JPH0357511Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to writing instruments, and increases the outflow of ink sent from the ink introduction core to the beak-shaped nib, and also increases the flow of ink even after the nib is held upward for a long time. This invention relates to a writing instrument that allows immediate writing.

[Prior art and its problems]

The applicant has developed an inexpensive disposable writing instrument that looks similar to a fountain pen at first glance, provides a solid writing feel, and has an ink absorber inside the barrel like a felt pen, so it can be used immediately after purchase. In Application No. 140542 of 1982, the tip of an ink introduction wick connected to an ink storage body is fitted into an ink introduction wick holder that holds the tip of the ink introduction wick so as to cover the beak-shaped pen tip, and the ink from the ink storage body passes through the ink introduction wick. We are proposing a writing instrument that is supplied with a pen tip.

The present invention relates to an improvement of the writing instrument disclosed in the above-mentioned utility model registration application. That is, in the embodiment of the writing instrument disclosed in the above-mentioned utility model registration application, a minute recess exhibiting a capillary phenomenon is formed on the front end surface of the groove for receiving the ink introduction wick of the ink introduction wick holder, and the recess is The ink is guided from the ink introduction core to the nib by capillary action, but later experience has shown that the capillary action in the recesses is not sufficient and the amount of ink supplied to the nib is insufficient, resulting in blurred writing when writing. It turns out that there is. Additionally, if you hold the writing instrument in your chest pocket for a long time with the nib facing upward, the ink supplied to the writing end of the nib will fall toward the ink introduction core due to gravity (hereinafter referred to as
This phenomenon is called ink drop), and it has been found that there is a drawback in that it is not possible to write immediately when the ink is taken out of the breast pocket and used.

[Purpose of invention]

Therefore, the purpose of the present invention is to solve the problems of the technology described in the above application, to increase the outflow of ink sent from the ink introduction core to the nib, and to constantly supply ink to the writing end of the nib. To provide a writing utensil which prevents ink drops and allows smooth writing at any time.

[Summary of the idea]

In order to achieve the above object, the present invention inserts an ink absorber into the barrel, provides a hollow nib holder at the tip of the barrel, and fits an ink introduction wick holder into the hollow interior of the nib holder. A concave groove is formed on the outer surface of the ink introduction wick holder in the direction of its longitudinal axis, and an ink introduction wick whose rear end is inserted into the ink storage body is inserted into this groove to cover the ink introduction wick. In a writing instrument equipped with a beak-shaped nib, the ink is supplied from the ink absorber to the nib by capillary action of the ink introduction core, and the tip of the ink introduction core is formed into a thin beak shape. At the same time, its tip protrudes from the ink introduction wick holder, and this protruding ink introduction wick tip is formed at the tip of the pen tip.
The writing end is made of a pair of opposing projecting pieces that are in contact with each other.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the writing instrument according to the present invention will be described below with reference to FIGS. 1 to 6.

The writing instrument of the present invention has a shape as shown in FIG. 4, for example, and consists of a main body 1 and a cap 2. An ink storage body (not shown) impregnated with ink is inserted into the shaft cylinder 3, and ink is supplied to the pen tip 5 from this ink storage body.

As shown in FIG. 1, a pen nib holder 4 is attached to the tip of the barrel 3 by fitting.
A hollow hole 6 with a semicircular cross section is formed in this pen nib holder 4, and an ink introduction lead holder 7 is fitted into this hollow hole 6. Ink introduction wick holder 7
As shown in FIG. 3, the plastic member has a semicircular cross section with a beak-like tip, and is formed to fit into the hollow hole 6. Further, a groove 8 is formed in the upper surface of the ink introduction core holder 7 in the longitudinal axis direction, and the groove 8 is formed to become gradually shallower at the tip. An ink introduction wick 9 having a thin beak-shaped tip is inserted into the groove 8, and a tip 9a of the ink introduction wick projects from the groove 8. The ink introduction core 9 is formed of a bundle of countless fibers, and guides ink from the ink storage body to the pen tip by capillary action. Further, an air groove 10 is formed in the bottom surface of the ink introduction wick holder 7 in the longitudinal direction.

Further, a recessed surface 11 is formed on the outer circumferential upper surface of the ink introduction wick holder 7, and a pen nib 5 is attached to this recessed surface 11 so as to cover the ink introduction wick 9 as shown in FIG. The attached pen tip 5 is flush with the outer peripheral surface of the ink introduction core holder 7. The pen nib 5 is made of metal and has a beak shape like that used in a fountain pen, and has a writing end 5a formed at the tip, and a slit 5b extending from the writing end 5a toward the base end of the pen nib. A subsequent small hole 5c for preventing cracking is formed. Further, as shown in FIG. 2, the writing end 5a is formed into a V-shaped cross section in which the distal ends are rubbed together and the base end is slightly open. The tip 9a of the ink introduction wick protruding from the ink introduction wick holder is slightly inserted so as to touch the inner surface of the writing end. As a result, a slight air space is formed between the tip of the ink introducing wick and the inner surface of the writing end.

Furthermore, as shown in FIG. 5, the pen nib 5 is obtained by pressing a flat plate 5' made of stainless steel, for example, punched in the shape of a pen nib. A pair of protrusions 5a' that serve as the writing end 5a of the pen tip are integrally formed at the tip of the flat plate 5', and a slit 5b and a crack-preventing small hole 5c are formed at the tip of the flat plate 5'. After forming, a flat plate 5' is press-molded so as to be in close contact with the recessed surface 11 of the ink introduction core holder 7, and at the same time as this press-forming, the protruding pieces 5a' are bent so as to face each other. A beak-shaped pen nib 5 having a writing end 5a integrally formed as shown in the figure is obtained. Incidentally, upon this bending, a slight gap is left between the proximal ends of the projecting pieces 5a'.

Next, the operation of the writing instrument configured as described above will be explained.

During writing, the ink impregnated into the ink storage body is sent toward the tip 9a of the ink introduction wick 9 by capillary action. As shown in FIG. 2, this ink introduction lead tip 9a is inserted into the proximal open end of the writing end 5a formed integrally with the pen nib 5 so that the tip 9a touches the inner surface of the writing end. Therefore, the ink sent to the ink introduction core tip 9a is guided to the tip of the writing end 5a along the slit 5b formed in the pen tip. Further, some of the ink is guided from the ink introduction core tip 9a to the tip of the writing end 5a along the inner surface of the writing end. Furthermore, the space formed between the inner surface of the writing end 5a and the ink introduction core tip 9a functions as an ink storage section, and the ink supplied from the ink introduction core to the pen tip is stored therein. And when ink is consumed by writing,
The same amount of ink is supplied from the ink introducing core 9 to the writing end 5a.

In the above embodiment, the writing end of the pen nib is bent so as to leave a slight gap between the base ends, and the ink introduction lead tip is inserted into the open end on the base end. However, the same effect can be obtained by bending the writing end of the pen nib so that there is almost no gap between the base ends and by bringing the tip of the ink introduction lead into contact with the base end of the writing end. can play.

[Effect of idea]

As is clear from the above description, according to the present invention, the writing end of the pen nib is constructed by bending a pair of protrusions integrally formed with the pen nib so as to face each other. Since the tip of the ink introduction core is inserted into the base end of the ink absorber so that it touches the inner surface of the writing end, the ink inside the ink storage body is continuously sent from the ink introduction core to the writing end, and the ink is not interrupted. There isn't. In addition, the ink sent to the writing end of the pen nib is sent along the slit formed in the nib and along the inner surface of the writing end, so the amount of ink flowing out to the nib is smaller than before. This increases the number of characters and prevents blurring when writing. Furthermore, since the writing end is always in contact with the ink introduction core, ink drops do not occur, and even after holding the pen tip upward for a long time, you can immediately write smoothly, etc., and various other effects can be obtained. be able to.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view of the tip of the writing instrument according to the present invention, FIG. 2 is a plan sectional view of the tip of the writing instrument,
Fig. 3 is a perspective view of the tip of the writing instrument, Fig. 4 is a partially sectional side view of the writing instrument, Fig. 5 is a perspective view showing the pen tip of the writing instrument before processing, and Fig. 6 is processing of the writing instrument. It is a perspective view showing the rear pen tip. 3...Axis barrel, 4...Nib holder, 5...Nib, 5a...Writing end, 5b...Slit, 5c
...Small hole for preventing cracking, 6...Hollow hole, 7...Ink introduction wick holder, 8...Concave groove, 9...Ink introduction wick, 9a...Ink introduction wick tip, 10...Air groove, 11 ...concave surface.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. An ink storage body is inserted into the barrel, a hollow nib holder is provided at the tip of the barrel, an ink introduction wick holder is fitted into the hollow interior of the nib holder, A concave groove is formed on the outer surface of this ink introduction wick holder in the longitudinal axis direction, and an ink introduction wick whose rear end is inserted into the ink storage body is inserted into this concave groove so as to cover this ink introduction wick. In a writing instrument equipped with a beak-shaped nib, ink is supplied from the ink absorber to the nib by capillary action of the ink introduction core, the tip of the ink introduction core is formed into a thin beak shape, and The tip of the ink introduction core protrudes from the ink introduction wick holder, and the protruding tip of the ink introduction core is in contact with a writing end formed of a pair of opposing protrusions formed at the tip of the nib. Characteristic writing instruments. 2. The writing end of the pen nib is formed by bending a pair of protrusions integrally formed with the nib so as to face each other, as set forth in claim 1 of the utility model registration claim. writing utensils. 3 The above-mentioned bending of the writing end creates a cross section V in which the tips are rubbed together and the base end is slightly open.
The writing instrument according to claim 2 of the utility model registration claim, characterized in that it is shaped like a letter. 4. Any one of claims 1 to 3 of the utility model registration claim, characterized in that the ink introduction wick tip is inserted into the proximal open end of the writing end so as to touch the inner surface of the writing end. Writing implements listed in.