JP2001080278A - Applicator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an application liquid from dropping down due to an excessive pushing-in of a tip from occurring by a simple structure, by arranging a valve device which operates in such a manner that when the tip is slightly retracted, the valve opens and the application liquid is fed to the tip, and on the contrary, when the tip is greatly retracted, the valve is closed, between an application liquid housing section and the tip. SOLUTION: When this applicator 1 is used, by slightly pushing in a tip 2 comprising a fiber bundle, the bottom section 4b of a slit valve 4 slightly deforms accompanying the pushing-in. Then, a notch 8, which is formed on the bottom section 4b, opens, and an ink in an ink-housing section 10 flows into the tip 2 side through distribution holes 9 of a partition wall 5 and the opening. In this case, if the tip 2 is pushed in too much, the bottom section 4b of the slit valve 4 greatly deforms, and is pressed to the partition wall 5, and the distribution holes 9 are closed. Therefore, even if the tip 2 is greatly retracted, and the slit valve 4 is greatly opened, the distribution holes 9 behind the slit valve 4 are closed, and the feeding of the ink is shut off. Therefore, the ink can be prevented from dropping down.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an applicator such as a writing instrument and a cosmetic tool.

[0002]

2. Description of the Related Art For example, Japanese Patent Laid-Open Publication No. Hei 7-266782 discloses a writing implement having a structure in which a slit valve is opened by pushing a pen tip to supply ink in an ink tank to the tip.

[0003] The slit valve (elastic body 8) used in this conventional writing instrument is a bottomed cylindrical shape having a notch at the bottom. Is in close contact. Therefore, at normal times (when not in use), the pressure of the ink acts on the bottom of the slit valve to open the notch, but the opening of the notch of the slit valve is prevented by the rear surface of the pen tip. . On the other hand, when the chip is retracted and the notch of the slit valve is opened, the ink in the tank flows out to the chip side, is impregnated in the chip, and can be written.

[0004]

However, in the above-mentioned conventional writing instrument, the notch of the slit valve is largely opened as the tip is pushed further, so that the valve is kept open.
A large amount of ink flows out to the chip side, causing ink drips.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to prevent the application liquid such as ink from being supplied when the chip is pushed too much, and to eliminate the dripping of the coating liquid, while having a simple structure. I do.

[0006]

Means for Solving the Problems In order to achieve the above object, the present invention takes the following technical means.

That is, in the applicator of the present invention, a chip is disposed so as to be movable back and forth in front of a coating liquid storage section for storing a coating liquid, and the chip is normally placed between the coating liquid storage section and the chip. Is provided with a valve device that opens when the chip is retracted to a small extent, supplies the coating liquid in the application liquid storage section to the chip, and closes when the chip is largely retracted. Note that the chip can be made of a material such as a fiber bundle or a porous body, from which the coating liquid can ooze out by capillary action or the like.

According to the applicator of the present invention, at normal times,
That is, when not in use, the valve device provided between the coating liquid storage section and the chip is closed, so that there is no supply of the coating liquid. Also, when the tip is retracted slightly, the valve device opens,
The coating liquid in the coating liquid container flows out to the chip side. When the tip is further pushed in, that is, when the tip is largely retracted, the valve device closes and the supply of the coating liquid is stopped. Therefore, the valve device can be configured to close when the chip is pushed too much, and the dripping of the application liquid can be eliminated.
It is preferable to provide an appropriate urging means for urging the tip to return to the front. The biasing means can be constituted by a component of the valve device. For example,
The valve device is provided with a slit valve formed by forming a cut in the elastic member. If the rear end of the chip is in contact with the front surface of the slit valve, the chip is moved forward by the elastic restoring force of the slit valve. Can be restored.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS As a preferred embodiment of the present invention, there are provided a coating liquid storage section for storing a coating liquid, a slit valve provided at a front end of the coating liquid storage section, and a slit valve provided in front of the slit valve. The slit valve is pushed by the retreated chip and elastically deformed to form an opening through which the coating liquid flows out of the coating liquid storage section to the chip side. In the application tool, which is closed when the chip returns to the front side, the opening is formed with a flow hole behind the slit valve, through which the coating liquid in the coating liquid storage section flows to the rear of the slit valve, When the amount of elastic deformation of the slit valve is small, the through hole is opened, and when the amount of elastic deformation of the slit valve is large, the through hole is closed by the slit valve. It may include those characterized by and. In addition, the valve device of the present invention is constituted by the slit valve and the flow hole.

[0010] The coating liquid can be used for any purpose such as ink, mascara, nail polish and the like.
Any oily liquid may be used.

The coating liquid storage section can be formed by a cylindrical tank, or can be formed by a part of the coating tool main body. When the viscosity of the coating liquid is low, it is preferable to use a bottomed cylindrical tank whose rear end is closed and provide a slit valve at the front end of this tank.
When a cylindrical tank having an open rear end is used, a backflow preventing agent or a slide stopper can be incorporated in the tank at the rear end of the coating solution. And slides forward in the cylindrical tank with the exhaustion of.

As the slit valve, a plate-shaped or film-shaped elastic member having a cut formed in the front-rear direction can be used. More preferably, a bottomed cylindrical elastic member with a cut formed in the bottom can be used. That is, the slit valve is formed by making a cut in the bottom of the bottomed cylindrical elastic member, and an opening communicating with the front and rear of the slit valve is formed by opening the cut, and when the slit valve is greatly elastically deformed. The flow hole may be closed by a rear surface of the bottom of the elastic member.

The flow hole can be formed in a partition wall provided at the front end of the coating liquid storage section. A main coating liquid storage space is formed behind the partition wall, and a minute space is formed between the partition wall and the slit valve. A space can be formed. The number of flow holes may be one, but two or more flow holes may be formed. The size and shape of the flow hole are not particularly limited, but preferably, the flow hole can be formed in a relatively small circular shape with respect to the size of the slit valve.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. The following description of the embodiments is for describing the applicator shown in the drawings in detail, but the present invention is not limited to this and may be appropriately designed without departing from the gist of the present invention. It can be changed.

FIG. 1 shows an applicator 1 according to a first embodiment of the present invention.
1 illustrates a writing implement having a fiber bundle chip 2 at a pen tip. The applicator 1 includes a substantially cylindrical main body 3 (outer cylinder) and a nib tip 2 attached to a front end of the main body 3.
, A slit valve 4, a partition wall 5, and a tail plug 6.

The main body 3 has a long cylindrical shape and can be formed of a suitable material such as a resin such as polypropylene or a metal such as aluminum or stainless steel. Also, the main body 3
The front end is tapered, and the front end is a tip holding cylinder 3a. This tip holding cylinder 3
The chip 2 is slidably fitted in the front and rear direction. In the main body 3, an outside air introduction hole is formed at an appropriate portion. In the illustrated embodiment, a vertical groove 7 extending forward and backward is formed on the inner surface of the chip holding cylinder portion 3b to form an outside air introduction hole opening on the tip end side. An outside air introduction hole can be formed in the portion. Note that a cap (not shown) is provided at the tip of the outer cylinder 2.
Can be detachably mounted.

A mounting portion 3b for the slit valve 4 is formed on an inner surface of the main body 3 at an intermediate portion in the axial direction. In the example shown,
The mounting portion 3b is formed by an annular groove, into which the slit valve 4 is fitted. The slit valve 4 is formed by forming a notch 8 penetrating back and forth in a bottom portion 4b of a bottomed cylindrical elastic member, and the cylindrical portion 4a of the slit valve 4 is attached to the mounting portion 3b. The space before and after the bottom 4b of the slit valve 4 is closed. When the bottom 4b of the slit valve 4 is elastically deformed, the notch 8 is opened to form an opening communicating the space before and after the slit valve 4. As the elastic member constituting the slit valve 4, silicon rubber is suitable, but other various rubbers can be used. In addition, the cut 8 may have an appropriate shape such as a linear shape, a rectangular shape, and a cross shape.

A partition wall 5 is provided behind the slit valve 4 so as to form a slight gap with the slit valve 4. The partition wall 5 may be formed integrally with the main body 3, but is formed by fitting a disk-shaped member separate from the main body 3 into the main body 3 in the illustrated example.
The partition wall 5 is provided with a plurality of ink circulation holes 9 penetrating back and forth. The arrangement of the plurality of flow holes 9 can be designed as appropriate. For example, they can be arranged in a circle around the axis, and can be arranged at positions displaced in a direction perpendicular to the cutting direction of the slit valve 4. It is preferable to provide them.

Then, in the applicator 1 of the illustrated example, the partition 5
The inside space of the main body 3 behind is formed as an ink storage unit 10. That is, the slit valve 4 and the partition wall 5 are disposed at the front end of the ink storage unit 10 with a slight gap in front and rear. In addition, the ink storage unit 10 may be configured by a tank separate from the main body 3, and in this case, the partition wall 5 and the slit valve 4 may be provided at the front end of the tank. Regardless of the configuration employed, the slit valve 4 and the partition wall 5 close the valve when not in use, and open when the tip 2 is retracted slightly to open the ink container 10.
A valve device is configured to supply the ink inside to the chip 2 and close the valve when the chip 2 is largely retracted. An appropriate coating liquid such as a water-based ink or an oil-based ink is stored in the ink storage unit 10.

The chip 2 is made of a known resin or fiber as a material, and oozes ink by capillary action or the like. The chips 2 may all be formed of a single material, or may be formed by joining a resin chip and a relay member of a fiber bundle. Also, a so-called brush pen type tip may be used.

The tip of the tip 2 projects forward from the tip of the main body 3 so that characters and the like can be written, and the rear end of the tip 2 contacts the front surface of the bottom of the slit valve 4 described above. It is in contact with or close to the front surface of the bottom 4b of the slit valve 4. The tip 2 includes a large-diameter shaft portion 2a on the front end side and a small-diameter shaft portion 2b on the rear end side.
The outer diameter of the rear shaft portion 2b of the tip 2 is smaller than the inner diameter of the peripheral wall portion 4a of the slit valve 4, and
The size is substantially including the range in which the plurality of flow holes 9 are formed.

A tail plug 6 is fitted to the rear end of the main body 3. The tail plug 6 has a lid 6a and a tubular portion 6b protruding forward from the lid 6a. The cylindrical portion 6b has an outer diameter that just fits into the main body 3, and is fitted into the main body 3 in a liquid-tight manner.

Next, the operation of the applicator 1 of the present embodiment will be described. When the applicator 1 is not used, the bottom 4b of the slit valve 4 is not deformed as shown in FIG. 1 and the chip 2 is located in front of the bottom.

Then, when the tip 2 is slightly pushed in at the time of writing, the bottom 4b of the slit valve 4 is deformed relatively small as shown in FIG. Then, the cut 8 formed in the bottom part 4b is opened to form an opening communicating between the slit valve 4 and the front and rear of the slit valve 4, and the ink in the ink storage part 10 is allowed to pass through the flow hole 9
Then, the ink flows into the chip 2 through the opening, and the ink is absorbed by the chip 2 and writing becomes possible.

If the chip 2 is pushed too far,
As shown in (2), the bottom 4b of the slit valve 4 is greatly deformed, the rear surface of the bottom 4b is pressed against the front surface of the partition wall 5, and the ink flow hole 9 of the partition wall 5 is closed by the bottom 4b. Therefore, even if the slit valve 4 is greatly opened by retreating the chip 2 greatly, the ink supply hole 9 behind the slit valve 4 is closed and the supply of ink is cut off, so that a large amount of ink flows into the chip 2 side. Can be avoided and fogging can be prevented.

When the pushing operation of the chip 2 is stopped, the chip 2 is returned to the front by the elastic restoring force of the slit valve 4, and the state shown in FIG. 1 is reached, the slit valve 4 is closed, and the supply of ink is stopped.

According to the above-described embodiment, the ink can be supplied to the chip by the pushing operation of the appropriate amount of the chip 2 while the simple structure by the slit valve and the number of the components are reduced, and the ink is supplied when the chip 2 is largely pushed. Can be cut off.

The present invention is not limited to the above-described embodiment, and the design can be changed as appropriate. For example, as shown in FIG. 4, the slit valve 4 has a projection 11 formed on the rear surface of the bottom 4b of the bottomed cylindrical elastic member, and the communication hole 9 is formed at a position corresponding to the projection 11. it can. According to this, the bottom 4b is deformed while the projection 11 is guided by the flow hole 9, so that the flow hole 9 can be more reliably closed by the slit valve 4. Further, the slit valve 4 is not limited to a cylindrical shape with a bottom, but is simply a plate shape,
An appropriate structure such as a block shape can be used.
Also, the slit valve 4 can be designed to open when a pressing force of about the writing pressure acts on the chip 2, or designed to open when the chip 2 is depressed intentionally. Can also.

[0029]

As described above, according to the present invention,
The valve can be opened by pressing the pen tip tip or by writing pressure to supply the coating liquid in the coating liquid storage section to the pen tip tip.If the tip is pushed too far, the valve is closed to prevent the coating liquid from flowing out. It can be stopped, the dripping of the coating liquid is eliminated, and a clean handwriting and a coated surface can be obtained.

[Brief description of the drawings]

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

FIG. 2 is an explanatory diagram of an operation of the applicator.

FIG. 3 is an operation explanatory view of the applicator.

FIG. 4 is an enlarged longitudinal sectional view of a main part of an applicator according to a second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Coating tool 2 Chip 3 Main body 4 Slit valve 8 Notch 9 Flow hole 10 Coating liquid storage part

Claims (3)

[Claims] A chip is disposed in front of a coating liquid storage section for storing a coating liquid so as to be movable back and forth, and a valve is closed between the coating liquid storage section and the chip when not in use. ,
An applicator provided with a valve device that opens when the tip is retracted to a small amount, supplies the coating liquid in the application liquid storage section to the chip, and closes when the tip is largely retracted. 2. A coating liquid storage section for storing a coating liquid, a slit valve provided at a front end of the coating liquid storage section, and a chip disposed in front of the slit valve and movable back and forth, The slit valve is configured such that an opening through which the coating liquid flows out from the coating liquid container to the chip side by being pushed and elastically deformed by the chip moved backward is formed when the chip returns to the front side. In the coating device to be closed, a flow hole for flowing the coating liquid in the coating liquid storage section to the rear of the slit valve is formed behind the slit valve,
When the amount of elastic deformation of the slit valve is small, the flow hole is opened, and when the amount of elastic deformation of the slit valve is large, the flow hole is closed by the slit valve. Utensils. 3. The slit valve is formed by making a cut in the bottom of a bottomed cylindrical elastic member, and when the cut is opened, an opening communicating between the front and rear of the slit valve is formed,
The applicator according to claim 2, wherein the flow hole is closed by a rear surface of the bottom of the elastic member when the slit valve is largely elastically deformed.