JPH0541915Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention has a structure in which a synthetic resin pen nib having a longitudinal through hole as an ink passage is attached to a tip holder, and the rear end of the tip holder is attached to a tip holder. This invention relates to a mounting structure for a synthetic resin nib that is deformed by pressure and bit into the outer peripheral wall of the nib.

(Prior art and its problems) The above-mentioned type of mounting structure is currently one of the basic mounting structures, along with the type that is fixed with adhesive. It is known that the material undergoes pressure deformation in a ring shape over the entire circumference, or in an appropriate number of points or lines, and its advantages include:
When inserting the rear end of the pen tip into the ink relay member or ink storage member, the rear end of the pen tip may not be bent and inserted, resulting in poor contact and problems in ink delivery such as ink fading. It has a certain point that it will not come.

However, this type of pressure deformation is
No particular problem will occur if the diameter of the inner hole of the tip holder into which the pen tip is inserted matches the outer diameter of the nib, but in reality, the inner diameter of the tip holder and the outer diameter of the nib are For this reason, if the inner diameter of the tip holder's inner hole is larger than the outer diameter of the pen tip, lateral vibration or unpleasant vibrations will occur in the front part of the pen tip when writing, making it difficult to obtain a smooth writing feeling. If the diameter of the inner hole of the holder is smaller than the outer diameter of the pen tip, it becomes impossible to insert and attach the pen tip, which is undesirable.

(Means for Solving the Problems) Therefore, the present invention makes full use of the advantages of the means of attaching the pen tip by pressing and deforming the rear end of the tip holder, and also eliminates the variation in design dimensions that occur between the tip holder and the pen tip. The purpose of this design is to provide a mounting structure for a synthetic resin nib that is excellent in practical use and eliminates as much as possible the unpleasant writing sensations caused by horizontal vibration at the front of the nib, and its gist is as follows: In a structure in which a synthetic resin nib having a longitudinal through hole as an ink passage is attached to a tip holder, the rear end of the tip holder is pressed and deformed to bite into the outer peripheral wall of the nib. A synthetic resin characterized by having a clearance between the outer circumference of the pen nib and the inner hole of the tip holder, and having an inward protrusion provided at the front end of the tip holder so as to abut point or linear contact with the outer peripheral wall of the nib. It has a mounting structure for a made nib.

(Function) Based on the above-mentioned gist of the present invention, when inserting the rear end of the pen tip into an ink relay member or an ink storage member, the rear end of the pen tip is inserted with a bend, which results in poor ink extraction performance. There is no problem, and the pen tip itself is supported at two points in the longitudinal direction, that is, it is supported at the front and fixed at the rear, so it is reliable and good. You can expect a comfortable writing feeling, and the fact that there is a clearance between the inner hole of the tip holder and the outer circumference of the nib means that the inner diameter of the tip holder is sufficiently larger than the outer diameter of the nib. west,
An inward protrusion is formed at the front end of the tip holder to match the outer diameter of the pen tip. Therefore, even if there is variation in design dimensions between the two, this can be absorbed. From the above, it is possible to provide a mounting structure for a synthetic resin pen nib that has a number of advantages.

(Example) Hereinafter, the present invention will be explained in detail based on the accompanying drawings.

In FIGS. 1 to 3, reference numeral 1 is made of polyacetal, polyimide, polyester, etc., and a through hole in the longitudinal direction of the cross section is appropriately connected to an ink passage 2.
This is the nib of the pen. By the way, this kind of pen nib 1
are generally manufactured by extrusion molding methods such as monofilament self-fusion methods, including those having ink passage elements other than through holes. Further, reference numeral 3 designates a tip holder made of stainless steel, brass, etc. and subjected to surface treatment such as plating as necessary, and the pen tip 1 is inserted into the inner hole 4 at the center. Here, a clearance 5 is provided between the inner hole 4 and the pen tip 1 in the longitudinal direction, so that the rear end of the tip holder 3 can be pressed and deformed from the outside to open the pen tip. The pen tip 1 is fixed by biting the protrusion 6 into the outer circumferential wall of the tip holder 1. On the other hand, the front end of the tip holder 3 is provided with an appropriate number of dots or lines extending around the circumference from the outside. The pen tip 1 is supported by forming an inward protrusion 7 so that its tip substantially contacts the outer circumferential wall of the pen tip 1 by pressing deformation (circumferential in the figure). Therefore, in the present invention, considering the deformation of the rear end portion of the tip holder 3 under pressure, it is desirable to provide the projection 6, which is a thin wall portion, in advance as shown in the above embodiment.

In this embodiment employing the above configuration, a clearance 5 is provided in advance between the inner hole 4 of the tip holder 3 and the pen tip 1, so that even if there is an error in design dimensions between the two members, this can be avoided. The pen tip 1 can be expected to be firmly fixed and stably inserted into the ink storage member (not shown) by the press deformation at the rear end of the tip holder 3, and the front end of the tip holder 3 can be expected to When writing, the pen tip 1 should swing in the horizontal direction due to the presence of the clearance 5, but since the inner protrusion 7 is provided so as to substantially contact the outer circumferential wall of the pen tip 1, this can be suppressed as much as possible. From the above, the intended purpose can be achieved.

It should be noted that, as an embodiment of the present invention, in addition to the embodiment shown in the above embodiment, the tip holder 3 may be constructed of two members, a front member 3a and a rear member 3b, as shown in FIG. As for the shape of the pen nib itself, various shapes can be adopted, such as one having a rectangular cross section, and one having a stepped portion in its longitudinal cross section.

(Effect of the invention) Since the invention has the above-described structure, when inserting the rear part of the pen tip into the ink storage member, etc.
As a result of preventing the pen tip from bending as much as possible, not only can you expect good ink flow, but you can also prevent the pen tip from swinging sideways and causing unpleasant vibrations when writing as much as possible, and it also has a tip holder. It also solves the production technology problem of the impossibility of assembling the pen nib, which occurs due to variations in the inner hole and the outer diameter of the nib.
It has many practical advantages.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; Fig. 1 is a vertical sectional view of the main part of the pen nib mounting structure, Fig. 2 is an enlarged view of section A in Fig. 1, and Fig. 3 is an enlarged view of section B in Fig. 1. The enlarged view, FIG. 4, is a vertical sectional view of a main part of a pen nib mounting structure showing another embodiment. 1...Pen tip, 2...Ink passage, 3...Tip holder, 4...Inner hole, 5...Clearance,
6...Protrusion, 7...Internal protrusion.

Claims (1)

[Scope of utility model registration request] In a structure in which a synthetic resin nib having a longitudinal through hole as an ink passage is attached to a tip holder, the rear end of the tip holder is pressed and deformed to bite into the outer peripheral wall of the nib; A synthetic resin characterized by having a clearance between the outer periphery of the nib and the inner hole of the tip holder, and having an inward protrusion provided at the front end of the tip holder so as to be in point or linear contact with the outer peripheral wall of the nib. Mounting structure of the made nib.