JPH0354930Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a writing instrument cartridge suitable for use in a knock-type writing instrument, which has an appropriate ejection mechanism such as a rotational feeding mechanism or a pressure feeding mechanism.

[Conventional technology and its problems]

Note-type writing instruments have excellent operability, as there is no need to remove and remove the cap each time you use them, unlike regular writing instruments, but only writing instruments that use extremely viscous ink, such as oil-based ink ballpoint pens, are in practical use. Writing instruments using water-based ink, which are popular for general writing and have advantages such as the handwriting not penetrating to the back side of the paper and the ability to obtain clear, fine handwriting, have led to numerous inventions, Despite the invention, the current situation is that it has not reached the point where it can be put to practical use. The main reason for this is when not in use (when the cartridge is stored in the barrel)
In order to prevent the nib from drying out and the ink from inside to dry due to air flowing in from the air hole provided at the front of the writing instrument cartridge and causing ink to fade, a sealed structure is required within the tip of the barrel. The sealed structure is technically extremely advanced,
I ended up not being able to accomplish what I was aiming for.

Therefore, the applicant came to the conclusion that in order to obtain a practical writing instrument using water-based ink, there was a technical limit to the pursuit of a sealed structure.
As a countermeasure, it was previously proposed to provide an air hole in the tail plug at the rear of the writing instrument cartridge.

By the way, when selling such a writing instrument cartridge, it is preferable to store it in a sealed package for various reasons, but in this case, the pen tip of the writing instrument cartridge contacts the inner surface of the package, causing It has been found necessary to fit a protective cap over the nib because the area and its surroundings become smeared with ink.

However, since this protective cap is removed when the writing instrument cartridge is stored in the barrel of a knob-type writing instrument, using a cap similar to a normal writing instrument cap is problematic in terms of manufacturing costs. , which was not preferable from the viewpoint of resource conservation.

[Means for Solving the Problems] Therefore, the present invention attempts to solve the above-mentioned disadvantages by using a specific protective cap. The pen has a barrel made of a barrel, an ink storage body that can store water-based ink, an ink relay part, and a pen tip part, a tail plug is fixed to the rear part of the barrel, and an air hole is provided in the tail plug. and a hollow extrusion-molded long length of resin that is fitted into the front barrel to protect the pen nib of the writing instrument cartridge and is removed when the writing instrument cartridge is stored in the barrel of the lock-type writing instrument. The gist of this invention is a writing instrument cartridge for a lock-type writing instrument, which consists of a protective cap made by cutting an object, and a packaging body.

[Example] Reference numeral 11 is a writing instrument cartridge made of synthetic resin or metal, and the writing instrument cartridge 11 has a barrel 11 that is composed of a large diameter rear barrel 11a and a small diameter front barrel 11b. ', an ink storage part 12 made of a synthetic fiber bundle, felt, porous elastic body, etc., which stores water-based ink inside the shaft cylinder 11', and a synthetic fiber bundle, a porous material, etc., which is continuous with the ink storage part 12. The ink relay part 13 (the ink storage part 12 and the ink relay part 13
), a pen tip 14 disposed at the tip of the barrel 11', and a tail plug 16 fixed to the rear of the barrel 11' and having an air hole 15 formed therein.
It's getting more and more familiar. The writing instrument cartridge 11
A protective cap 17, which is made by cutting a long hollow extruded resin product that is removed when storing the writing instrument cartridge in the barrel of a lock-type writing instrument, is attached to the front barrel 11b to protect the pen tip 14. The writing instrument cartridge 11 is hermetically housed in a packaging body 18 such as a blister pack.
(See Fig. 1) Figs. 2 to 6 show other embodiments of the protective cap of the present invention, in which a hole 19 is provided in the side wall of the protective cap 17; 4 and 4 show a protection cap 17 in which four protruding ribs 20 are provided along the entire length of the inner wall surface, and FIG. 5 shows a protection cap 17 in which grooves 21 are provided in the longitudinal direction of the inner wall surface. This is the sixth
The figure shows a protective cap 17 having an irregular cross section, with a semicircular groove 22 provided in the longitudinal direction.

In the above-mentioned embodiments, the barrel is made up of a rear barrel with a large diameter and a front barrel with a small diameter, but the diameter of the front barrel may be formed into a stepped shape that faces forward and becomes smaller in diameter. .

[Effects of the invention] The invention has a barrel consisting of a large-diameter rear barrel and a small-diameter front barrel, an ink storage section that can absorb water-based ink, an ink relay section, and a pen tip section. , a writing instrument cartridge having a tail plug fixed to the rear part of the barrel and an air hole provided in the tail plug, and a writing instrument cartridge fitted into the front barrel to protect the pen nib of the writing instrument cartridge; This is a lock-type writing instrument cartridge for writing instruments, which consists of a packaging body and a protective cap made by cutting a long hollow extruded resin object that is removed when the writing instrument cartridge is stored in the barrel of the writing instrument. 11 pen nib part 1
4 and its surroundings will not be contaminated with ink, and the protective cap 17 is made by cutting a long hollow extruded resin product, and the protective cap 17 is covered with the small diameter front shaft cylinder 11b. Since it is designed to fit, a more favorable result can be obtained from the viewpoint of manufacturing cost and resource saving.

In addition, in the examples of FIGS. 2 to 6, FIG.
In the example shown in FIG. 4, the protective cap 17 is attached to the front shaft cylinder 1.
1', it is advantageous in that the fitting force can be further strengthened by the rib 20. In addition, in the examples shown in Figs. 2 to 6, the protective cap 17 is attached to the front shaft cylinder 11'. When fitting, even if you push it into the front shaft 11' with the head opening of the protective cap closed,
The air inside the protective cap 11 flows through the holes 19 and the ribs 2.
Air escapes from the protective cap 11 through the space between 0, the groove 21, and the semicircular groove 22, flows into the writing instrument cartridge, and moves the ink backward, eliminating ink shortage during writing. It has the additional advantage of being able to

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; Fig. 1 is a cutaway sectional view of the main parts of the writing instrument cartridge when stored in a package, and Figs. 2 to 6 are sectional views showing other embodiments of the protective cap. In addition, FIG. 4 is a sectional view taken along the line A--A in FIG. 3. 11... Writing instrument cartridge, 11a... Rear barrel, 11b... Front barrel, 11'... Axis barrel, 1
2... Ink storage section, 13... Ink relay section, 1
4... Pen tip portion, 15... Air hole, 16... Tail plug, 17... Protective cap, 18... Packaging body.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A shaft cylinder consisting of a large diameter rear shaft cylinder and a small diameter front shaft cylinder, an ink storage part that can store water-based ink,
A writing instrument cartridge which has an ink relay part and a pen tip part, a tail plug is fixed to the rear part of the barrel, and an air hole is provided in the tail plug part, and the pen nib part of the writing instrument cartridge is protected. A protective cap that is fitted into the front barrel and is removed when the writing instrument cartridge is stored in the barrel of the knob-type writing instrument, and is made by cutting a long hollow extrusion-molded resin product, and a notch that is made of a packaging body. Writing instrument cartridge for type writing instruments. (2) A writing instrument cartridge for a lock-type writing instrument according to claim 1 of the utility model registration, which comprises a hole provided in the side wall of the protective cap. (3) A writing instrument cartridge for a lock-type writing instrument according to claim 1 of the utility model registration claim, which is provided with longitudinal protruding ribs on the inner wall surface of the protective cap. (4) A writing instrument cartridge for a lock-type writing instrument according to claim 1, which is provided with a longitudinal groove on the inner wall surface of the protective cap.