JP2001130187A - Ballpoint pen with transparent holder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To give a new design to a ballpoint pen. SOLUTION: The holder 1 of the tip of a ballpoint pen is formed from a transparent synthetic resin. In addition to the holder of the tip, an ink storage tube 3, a forward metal, the whole or a part of an axial cylinder of a ballpoint pen are formed from a transparent synthetic resin. The holder 1 of the tip, an ink storage tube, a forward metal and axial cylinder, or the holder of the tip, an ink storage tube, a forward metal and axial cylinder of a ballpoint pen all are integrally formed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ballpoint pen in which at least a chip holder is transparent.

[0002]

2. Description of the Related Art In general, a ball-point pen has a chip including a ball and a holder for holding the ball at its tip and mounting an ink-containing tube, an ink-containing tube attached to communicate with the chip, and a tip for covering the chip. It consists of a shaft cylinder (usually integrated with the tip metal by screwing) that is placed over the gold and ink containing tubes to facilitate handling during writing work. As for the ballpoint pen, a transparent material is used for the shaft cylinder or the ink storage portion of the center cylinder, but stainless steel or brass has been used for the tip. This is thought to be due to the idea that mechanical properties such as abrasion resistance and bending strength that can withstand the force applied to the chip holder can only be obtained with metal, and we want to take advantage of the beautiful luster of stainless steel and brass It also responded to the demands.

[0003]

There is a demand for providing a ballpoint pen with a new design by making the tip portion transparent. In response to this, the present invention has been made to make the chip portion transparent.

[0004]

SUMMARY OF THE INVENTION The present invention relates to a ballpoint pen in which a holder of a chip is a transparent body made of a transparent synthetic resin. Furthermore, the present invention relates to a ball-point pen, which is a transparent body in which a part or the whole of an ink containing tube, a tip metal, and a barrel are formed of a transparent synthetic resin in addition to a chip holder portion. Further, the present invention provides a tip holder and an ink containing tube, a tip and a barrel, a tip holder and an ink containing tube and a tip, or a tip holder, an ink containing tube, a tip and a barrel. The present invention relates to the above-mentioned ball-point pen integrally formed with a lever.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, a holder portion is formed of a transparent synthetic resin to form a transparent body, whereby a novel design can be exhibited. By making the holder part transparent, and also making some or all of the ink storage tube, tip metal, and shaft cylinder transparent, it is possible to develop more diverse designs and make the holder part transparent. Value is increased. It is convenient for use because the remaining amount of ink is clear at a glance. Further, there is an advantage that the number of parts and points can be reduced for the manufacturing side.

In order to make each part of the ball-point pen transparent, the present invention uses a transparent synthetic resin as a constituent material. The transparent resin that can be used in the present invention is not particularly limited, and any synthetic resin may be used as long as it is transparent and has rigidity and hardness enough to withstand use. Although a thermoplastic resin is preferable from the viewpoint of moldability, a cross-linkable type which is cured by light or the like after molding may be used as long as molding is possible. Typical transparent synthetic resins that can be used include polymethyl methacrylate (PMMA), polycarbonate (PC), transparent polyamide (PAm), acrylonitrile / styrene copolymer resin (AS), polyacrylonitrile resin (PAN), and polyester (PEs). ), Polyvinyl chloride (PVC), methyl acrylate / butadiene / styrene copolymer resin (MBS), polyolefin-based transparent resin, and the like. More preferably wear resistance, sliding properties,
It is a synthetic resin having excellent chemical resistance, and examples thereof include a transparent polyamide resin and a polyacrylonitrile resin. These resins may be colored as long as the transparency is not impaired.

[0007] By using a synthetic resin for the holder, it is possible to easily insert the ball into the tip of the holder by using the elasticity or thermal deformability superior to the metal used as the material of the conventional holder. Benefits are obtained.

In order to mold the holder and other parts with a synthetic resin, it is preferable to use injection molding.
When molding each part using the same transparent resin, the tip holder and ink containing tube, tip and barrel, or the holder, ink containing tube, tip and barrel are all integrally molded. The productivity and quality stability can be significantly improved.

In the injection molding of the holder portion, a product can be formed by a general injection molding apparatus and method using a resin having good fluidity. However, in the case of a resin having low fluidity such as a transparent polyamide resin, the injection is completed. At the same time, that is, using an injection compression molding method in which the tip of the holder is moved with the cavity pin or core pin in the mold while the resin is still in the molten state, until the specified amount of compression is reached with the cavity pin or core pin Sometimes. For this movement, an ejector of a molding machine, a mold clamping pressure, a drive mechanism (hydraulic, pneumatic, solenoid, etc.) inside the mold, mechanical drive, a spring provided inside the mold, and the like can be used.

In the same manner as in a normal ball fixing method, a ball is formed on a holder formed by injection molding by a snap-in method in which a protrusion is provided on the holder from the time of molding or by a heat caulking method in which the ball is crimped around the ball while heating. It can be introduced into a chip. Further, both methods may be combined.

Hereinafter, the present invention will be further described with reference to examples. Example 1 Using a four-cavity mold and a 30-ton injection molding machine, transparent nylon (trade name "Trogamide", manufactured by Daicel Huls)
Was injection molded to form a transparent tip holder (1) for ballpoint pens (having a snap-in projection). A ball made of stainless steel having a diameter of 0.7 mm (2) was introduced into the holder (1) by a snap-in method to obtain a chip. A conventional polyethylene ink containing tube (3) separately prepared was attached to this chip to prepare a hollow (6) (FIG. 1). The tip of the ballpoint pen using this shin was transparent and had a beautiful appearance, and the remaining amount of ink could be clearly shown. JIS S-
When a durability test was performed in accordance with 6039, it could be used up to 1000 m and sufficiently satisfied the standard value.

Example 2 Using the same transparent resin as in Example 1, the holder and the ink containing tube were integrally formed by injection molding, that is, the entire inner lining was integrally formed (FIG. 2).

Example 3 Using the same transparent resin as in Example 1, a barrel of a ballpoint pen and a tip were integrally formed by injection molding. A ballpoint pen was obtained by combining the shins manufactured in Example 2 with this. The ballpoint pens were all transparent, glossy and beautiful except for the metal ball, and always showed a clear ink level. When an aqueous ink was used as the ink, the color of the ink could be clearly identified from the outside, and the ink was beautiful and convenient to use.

Example 4 A ballpoint pen was obtained in the same manner as in Example 1 except that a polyolefin-based transparent resin (trade name "Apel", manufactured by Mitsui Chemicals, Inc.) was used instead of the transparent nylon as the transparent resin. The durability of this ballpoint pen was 1000 m, which was well within the standard.

Example 5 Using the transparent resin used in Example 4, a holder, an ink containing tube and a tip were integrally injection-molded (FIG. 3). A transparent ballpoint pen was obtained by attaching a steel ball to the tip of the holder by a snap-in method.

Example 6 Using the transparent resin used in Example 4, a holder, an ink containing tube, a tip metal and a shaft cylinder were integrally injection-molded (FIG. 4). A transparent ballpoint pen was obtained by attaching a steel ball to the tip of the holder by a snap-in method.

[0017]

The ball-point pen of the present invention, in which a part or the whole of the ink storage tube, the tip metal and the shaft cylinder is made transparent in addition to the holder and the holder, has an unprecedented design property. Can be grasped from the outside from the outside. When the water-based ink is filled, the color can be seen from the outside, and the effect of further improving the design can be obtained.

[Brief description of the drawings]

FIG. 1 is a longitudinal cross-sectional view of a center lining including a central axis of a holder portion obtained by injection molding using a transparent synthetic resin.

FIG. 2 is a longitudinal cross-sectional view of a shin including a central axis of a transparent molded body in which a holder and an ink containing tube are integrated by injection molding using a transparent synthetic resin.

FIG. 3 is a longitudinal cross-sectional view of a center lining including a central axis of a transparent molded body in which a holder, an ink containing tube, and a tip are integrated by injection molding using a transparent synthetic resin.

FIG. 4 is a vertical cross-sectional view of a ball-point pen (before ball insertion) including a central shaft in which a holder, an ink storage tube, a tip metal, and a barrel are integrally formed.

[Explanation of symbols]

1: Holder, 2: Ball, 3: Ink containing tube, 4: Integral molded product of holder and ink containing tube, 5: Integral molded product of holder, ink containing tube and tip, 6: Nakashin, 7: Tip 8: Shaft tube.

Claims (7)

[Claims] 1. A ball-point pen in which a holder portion of a chip is a transparent body formed of a transparent synthetic resin. 2. The ballpoint pen according to claim 1, wherein a part of or the whole of the ink containing tube, the tip metal, and the barrel is a transparent body made of a transparent synthetic resin. 3. The ballpoint pen according to claim 2, wherein the holder portion of the chip and the ink containing tube are formed integrally. 4. The ballpoint pen according to claim 2, wherein the barrel and the tip are integrally formed. 5. The ballpoint pen according to claim 2, wherein the tip holder, the tip metal and the ink containing tube are integrally formed. 6. The ballpoint pen according to claim 2, wherein the tip holder, the ink containing tube, the barrel, and the tip are integrally formed. 7. A transparent synthetic resin comprising polymethyl methacrylate (PMMA), polycarbonate (PC), transparent polyamide (PAm), acrylonitrile / styrene copolymer resin (AS), polyacrylonitrile resin (PAN), polyester (PEs), Polyvinyl chloride (PVC), methyl acrylate / butadiene / styrene copolymer resin (M
The ballpoint pen according to any one of claims 1 to 5, wherein the ballpoint pen is selected from BS) and a polyolefin-based transparent resin.