JPS623255Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to cartridge-type writing instruments such as felt-tip pens and ballpoint pens.

Cartridge-type writing instruments usually have a cartridge-type ink barrel connected to the neck of the writing instrument where the nib of a felt-tip pen, ballpoint pen, etc. is installed, and a barrel that is fitted onto the outside of the ink barrel is screwed or fitted to the neck of the writing instrument. . Therefore, assembly is complicated and costs are high.
Moreover, the ink cylinder had the drawbacks of a relatively small diameter due to its design, resulting in a small ink capacity and a short writing distance. This invention improves the above-mentioned drawbacks and will be explained in detail below with reference to the drawings.

FIG. 1 shows an embodiment of the felt-tip pen of the present invention, where A is the neck of the writing instrument, B is the connector, C is a cartridge type ink barrel, and D is the cap of the writing instrument.

The writing instrument neck A includes a pen nib 1 made of fiber or plastic, a small diameter cylinder part into which the pen nib 1 is loosely inserted, a large diameter cylinder part 4 in which an ink storage body 3 made of foamed polyurethane or felt is built-in, and a collar part. 5, a neck part 6 usually molded from thermoplastic resin, a valve seat 9 usually molded from an elastic thermoplastic synthetic resin such as polyethylene, a valve cylinder 8 hanging from the flange part 7, and a flange part 10 with a large diameter. A spring receiver 14 in which a portion 11, a bottom portion 12, and a small diameter portion 13 are connected, a valve body 17 with a valve portion 16 protruding from a valve rod 15, a spring 18, a shoulder portion 19, a stepped portion 20, and a threaded portion 21. The tube 22 is formed by staking a cylindrical body, usually made of aluminum, through a caulking process. Regarding the relationship between the respective parts, the valve body 17 is loosely inserted into the spring receiver 14 and is resiliently pushed by the spring 18 stretched between the bottom 12 of the receiver 14 and the valve portion 16, and the valve rod 15 is pushed forward. The valve part 16 is attached to the inner end of the pen nib 1, and the tip side is provided with the collar part 5 of the neck barrel and the collar part of the valve seat 9 between the shoulder part 19 and step part 20, which are in contact with the inner end of the valve barrel of the valve seat 9, respectively. The part 7 and the flange part 10 of the receiving tube 14 are made of aluminum and fixed by clamping.

The connector B has a large diameter part 25 connected to a small diameter part 24 having a screw 23 carved therein, and two semicylindrical bodies 2 each having an inner protruding edge protruding toward the center from the large diameter part 25.
In this figure, two semi-cylindrical bodies 26 and 27, which are injection molded from polypropylene resin, are connected via a thin hinge part 28 so as to be freely bendable. The connector does not need to be a series of semi-cylindrical bodies connected at a hinge part, or may be a plurality of cylindrical bodies each cut lengthwise from a cylindrical body.

The cartridge-type ink cylinder C consists of an opening 29 that fits into the small diameter part 13 of the receiver cylinder 14, a flange 30 that is engaged with the inner protruding edge of the connector B, and a main part 31 that accommodates ink 32. Usually molded by blow molding thermoplastic resin.

D is a cap that is fitted into the neck A of the writing instrument, and E is a cap that is fitted into the ink cylinder C before being attached to the writing instrument A.

To assemble a writing instrument from these parts, remove the cap E from the ink cylinder C shown in FIG.
After expanding 27, it touches the tip of the ink cylinder C,
After integrating the semi-cylindrical bodies 26 and 27 into one cylinder so that the upper surface of the flange 26 is in contact with the lower surface of the flange 30, the small diameter portion 24 of the connector B is connected to the writing instrument neck A.
is screwed into the threaded portion 21 of the tube 22, and the assembly is completed. At this time, the small diameter portion 13 of the receiving tube 14 has an opening 29.
or the inner surface of the bottom portion 12 of the receiver tube 14 and the end surface of the opening 29 are tightly fitted, so that the ink 32
It is necessary that evaporation of

It is not necessary to write in detail using this writing instrument, but remove the cap D, point the pen tip 1 downward, and apply pressure to the pen tip 1 with a force greater than the writing pressure.
When pressed, the pen tip slides inward and touches the valve body 17.
The valve opens and ink 3 in the ink cylinder C is pressed.
2 flows into the pen tip 1 and the ink storage body 3 and becomes ready for writing.

After the ink 32 in the ink cylinder C is consumed, the ink cylinder C can be replaced by reversing the assembly described above.

As mentioned above, this invention is an invention that can inexpensively supply a writing instrument that has a simple structure, is easy to assemble, can store a large amount of ink, and has a long writing distance.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view showing one embodiment of the writing instrument of the present invention, FIG. 2 is a perspective view showing a connector, and FIG. 3 is a perspective view showing an ink cylinder. A... Writing instrument neck, B... Connector, C... Ink cylinder.

Claims (1)

[Scope of utility model registration request] The writing instrument has a neck with a pen tip attached, a valve seat, a valve body on the tip side and a spring that permanently presses the valve body against the valve seat, and a small diameter part on the inner end side that fits into the opening of the ink cylinder. A pair of connectors in the shape of vertically cut cylinders are integrated and locked by a tube in which the three protruding spring receivers are clamped and integrated, and the inner protrusion at the lower end of the connector is integrated. A cartridge-type writing instrument characterized in that the neck of the writing instrument and the ink barrel are connected by a rim of the cartridge-type ink barrel being locked to a flange of an opening of the cartridge-type ink barrel.