JP2512321Y2 - Pen body - Google Patents

Description

TECHNICAL FIELD OF THE INVENTION The present invention relates to a pen body. More specifically, the present invention relates to a pen body in which a slit is provided at the tip of a nib-shaped metal plate piece, and a flat plate-shaped enlarging portion having a vertical capillary gap communicating with the slit therein is formed by bending. .

2. Description of the Related Art A pen body in which a slit is formed in a metal plate piece as described above, and a capillary gap of a bent flat plate-shaped enlarged portion is communicated with the slit is disclosed in Japanese Utility Model Laid-Open No. Sho 62-19286. .

Problems to be solved by the invention In this type of pen body, the capillary gap of the flat plate-shaped enlarging part fulfills the ink storage function, and the ink followability is set better than that of a pen body having only slits. While there is an advantage that can be done, when writing, the inner edge of the flattened enlarging part of the pen tip scratches the paper-contacting surface (especially rough paper quality) slightly, resulting in damage to fine paper pieces and dust on the paper surface. Foreign substances such as the like are successively accumulated in the capillary gaps of the flat plate-shaped enlarged portion, and as a result, the capillary gaps are clogged, the ink outflow property is deteriorated, and there is a risk that the ink cannot be outflowed at last.

An object of the present invention is to provide a pen body that avoids the trouble caused by the ink outflow deterioration due to the clogging of the capillary gap at the time of writing and maintains the initial ink outflow performance.

Means for Solving Problems The pen body 1 of the present invention will be described with reference to the drawings (see FIGS. 1 to 3).

The pen body 1 according to the present invention has a rigid elastic metal in which both sides toward the tip are tapered and the flattened enlarged portion 3 is bent so that its lower surface faces the center line as a fold. A pen body which is made of a plate piece and has a slit 2 arranged at the center line of the tip of the metal plate piece, and a vertical gap 31 communicating with the slit 2 is formed in the flat plate-shaped enlarged portion 3. However, the capillary gap 31 is required to be formed in a wide width vertically upward.

In the above description, the metal plate piece may be an ink resistant member having a rigid elasticity, and stainless steel thin plates, plated members of various metal thin plates and the like are effective.

The slit 2 is formed by a conventionally known cutting process, shearing process, or the like, and is disposed at least in the axial length of the flat plate-shaped enlarged portion 3.

The slit 2 has a groove width of 0.02 to 0 at the position of the flattened enlarged portion 3.
9 mm (preferably 0.03 to 0.3 mm), the groove width of the portion extending rearward beyond the position of the flat plate-shaped enlarged portion 3 is 0 to 0.9 mm.
A range of (preferably 0.01 to 0.2 mm) is effective.

The vertical length of the flat plate-shaped enlarged portion 3 is about 0.3 to 1.2 mm, and the axial length is about 0.3 to 2 mm, which is practical in terms of function and appearance.

The capillary gap 31 formed in the flat plate-shaped enlarged portion 3 is formed such that the upper side in the vertical direction is wider than the paper contact surface side, and the slit 2 is on the upper side.
The groove width of the slit 2 may be 0 mm to 0.3 mm (preferably 0.
(08 mm or less) is effective from the viewpoints of ink outflow, writing quality, and foreign matter penetration into the capillary gap 31 from the writing surface during writing.

The groove width of the slit 2 and the paper-contacting part is 0 mm, but it is a value in a non-writing state (a state in which writing pressure is not applied to the pen tip), and a slight curved surface is formed on the plate piece of the substrate. In this system, the groove width is elastically expanded slightly by the writing pressure to form the capillary gap 31 effective for writing.

The pen body 1 can be incorporated into an ink adjusting member (for example, a conventionally known ink adjusting member having a comb groove and an ink groove vertically extending through the comb groove) to form a fountain pen-type writing instrument, as a matter of course. In the body 1, the ink guide core is closely arranged in the axial direction of the lower side of the slit 2, and the tip end thereof is connected to the capillary gap 31 of the flat plate-shaped enlarging portion 3 to form a support arranged below the ink guide core. It is possible to configure a writing instrument of a type in which the ink is led out from the ink storage portion at the rear portion of the shaft cylinder by combining the ink and the ink adjustment member or the like.

Action The tip of the flat plate-shaped enlarging portion 3 functions as a pen tip, and the vertical capillary gap 31 formed in the flat plate-shaped enlarging portion 3 is formed.
Has a small groove width in the paper contact surface direction, so that the capillary force works effectively in the pen tip direction, and it also works effectively for ink outflow, as well as fine paper pieces caused by damage to the paper surface during writing. Even if foreign matter such as foreign matter enters the capillary gap 31, these foreign matter do not stay and move sequentially to the wide gap (upward slit 2 direction) and are discharged from the slit 2 to clog the pen tip. Maintains proper initial ink outflow.

Example (See Fig. 2) A stainless steel thin plate (thickness: 0.
25mm) from the tip to the axial centerline, groove width 0.01mm, total length 4mm
After arranging the slits 2 by shearing, the two bulge-shaped tips with the center line as a fold are bent so that their lower surfaces face each other, and a vertical capillary gap communicating with the slits 2 is formed. A flat plate-shaped enlarging part 3 having 31 inside was constructed.

A vertical capillary gap 31 communicating with the slit 2 is formed between the flat plate-shaped enlarged portions 3. The flattened enlarged portion 3 after the bending process has a vertical length of 0.8 mm and an axial length of 1.2 mm, and the formed capillary gap 31 is 0.06 m.
The width is tapered from the upper part of the m width toward the lower end of the writing end, and is 0.02 mm at the lower end contact part.

An ink induction core [resin-processed body of polyester fiber (porosity of about 60
%) Are arranged in contact with each other, and the tapered portion of the induction core is provided with a flat plate-shaped enlarged portion 3
A support member connected to the capillary gap 31 and made of a plastic molded body (that is, an ink adjusting device having a comb groove and an axial ink groove extending longitudinally through the comb groove in the rear portion, and having a central hole formed therein). (Members are arranged in series) and attached to the tip of the shaft barrel to draw out the ink from the ink storage portion of the rear shaft barrel (illustration omitted).

The pen body function can be similarly satisfied by connecting the ink guide core to the ink storage body, which is formed by the fiber bundle processing body for the insertion, without connecting the ink guide core to the ink adjusting member. A writing instrument can also be configured.

Water-based ink (viscosity: 1.5 mPa.s, surface tension: 50 mN / m) was filled in the writing instrument of the above example, and writing was performed on various types of paper, and an appropriate amount of ink was penned without clogging the capillary gap 31. I was able to continue writing by draining it from the beginning. on the other hand,
With a writing instrument using a conventional type pen body (Figs. 4 and 5), if writing is continued on paper with a rough and non-smooth paper surface, fine fibrous paper pieces and writing surfaces in the capillary gap 31 By accumulating such fine foreign matters, the ink outflow property often deteriorates or an ink outflow phenomenon occurs.

Effect of the Invention With the pen body of the present invention, even if foreign matter enters the capillary gap of the flat plate-shaped enlarged portion, it is sequentially discharged from the upper slit and does not cause clogging of the capillary gap. It can be used for writing without anxiety until the ink is completely consumed, which is a great practical effect.

[Brief description of drawings]

1 is a perspective view of the pen body of the present invention, FIG. 2 is an enlarged sectional view of the pen body of FIG. 1 taken along the line AA, FIG. 3 is an enlarged sectional view of another example, FIG. 4 and FIG. FIG. 5 is an enlarged sectional view showing a state of a capillary gap in a conventional pen body. 1 ... Pen body, 3 ... Flat plate-shaped enlarged part 2 ... Slit, 31 ... Capillary gap

Claims (1)

(57) [Scope of utility model registration request] 1. A flat plate-shaped enlarging portion (3) having a tapered shape on both sides toward the tip and having a center line as a fold at the tip.
Is made of a metal plate piece that is bent and formed so that its lower surfaces face each other and has a slit (2) at the center line of the tip of the metal plate piece, and inside the flat plate-shaped enlarged portion (3). In the pen body in which a vertical capillary gap (31) communicating with the slit (2) is formed, the capillary gap (31) is formed in a wide width vertically upward. .