JPH0632083U - Writing instrument - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a raw ink type writing instrument with a small number of parts and a simple structure. [Structure] A small-diameter portion 33 formed at a tip portion of a pen body 3 via a step portion 32 protrudes from a tip opening 21 of a tip 2, and a base end portion 31 is fixed in the tip 2 to form a small-diameter portion at the tip.
33 can be deformed so that it swings.
2 closes the tip opening 21, and when the tip of the pen body 3 comes into contact with the writing surface and swings when used, the tip opening by the step 32 is formed.
Make sure that block 21 is released and ink is ejected.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a raw ink type writing instrument in which ink is directly filled in an ink tank.

[0002]

[Prior art]

 In the case of a raw ink type writing instrument in which ink is directly filled in an ink tank without using an ink absorber made of ultrafine fibers, for example, a pen that replaces the ink discharged during writing with the air and has a function to prevent fluffing Wick is used. In addition, for inks with high viscosity such as correction fluid, a valve mechanism is placed 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.

[0003]

[Problems to be solved by the device]

 However, the above-mentioned pen core has a complicated structure because it is necessary to form an ink groove, an air groove, and an ink storage portion composed of a large number of comb teeth, and there is a problem that it takes time to manufacture. . In addition, the valve mechanism also has the problem that the structure is complicated due to the large number of parts.

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

[0005]

[Means for Solving the Problems]

 In order to achieve such an object, the writing instrument of the present invention has 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 tip formed through a step. Part of the pen body that protrudes from the tip opening of the tip, the base end part is fixed inside the chip, and the small diameter part of the tip can be swung to swing. Closes the tip opening of the tip, and when the tip of the pen tip comes into contact with the writing surface and swings during use, the stepped portion of the pen body unblocks the tip opening of the tip and allows ink to be ejected.

[0006]

[Action]

 When not in use, ink is not ejected because the stepped portion of the pen block the tip opening of the tip, but the base end of the pen is fixed inside the tip and the small diameter part of the tip can swing. Therefore, at the time of use, the tip of the pen tip comes into contact with the writing surface and swings, the blockage of the tip opening of the tip due to the stepped portion of the pen body is released, and ink is ejected for writing. Therefore, a pen core and a valve mechanism are not required, and a raw ink writing instrument having an extremely simple structure can be provided.

[0007]

【Example】

 The present invention will be described in detail below with reference to the embodiments shown in the drawings. In FIG. 1, an ink tank 1 which also functions as a shaft cylinder is directly filled with ink (not shown) having a relatively high viscosity. If a highly viscous ink such as a correction fluid is filled, the ink tank 1 is made of a highly flexible material. Then, when it is pressed with a fingertip, it is deformed to pressurize the inside, and the ink is ejected by the pressure. A tip 2 is fixed to the tip of the ink tank 1. The tip 2 is a cylindrical body with a bottom, and a front end opening 21 is formed on the front surface.

The pen body 3 is formed of a highly elastic synthetic resin, and the base end portion 31 is pressed against the inner peripheral surface of the tip 2 and fixed by the caulking portion 22. The pen body 3 has a slightly smaller diameter on the front side of the base end portion 31 to form a gap between the inner peripheral surfaces of the tip 2, but at the tip end portion of the pen body 3, the pen tip 3 has a small diameter through a step 32. The part 33 is formed. Then, the small diameter portion 33 projects from the tip opening 21, and the step portion 32 presses against the front surface of the chip 3 to close the tip opening 21. Therefore, it is possible to prevent ink discharge in a natural state without using a pen core or a valve mechanism. Further, in the portion of the pen body 3 inside the chip 2, as shown in FIG. 2, a longitudinal ink groove 34 is formed on the outer peripheral surface thereof.

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. Further, since the base end portion 31 is fixed in the chip 2 and the front end of the base end portion 31 has a slightly smaller diameter, a gap is formed between the inner peripheral surfaces of the chip 2 so that the pen body 3 is formed. Can be deformed so as to swing around the base end portion 31, and the small diameter portion 33 can move within the range of the tip end opening 21. When the small diameter portion 33 moves and contacts the peripheral edge of the tip opening 21, the tip of the ink groove 34 faces the tip opening 21. That is, the blockage of the tip end 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 brought into contact with the paper surface P for writing 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. The small diameter portion 33 comes into contact with the peripheral edge of the tip opening 21. Therefore, the tip of the ink groove 34 faces the tip opening 21, and the ink is ejected along the small diameter portion 33 and writing is possible. 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. 1 by its own elastic force, and the step portion 32 closes the tip end opening 21, so that ink is not ejected. .

[0011]

[Effect of device]

 As described above, in the writing instrument of the present invention, the small-diameter portion of the pen body formed through the step portion at the tip portion protrudes from the tip opening of the tip, and the base end portion is fixed inside the tip so that the tip has a small diameter portion. When the pen is not in use, the stairs of the pen block the tip opening of the tip when not in use, and when the tip of the pen tip comes into contact with the writing surface and rocks when not in use, Since the blockage of the tip opening of the tip due to the step is released so that ink can be ejected, the pen body plays a role of a pen core or a valve mechanism. Therefore, a pen core, a valve mechanism, etc. are not required, and a writing instrument of raw ink type having an extremely simple structure can be provided.

[Brief description of 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 usage state.

[Explanation 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 part of pen 34 Ink groove P Paper surface

Claims (1)

[Scope of utility model registration request] 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 of the tip formed through a step portion protrudes from the tip opening of the tip, It consists of a pen body whose base end is fixed inside the tip and is deformable so that the small diameter part of the tip swings.When not in use, the step of the pen body closes the tip opening of the tip,
When the tip of the pen tip comes into contact with the writing surface and swings during use,
A writing instrument characterized in that the stepped portion of the pen body releases the blockage of the tip opening of the tip to eject ink.