JPH11268468A - Coating tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a coating tool wherein there is no thin spot or no drooling of ink by a method wherein the shape of a slide plug is modified to prevent the slide plug from moving rearward. SOLUTION: The coating tool 1 consists of a main body (ink cylinder) 2, a tail plug 3, a forward plug 5, a bellows-shaped valve 6, and a slide plug 7. The plug 7 has a cylindrical body and the forward end of the plug 7 has a convex shape forming a loose arcuate surface. The forward end of the plug 7 functions as a pressure receiving part 21, and the interior thereof forms a cavity. A seal part 22 is provided on the forward side periphery of the plug 7. An anchoring member 23 is formed on the periphery at the rear end of the plug 7. When the internal pressure of an ink tank 11 rises, the convex shape of the part 21 becomes flat or concave and hence the part 21 expands outwardly so that the diameter of the seal part 22 connecting with the part 21 becomes larger.

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 fountain pen, a ballpoint pen, and a line marker. More specifically, the present invention relates to an applicator having a built-in ink having fluidity and a slide stopper. It is about tools.

[0002]

2. Description of the Related Art For applicators such as line markers, water-based inks having good coloring and oil-based inks using alcohol as a solvent are often used. In addition, in conventional line markers, etc., the ink was built into the applicator in a state of being impregnated with the batting arranged in the ink tank, but in recent years it has fluidity to store a larger amount of ink. In many cases, a configuration called a free ink type in which the ink is directly incorporated in the state as it is is adopted.

[0003] The free ink type applicator is roughly classified into a type in which consumed ink is replaced with air, and a type in which the volume itself of an ink tank is reduced with consumption of ink. Of these, the latter, which reduces the volume of the ink tank itself, is superior to the former in that it has less ink dripping, fewer parts, and more ink storage. ing. A typical example of a type of applicator in which the volume of the ink tank itself is reduced is an applicator with a slide stopper (Japanese Patent Application Laid-Open No. 64-5897).
No. 3-106038, etc.).

FIG. 7 is a sectional view of a conventional applicator with a slide stopper. FIG. 8 is a perspective view of a slide stopper used in a conventional applicator. The applicator 100 shown in FIG. 7 is disclosed in Japanese Utility Model Laid-Open No. 3-106038. The applicator 100 includes a main body 101, a tail plug 102, a pen tip 103, and a slide plug 105 as shown in the figure. The main body 101 also functions as an ink cylinder, and is filled with ink 106 inside.
Inside the main body (ink cylinder) 101, a slide stopper 105 is arranged.

The slide stopper 105 is in contact with the rear end of the ink 106 and is in contact with the inner periphery of the main body (ink cylinder) 101 in a liquid-tight manner. The slide stopper 105 can move in the axial direction inside the main body 101 while maintaining the liquid tightness. In the applicator 100 with a slide stopper, the space of the main body (ink cylinder) 101 closed by the slide stopper 105 functions as an ink tank 109.

When the pen tip 103 is pressed against paper or the like in order to use the applicator 100, the ink 106 is applied from the pen tip 103 to the paper surface. Then, with the outflow of the ink 106 from the main body (ink cylinder) 101, the slide stopper 105 moves to the pen tip tip 103 side.

Here, the slide stopper 105 according to the prior art is used.
Is solid as shown in FIG. 8, and the main body has a columnar shape. Then, a sealing portion 10 is provided on the peripheral surfaces of both ends of the main body portion.
7, 108 are provided. In the prior art, the ink contact surface 110 of the slide stopper 105 is flat.

[0008]

An important point in actually manufacturing the applicator 100 with a slide stopper is that the slide stopper 105 is always moved while being in contact with the rear end of the ink 106. Stopper 105 and ink 10
The formation of a gap between the rear ends of the 6 must be strictly avoided. Also, the ink tank 109 always contains ink 1
06, it is not allowed to mix gas into the ink tank 109.

That is, the applicator 100 with a slide stopper is
The ink 106 is caused to flow out due to a pressure difference between the inside of the ink tank 109 and the front end portion or a capillary phenomenon. Then, the slide stopper 1 is caused by a pressure difference between the ink tank 109 and the outside.
05 is advanced. In other words, although ink consumption by writing is little by little, since the ink 106 in the ink tank 109 is an incompressible fluid, a considerable pressure difference occurs inside and outside the ink tank 109, and the slide stopper 1
05 prevents the inside of the ink tank 109 from becoming negative pressure. However, if a gap is formed between the slide stopper 105 and the rear end of the ink 106 due to gas being mixed into the ink tank 109 or the like, the pressure difference between the inside and outside of the ink tank 109 is offset by the compressibility of the gas, and the slide stopper 105 does not move forward. Then, as a result of the slide stopper 105 not moving forward, the inside of the ink tank 109 tends to have a negative pressure, and the outflow of the ink 106 from the ink tank 109 stops. That is, when gas is mixed into the ink tank 109, the ink 106 is blurred. When gas is mixed into the ink tank 109, the gas expands due to a rise in outside air temperature or the like, and the ink tank 10
9, the ink 106 is pushed out, and the ink 106
Drops.

[0010] There are various causes for gas to enter the ink tank 109. Frequently occurring factors include an increase in ambient temperature and an impact due to a drop. For example, if the ink in the ink tank expands due to a rise in the ambient temperature and the slide stopper recedes, the slide stopper cannot follow the contraction of the ink volume due to the temperature drop,
A gap is formed between the slide stopper and the rear end of the ink, thereby allowing air to enter. Also, if the applicator drops by mistake, the impact of the drop will cause the slide stopper to retreat, and air will be mixed in.

The present invention focuses on the above-mentioned problems of the prior art, and aims to improve the shape of the slide stopper, prevent the slide stopper from retreating, and develop an applicator that is free from ink fraying and dropping. It is assumed that.

[0012]

According to the first aspect of the present invention, there is provided an ink cylinder having a built-in ink in which fluidity is maintained. Is connected to the application unit, provided with a slide stopper that moves in accordance with the consumption of the ink inside the ink cylinder, wherein the slide stopper is a seal portion that is in close contact with the inner surface of the ink cylinder, the ink, An application tool having a pressure receiving portion in contact with a rear end portion, wherein when the pressure in the ink cylinder increases, the pressure receiving portion is deformed and the diameter of the seal portion is increased.

In the applicator of the present invention, when the pressure in the ink cylinder rises, the pressure receiving portion is deformed, the diameter of the seal portion is increased, and the sliding resistance between the slide stopper and the ink cylinder increases. Therefore, when the pressure inside the ink cylinder rises due to the temperature rise or a local pressure rise occurs at the rear end of the ink due to the impact of the drop, the sliding resistance between the slide stopper and the ink cylinder temporarily increases. , Prevent the slide stopper from retreating.

According to a second aspect of the present invention, there is provided an applicator having an ink cylinder in which ink having a fluidity is stored, an application portion is connected to a tip of the ink cylinder, and an inside of the ink cylinder is provided. In an applicator provided with a slide stopper that moves following the consumption of ink, the slide stopper has a protruding shape toward the application part side, the outside being in contact with the ink, and the inside being a hollow pressure receiving part. An application tool characterized by having a seal portion that is continuous with the portion and that is in close contact with the inner surface of the ink cylinder.

According to the second aspect of the present invention, the slide stopper has a protruding shape toward the application part, the outside of which is in contact with the ink and the inside is a hollow pressure receiving part. It has a seal portion that is in close contact with the inner surface. In the applicator of the present invention, when the internal pressure of the ink cylinder rises or an inertial force acts on the ink due to the impact of the drop, a force is applied to the pressure receiving portion. And in the applicator of the present invention, since the pressure receiving portion of the slide stopper has a protruding shape toward the application portion side and is hollow inside,
When subjected to force, it tends to deform flat or concave. Further, since the pressure receiving portion of the slide plug has a protruding shape and is deformed into a flat or concave shape, the outer periphery thereof expands. Here, since the seal portion is continuous with the pressure receiving portion, when the pressure receiving portion is deformed into a flat or concave shape and the outer periphery of the pressure receiving portion expands, the seal portion also expands in the circumferential direction, and comes into closer contact with the inner surface of the ink cylinder. . Therefore, the sliding resistance between the slide stopper and the ink cylinder temporarily increases, and the slide stopper is prevented from retreating.

According to a third aspect of the present invention, which is an improvement of the above invention, the slide stopper has a cylindrical main body, and a pressure receiving portion and a seal portion are provided at an end of the main body on the application portion side. And
The applicator according to claim 1, further comprising a steadying member provided on a side surface of the main body to contact the inner surface of the ink cylinder and maintain a posture of the slide stopper.

In the applicator of the present invention, the slide stopper has a cylindrical main body, a pressure receiving portion and a seal portion are provided at an end of the main body on the application portion side, and ink is provided on a side surface of the main body. A steady member is provided in contact with the inner surface of the cylinder to hold the position of the slide stopper. Therefore, the slide stopper moves straight without tilting. In addition, even when the internal pressure of the ink cylinder rises or when it receives an impact, the slide stopper is
Since the posture concentric with the axis of the ink cylinder is maintained, the pressure receiving portion responds to an increase in the pressure of the ink under ideal conditions, and uniformly expands the diameter of the seal portion.

According to a fourth aspect of the present invention, which is an improvement of the above-mentioned aspect, the slide stopper is made of a flexible rubber or resin. It is an applicator of the description.

In the applicator of the present invention, since the slide stopper is made of flexible rubber or resin, it is sensitive to the rise in the internal pressure of the ink cylinder and the force due to the inertial force, and the pressure receiving portion is deformed. The seal part expands in diameter.

[0020]

Embodiments of the present invention will be described below. FIG. 1 is a cross-sectional view of the applicator according to the embodiment of the present invention. FIG. 2 is a front view, a right side view, a left side view, and a front sectional view of the slide stopper acting on the applicator of FIG. FIG. 3 is an enlarged sectional view of a slide stopper acting on the applicator of FIG. FIG. 4 and FIG. 6 are cross-sectional views of main parts of the slide stopper showing a modification of the slide stopper.

The applicator 1 according to the embodiment of the present invention shown in FIG.
Is composed of a main body (ink cylinder) 2, a tail plug 3, a tip plug 5, a bellows type valve 6, and a slide plug 7. To explain sequentially, the main body 2 functions as an ink cylinder in this example, and is a cylindrical body made of a transparent or translucent material so that the remaining amount of ink can be visually checked. A tip plug 5 is attached to the tip of the main body (ink cylinder) 2. The tip plug 5 constitutes an application part, and has a pen tip 8 made of felt or resin.

Although the inside of the main body (ink cylinder) 2 is a cavity having a substantially uniform circular cross section, a portion near the front end, that is, near the portion where the rear end of the tip plug (coating portion) 5 is located, is provided. A constricted portion 10 is provided, and the bellows-type valve 6 is disposed in the constricted portion 10. Further, a slide stopper 7 is arranged inside the main body 2. The configuration of the slide stopper 7 is unique to the present invention and will be described in detail. Slide stopper 7
Is a stopper made of a flexible material such as rubber or resin. The shape of the slide plug 7 is as shown in FIG. 2 and has a cylindrical main body 20. The distal end side of the main body 20 has a protruding shape in which a gentle arc surface is drawn. The protruding portion at the tip of the slide stopper 7 functions as the pressure receiving portion 21.
The interior of the main body 20 is hollow as shown in FIG. 2D, and the rear end side of the slide plug 7 is open. Pressure receiving part 2
1 is thinner than other parts so that it can be easily deformed.

A seal portion 22 is provided on the peripheral surface on the distal end side of the slide plug 7. The seal part 22 is a part whose outer shape is made larger than other parts. The cross-sectional shape of the seal portion 22 is as shown in FIGS.
Are provided substantially perpendicularly to. The seal portion 22 is continuous with the pressure receiving portion 21 by a gentle curved surface. Therefore, the seal portion 22 is strongly affected by the deformation of the pressure receiving portion 21, and when the pressure receiving portion 21 is deformed, the outer diameter of the seal portion 22 changes.

A steadying member 23 is formed on the peripheral surface on the rear end side of the slide plug 7. The steady rest member 23 is
As shown in FIG. 2D, the protrusions are substantially triangular.
As shown in c), eight are provided at equal intervals on the peripheral surface.
A circle connecting the outermost sides of the steady members 23 is substantially equal to the main body 2 described above.

The slide stopper 7 is disposed inside the main body 2, and the pressure receiving portion 21 at the front end is in contact with the rear end of the ink 12 as shown in FIGS. 1 (a) and 1 (b). Further, the seal portion 22 of the slide plug 7 is in close contact with the inner surface of the main body 2 to maintain liquid tightness. Further, the steady rest member 23 is in contact with the main body 2 and maintains the posture of the slide plug 7. The slide stopper 7 can move the main body 2 in the axial direction while maintaining the liquid tightness. In addition, since the posture is held by the steady rest member 23, the slide stopper 7 is always concentric with the main body 2. Move inside the main body 2 while maintaining the posture.

In the applicator 1, a space in the main body 2 surrounded by the slide stopper 7 and the bellows type valve 6 functions as an ink tank 11. The ink tank 11 is filled with the ink 12 in a fluid state and without a gas. Tail plug 3,
It is attached to the rear end of the main body 2.

Next, the function of the applicator 1 of the present embodiment will be described. The method of using the applicator 1 is the same as that of the related art. When the pen tip 8 is pressed against paper or the like, the ink 12 is applied from the pen tip 8 to the paper surface. When the ink 12 is applied and consumed, the ink 12 in the ink tank 11 flows into the tip plug 5 side, and new ink is supplied to the pen tip 8. Further, with the outflow of the ink 12 from the ink tank 11, the slide stopper 7 moves to the tip stopper 5 side.

In the applicator 1 of the present embodiment, when the internal pressure of the ink tank 11 rises or the applicator 1 drops by mistake, the slide stopper 7 performs a specific function. For example, when the internal pressure of the ink tank 11 increases due to an increase in the ambient temperature, the pressure receiving portion 21 of the slide stopper 7 is deformed by the pressure of the ink 12. More specifically, the protruding shape of the pressure receiving portion 21 is flat or nearly concave. As a result, as shown by the two-dot chain line in FIG. 3, the outer periphery of the pressure receiving portion 21 expands, and the diameter of the seal portion 22 that is continuous with the pressure receiving portion 21 increases.
Therefore, the seal portion 22 strongly presses the inner surface of the main body 2, and the sliding resistance between the slide plug 7 and the main body 2 increases, and the slide plug 7
Is prevented from retreating. No air enters the ink tank 11. The same applies to the case where the ink applicator 1 is dropped and an inertia force acts on the ink 12, and the pressure receiving section 21 is temporarily flattened or concaved by receiving a force from the ink 12,
The outer periphery of 1 expands and the seal portion 22 expands in diameter, so that the slide plug 7 is prevented from retreating.

In the above embodiment, the pressure receiving portion 21 has an arc shape. When the pressure receiving portion 21 has an arc shape as shown in the present embodiment, when the pressure of the ink 12 is received, the outer periphery of the pressure receiving portion 21 spreads evenly, and the seal portion 22 presses the inner surface of the main body 2 in a balanced manner. Recommended. However, in the present invention, the shape of the pressure receiving portion 21 is not limited to an arc, and a conical shape, a truncated conical shape, a truncated pyramid shape, or the like can be adopted. Further, in the above-described embodiment, a case where the thickness of the pressure receiving portion 21 is thinner than other portions is shown as a recommended example, but the present invention is not limited to this configuration. That is, the present invention provides the pressure receiving unit 2
There is no limitation on the ratio between the thickness of 1 and the thickness of the main body 20. As another recommended example, the material of the pressure receiving portion 21 is made softer than that of the main body portion 20 so that the pressure receiving portion 21 is easily deformed and the main body portion 20 is hardly deformed. No.

In the above embodiment, the sealing portion 22
The cross-sectional shape of is shown in FIGS. 2 (d) and 3 and is provided substantially perpendicular to the main body 20. However, as shown in FIG. In some cases, the shape may be changed. As shown in FIG. 4 (a), when the shape is inclined toward the tail plug side,
When the pressure receiving member 21 is deformed, as shown in FIG. 4B, the seal portion 22 is in a nearly vertical posture, the outer diameter increases, and the inner surface of the main body 2 is pressed more strongly. As the shape of the seal portion 22, it is also recommended to use a shape having a rounded tip at the tip as shown in FIG. 5A or an edge shape as shown in FIG. 5B. FIG.
When the seal portion 22 has a round shape as shown in FIG.
There is an advantage that the sealed state does not change even if the angle of the seal portion 22 or the contact position with the inner surface of the main body 2 slightly changes.
In the case of the edge shape as shown in FIG. 5B, the tip of the seal portion 22 is easily deformed, the interference with the inner surface of the main body 2 can be made large, and there is a specific effect that the reliability of the seal is high. .

In the above-described embodiment, the slide stopper 7
The thickness of the connecting portion between the seal portion 22 and the main body portion 20 is the same as the thickness of the other portions as shown in FIGS. 2 and 3, but the thickness of the connecting portion is intentionally increased as shown in FIG. It is also recommended to make it thinner. As shown in FIG. 6, when the thickness of the connecting portion is reduced, the pressure receiving portion 21 is easily spread in the outer peripheral direction, the diameter of the seal portion 22 is increased, and the sliding resistance is significantly increased.

The embodiment shown in FIG.
However, the present invention is also applicable to an applicator having a configuration without a valve as exemplified in the description of the related art.

[0033]

According to the first aspect of the present invention, when the pressure in the ink cylinder rises due to an increase in ambient temperature or a drop, the pressure receiving portion is deformed and the seal portion is expanded, so that the slide stopper and the ink cylinder are inflated. And the sliding resistance between them increases. Therefore, even if the ambient temperature rises or falls, the slide stopper does not recede, and no air enters the ink cylinder. For this reason, the applicator of the present invention is less likely to cause ink blurring and dropping due to gas mixing.

Further, in the applicator according to the second aspect, when the internal pressure of the ink cylinder rises or an inertia force acts on the ink due to the impact of the drop, a force is applied to the pressure receiving portion, and the pressure receiving portion is deformed flat or concave. Then, the pressure receiving portion spreads outward, and the diameter of the seal portion connected to the pressure receiving portion increases. Therefore, the sliding resistance between the slide stopper and the ink cylinder temporarily increases, and the slide stopper is prevented from retreating. Therefore, the applicator of the present invention is less likely to cause ink blurring and dropping due to gas mixing.

Further, in the applicator according to the third aspect, the slide stopper can maintain a posture concentric with the axis of the ink cylinder, and the pressure receiving portion responds to an increase in ink pressure or the like under ideal conditions. Increase the diameter of the seal part evenly.

Further, in the applicator according to the fourth aspect, since the slide stopper is made of a flexible rubber or resin, the slide stopper is sensitive to a rise in the internal pressure of the ink cylinder and a force due to an inertia force. The pressure receiving portion is deformed, and the diameter of the seal portion is increased.
Therefore, the applicator according to the present invention has an effect of reducing ink blurring and dropping due to mixing of gas.

[Brief description of the drawings]

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

FIG. 2 is a front view of a slide stopper acting on the applicator of FIG. 1;
It is a right side view, a left side view, and a front sectional view.

FIG. 3 is an enlarged sectional view of a slide stopper acting on the applicator of FIG. 1;

FIG. 4 is a sectional view of a main part of a slide stopper showing a modification of the slide stopper.

FIG. 5 is a sectional view of a main part of a slide stopper showing a modification of the slide stopper.

FIG. 6 is a sectional view of a main part of a slide stopper showing a modification of the slide stopper.

FIG. 7 is a cross-sectional view of a conventional applicator with a slide stopper.

FIG. 8 is a perspective view of a slide stopper used in a conventional applicator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Applicator 2 Main body (ink cylinder) 3 Tail plug 5 Tip plug (Applicator) 6 Bellows type valve 7 Slide stopper 11 Ink tank 12 Ink 20 Main part 21 Pressure receiving part 22 Seal part 23 Anti-sway member

Claims (4)

[Claims] 1. An ink cylinder having a built-in ink in a state of maintaining fluidity, an application section connected to a tip of the ink cylinder, and moving inside the ink cylinder following consumption of the ink. In an applicator provided with a slide stopper that slides, the slide stopper has a seal portion that is in close contact with the inner surface of the ink cylinder, and a pressure receiving part that is in contact with the rear end of the ink. An applicator characterized in that a part is deformed and a diameter of a seal part is increased. 2. An ink cylinder having a built-in ink in a state of maintaining fluidity, an application portion connected to a tip of the ink cylinder, and moving inside the ink cylinder following consumption of the ink. In the applicator provided with a slide stopper that slides, the slide stopper has a protruding shape toward the application portion side, the outside of which is in contact with the ink and the inside is a pressure receiving portion having a cavity, and the inner surface of the ink cylinder which is continuous with the pressure receiving portion and is continuous with the pressure receiving portion. An applicator characterized by having a seal portion which is in close contact with the coating device. 3. The slide stopper has a cylindrical main body, a pressure receiving part and a seal part are provided at an end of the main body on the application part side, and a side surface of the main part is in contact with an inner surface of the ink cylinder. The applicator according to claim 1 or 2, further comprising a steadying member for holding the slide stopper in a posture. 4. The applicator according to claim 1, wherein the slide stopper is made of a flexible rubber or resin.