JPH07290877A - Application tool - Google Patents

Abstract

PURPOSE:To provide an application tool, using a roller, which is highly impact- resistant and suited for practical use. CONSTITUTION:An application tool 1 is equipped with a roller 7 instead of the ball of a ball-point pen, and the roller has a through hole 31, so that its interior is hollow. Since the mass of the roller 7 is very small, inertial force which generates in the roller 7, if shocked, is weak, so that the roller 7 is not thrown out.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an applicator used for writing characters or painting a color, and more particularly to an applicator for transferring ink by rotating a roller.

[0002]

2. Description of the Related Art A ball-point pen is widely used as a handy applicator. However, the ballpoint pen is not suitable for applications such as drawing a thick line or painting a wide surface because the member that transfers the ink to the application surface is literally a ball and makes point contact with the application surface.

Therefore, there has been proposed an applicator which employs a roller instead of the ball of a ballpoint pen and draws a wide line by the roller. In the prior art applicator, the ball of a well-known ballpoint pen is replaced with a roller, and the roller is housed in a holder provided at the tip of the ink reservoir. In the prior art, the roller is solid.

Further, in the technical field of ballpoint pens, the prevention of falling of the ball is achieved by caulking the tip of the ball holding portion or making the opening of the ball holding portion narrower and pressing the ball.

Further, in the technical field of ballpoint pens,
The ink reservoir side portion of the ball is in direct contact with the inner surface of the ball holding portion.

[0006]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
There are some excellent ideas. Therefore, the inventors of the present invention prototyped an applicator in which the balls of the ballpoint pen were replaced with rollers. However, this applicator is vulnerable to impact, and there is a drawback that the roller easily falls off from the roller holding portion when the impact is applied. Therefore, I tried to prevent the rollers from falling off by a method used in the technical field of ballpoint pens, such as devising the caulking method of the tip of the ball holding part or adjusting the opening of the ball holding part. However, the satisfactory result was not obtained. Researching the cause of this, the roller to be adopted in the applicator has a larger mass than the ball of a ball-point pen, so the inertial force that the roller receives when the applicator is impacted is large, and this inertial force causes the ball to hold We came to the conclusion that this is because the rigidity of the opening of the part cannot be endured.

[0007] Therefore, an object of the present invention is to provide a practical applicator by improving the drawbacks of the applicator using a roller and improving the impact resistance of the applicator.

[0008]

According to the present invention for achieving the above object, a roller accommodating portion and a holder provided with an ink circulation hole are attached to the tip of an ink reservoir, and the roller accommodating portion of the holder has a roller accommodating portion. An applicator in which a cylindrical roller is arranged, wherein the roller is a hollow body.

The invention as an embodiment of the invention described above is
The roller is a hollow body having a hole at the center, and a shaft is inserted into the hole at the center, and the shaft is supported by a holder.

In the invention as an embodiment of the above-mentioned invention, the roller is a hollow body having a hole or a recess at the center thereof, and a protrusion is provided on the inner end surface of the roller housing portion. The protrusion is characterized in that it engages with the hole or recess of the roller.

According to the invention for achieving the same object as the above-mentioned invention, a holder having a roller accommodating portion and an ink circulation hole is attached to the tip of the ink reservoir, and the roller accommodating portion of the holder has a cylindrical shape. The applicator in which the roller is provided, wherein the roller is a porous body.

In an embodiment common to any of the above-described inventions, the roller accommodating portion has an opening at the tip end side, and a bottom surface portion is provided at the ink circulation hole side. The inner surface of the portion is provided with one or more protrusions, and the total width of the tip portions of the protrusions is not more than ⅓ of the width of the roller, and the roller is supported by the protrusion. It is characterized by

According to another aspect of the invention, the roller accommodating portion has an opening on the tip side and a bottom surface portion is provided on the ink circulation hole side, and a relay core is provided in the ink circulation hole. Is provided, and the tip of the relay core contacts the roller, and the roller is pressed by the relay core toward the opening of the roller housing portion. Furthermore, in another aspect of the invention, the roller storage portion has an opening on the front end side and a bottom surface portion is provided on the ink circulation hole side, and the bottom surface portion of the roller storage portion has a cross section thereof. It is characterized in that the shape is a taper having two or more steps or an arc shape.

[0014]

In the applicator of the present invention, a holder having a roller accommodating portion and an ink circulation hole is attached to the tip of the ink reservoir, and a cylindrical roller is disposed in the roller accommodating portion of the holder. Therefore, the ink in the ink reservoir enters the roller storage portion through the ink circulation hole due to the capillary phenomenon or gravity. Then, the ink contacts the roller in the roller storage portion. Therefore, when the roller is pressed against paper or the like and the applicator is moved, the roller rolls and the ink attached to the roller is transferred onto the paper or the like.

In the applicator of the present invention, since the roller has a hollow body (claim 1) or a porous body (claim 4), the mass of the roller is light. Therefore, when the applicator of the present invention receives an impact, the inertial force generated on the roller is small. Therefore, even if the applicator of the present invention receives an impact, the roller storage section can continue to hold the roller.

In the applicator according to the second aspect, the shaft is inserted into the hollow body, and the shaft is supported by the holder, so that the roller does not fall off even if a considerably large impact is applied. Similarly, in the applicator according to claim 4,
Since the protrusion of the roller housing portion is engaged with the hole or the concave portion of the roller, the same operation as in the case where the shaft is provided is achieved.

According to a fifth aspect of the present invention, in addition to the structure of the first to fourth aspects, a protrusion is provided on the inner surface of the roller housing portion, and the roller is supported by the protrusion. Therefore, the roller is in a state of being floated from the inner surface of the roller storage portion by this protrusion. Here, since the total width of the tip portion is not more than ⅕ of the width of the roller, the contact area between the roller and the protrusion is small during writing. As a result, the applicator of the present invention has low frictional resistance when the roller rotates.

Further, in the applicator according to the sixth aspect, the tip of the relay core contacts the roller, and the roller is pressed by the relay core toward the opening of the roller accommodating portion. It is as if it were lifted. Therefore, the applicator of the present invention, like the applicator according to the fifth aspect, has a small contact area between the roller and the bottom surface at the time of writing and a small frictional resistance when the roller rotates.

The invention according to claim 7 is the above-mentioned claim 1.
In addition to the configurations of 6 to 6, the sectional shape of the bottom surface portion of the roller storage portion is tapered or arcuate in two or more steps to further improve the writing ability.

That is, in the applicator using the roller, the diameter and length of the roller are larger than those of the ball of the pole pen, so that the gap between the roller and the bottom surface side of the roller housing portion tends to be large. As a result, a large amount of ink remains in the relevant portion, but when this ink is left with the applicator upside down, it returns to the ink reservoir, and the relevant portion is replaced with air to form a cavity. Therefore, the applicator of the prior art has a problem that the ink is faint at the start of writing. On the other hand, in the writing instrument according to claim 7, since the cross-sectional shape of the bottom surface of the roller storage portion is a taper or an arc shape having two or more steps, the space between the roller and the bottom surface side of the roller storage portion is reduced. The gap is small. Therefore, the ink existing in the portion stops due to the capillary force between the roller and the roller storage portion and does not drop.

[0021]

EXAMPLES Specific examples of the present invention will be described below. FIG. 1 is a front view of a holder portion of an applicator according to a specific embodiment of the present invention. 2 is a front cross-sectional view of a holder portion of the applicator of FIG. FIG. 3 is a side sectional view of a holder portion of the applicator of FIG. 1. FIG. 4 is an enlarged view of a main part of FIG. FIG. 5 is an enlarged view of a main part of the holder shown in FIG. FIG. 6 is an enlarged view of a main part of FIG. FIG. 7 shows FIG.
It is a partial cross-section exploded perspective view of the applicator of FIG.

1 to 7, reference numeral 1 denotes an applicator in a specific embodiment of the present invention. Applicator 1 of this embodiment
The basic configuration of is similar to that of a well-known ballpoint pen, a holder 3 is attached to the tip of the ink reservoir 2, and
The pen shaft 5 is attached to the outside of the. And, as a constitution peculiar to this embodiment, a hollow roller 7 is rotatably housed in the holder 3.

Explaining the structure of each member, the ink reservoir 2 and the pen shaft 5 are exactly the same as those of the ballpoint pen, and are cylinders made of synthetic resin.

The holder 3 is a member for holding the roller 7, and is made by injection molding of polyacetal, polypropylene or the like or cutting of metal. The external shape of the holder 3 is roughly divided into three parts: an ink mounting part 8, a pen shaft insertion part 9 and an exposed part 10. The ink mounting portion 8 has a circular cross section, and its outer shape is substantially equal to the inner diameter of the ink reservoir 2 described above. Also, the ink mounting part 8
An ink introducing hole 11 is opened on the bottom surface of the.

The pen shaft insertion portion 9 also has a circular cross section,
It is made slightly thicker than the ink mounting portion 8. The outer diameter of the pen shaft insertion portion 9 is substantially equal to the inner diameter of the pen shaft 5. Further, the pen shaft insertion portion 9 is provided with two grooves 12 in the axial direction. The groove 12 functions to equalize the atmospheric pressure inside and outside the pen shaft 5 and to make the ink flow out from the ink mounting portion 8 to the holder 3 smooth.

The exposed portion 10 has a circular cross-sectional shape at the boundary with the pen shaft insertion portion 9, and becomes thinner toward the front. The tip portion has a ridge line shape. That is, the tip of the exposed portion 10 extends in the direction perpendicular to the central axis, and the width of the top surface is narrow. Then, at the tip of the exposed portion 10,
A rectangular tip opening 15 is provided. The width of the tip opening 15 is slightly smaller than the diameter of the roller 7.

Next, when the eyes are moved to the inside of the holder 3, the above-mentioned ink inlet 11 and the tip opening 15 are communicated with each other through the ink circulation hole 17 and the roller accommodating portion 18 as shown in FIGS. ing. Here, the ink flow hole 17 has a gently changing cross-sectional shape, and the ink introducing hole 11 has a circular cross section.
Therefore, the device is devised so that the ink can be smoothly sent to the roller storage portion 18 having a rectangular cross section. That is, the ink circulation hole 17 is composed of three parts, from the ink introduction hole 11 side, a columnar portion 19, a narrowed portion 20, and a slit 21. Sequentially speaking, among the ink circulation holes 17, the ink introduction hole 11
From the to the vicinity of the exposed portion 10, the cross-sectional shape when viewed from a plane is circular, and the portion is a columnar portion 19. Then, from the vicinity of the boundary between the exposed portion 10 and the pen shaft insertion portion 9, the tip side is in a state in which two surfaces are cut (the inside of the holder 3 is built up), and a cross section viewed from the plane of the hole. The shape is gradually narrowed down.

A slit 21 is provided from the top surface of the narrowed portion 20. The tip of the slit 21 is open to the roller storage portion 18. In addition, in the present embodiment, the opening shape of the slit 21 to the roller storage portion 18 is a rectangle, but it may be another shape such as an ellipse.

The roller housing 18 is a chamber in which the roller 7 is rotatably arranged. The inner length of the roller storage portion 18 is 1/100 mm of the total length of the roller 7 described later.
The end surface 13 of the roller 7 can be held in a non-compressed state because it is designed to be relatively large. The slit 21 described above is opened in the bottom surface portion 23 of the roller storage portion 18, and the direction of the center line of the slit 21 and the axial center line of the roller storage portion 18 are the same. Further, the bottom surface portion 23 of the roller storage portion 18 is formed with a taper that spreads from the slit 21 toward the roller storage portion 18.

The taper provided on the bottom surface portion 23 of the present embodiment is a two-step taper as shown in FIG. 5, which is an obtuse taper 28 continuous with the slit and an acute taper 2 following it.
It is composed of 9. The reason for providing the two-stage taper is to reduce the gap between the roller 7 and the inner wall of the roller storage portion 18 to prevent the ink from being replaced with air.

That is, the diameter of the roller 7 is larger than that of the ball of the ballpoint pen. Therefore, if the bottom surface portion 23 is simply tapered, a gap is inevitably formed between the roller 7 and the inner wall of the roller housing portion 18. Laura 7
And, it is desirable that the inner wall of the roller storage portion 18 has a certain amount of clearance in order to smooth the rotation of the roller 7. However, if this is excessively large, when the applicator is placed upside down, The ink drops in the direction of the ink reservoir 2. Therefore, in this embodiment, the bottom surface portion 23 is provided with a double taper to reduce the gap between the roller 7 and the roller storage portion 18 to prevent ink from falling. The same effects as those of the present embodiment can also be achieved by tapering the portion in three stages or more or by forming an arc shape.

The bottom portion 23 of the roller storage portion 18 has a protrusion 25.
Are formed in five rows. Protrusion 25 adopted in this embodiment
4 extend over the entire area of the bottom surface portion 23 of the roller housing portion 18 in the short side direction with the slit 21 interposed therebetween as shown in FIGS. That is, the direction of the ridgeline of the protrusion 25 extends in the direction perpendicular to the opening of the slit 21. Therefore, the direction of the ridgeline of the protrusion 25 is positioned perpendicular to the axis of the roller 7 when the roller 7 is attached to the roller housing portion 18.

Further, since the protrusion 25 is provided on the bottom surface portion 23 of the roller accommodating portion 18 and its height is substantially constant except for the end portion, the ridgeline of the protrusion 25 also spreads toward the roller accommodating portion 18. A step taper is formed.

Explaining the sectional shape of the protrusion 25 with reference to FIG. 4, the width A of the protrusion 25 is from 0.05 mm to 0.5 mm.
About mm is preferable. The height B of the protrusion 25 is preferably such that the surface of the roller 7 does not come into contact with the bottom surface portion 23 of the roller housing portion 18 when the roller 7 is pressed by the writing pressure. Is 0.02 mm to 0.1
About mm is preferable.

Further, it is desirable that the number of the projections 25 is two or more in order to stably support the roller 7. However, if the number of the protrusions 25 is excessively increased, the contact area between the top surface of the protrusions 25 and the surface of the roller 7 increases, so the number of the protrusions 25 is the total width A of the tip portion. It is necessary to consider so that the width is not more than ⅓ of the width of the roller 7. If the total width A of the tip portion exceeds three-fifths of the width of the roller 7, the contact area between the surface of the roller 7 and the protrusion 25 becomes large, and the frictional resistance of the roller increases. The state is not so different from the case where 7 is directly brought into contact with the bottom surface portion 23 of the roller storage portion 18.

On the other hand, if the total width A of the tip portions of the projections 25 is too small, the roller 7 wobbles due to the writing pressure, which rather hinders the rotation of the roller 7.
Considering these circumstances, it is most desirable to design the number of the protrusions 25 so that the total width A of the tip portion is about one half of the width of the roller 7.

The roller 7 is the most characteristic part in this embodiment. The roller 7 used in the applicator 1 of the present embodiment is made of nickel silver (copper, nickel, zinc alloy), a copper alloy such as brass, stainless steel, or a resin that is not deteriorated by ink. A through hole 31 is provided in the center of the roller 7 and is hollow. The through hole 31 at the center of the roller 7 is often made by cutting. The ratio of the inner diameter to the outer diameter of the roller 7 is, for example, about 0.5: 1 to 0.8: 1. The selection of this ratio is mainly determined by the rigidity of the roller 7. That is, it is desirable that the through hole 31 of the roller 7 be as large as the rigidity thereof allows, and as the through hole 31 becomes larger, the mass of the roller naturally decreases. Therefore, the through hole 31 of the roller 7
The larger is set, the smaller the inertial force generated on the roller when it receives an impact, and the more difficult it is for the roller to fall off. For reference, the following table shows the ratio of the inner diameter to the outer diameter of the roller and the mass of the roller.

[0038]

[Table 1]

The roller 7 is the roller storage portion 1 of the holder 3.
It is arranged in 8. And a part of the roller 7 has a tip opening 1
It is exposed from 5. The end portion 26 (see FIG. 6) of the tip end opening 15 of the roller 7 contacts the surface of the roller 7 as shown in FIG.
Further, in the roller storage portion 18 of the applicator 1, the tip of the protrusion 25 provided on the bottom surface portion 23 of the roller storage portion 18 is in contact with the surface of the roller 7. In this embodiment, the ridgeline of the protrusion 25 forms a gentle two-step taper as shown in FIG. 5, so that not all of the top surface of the protrusion 25 abuts the surface of the roller 7, but a part (2 Only) are in contact. The roller 7 is supported by the protrusion 25 and is in a state of being lifted from the bottom surface portion 23 of the roller housing portion 18.

The procedure for assembling the applicator 1 according to this embodiment is not particularly limited, but the roller 7 is press-fitted from the tip end opening 15 of the holder 3 so that the roller accommodating portion 18 is provided.
It is appropriate to house it inside.

Next, the basic operation of the applicator 1 of this embodiment will be described. In the applicator 1 of this embodiment, the ink reservoir 2
Ink flows into the holder 3 from the roller storage unit 18
Is filled with ink. The applicator 1 of this embodiment draws a thick line by the same operation as a known ballpoint pen. For example, when drawing a line on paper using the applicator 1, the pen shaft 5 of the applicator 1 is held by hand, and the exposed portion of the roller 7 is pressed against the paper surface to move the applicator 1. Then, the roller 7 rolls and the ink in the roller storage portion 18 is transferred to the paper.

Here, in the applicator 1 of this embodiment, the roller 7
Is supported by a protrusion 25 provided on the roller storage portion 18, and is in a state of floating from the bottom surface portion 23 of the roller storage portion 18. Therefore, the frictional resistance when the roller 7 rotates is small. Therefore, in the applicator 1 of this embodiment, the rotation of the roller 7 is smooth. Therefore, the line drawn by the applicator 1 of this embodiment has a constant line thickness and density, and is not blurred.

The characteristic action of the applicator 1 of this embodiment is exhibited when a strong impact is applied to the applicator, such as dropping the applicator 1. That is, when the applicator 1 of this embodiment is dropped,
An inertial force is generated in the roller 7, and this inertial force acts in the direction in which the roller 7 falls off the holder 3. However, in the applicator 1 of the present embodiment, since the roller 7 is hollow, the mass is small, and therefore the inertial force generated by the roller 7 is small. Therefore, even if a large impact is received, the roller 7 will not fall off.

In order to confirm the effect of the applicator of the present invention,
An applicator 1 having a length of 4 mm, an outer diameter of 2 mm and an inner diameter of 75% of the outer diameter of a stainless steel roller was prototyped. Further, as a comparative example, an applicator provided with a solid roller made of stainless steel having the same length and outer shape as that of the example was manufactured as a prototype. And both dropped from a height of 1 m. As a result, in the applicator of the comparative example, the roller fell off, whereas in the applicator 1 of the present example, the roller 7 was still firmly held.

In the above embodiment, the holder 3 of the roller 7 is used.
The roller holding portion 18 has its tip opening 15 narrower than the roller 7, and the peripheral surface of the roller 7 abuts against the back surface of the tip opening 15. When the roller 7 provided with the through hole 31 is used, the through hole 31 is used to remove the roller 7 instead of or in addition to the above-described measure for narrowing the tip opening 15. It is also possible to prevent it. Hereinafter, with reference to FIGS. 8 and 9, a configuration for preventing the roller 7 from falling off by using the through hole 31 will be described. In the following embodiments, the same members as those in the previous embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

FIG. 8 is an enlarged cross-sectional view of an essential part of an applicator according to a modified embodiment of the present invention. FIG. 9 is an enlarged cross-sectional view of a main part of an applicator according to another modification of the present invention. In the applicator 40 shown in FIG. 8, inside the roller storage portion 41, the roller 7
A round protrusion 43 is provided at a position where the end surface of the contact portion abuts. When the roller 7 is press-fitted, the protrusion 43 is deformed,
When the roller 3 is arranged at the regular position, the protrusion 43 is inserted into the through hole 31 of the roller 3.

In the applicator 40 of this embodiment, the roller 7 will not fall off even if a considerable impact is applied, because the through hole 31 of the roller 7 is engaged with the projection 43. In the case where the protrusion 43 is engaged with the roller 7 as in this embodiment, the roller 7 does not necessarily need to be provided with a through hole, and is, for example, generally hollow and has a partition in the middle portion. It may be a roller. Further, the end face of the roller may be provided with a recess of a considerable size and be in a hollow state.

The applicator 50 shown in FIG. 9 uses the shaft 51 instead of the protrusion 41 to prevent the roller 7 from falling off. That is, in the holder 53 used in this embodiment, the roller housing portion 52 is provided with the through hole 54. The roller 7 is arranged in the roller storage portion 52, and the shaft 51 is stretched between the through hole 54 of the roller 7 and the roller storage portion 52. In the present embodiment, the purpose of disposing the shaft 51 is merely to prevent the roller 7 from falling off, and does not intend to act as the rotation shaft of the roller 7. Therefore, the diameter of the shaft 51 is obviously smaller than the diameter of the through hole 31 of the roller.

In the above embodiments, the roller 7 is disclosed as a cylindrical one, but a roller 60 having a porous body as shown in FIG. 10, for example, can be adopted as a roller having the same function. . Since the porous roller 60 has a smaller mass than that of the solid roller 60, the inertial force due to the impact is small as in the previous embodiment, and the roller 60 does not easily fall off even when the impact is applied. The pores of the porous roller 60 may be open cells or closed cells. The surface of the roller 60 may be smooth or uneven. When the surface of the roller 60 is smooth, there is an advantage that the sliding surface of the roller storage portion and the roller are smooth during writing, and the rotation of the roller is smooth.

On the other hand, when the surface of the roller 60 is uneven, there is an effect that the ink can flow well.

In the above embodiment, in order to make the rotation of the rollers 7, 60 smooth, the projections 25 are provided on the bottom surfaces of the roller accommodating portions 18, 41, 52, and the rollers 7, 60 have the projections 25. However, instead of this, it is also recommended to use a relay core to support the roller. FIG. 11 is a side sectional view of a holder portion of an applicator according to a modified embodiment of the present invention, which illustrates a configuration using a relay core. In the applicator 70 of FIG. 11, the relay core 61 is arranged in the ink circulation hole. The tip of the relay core 61 is brought into contact with the roller 7, and the roller 7 is held by the relay core 61 in the roller housing portion 18.
Is pressed towards the opening. Therefore roller 7
Is slightly lifted from the bottom surface portion 23. When a line or the like is drawn by the applicator 70, the roller 7 is pressed and comes into contact with the bottom surface portion 23. However, in this embodiment, the roller 7 is pressed in the opening direction by the relay core 61, so the roller 7 is pressed. The contact force between 7 and the seat surface 23 is small. Therefore, writing is smooth.

[0052]

In the applicator of the present invention, since the hollow body (Claim 1) or the porous body (Claim 4) is used for the roller, the weight of the roller is light and when the roller is impacted, The inertial force generated in the roller is small. Therefore, even if the applicator of the present invention receives an impact, the roller storage section can continue to hold the roller. Therefore, the applicator of the present invention has a strong impact resistance.

Further, in the applicator according to the second and third aspects, the shaft and the projection are engaged with the roller, so that there is an effect that the dropping of the roller is more completely prevented.

According to the fifth aspect of the invention, in addition to the above-mentioned effects, there is an effect that the frictional resistance when the roller rotates is small, and there is an effect that the writing is smooth.

In the applicator according to the sixth aspect of the invention, since the roller is in a state of being lifted up by the relay core, the contact area between the roller and the bottom surface is small at the time of writing, and the friction when the roller rotates. Since the resistance is small, there is an effect that the writing is smooth.

According to the seventh aspect of the present invention, the ink between the roller and the roller accommodating portion is prevented from dropping toward the ink reservoir when not in use. Therefore, the problem of ink fading at the start of writing is prevented. Also has the effect of being.

[0057]

[Brief description of drawings]

FIG. 1 is a front view of a holder portion of an applicator according to a specific embodiment of the present invention.

FIG. 2 is a front sectional view of a holder portion of the applicator of FIG.

FIG. 3 is a side sectional view of a holder portion of the applicator of FIG.

FIG. 4 is an enlarged view of a main part of FIG.

5 is an enlarged view of a main part of the holder shown in FIG.

FIG. 6 is an enlarged view of a main part of FIG.

7 is an exploded perspective view, partly in section, of the applicator of FIG.

FIG. 8 is an enlarged cross-sectional view of a main part of an applicator according to a modified example of the present invention.

FIG. 9 is an enlarged cross-sectional view of a main part of an applicator according to another modification of the present invention.

FIG. 10 is a perspective view of a roller used in an applicator of a modified example of the present invention.

FIG. 11 is a side sectional view of a holder portion of an applicator according to a modified example of the present invention.

[Explanation of symbols]

 1 Applicator 2 Ink reservoir 3 Holder 5 Pen shaft 7 Roller 15 Tip opening 18 Roller storage part 23 Bottom part 25 Protrusion 31 Through hole 40 Applicator 41 Roller storage part 43 Protrusion 50 Applicator 51 Shaft 60 Roller 61 Relay core 70 Applicator

Claims (7)

[Claims] 1. An applicator in which a roller accommodating portion and a holder provided with an ink circulation hole are attached to the tip of an ink reservoir, and a cylindrical roller is disposed in the roller accommodating portion of the holder. An applicator characterized by being a hollow body. 2. The coating according to claim 1, wherein the roller is a hollow body having a hole at the center, and a shaft is inserted into the hole at the center, and the shaft is supported by a holder. Ingredient 3. The roller is a hollow body having a hole or a recess at the center, and the end face inside the roller housing portion is
The applicator according to claim 1, wherein a projection is provided, and the projection engages with a hole or a recess of the roller. 4. An applicator in which a roller accommodating portion and a holder provided with an ink circulation hole are attached to the tip of the ink reservoir, and a cylindrical roller is disposed in the roller accommodating portion of the holder. An applicator characterized by being a porous body. 5. The roller accommodating portion has an opening on the tip side, and a bottom surface portion is provided on the ink circulation hole side, and one or more protrusions are provided on the inner surface of the bottom surface portion of the roller accommodating portion. The total width of the tip portions of the protrusions is not more than ⅓ of the width of the roller, and the roller is supported by the protrusions. The applicator described in Crab. 6. The roller accommodating portion has an opening on the front end side, a bottom surface portion is provided on the ink circulation hole side, and a relay core is arranged in the ink circulation hole. The applicator according to any one of claims 1 to 5, wherein a tip of the roller is in contact with the roller, and the roller is pressed toward the opening of the roller housing by a relay core. 7. The roller accommodating portion has an opening on the tip side and a bottom surface portion is provided on the ink circulation hole side, and the bottom surface portion of the roller accommodating portion has a cross-sectional shape of two or more steps. The applicator according to any one of claims 1 to 6, wherein the applicator is tapered or arcuate.