JPH0514639B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Object of the Invention The present invention relates to a pipe pen body. More specifically, it connects and stably flows out an appropriate amount of ink with durability that is effective for fine line writing, and is suitable for fine line writing, drafting, various recording devices, plotters, printers, etc.
This invention relates to a pipe pen body that is effective for machine writing such as automatic drawing machines. Conventionally, a pen body using a metal thin tube has been put into practical use, in which a fine ink guide wire is loosely inserted into the thin tube so that it can come out and go out, and its tip slightly protrudes from the tip of the thin tube in the writing state. ,
It is limited to drafting and some recording purposes. In the pen body, when writing, the ink-guiding fine line oscillates, making it difficult to obtain a stable writing feeling, and the tip of the fine line tends to break.Especially when writing in a non-vertical position, the above-mentioned problems occur. Notably, he has no aptitude for writing. In an attempt to solve the above-mentioned problem, Japanese Utility Model Publication No. 56-48536 discloses a method in which one end of a metal pipe is drawn into a conical shape, iridium is welded to the tip, and cut grooves are formed at the positions where the pipe is divided into six equal parts. , a pen body having a structure in which this is brought forward has been disclosed.

Although the pen body proposed above is capable of writing at a variety of writing angles, it requires a complicated processing process and requires highly accurate placement of multiple cut grooves with a constant groove width at equally divided positions. It was difficult to set up the cutting tool, and the quality was uneven and the cutting tool was severely worn out, making productivity unsatisfactory.

The present invention has a cross-sectional structure in which the opposing inner walls of one end of the metal capillary are deformed protrudingly to a position near the axis, a capillary space is provided between the inner walls to form an ink outflow hole, and the rear part thereof is provided with a capillary space between the inner walls. proposes a pipe pen body in which the ink outlet hole is connected to the ink outlet hole for effectively discharging ink, thus solving the problems of the conventional pen body and achieving fine writing suitability and versatility as described at the beginning. The present invention provides a pipe pen body that satisfies the practicality of use.

(B) Structure of the Invention The drawings (FIGS. 1 to 11) of the present invention will be explained.

The pipe pen body 1 of the present invention has a cross section formed by pressing and deforming the opposing inner walls of one end of a thin metal tube 6 having a substantially uniform thickness over an appropriate length in the axial direction up to the vicinity of the axis. A capillary space that has a substantially constant width radially outward from the axis and extends in the axial direction.
is defined as an ink outflow hole 3, the tip of a thin tube where the ink outflow hole 3 opens is defined as a writing surface 4, and a metal thin tube 6 connected to the rear of the pressing deformation section 2 has an ink outlet communicating with the ink outflow hole 3. It is required that the hole 5 be provided inside.

In the above, the metal thin tube 6 can be specifically exemplified by metal materials such as stainless steel, titanium, copper and copper alloys, iron, tantalum, tungsten, and copal, and has a substantially uniform thickness selected from the range of 0.05 to 1.3 mm. One end of the thin metal tube 6 (the pressed thickness deformed portion 2) is effective.
In the cross section, the opposing surfaces are concentrated inward at a position near the axis, and capillary spaces that serve as ink outflow holes 3 are formed between the inner walls. The capillary space with the above configuration is
It is formed by squeezing at least two locations from the outside of substantially the same location in the axial direction of one end of the metal capillary tube 6 using a pressing tool having a predetermined shape.

The cross-sectional shape of the ink outflow hole 3 is shown in Figures 3 and 5.
7 and 9, the ink outflow hole 3 is surrounded by a wall with a substantially uniform thickness, the front end opening is used as a writing surface 4, and the rear part is an ink outlet hole 5.
It communicates with

Ink outlet hole 5 connected to the rear of the ink outlet hole 3
is a hole having a larger volume and less ink flow resistance than the ink outlet hole 3, and serves to introduce an appropriate amount of ink from the ink storage portion according to the writing speed and lead it out to the writing surface 4. The ink outlet hole 5
is installed inside the rear of the press-deformed portion 2 of the metal thin tube 6, but since the writing tip is formed by press-deformation processing of the metal thin tube 6, the undeformed hollow portion at the rear connected to this can be used as is. . In addition, in order to control the amount of ink flowing out, an appropriate ink guide wick 7 can be inserted into the ink outlet hole 5 (see Fig. 8). An ink passage 8 is formed between the ink outlet hole 5 by loosely inserting a linear body, a linear body with a through hole in its internal axis, a processed fiber body, etc., which itself has a capillary force. , a linear body having a circular, polygonal or other irregular cross section, a linear body provided with protrusions, and the like.

As illustrated in FIG. 8, it is effective for the writing surface 4 to have a tapered shape depending on the purpose;
It can be put to practical use by chamfering or polishing the paper-contacting portion. Furthermore, plating by known methods, welding of iridium alloys, osmium alloys, etc., and deposition of titanium nitride, chromium nitride, titanium carbide, chromium carbide, boron layers, etc., improve wear resistance, hardness, and writing. The taste etc. can be improved. FIG. 11 shows the pipe pen body 1 of the present invention.
is a longitudinal cross-sectional view of a main part showing an example of application of the pipe pen body 1 is held in a holder 9,
The rear end is connected to the ink storage member 10 for practical use.

(c) Functions and Effects of the Invention At the rear of the writing surface 4 having ink outflow holes 3 consisting of capillaries, an ink outlet hole 5 having a larger capacity and lower flow resistance than the outflow hole 3 is connected. ,
The outlet hole 5 introduces and temporarily stores a large amount of ink that cannot be introduced by only the capillary force of the ink outlet hole 3 from the ink storage section, and this ink is quickly written by the outlet hole 3 having a large capillary force. Side 4
will be introduced in As mentioned above, the writing tip and rear part of the pen body are configured differently, that is, the ink outflow hole 3 communicating with the writing surface 4 and the ink outlet hole 5 at the rear are configured differently, and the ink transport and derivation functions within the pen body are improved. These functions work together to provide a pipe pen body that has both ink flowability and durability.

Furthermore, the ink guide wick 7 inserted into the ink outlet hole 5 as necessary plays a role in controlling ink outflow, making it possible to apply a variety of inks and to distribute the appropriate amount of ink according to various writing conditions. Derive.

In addition to the effects of the above configuration, the present invention has the following advantages:
The writing surface 4 is formed of a thin metal wall with a substantially uniform thickness, which makes the most of the rigidity, durability, and dimensional stability of metal to balance uniform ink delivery and durability. Enables pen body design. To supplement this point, as illustrated in the drawing, one end of the metal thin tube 6 (the pressed thickness deformed part 2) is concentrated in the vicinity of the axis, and the cross section has a substantially constant width radially outward from the axis. It forms a capillary space, which serves as a skeleton and contributes to improving durability, and within the skeleton,
The writing surface 4 in which the capillaries are integrally formed can be configured freely, and the ink flows out from the capillaries between the thin metal walls forming the skeleton and uniformly wets the writing surface 4. This allows you to obtain uniform handwriting with no blurring.

Furthermore, the writing surface 4 can be produced with high efficiency by applying pressure from the outside of one end of the thin metal tube 6 at approximately the same location in the axial direction using a predetermined pressing tool.
Compared to the pen body, which has cutting grooves on the cutting tool,
Pen bodies with various capillary groove widths and shapes can be provided, and can be put to practical use in various fields where fine writing as described at the beginning is required.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the pipe pen body of the present invention, Fig. 2 is a longitudinal sectional view of the pen body of Fig.
4, 6, and 8 are longitudinal cross-sectional views of main parts of other embodiments, and FIGS. 5 and 7.
Figure 9 shows the BB line, C-C line, D-D
Each arrow view of the line, FIG. 10, is a sectional view taken along the line E-E. FIG. 11 is a longitudinal sectional view of the main part of the tip of a writing instrument equipped with the pipe pen body of the present invention. 1... Pipe pen body, 6... Metal thin tube, 2...
Pressure deformation part, 7... Ink guide core, 3... Ink outflow hole, 8... Ink passage, 4... Writing surface, 9...
...Holder, 5...Ink outlet hole, 10...Ink storage member.

Claims (1)

[Claims] 1 The opposing inner walls of one end of a thin metal thin tube 6 having a substantially uniform thickness are pressed and deformed over an appropriate length in the axial direction up to the vicinity of the axial center, and the cross section is radially outward from the axial center. The capillary space having a substantially constant width and extending in the axial direction is defined as an ink outflow hole 3, and the tip of the capillary opening of the ink outflow hole 3 is defined as a writing surface 4. A pipe pen body 1 in which an ink outlet hole 5 communicating with the ink outlet hole 3 is provided inside a metal thin tube 6 connected to the rear.