JPS6144860Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to a ballpoint pen refill that is convenient to use and prevents it from falling off when replacing the refill on a metal office desk or inside a car.

Conventional technology As shown in FIG.
A magnetic piece 22 that responds to magnetism is attached to the rear end of the
Furthermore, the inside of the writing instrument body 2 accommodates the ink storage tube 21.
3 is provided with a magnetic metal ring 24, and when the magnetic metal ring 24 is removed from the inside 23 of the writing instrument barrel, the magnetic piece 22 is pulled by the magnetic metal ring, so that the ink storage tube 21 can be easily pulled out from the inside 23 of the writing instrument barrel. (see Japanese Utility Model Publication No. 52-70036) and the writing instrument body 25 as shown in FIG.
It is known that a writing instrument body 25 is prevented from rolling by providing a wide groove 26 and wrapping a magnetic plate 27 around it (see Japanese Utility Model Publication No. 164927/1983).

Problems to be Solved by the Invention However, since the magnetic metal ring 24 is not directly attached to the ink storage tube 21 in the one shown in FIG. It is not possible to prevent the tube 21 from rolling, and the one shown in FIG. 6 uses a wound magnet plate 27 to prevent the writing instrument body 25 from rolling. The purpose is completely different from that of preventing
Furthermore, the structure for preventing rolling is completely different from the ballpoint pen core of this invention, and conventional ballpoint pen cores do not have any means to prevent rolling, making them inconvenient to use. There was a fear that This invention solves the above-mentioned problems, and aims to provide a convenient ballpoint pen core that can prevent rolling and ink leakage with a simple structure.

Means for solving the problem In order to achieve the above purpose, the structure of this invention is as follows.
A core shaft 2 that can be freely inserted and removed from the shaft body 1 is provided, and the core shaft 2 includes a hard cylinder 7 having a ballpoint pen tip 3 at the tip 11, and a transparent and slightly soft resin cylinder 8 connected to the hard cylinder 7. In addition, an ink storage chamber 6 is provided in the core shaft 2 extending from the hard cylinder 7 to the resin cylinder 8, and an ink storage chamber 6 is formed in the ink storage chamber 6 from the rear end opening 4 of the ink storage chamber 6 that stores ink 9. 6, and the diameter of the tip of the tip insertion portion 10 of the magnet column 5 is smaller than the diameter of the rear end opening 4. be.

Function This device allows writing via the ballpoint pen tip 3 provided at the tip 11 of the lead shaft 2 inserted into the shaft body 1, and the lead shaft 2 is made of a hard tube 7 equipped with a ballpoint pen tip and a transparent and slightly soft material. The ink 9 is stored in the ink storage chamber 6 through the rear end opening 4 of the ink storage chamber 6, and a magnet column in the ink storage chamber 6 is fitted to prevent ink from leaking. The magnetic column 5 magnetically attaches to a metal surface such as a metal desk to prevent the core shaft 2 from rolling.
When the ink 9 inside runs out and writing becomes impossible, the core shaft 2 is pulled out from the shaft body 1 and a new core shaft 2 is replaced.

Embodiment An embodiment of this invention will be described below with reference to the drawings. Reference numeral 1 denotes a shaft body, and a core shaft 2 that can be freely inserted and removed is provided in the shaft body 1, and the core shaft 2 has a ballpoint pen nib 3 at its tip 11. A transparent and slightly soft resin cylinder 8 is formed in series with the hard cylinder 7, and an ink storage chamber 6 is provided in the core shaft 2 extending from the hard cylinder 7 to the resin cylinder 8. A magnet column 5 having a diameter slightly larger than the diameter of the ink storage chamber 6 is inserted into the ink storage chamber 6 from the rear end opening 4 of the ink storage chamber 6 in which the ink storage chamber 9 is stored.
The diameter of the tip is smaller than the diameter of the rear end opening 4.

Effects of the invention This invention has the above-mentioned configuration, and the ballpoint pen nib 3 is provided at the tip of the lead shaft 2 which can be inserted into and removed from the shaft body 1, allowing writing to be performed through the ballpoint pen nib 3. At the same time, the magnetic column 5 is inserted into the ink storage chamber 6 from the rear end opening 4, so when replacing the ballpoint pen core by placing it on a metal office desk or on the mounting surface of a metal window frame in a car, the magnetic column 5
The ballpoint pen tip 3 is magnetically attached and prevented from rolling and falling off, thereby preventing damage to the ballpoint pen tip 3 and making it convenient to use.

In addition, a transparent resin cylinder 8 is used to display the color of the stored ink 9.
Since the ballpoint pen core containing ink 9 of a desired color can be attached to the shaft body 1 and used for writing, the core shaft 2 is equipped with a hard tube 7. An ink storage chamber 6 is provided over the resin cylinder 8, and a magnet column 5 having a diameter slightly larger than the diameter of the ink storage chamber 6 is inserted into the ink storage chamber 6 from the rear end opening 4 of the ink storage chamber 6 in which ink 9 is stored. By fitting the magnetic column 5 into the ink storage chamber 6, the leakage of the ink 9 can be prevented by the magnetic column 5 which prevents rolling.
This allows for reliable occlusion by adhering closely to the area. Also, by making the diameter of the tip of the tip insertion portion 10 of the magnet column 5 smaller than the diameter of the rear end port 4, when inserting the magnet column 5 into the ink storage chamber 6 from the rear end port 4, the tip insertion portion 10 can be It can be easily inserted from the rear end opening 4, and the insertion work can be performed easily and quickly.
It can be operated in large quantities by one worker, reducing labor costs.

Therefore, the structure is extremely simple, and it is possible to prevent the ballpoint pen core from rolling and to prevent ink 9 from leaking.
It has many practical effects, such as being suitable for mass production and being available at low cost.

[Brief explanation of drawings]

Figure 1 is a perspective view, Figure 2 is a sectional view of the main parts, Figure 3
The figure is an exploded sectional view of the main parts, FIG. 4 is a partially cutaway perspective view showing the state of use, and FIGS. 5 and 6 are explanatory views of the conventional product. 1... Shaft body, 2... Core shaft, 3... Ballpoint pen tip, 4... Rear end opening, 5... Magnet column, 6... Ink storage chamber, 7... Hard tube, 8... Resin tube, 9 ...Ink, 10...Tip insertion part, 11...Tip part.

Claims (1)

[Scope of utility model registration request] A shaft body 1 is provided with a core shaft 2 that can be freely inserted and removed, and the core shaft 2 includes a hard cylinder 7 having a ballpoint pen tip 3 at the tip 11, and a transparent and slightly soft resin cylinder 8 in the hard cylinder 7.
The core shaft 2 is provided with an ink storage chamber 6 extending from the hard cylinder 7 to the resin cylinder 8, and an ink storage chamber 6 containing ink 9 is inserted into the ink storage chamber 6 from the rear end opening 4 of the ink storage chamber 6. The magnetic column 5 is fitted with a diameter slightly larger than that of the ink storage chamber 6, and the diameter of the tip of the tip insertion portion 10 of the magnet column 5 is smaller than the diameter of the rear end opening 4. Ballpoint pen core.