JPH06227196A - Writing implement - Google Patents

Abstract

PURPOSE:To prevent the insufficient discharge of ink by a method in which most part of an ink tank part is covered with an exterior body to prevent the direct heat transfer from the hand to the ink tank part, the temperature change due to the air volume change is controlled, and the air volume change is compensated. CONSTITUTION:In the main body 1 of a writing implement, a temporary ink storage member 4 having a channel with a comb-shaped cross section is attached on the front shaft part 3 of a cylindrical shaft 2. The temporary ink storage member 4, which is integrated with a chip holder, is equipped with an assembly of a pen point 5 and its holder 6 at the end. An ink relay core 7 connecting the pen point 5 with ink in the holder 6 is projected into an ink tank part 8 through the temporary ink storage member 4. An exterior body 11 which makes the main body 1 an exchangeable cartridge is attached detachably in the rear shaft part 9 of the cylindrical shaft 2; that is, most part of the ink tank part is covered with the exterior body. In this way, the transmission of human body temperature to the ink tank part is made indirect to control the air volume change.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a raw ink type writing instrument, that is, a writing instrument adapted to accommodate ink in a raw ink state.

[0002]

2. Description of the Related Art As represented by an ordinary fountain pen, a general raw ink type writing instrument has an ink tank as a separate body disposed inside a barrel, and the ink is contained in the ink tank. Here, when the ink is consumed, the ink tank is replaced or the ink is sucked and stored in the ink tank.

On the other hand, recently, a disposable type, which is a raw ink type, in which the ink is discarded when the ink is used up, is becoming popular. Certainly, it can be said that it is preferable to use a new pen such as a ball-point pen having a relatively short pen tip life rather than replacing only the ink tank.

In such a disposable type, the shaft cylinder and the ink tank are generally integrated in order to suppress the manufacturing cost as much as possible. That is, the ink is directly stored in the rear portion of the barrel without disposing an ink tank as a separate body in the barrel.

[0005]

As is well known, in a raw ink type writing instrument, the volume change of the ink in the ink tank which enters in substitution for consumption of ink adversely affects the ink ejection. Therefore, as a mechanism for suppressing this, a temporary ink reservoir member such as one having a temporary ink reservoir having a comb-shaped vertical cross section is used, or a valve structure is adopted.

In this respect, the above-mentioned barrel-
In the ink tank integrated type, the body temperature when gripped is directly transmitted to the shaft cylinder, and therefore the ink tank, so that the internal air expands easily, and it is better than the case where a separate ink tank is placed in the shaft cylinder. It is extremely disadvantageous.

[0007]

[Means for Solving the Problems] The use of an outer package is considered there. Since the body temperature transmission is made indirect by the multi-layered shaft, of course, unlike the case where only the ink tank is replaced, the whole writing instrument body is replaced.
For example, among high-class products, there is one in which the main body of the writing instrument is used as a cartridge for an exterior body composed of a front member and a rear member, and the idea can be utilized.

However, in addition to the above, in consideration of increasing the capacity of the mechanism for suppressing the adverse effect on the ink ejection due to the above-mentioned volume change of air, the whole body of the writing instrument as a cartridge is covered with the exterior body. Instead, it is preferable that the shaft cylinder of the writing instrument main body is integrated with the front shaft part and the rear shaft part, and the rear shaft part that contains ink is covered with the exterior body, and the front shaft part is exposed from the exterior body. . That is, by not only suppressing the temperature change that causes the volume change of the air but also making the capacity of the suppressing mechanism sufficient as a compensation for the result of the volume change of the air, the ink due to the volume change of the air is comprehensively obtained. In order to exert the function of suppressing the adverse effect on the discharge extremely favorably, the gist of the present invention is "the barrel of the writing instrument main body, in which the pen tip portion is projected at the tip and the front shaft for containing the ink in the raw ink state at the rear portion" Part and the rear shaft part are integrated, and it is preferable to use a writing tool in which an exterior body having a replaceable cartridge as the main body of the writing device is detachably fitted to the rear shaft part of the barrel. .

[0009]

DETAILED DESCRIPTION An example will be described with reference to the accompanying drawings. In the writing instrument main body 1, the front shaft portion 3 of the shaft cylinder 2 accommodates a temporary ink reservoir member 4 having a temporary ink reservoir groove having a comb-shaped vertical cross section. This temporary ink reservoir member 4
Is integrated with a so-called tip holder, and has an assembly (external appearance) of the pen tip 5 and the pen tip holder 6 attached to the tip thereof. An ink relay core 7 for ink connection with the pen tip 5 in the pen tip holder is inserted through the through hole of the temporary ink reservoir member 4 so that the rear portion thereof projects into the ink tank portion 8. Here, in the ink tank portion 8, the rear shaft portion 9 of the shaft cylinder 2 is directly used as a wall body. Reference numeral 10 indicates a liquid-tight packing, and this liquid-tight packing 10 is a boundary of the ink tank portion 8.

Preferably, a transparent material capable of seeing through the barrel 2 such as polyethylene terephthalate is used.
It is made of synthetic resin such as polyester, polyethylene, polypropylene, nylon and polycarbonate. A state of exhibiting a function of suppressing an adverse effect on ink ejection due to a change in volume of air, in the illustrated case, a temporary ink reservoir member 4
It is generally possible to visually confirm the state of exhibiting the temporary ink reservoir function due to, and the temporary ink reservoir member 4 is generally an extremely precise molded product using ABS resin or the like.
The appearance of the temporary ink fountain member 4 makes it possible to feel a kind of beauty of a craft, and further, the ink color is discriminated by the ink located on the surface of the temporary ink fountain member 4, By making the temporary ink reservoir member 4 itself of an ink color, there is a great advantage that the temporary ink reservoir member 4 can also be used as an ink color display member. Of course, it is not necessary to make the whole of the barrel 2 visible through the inside, and printing or the like may be performed at an appropriate portion.

An exterior body 11 appropriately selected in terms of material, shape, pattern, color and the like is attached to the writing instrument main body 1 so as to be attachable / detachable for the purpose of imparting a high-class feeling as a product. The writing instrument main body 1 is used as a replaceable cartridge with respect to the exterior body 11, but in the illustrated one, the contact portion with the open end 12 of the exterior body 11 is modified. Specifically, as shown in FIG. 2, the shaft cylinder 2 is a double shaft portion in this portion, and its outer shaft portion 13 is a contact portion for the opening end portion 12 of the exterior body 11. . The outer body 11 can exhibit elasticity as much as it is made thinner.
It can also contribute to preventing loose fitting. Moreover, the outer shaft portion 13 is adapted to be externally inserted into the front end portion 14 of the open end portion 12 of the exterior body 11. By utilizing the radial elasticity of the double shaft portion of the shaft cylinder 2, when the writing tool body 1 and the exterior body 11 are assembled, such as when the writing tool body 1 is exchanged, the shaft cylinder 2 and the exterior body are required each time. It is possible to suppress that the overall shape is different due to the outer diameter variation of 11.
Here, reference numeral 15 indicates a separate decorative ring as a part of the exterior body 11, but it does not matter whether the decorative ring 15 is provided or not.

Further, the presence of the double shaft portion, the shaft cylinder 2 made of a transparent material capable of seeing through the inside, and
As shown in the figure, the front portion 16 of the ink tank portion 8 also includes the exterior body 11
In combination with making it more exposed,
For example, as shown in FIG. 3, even if the contact relationship that the outer shaft portion 13 of the double shaft portion is externally fitted to the front end portion 14 of the opening end portion 12 described above is not satisfied, it is possible to confirm the remaining ink amount. It will be preferable from the above. That is, basically, since the barrel 2 is made of a transparent material capable of seeing through the interior, and the front portion 16 of the ink tank portion 8 is also exposed from the exterior body 11, it is possible to confirm the remaining amount of ink. Can be done easily, and in fact, this is fine, but with a single-axis structure instead of a double-axis structure, the wall thickness of the shaft cylinder is ignored, and ink is present up to the surface part of the cylinder. , Even if only a small amount of ink remains, it will make you feel as if you still have a sufficient amount of ink.
When the double shaft structure is used, the outer shaft portion 13 is formed by the cavity 17.
Does not show the appearance as if the ink exists up to the diameter of the outer shaft portion 13, and it is possible to reduce the error in the ink remaining amount prediction.

By the way, the fact that the shaft cylinder 2 is made of a transparent material capable of seeing through the interior and has a double shaft part in the contact portion with the outer casing 11 means that the cavity 17 has a cylindrical shape or a polygonal cylinder. Regardless of whether it is in the shape of a cylinder or is divided into a plurality of arcs by radial ribs, etc., various display objects such as the user's name and telephone number, and accessories It also has an advantage that items such as − can be exchangeably accommodated from the rear end opening side of the cavity 17 sealed by the exterior body 11 as needed.

Although a preferred example has been described above, the invention can be appropriately performed without departing from the scope of the present invention. For example, the pen nib 5 is shown in consideration of a synthetic resin flat plate known in Japanese Utility Model Publication No. 57-42711, etc., but a fiber converging body pen nib, a ball nib, and a brush tip A urethane foam nib may be used as appropriate, and the ink may be used as general writing ink, handwriting correction ink, cosmetic ink, or the like. Furthermore, a mechanism for suppressing the adverse effect on ink ejection due to a change in the volume of air may be appropriately adopted, and a concavo-convex fit or the like may be used for detachable fitting between the writing instrument main body 1 and the exterior body 11.

[0015]

According to the present invention, the shaft cylinder of the writing instrument main body is
The pen tip portion is projected at the tip and the front shaft portion and the rear shaft portion for accommodating the ink in the raw ink state are integrally formed at the rear portion, and the exterior body having the writing instrument main body as a replaceable cartridge is described above. Since the writing tool is detachably fitted to the rear barrel of the barrel, at least most of the ink tank is covered with the exterior body, which makes it possible to indirectly transfer body temperature to the ink tank. In addition to suppressing the temperature change that causes the volume change of the air conditioner, the front shaft exposed from the exterior body can accommodate the suppression mechanism with sufficient capacity as a compensation for the result of the volume change of the air. As a result, the function of suppressing the adverse effect on the ink ejection due to the volume change of air can be exerted extremely favorably.

[Brief description of drawings]

FIG. 1 is a vertical sectional view for explaining an embodiment of the present invention.

FIG. 2 is an enlarged view of part A in FIG.

FIG. 3 is a view corresponding to FIG. 2 showing another example of the fitted state of the writing instrument main body and the exterior body.

[Explanation of symbols]

 1 Writing Instrument Main Body 2 Shaft Cylinder 3 Front Shaft Part 4 Temporary Ink Reservoir Member 5 Nib 6 Nib Holder 7 Ink Relay Core 8 Ink Tank 9 Rear Shaft 10 Liquid-tight Packing 11 Exterior Body 12 Open End 13 Outer Shaft Part 14 Front end of open end of exterior body 15 Decorative ring 16 Front of ink tank 17 Cavity 18 Longitudinal rib on inner wall of ink tank 19 Cap

Claims (1)

[Claims] 1. The writing instrument main body comprises a barrel having a pen tip portion protruding from the tip and a front shaft portion and a rear shaft portion for accommodating ink in a raw ink state at the rear portion, and the writing instrument body is replaced. A writing instrument in which an exterior body as a possible cartridge is detachably fitted to the rear barrel portion of the barrel.