being crushed. In the applicator 1 of the present embodiment, if the rear end face of the chip 5 is crushed, the valve element 12 cannot be retracted and the supply of ink is cut off. Can greatly improve practicability and durability.

The chip 5 has a thickness of 120 gf to 180 gf.
When the pen pressure is applied up to 0.2 mm, the tip 5
As it retreats, the urging force of the spring 13 becomes equal to the above-mentioned writing pressure, and the writing pressure can be received by this urging force. Therefore, at the time of writing with normal writing pressure, the rear end of the tip 5 and the front end of the tip plug 4 do not collide with each other. it can.

[0045]

In the applicator of the present invention, when not in use, the valve element in the valve chamber is pressed toward the opening of the valve chamber by the urging means, so that no ink is supplied, and the tip of the tip is written during writing. When pressed against paper or the like, the valve body is pushed up by the writing pressure at the time of writing, so that a small amount of ink can be supplied to the chip. Therefore, the applicator of the present invention does not have ink fogging and does not require an operation of stopping writing to supply ink to the chip. Further, since the urging force of the urging member of the valve element is rapidly increased when the valve element is slightly retracted, the applicator of the present invention can receive the application pressure by this urging force, and the tip retreats. The sense of collision at the time can be eliminated and a good feeling of use can be obtained.

[Brief description of the drawings]

FIG. 1 is an overall longitudinal sectional view of an applicator according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is an enlarged vertical cross-sectional view of a distal end portion of a valve housing (valve chamber) of the applicator.

FIG. 4 is a sectional view taken along line BB of FIG. 3;

FIG. 5 is a simplified vertical sectional view showing the entire configuration of a valve of the applicator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Free ink type writing implement (coating implement) 2 Outer cylinder (outer body) 3 Ink tank (tank) 4 Tip plug (holding member) 5 Chip 6 Valve 11 Valve housing (Valve chamber) 12 Valve body 13 Spring (biasing member) 14 opening

Claims (4)

[Claims] 1. A tank having a coating liquid contained therein, and a valve provided at a tip end of the tank, wherein the valve has a valve body movably movable back and forth in a valve chamber having an opening at the tip end. And the valve body closes the opening by the urging force of the urging member, and a tip is provided on the tip side of the valve,
An applicator wherein a rear end of the tip is in contact with a front end of the valve body, and a spring constant of the urging member is 0.1 kgf / mm or more. 2. A tank having a built-in coating liquid and a valve provided at the tip of the tank, wherein the valve has a valve body arranged to be movable back and forth in a valve chamber having an opening at the tip. And the valve body closes the opening by the urging force of the urging member, and a tip is provided on the tip side of the valve,
An applicator, wherein a rear end of the tip is in contact with a front end of the valve body, and a spring constant of the urging member is 0.5 kgf / mm or more. 3. The urging force of the urging member when the valve element closes the opening of the valve chamber is smaller than a predetermined force and is large enough to substantially close the opening of the valve chamber. 3. The applicator according to claim 1, wherein the valve body is configured to be retractable until the urging force of the urging member balances the predetermined force. 4. 4. A tank including a coating liquid, and a valve provided at a tip of the tank, wherein the valve has a valve body disposed in a valve chamber having an opening at the tip. The valve element closes the opening by the urging force of the urging member, and a tip is provided on the distal end side of the valve, and the rear end of the tip abuts on the distal end of the valve element protruding distally from the opening. The application pressure acts on the chip by applying the pressure acting on the chip during application to retract the chip against the urging force of the urging member so that the valve body separates from the opening of the valve chamber. The urging force of the urging member against the valve when the urging member is deformed is at least 1.5 times the urging force of the urging member when the valve is pressed against the opening of the valve chamber. An application tool characterized in that the urging member is configured such that