JP2555675Y2 - Writing implement - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a raw ink type writing instrument in which an ink tank is directly filled with ink.

[0002]

2. Description of the Related Art In a raw ink type writing instrument in which ink is directly filled in an ink tank without using an ink occluding body made of ultrafine fibers, for example, the ink discharged at the time of writing is replaced with air and at the same time, the dripping prevention is performed. A pen core having a function is used. In the case of using high-viscosity ink such as correction fluid, a valve mechanism is arranged behind the pen body, and when the pen body is pressed against the writing surface, the valve mechanism opens and ink is ejected. There are many things.

[0003]

However, the structure of the above-mentioned pen core is complicated because it is necessary to form an ink groove and an air groove, and also an ink storage section composed of a large number of comb teeth. There is a problem that requires time for manufacturing. Also, the valve mechanism has a problem that the structure is complicated due to the large number of parts.

[0004] Therefore, an object of the present invention is to provide a raw ink type writing implement having a small number of parts and a simple structure.

[0005]

In order to achieve the above object, a writing instrument according to the present invention comprises an ink tank directly filled with ink, a tip fixed to the tip of the ink tank and having an opening at the tip, and a step portion. The small diameter portion of the tip formed through the tip protrudes from the tip opening of the tip, from the base end
A vertical ink groove is formed on the outer peripheral surface of the cartridge.
Composed of rich pen body sex, when not in use the step portion of the pen body closes the distal opening of the tip, nib tip deflection abuts the small diameter portion in the radial direction to the writing surface during use Then the ink
The tip of the groove faces the tip opening of the chip so that the ink is ejected.

[0006]

When not in use, no ink is ejected because the step of the pen block the tip opening of the tip, but the base end of the pen is fixed in the tip and the small diameter portion at the tip swings. If the tip of the pen tip comes into contact with the writing surface during use , the pen body with high elasticity is displaced and the tip of the ink groove is
The tip opening of the tip is opened, and the blockage of the tip opening of the tip by the step of the pen body is released, so that the ink is discharged and writing can be performed.
Therefore, a pen core and a valve mechanism are not required, and a raw ink type writing instrument having an extremely simple structure can be obtained.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to the embodiments shown in the drawings. In FIG. 1, an ink tank 1 also serving as a shaft cylinder is directly filled with a relatively high-viscosity ink (not shown). If an extremely high-viscosity ink such as a correction liquid is to be filled, the ink tank 1 is formed of a highly flexible material. Then, when pressed by a fingertip, the ink is deformed so that the inside is pressurized, and the ink is ejected at the pressure. A tip 2 is fixed to the tip of the ink tank 1. The chip 2 is a cylindrical body with a bottom, and has a front end opening 21 formed on the front surface.

The pen body 3 is formed of a synthetic resin having high elasticity, and the base end portion 31 is pressed against the inner peripheral surface of the chip 2.
It is fixed at the caulking part 22. The pen body 3 has a base end 31
The tip of the pen body 3 has a small-diameter portion 33 formed at the tip of the pen body 3 through a step portion 32, although the front portion of the tip has a slightly smaller diameter and a gap is formed between the inner peripheral surfaces of the tip 2. Then, while the small diameter portion 33 protrudes from the distal end opening 21,
The step 32 presses against the front surface of the chip 3 to close the tip opening 21. Therefore, it is possible to prevent the ink from being discharged in a natural state without using a pen core or a valve mechanism. As shown in FIG. 2, a vertical ink groove 34 is formed on the outer peripheral surface of the pen body 3 in the chip 2.

Here, the outer diameter of the small diameter portion 33 which is the pen tip is smaller than the inner diameter of the tip opening 21. In addition, the base end 31 is fixed inside the tip 2 and the front end of the base end 31 has a slightly smaller diameter to form a gap between the inner peripheral surfaces of the tip 2. The small-diameter portion 33 can be deviated so as to swing around the end 31, and can be deviated within the range of the tip opening 21. And the small diameter part
When the tip 33 is displaced and comes into contact with the periphery of the tip opening 21, the tip of the ink groove 34 faces the tip opening 21.
That is, the closing of the tip opening 21 by the step portion 32 of the pen body 3 is released.

When the small-diameter portion 33, which is the pen tip, is written in contact with the paper surface P as shown in FIG. 3, the pen body 3 swings due to the sliding resistance between the small-diameter portion 33 and the paper surface P. displaced to the small diameter portion 33 comes into contact with the peripheral edge of the distal opening 21. Therefore, the leading end of the ink groove 34 faces the leading end opening 21, and the ink is ejected along the small diameter portion 33 and writing can be performed.
When the small diameter portion 33 is separated from the paper surface P, the pen body 3 is restored to the state shown in FIG.
Closes the tip opening 21 so that ink is not ejected.

[0011]

As described above, in the writing instrument of the present invention, the small diameter portion formed at the tip of the pen body through the step protrudes from the tip opening of the tip, and the base end is fixed in the tip. has been a deflectable as the small-diameter portion of the tip is rocking, when not in use is closed the distal end opening step portion of the chip of the pen body, deviated contact tip of the pen tip on the writing surface during use Then, the tip of the ink groove formed on the outer peripheral surface of the pen
Since the tip opening of the tip is approached and the blockage of the tip opening of the tip by the step of the pen body is released, ink is ejected, and the pen body plays a role of a pen core and a valve mechanism. Accordingly, a pen core, a valve mechanism, and the like are not required, and a raw ink type writing instrument having an extremely simple structure can be provided.

[Brief description of the drawings]

FIG. 1 is a sectional view of an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is an explanatory diagram of a use state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ink tank 2 Tip 21 Tip opening 3 Tip pen 31 Base end of pen 32 Step of pen 33 Small diameter of pen 34 Ink groove P Paper surface

Claims (1)

(57) [Scope of request for utility model registration] 1. An ink tank directly filled with ink, a tip fixed to the tip of the ink tank and having a tip opening, and a small-diameter portion at the tip formed through a step protrudes from the tip opening of the tip. Outer peripheral surface from base end to step
A vertical ink groove is formed on the tip , the base end is fixed inside the chip, and the small diameter part at the tip is rich in elasticity that can be deviated in the radial direction.
When not in use, the steps of the pen block the tip opening of the tip,
When using, the tip of the pen tip contacts the writing surface and the small diameter part is
The tip of the ink groove to the tip opening of the tip
Faces, writing instrument, wherein the ink is ejected.