JP2002178685A - Writing implement - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem that in a valve mechanism type writing implement, writing has to be started after the valve mechanism is actuated by pushing a pen point repeatedly to a writing surface to supply enough ink to the pen point, causing the fouling of the writing surface and the damage of the pen point which is apt to be pushed more strongly than it is pushed during writing, and when ink can not be wiped off from the writing surface, e.g. a paper surface, the pen point is pushed to a fingertip or something else to foul it. SOLUTION: The writing implement is composed of a pen barrel 9 in which the valve mechanism 10 is opened/closed to supply ink in an ink housing chamber 11 to the pen point 6 and a cap 1 having a movable part 3 which can move through an approximately stair-shaped or arch-shaped thin-wall part 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a writing mechanism of a valve mechanism type in which a valve mechanism provided in a pen shaft is opened and closed so that a predetermined amount of ink in an ink chamber can be supplied to a pen tip.

[0002]

2. Description of the Related Art Conventionally, a writing mechanism of a valve mechanism type is provided with a pen tip formed of a pen core or a pen core holder holding a pen core at the tip of a pen shaft so as to be movable in the axial direction, and is moved. Thus, a certain amount of ink is supplied from the ink storage chamber in the pen shaft to the pen tip portion via the valve mechanism that moves integrally with the pen tip. When using such a writing instrument, after removing the cap, press the pen tip many times against the writing surface to activate the valve mechanism, supply enough ink to the pen tip, and then start writing. I had to.

[0003]

However, if the pen tip is pressed directly against the writing surface of a whiteboard or the like many times as described above at the start of writing, the writing surface is not only dirty but also requires time and effort for wiping. However, since the pressing force tends to be higher than the writing pressure at the time of normal writing, the pen tip may be damaged. Further, when the writing surface cannot be wiped off with ink like a paper surface, the pen tip is pressed against a fingertip or a peripheral article or the like, but there is a problem that the ink tip is stained. SUMMARY OF THE INVENTION The present invention has been made in view of such a problem, and operates the valve mechanism to supply ink from the ink storage chamber to the pen tip without directly pressing the pen tip against the writing surface at the start of writing, so that the ink is supplied smoothly. It is an object of the present invention to provide a writing instrument cap for enabling the start of writing.

[0004]

The valve mechanism is opened and closed, and is movable through a pen shaft that enables ink in the ink storage chamber to be supplied to the pen tip, and a thin step portion or a substantially arched thin portion. Writing implement consisting of a cap with a movable part.

[0005]

When the writing instrument is used, the movable portion provided on the cap is pressed against the elastic force of the thin portion and moved in the axial direction while the cap is put on the writing portion main body. Then,
The pen tip is moved by the pressing force, the valve member is opened, and the ink in the ink chamber is supplied to the pen tip. Next, when the pressing of the movable portion is released, the pen tip returns to the original position, the valve member is closed, and the supply of ink is stopped. When this operation is performed as necessary, ink sufficient for writing is supplied to the pen tip. Then, by removing the cap, you can write on the writing surface immediately.

In the present invention, the movable portion is a thin portion and is formed integrally with the inner surface of the cap, and the thin portion is formed in a substantially stepped or substantially arched shape. By forming the thin-walled portion in a substantially stepped or substantially arched shape, the movable portion can be made movable and resilient force can be obtained. The movable portion can also be used as a pen core protection cylinder that surrounds and protects the pen tip, and may be configured to directly press the inner surface of the pen core protection cylinder against the tip of the pen tip. Then, the open end of the pen core protection tubular portion short tubular portion may be pressed against the pen tip holder.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to embodiments. FIG. 1 is a first embodiment of the present invention. Reference numeral 1 denotes a cap, one end of which is opened and formed as an insertion port for the pen shaft 9, and the other end of which is formed by forming the movable portion 2 with a substantially stepped thin portion 4 integrally with the inner surface of the cap. It is. One end of the movable portion 2 is formed in a tubular shape, and is a pen core protection tubular portion 3 that surrounds and protects the pen tip 6. Further, a pressing member 5 is provided inside the pen core protection cylinder 3 so that the tip of the pen tip 6 can be pressed directly. As the pressing member 5, a material that can absorb ink, such as cotton or sponge, is used. By forming the thin portion 4 in a substantially stair-like shape, the movable portion 2 is movable, and it is possible to obtain elasticity.

Reference numeral 9 denotes a pen shaft, which is provided with a cylindrical ink storage chamber 11, and has a small-diameter portion at the tip, and the pen tip 6 is slidably inserted therein. Further, a valve mechanism 10 is provided between the ink storage chamber 11 and the pen tip 6. In addition, as the ink, any water-based or oil-based ink can be used. Reference numeral 6 denotes a pen tip. In this embodiment, the pen tip is composed of only the pen core 7.

When the cap 1 is placed on the pen shaft 9, the tip of the pen tip 6 is inserted into the pen tip protection cylinder 3 projecting inward from the movable part 2. When the movable part 2 is pushed down to the pen tip 5 against the elastic force of the thin part 4 from this state, the pen tip protection cylinder part 3 moves, and the pen core 7 is pressed by the pressing member 5 provided inside. Similarly, the valve mechanism 10 is opened, and the ink in the ink chamber 11 is supplied to the pen core 7 through the opening.

Then, when the pressing force on the movable portion 2 is released, the pen tip protection cylinder portion 3 returns to the original position by the restoring force of the thin portion 4, and the valve mechanism 10 also elastically restores and closes, and the ink storage chamber is closed. The communication between the pen 11 and the pen tip 6 is cut off. By repeating the above series of operations several times, the required ink is supplied from the ink storage chamber 11 to the pen tip 6 so that the pen can be written, and then the cap is removed to start writing on the writing surface.

FIG. 2 shows another embodiment 2 of the present invention. Reference numeral 1 denotes a cap, one end of which is opened and formed as an insertion port for the pen shaft 9, and the other end of which is formed by molding the movable portion 2 with a substantially arch-shaped thin portion 4 integrally with the inner surface of the cap. It is. One end of the movable portion 2 is formed in a tubular shape, and is a pen core protection tubular portion 3 that surrounds and protects the pen tip 6. By forming the thin-walled portion 4 in a substantially arch shape, the movable portion 2 is movable, and it is possible to obtain elasticity.

Reference numeral 9 denotes a pen shaft, which is provided with a cylindrical ink storage chamber 11. The tip portion is formed in a small diameter portion, and the pen tip 6 is slidably inserted therein. Further, a valve mechanism 10 is provided between the ink storage chamber 11 and the pen tip 6. In addition, as the ink, any water-based or oil-based ink can be used. Reference numeral 6 denotes a pen tip, which is configured with a pen core 7 fitted in a pen core holder 8.

When the cap 1 is put on the pen shaft 9, the tip of the pen tip 6 is inserted into the pen tip protection cylinder 3 projecting inward from the movable part 2. When the movable portion 2 is pushed down to the pen tip 5 against the elastic force of the thin portion 4 from this state, the pen tip protection cylinder 3 moves, and the end face of the pen tip protection cylinder 3 holds the pen core holder 8. When pressed, the valve mechanism 10
The ink in the ink storage chamber 11 is supplied to the pen core 7 through the opening.

Next, when the pressing force on the movable portion 2 is released, the pen tip protection cylinder portion 3 returns to the original position by the restoring force of the thin portion 4, and the valve mechanism 10 is also elastically restored and closed, and the ink storage chamber is closed. The communication between the pen 11 and the pen tip 6 is cut off. By repeating the above series of operations several times, the required ink is supplied from the ink storage chamber 11 to the pen tip 6 so that the pen can be written, and then the cap is removed to start writing on the writing surface.

[0015]

As described above, according to the present invention, the movable portion of the cap is reciprocally movable via the thin portion provided in the cap, and the pen tip is reciprocated by the reciprocal movement of the movable portion. Therefore, with a simple operation of moving the movable part back and forth against the elastic force with the cap covered before starting writing, a fixed amount of ink from the ink storage chamber of the pen shaft in conjunction with that operation Can be supplied to the pen tip. Accordingly, the writing surface can be prevented from being stained by removing the cap and pressing the pen tip against the writing surface as in the related art, and the pen tip can be reciprocated via the movable portion with a light touch. And the pen tip can be prevented from being damaged.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a first embodiment.

FIG. 2 is a sectional view of a second embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cap 2 Movable part 3 Pen tip protection cylinder part 4 Thin part 5 Pressing member 6 Pen tip 7 Pen core 8 Pen core holder 9 Pen shaft 10 Valve mechanism 11 Ink storage chamber

Claims (1)

[Claims] 1. A pen shaft that opens and closes a valve mechanism so that ink in an ink storage chamber can be supplied to a pen tip, and a movable portion that is movable through a substantially stepped or substantially arched thin portion. Writing implement consisting of a cap.