JPS6139592Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is characterized in that the ink cylinder is filled with liquid ink and a backflow stopper for this ink, and the tip of the ink cylinder has a molded pen nib made of synthetic resin or a writing ball such as a rolling ball. The present invention relates to a closure device that can be attached to and detached from a cartridge provided with a member.

Conventionally, a closure device was constructed by attaching and detaching a synthetic resin cap to the cartridge. This closure device does not have an air circulation means in the cap itself, nor does it have a structure in which the air circulation means is composed of the cap and the ink container. It has a structure that is in close contact with the outer peripheral surface of the cylinder and blocks air circulation inside and outside the cap.

Therefore, if a cap is placed over an ink cylinder, air circulation is blocked and the ink impregnated in the writing member at the tip of the ink cylinder is prevented from drying. The use of the above-mentioned known closure device in a cartridge filled with a backflow stopper that prevents air flow has the following disadvantages.

That is, in the well-known closure device, the cap itself does not have an air circulation means, and the cap and the ink cylinder do not constitute an air circulation means, so when the cap is placed over the ink cylinder, the internal pressure of the cap increases. If the writing member is the molded nib, part of the air in the cap will flow into the liquid ink through the nib, and if the writing member is a rolling ball, a small gap between the rolling ball and the ball holder will flow into the liquid ink. into the liquid ink. The air that has flowed into the liquid ink has no place to escape due to the backflow stop that prevents air circulation, and remains as air bubbles within the liquid ink, which is disadvantageous in that it impedes the smooth oozing of the ink during writing. It has

The present invention was developed by focusing on the well-known above-mentioned closure device, and consists of a hollow desorption body that is attached to and detached from a cartridge, and the desorption body itself has an air circulation means, or it is combined with the hollow desorption body. When the hollow removable body is attached to the cartridge by forming an air circulation means with the cartridge, the air inside the desorption body is discharged to the outside to prevent the internal pressure from increasing. prevents air bubbles from flowing into the liquid ink,
The feature is that the ink oozes out smoothly during writing, and the ink impregnated in the writing member is prevented from drying by forming a cover plate on the hollow removable body and providing a closing member. and protection of the tip of the writing member, thus,
It is characterized by being able to write clearly and with excellent writing quality at all times, and furthermore, even after the hollow removable body is attached to the cartridge, the internal pressure of the desorbable body is maintained by the circulating air by the air circulation means. It is characterized by being designed to prevent it from rising.

Embodiments of the present invention will be described with reference to the drawings. In each of the illustrated examples, air circulation means is constructed in the hollow detachable body itself.

Figure 1 shows a part of the cartridge using the closure device of the present invention, and the hollow removable body used in this figure has the structure shown in Figures 2 and 3. It is.

The cartridge a directly fills liquid ink (not shown; this liquid ink may be either water-based ink or oil-based ink) into the ink container _a1 , and also has grease or other backflow prevention material (not shown) at the end of the ink. This backflow stopper is filled with a backflow stopper that blocks air flow) and is equipped with a writing member _a2 made of a molded pen nib made of synthetic resin or a rolling ball at the tip.

To explain the first example of the hollow removable body b shown in FIGS. 2 and 3, the cover plate b ₁ is composed of a peripheral wall,
The cover plate is equipped with a non-liquid-absorbing, closed-cell closure member b ₂ that has stability, and this closure member closes the tip of the writing member a ₂ to contribute to preventing ink from drying. Part A ₂ Contributes to the protection of the tip. The removable body b has a fitting side b ₃ that fits into the ink container a ₁ on the opposite side of the cover plate b ₁ , and the cover plate b ₁
and the fitting side _b3 are connected by a pair of connecting plates _b4 , and a through hole is formed between the connecting plates to constitute a pair of air circulation means c. When this hollow removable body b is attached to the cartridge a, the air inside the removable body b is discharged to the outside by the air circulation means c, and the tip of the writing member _a2 is connected to the closing member in the cover plate _b1. b occluded by ₂ .
Therefore, there is no risk that the internal pressure of the detachable body b will increase during the above-mentioned mounting, and the air inside the detachable body b is absorbed by the cartridge a.
There is no risk of the ink flowing into _the liquid ink, and the ink at the tip of _the writing member _a2 is prevented from drying by the closing member _b2 . , paralysis, deformation, etc. are prevented and protected. Explaining the second example of the hollow removable body b shown in Figs. 4 and 5, this structure has one connecting plate b ₄ and one air circulation means c with a U-shaped front side. This example differs from the first example in that it is configured as follows. Third example of detachable body b shown in FIGS. 6 and 7
The shape of the cover plate b ₁ must be an inverted cone, and the mating side
The structure is different from the first and second examples in that b ₃ is configured as a ring, but the structure is similar to the second example in that there is one connecting plate b ₄ and one air circulation means c. ing.

When attaching the desorbing body b of the second and third examples to the cartridge a, the internal pressure of the desorbing body b does not increase as in the first example, and the air in the desorbing body b flows into the liquid ink. Instead, the tip of the writing member a ₂ is closed by the closing member b ₂ to prevent and protect the ink from drying.

The material of the closing member b ₂ provided on the cover plate b ₁ of the removable body b is selected from natural rubber, vinyl chloride resin, polyethylene resin, closed cell sponge, synthetic rubber, etc., and the structure and material of the writing member b ₂ , If the writing member _b2 is the molded nib, the softer one is better, and if it is a rolling ball, the harder one is better.

As is clear from the above explanation, when attaching the hollow removable body b to the cartridge a, the removable body b
If the air inside the desorbing body b is discharged to the outside without increasing the internal pressure of the cartridge a, the air inside the desorbing body b can be
Since it is possible to prevent the liquid ink from flowing into the liquid ink, the air circulation means c configured in the desorbing body b itself is
The embodiments are not limited to the above embodiments. Even if the air circulation means c is constituted by the cartridge a and the detachable body b, the same air discharging effect, the ink drying prevention effect and the protection effect of the writing member _a2 as described above are exerted.

As an example of configuring the air circulation means c by a cartridge a and a hollow detachable body b, the detachable body has a cylindrical structure, and an appropriate number of unillustrated parts are installed on the outer circumferential surface of the cartridge a or the inner circumferential surface of the detachable body b. The protrusions are set convexly,
These protrusions are arranged on the same circumference. With this configuration, when the detachable body b is attached, the air inside the detachable body b is discharged to the outside through the protrusions, and the air inside the detachable body b is exhausted.
This prevents the internal pressure from increasing, and there is no risk of air flowing into the liquid ink in the cartridge a. In this example, instead of an appropriate number of protrusions, intermittent protrusions may be provided and these protrusions may be arranged on the same circumference.

As described above, the present invention is configured so that when the hollow removable body is attached to the cartridge, the air inside the desorbable body is exhausted to the outside, so that an increase in the internal pressure of the desorption body can be prevented. Therefore, when the removable body is attached, the air inside the desorption body can be prevented from flowing into the liquid ink of the cartridge and forming bubbles, and the ink can be smoothly oozed out during writing, resulting in clear writing. . and,
The tip of the writing member is protected and prevented from drying by the closing member provided on the cover plate of the removable body, so it is possible to write immediately at any time, and it is easy to use the cover plate.
It has the effect of eliminating the inability to write due to deformation, etc.

Therefore, it is possible to provide a closing device suitable for use in a cartridge, which can fill an ink container with liquid ink and a backflow stopper, thereby achieving the intended purpose.

[Brief explanation of drawings]

FIG. 1 is a partially longitudinal front view showing a part of a cartridge equipped with the closure device of the present invention, FIG. 2 is a perspective view showing a first example of a detachable body for the closure device, and FIG. 4 is a perspective view showing a second example of the removable body, FIG. 5 is a vertical sectional view taken along the line - of FIG. 4, and FIG. 6 is a third example of the removable body. FIG. 7 is a vertical sectional view taken along the - line in FIG. 6, and FIGS.
FIG. 8 shows the relationship between the writing member formed by the molded pen tip of the cartridge and the closing member of the removable body, and FIG. 9 shows the relationship between the writing member formed by the rolling ball of the cartridge and the removable body. It is a figure showing the relationship with a closure member. In the figure, a is the cartridge, _a1 is the ink container, and _a2
is a writing member, b is a removable body, b ₁ is a covering body, b ₂ is a closing member, and c is an air circulation means.

Claims (1)

[Scope of utility model registration request] It consists of a cartridge in which the ink cylinder is filled with liquid ink and a backflow stopper, and a writing member is provided at the tip of the ink cylinder, and a hollow removable body that is attached to and detached from this cartridge. The removable body itself or the removable body and the cartridge constitute an air circulation means, and the cover plate is provided with a non-liquid-absorbing, non-opening foam, and resilient closing member. A writing part closing device for a liquid ink cartridge having a distinctive writing part.