JP2001088493A - Writing utensil - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an easily operable writing utensil, the structure of valve mechanisms which is simple and with which no paper surface is stained. SOLUTION: A main ink chamber C1 is provided between a first valve mechanism 30 and a second valve mechanism 40 and a small ink chamber C2 is provided between the second valve mechanism 40 and a writing body 20. The first valve mechanism and the second valve mechanism consist of valve main bodies consisting respectively of large diametral parts 31 and 41, small diametral parts 32 and 42 and blocking bodies 35 and 45, which are respectively fitted onto the small diametral parts in order to block through holes 34 and 44. An air compressing member 50 is connected with the first valve mechanism. By pressurizing through the reduction of the internal volume of the air compressing member, both the first valve mechanism and the second valve mechanism are opened, resulting in shifting the ink in the main ink chamber to the small ink chamber so as to realize a writable state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a writing implement in which a writing body such as a brush head having a low ink holding power is arranged at the tip of an ink cylinder.

[0002]

2. Description of the Related Art A writing instrument such as a pen having a brush head as a writing body or a marker having a rod-shaped writing body made of felt or plastic having continuous ventilation holes has a low ink holding power. If the ink head in the ink cylinder is directly applied to the writing body, the ink flows out of the writing body to the outside. Therefore, a valve mechanism for controlling the ink supplied to the writing body is required. Then, when the ink contained in the cursive is reduced, the valve mechanism is opened to supply the ink to the cursive.

[0003]

These valve mechanisms consist of a valve seat and a valve body. When the valve body is seated on the valve seat, the valve mechanism is closed, and when the valve body is separated from the valve seat, the valve mechanism is opened. Yes,
To open and close the valve mechanism, it is necessary to move the valve element.
In a marker having a rod-shaped writing body, the writing body and the valve body are mechanically connected, and when the writing body is pressed and retracted on the paper, the valve body separates from the valve seat and ink is supplied to the writing body, and the pressing is performed. In many cases, when released, the valve body sits on the valve seat to close the valve mechanism. In addition, brush pens with brush ears as cursive
Since it is not possible to move the valve body by pressing the brush against the paper surface, a knock mechanism is provided at the tail end of the ink cylinder, the knock bar and the valve body are mechanically connected, and the valve mechanism is opened by knocking operation, In many cases, the valve mechanism closes when the knocking operation is released.

[0004] However, these valve mechanisms have a problem that the number of parts is increased and the structure is complicated. Further, a device in which the valve mechanism is opened by pressing the rod-shaped cursive body on the paper surface has a problem that the paper surface is soiled.

Accordingly, an object of the present invention is to provide a writing instrument which has a simple structure of the valve mechanism, does not contaminate the paper surface, and is easy to operate.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to a writing instrument in which a writing body such as brushhead having a low ink holding force is arranged at the tip of an ink cylinder. And a first valve mechanism and a second valve mechanism disposed near the writing body, a main ink chamber between the first valve mechanism and the second valve mechanism, and a small ink chamber between the second valve mechanism and the writing body, First
Each of the valve mechanism and the second valve mechanism has a center hole,
A valve body consisting of a large-diameter portion that is in intimate contact with the inner wall of the ink cylinder and a small-diameter portion that is provided with a through hole in the radial direction and is connected to the large-diameter portion
The first valve mechanism is connected to an air compression member, and is compressed with a fingertip to reduce the internal volume of the air compression member and pressurized. , First
When the closing member of the valve mechanism is expanded and air enters the main ink chamber through the through hole, the main ink chamber is pressurized. When the main ink chamber is pressurized, the closing member of the second valve mechanism is expanded. Then, the ink moves from the through hole to the small ink chamber, and the ink is supplied to the cursive body to enable writing.

[0007]

Embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 1 shows an example in which the present invention is applied to a brush pen. In FIG. 1, a leading end 11 is fixed to the tip of an ink tube 10 formed of a hard synthetic resin into a cylindrical shape, and a writing body 20 is fitted into a center hole of the leading end 11. The writing body 20 is a brush ear formed by shaping thin hairs into a spike shape, and the outer circumference of the brush ear is bundled by, for example, a heat-shrinkable tube 21. The ink relay core 22 is inserted into the brush, and the ink is supplied to the brush through the ink relay core 22.

The writing body 20 is not limited to brush ears, but may be a rod-shaped writing body made of felt, plastic having continuous ventilation holes, etc. In any case, the ink holding power of the writing body 20 itself is weak. If the ink head in the ink cylinder 10 is directly applied to the writing body 20, the ink flows out of the writing body 20 to the outside. Then, when not in use, the cap 60 is fitted to the front opening 10.

A first valve mechanism 30 is arranged at the tail end of the ink cylinder 10, and a second valve mechanism 40 is arranged near the writing body 20. Then, the first valve mechanism 30 and the second valve mechanism 40
The space between is the main ink chamber C1 filled with the ink L, and the space between the second valve mechanism 40 and the writing body 20 is the small ink chamber C2.

The first valve mechanism 30 comprises a valve body having a large diameter portion 31 and a small diameter portion 32 and a closing body 35. Large diameter part 3
Numeral 1 is air-tightly fixed to the inner wall of the ink cylinder 10 via an O-ring 36, and a small-diameter portion 32 projects forward from a large-diameter portion 31. The central hole 3 is provided in the large diameter portion 31 and the small diameter portion 32.
3 is formed, and a radial through hole 34 is formed in the small diameter portion 32. The closing body 35 is a bottomed cylindrical body made of a soft elastic body, for example, silicone rubber, and is fitted in the small diameter portion 32 to close the through hole 34. Accordingly, when the closing body 35 is expanded and the closing of the through hole 34 is released, the center hole 33 is opened.
4 and communicate with the main ink chamber C1.

An air compression member 50 is connected to the tail end of the first valve mechanism 30. The air compressing member 50 is a cylindrical body with a bottom made of a resilient soft elastic body. The tubular portion is a bellows-like deformed portion 52, and a vent hole 51 is provided on a tail end surface. Then, with the air hole 51 closed, the air compression member 5 is closed.
When the inner volume of the air compression member 50 is reduced, the inside of the air compression member 50 and the center hole 33 of the first valve mechanism 30 are in a pressurized state. The center hole 33 of the first valve mechanism 30 communicates with the atmosphere to release the pressurized state, and the air compression member 50 restores its original shape by its own elasticity.

The second valve mechanism 40 has the same structure as the first valve mechanism 30. That is, the valve body includes a large diameter portion 41 and a small diameter portion 42 in which a center hole 43 is formed, and a closing member 45 formed of a soft elastic material. Is fixed in contact with the inner wall. The closing body 45 is fitted in the small diameter portion 42 to close the through hole 44. Therefore, when the closing body 45 is expanded and the closing of the through hole 44 is released, the center hole 4 of the second valve mechanism 40 is opened.
Reference numeral 3 communicates with the small ink chamber C2 through the through hole 44. That is, when the closing body 45 is expanded to release the closing of the through hole 44, the main ink chamber C1 communicates with the small ink chamber C2.

As described above, the first valve mechanism 30 and the second valve mechanism 40 consist only of the valve body and the closing body, have a small number of parts and are extremely simple in structure, and therefore have a low ink holding power. The structure as a writing implement having a cursive writing is also very simple.

However, when the amount of ink is reduced at the start of writing or during writing, as shown in FIG. 2, the air compression member 50 is pressed by the fingertip while the air hole 51 is closed, and the air compression member is pressed. The deforming portion 52 of 50 is deformed. Thereby, the internal volume of the air compression member 50 is reduced, and as described above, the inside of the air compression member 50 and the center hole 33 of the first valve mechanism 30 are in a pressurized state. Then, when the air pressure becomes equal to or higher than a predetermined value, the closing body 35 expands to release the closing of the through hole 34, that is, the first valve mechanism 30 opens, and the pressurized air enters the main ink chamber C1. I do.

When the pressurized air enters the main ink chamber C1, the inside of the main ink chamber C1 is also pressurized. Then, since the ink L in the main ink chamber C1 pressed by the pressurized air spreads the closing body 45, the closing of the through hole 44 is released,
That is, the second valve mechanism 40 is opened, and the ink L in the main ink chamber C1 moves to the small ink chamber C2. Then, the ink L moved to the small ink chamber C2 is supplied to the writing body 20 through the ink relay core 22, and becomes writable.

When the pressing by the fingertip is released, as described above, the inside of the air compression member 50 and the center hole 33 of the first valve mechanism 30 are released from the pressurized state by communicating with the atmosphere, and the closing body 35 is closed. Close. That is, the first valve mechanism 30 is closed. Accordingly, the pressurized state in the main ink chamber C1 is also released, the closing body 45 closes the through hole 44, the second valve mechanism 40 is closed, and the ink L in the main ink chamber C1 does not move to the small ink chamber C2. . Therefore, the writing body 20 does not have a large head of ink, and the ink does not flow out of the writing body 20 to the outside. And
If ink is not sufficiently ejected from the writing body 20 by one pressing operation, this pressing operation may be repeated as necessary.

As described above, by performing the pressing operation with the fingertip, a required amount of ink can be supplied to the writing body 20, and the operation is simple. Further, since it is not necessary to press the cursive body against the paper, the paper is not stained.

[0018]

As described above, the present invention relates to a writing instrument in which a writing element such as a brush ear having a low ink holding power is disposed at the tip of an ink cylinder. A first valve mechanism and a second valve mechanism are disposed, a main ink chamber is provided between the first valve mechanism and the second valve mechanism, and a small ink chamber is provided between the second valve mechanism and the writing body. Each of the two-valve mechanisms has a central hole and a large-diameter portion that is in close contact with the inner wall of the ink cylinder, and a small-diameter portion that is provided with a through-hole in the radial direction and is connected to the large-diameter portion. And a closing member made of a soft elastic material that is fitted into the small diameter portion to close the through hole, and an air compression member is connected to the first valve mechanism, and the internal volume of the air compression member is reduced by fingertips to increase the capacity. When the pressure is applied, the closing body of the first valve mechanism expands and air enters the main ink chamber through the through-hole, and the main ink chamber is pressurized. Is pressurized, the closing body of the second valve mechanism expands and ink moves from the through hole to the small ink chamber, and ink is supplied to the writing body, so that the structure of the valve mechanism is simple. Thus, a writing instrument that is easy to operate without soiling the paper surface can be provided.

[Brief description of the drawings]

FIG. 1 is a cross section showing an embodiment of the present invention.

FIG. 2 is an explanatory diagram of a pressing operation.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Ink cylinder 11 Front opening 20 Writing body 21 Heat shrinkable tube 22 Ink relay core 30 First valve mechanism 40 Second valve mechanism 31, 41 Large diameter portion of valve body 32, 42 Small diameter portion of valve body 33, 43 Center hole 34 , 44 Through hole 35, 45 Closure body 50 Air compression member 51 Vent hole of air compression member 52 Deformation part of air compression member 60 Cap

Claims (1)

[Claims] 1. A writing instrument in which a writing element such as brush ears having low ink holding power is disposed at the tip of an ink cylinder, wherein a first valve mechanism and a second valve mechanism are provided at a tail end of the ink cylinder and near the writing element. A main ink chamber is formed between the first valve mechanism and the second valve mechanism; a small ink chamber is formed between the second valve mechanism and the writing body; Each of the valve mechanisms has a central hole, and a valve body including a large-diameter portion that is in close contact with the inner wall of the ink cylinder, and a small-diameter portion that is provided with a through-hole in the radial direction and is connected to the large-diameter portion. And a closing member made of a soft elastic material which is fitted in the small diameter portion and closes the through hole, an air compression member is connected to the first valve mechanism, and the inner volume of the air compression member is reduced by a fingertip. And pressurize,
When the closing body of the first valve mechanism expands and air enters the main ink chamber through the through hole, the main ink chamber is pressurized. When the main ink chamber is pressurized, the second valve mechanism is pressed. A writing instrument, wherein the ink is supplied to the writing element by moving the ink from the through hole to the small ink chamber.