JP2010094907A - Writing utensil - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a writing utensil keeping soft writing feeling through a long period even when a pen tip is repeatedly elastically deformed. <P>SOLUTION: The writing utensil has the pen tip 3 elastically deformable by the writing pressure in writing, and comprises the elastically deformable pen tip 3 and a pen tip support member 4 attached to the side surface of the pen tip 3. A recessed part 31 is formed on the side surface of the pen tip 3 and a protrusion 41 engaged with the recessed part 31 is formed on the side surface of the pen-tip support member 4. An ink occluding body 5 impregnated with ink is housed in a barrel tube 2. The pen tip 3 is protruded to the outside from a front end opening part of the barrel tube 2. The rear end of the pen tip 3 is connected to the ink occluding body 5. A middle part of the pen-tip support member 4 is journaled on the inner surface of the front end opening part of the barrel tube 2 in front side of the ink occluding body 5. The pen-tip support member 4 and the pen tip 3 are attached and immersed into the ink occluding body 5 in an attached state. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

The present invention relates to a writing instrument. Specifically, the present invention relates to a writing instrument in which the pen tip is elastically deformable by the writing pressure at the time of writing.

Patent Document 1 describes a structure of a felt fountain pen in which one side of a felt pen tip is supported by a supporting edge protruding in a tongue shape.
Japanese Utility Model Publication No. 35-29542

The writing instrument of Patent Document 1 has a structure that uses only the elasticity of the pen nib itself even when the pen nib is elastically deformed by the pen pressure during writing and a soft writing feeling is obtained. When elastically deformed, the elasticity of the nib gradually weakens or the nib is bent, and there is a possibility that the soft writing feeling cannot be maintained for a long time.

The present invention is intended to solve the above-described conventional problems, and an object of the present invention is to provide a writing instrument that can maintain a soft writing feeling over a long period of time even when the pen tip is elastically deformed repeatedly. In the present invention, “front” refers to the pen tip side, and “rear” refers to the opposite side.

[1] The first invention of the present application is a writing instrument in which the pen tip 3 is elastically deformable by writing pressure at the time of writing, and is attached to an elastically deformable pen tip 3 and a side surface of the pen tip 3. It is required to be composed of a pen tip support member 4 that can be elastically deformed.

In the writing instrument 1 of the first invention, the pen tip support member 4 that can be elastically deformed is attached to the side surface of the pen tip 3 that can be elastically deformed. Since the supporting member 4 is elastically deformed at the same time, even if the nib 3 is repeatedly elastically deformed, the elasticity of the nib 3 does not gradually weaken or the nib 3 does not bend, and soft writing over a long period of time. A feeling can be maintained.

[2] According to a second invention of the present application, in the writing instrument 1 of the first invention, a recess 31 is formed on a side surface of the pen tip 3, and a side surface of the pen tip support member 4 can be engaged with the recess 31. It is a requirement that the convex part 41 be formed.

In the writing instrument 1 according to the second aspect of the present invention, the convex portion 41 on the side surface of the pen tip support member 4 is engaged with the concave portion 31 on the side surface of the pen tip 3 to move the pen tip 3 in the front-rear direction (that is, the pen tip). It is possible to prevent the tip 3 from dropping and the pen tip 3 from being buried.

[3] According to a third invention of the present application, in the writing instrument 1 of the first or second invention, the ink storage body 5 that can be impregnated with ink is accommodated in the shaft cylinder 2, and the front end opening of the shaft cylinder 2 The pen nib 3 protrudes to the outside, the rear end of the pen nib 3 is connected to the ink occlusion body 5, and the middle portion of the pen nib support member 4 is connected to the shaft cylinder 2 in front of the ink occlusion body 5. The pen tip support member 4 and the pen tip 3 are inserted into the ink occlusion body 5 in an attached state as a requirement.

In the writing instrument 1 of the third invention, the intermediate portion of the pen tip support member 4 is pivotally supported on the inner surface of the front end opening of the shaft cylinder 2 in front of the ink occluding body 5, thereby providing a pivotal support portion (shaft portion 42. In addition, the pen tip 3 and the pen tip support member 4 in front of the bearing recess 21) can be elastically deformed by the writing pressure at the time of writing. Further, the writing instrument 1 of the third invention is formed by immersing the pen tip support member 4 and the pen tip 3 in the ink storage body 5 in an attached state, so that the pen tip 3 is repeatedly elastically deformed. A stable connection state between the rear end of the nib 3 and the ink storage 5 is maintained.

[4] A fourth invention of the present application is the writing instrument 1 according to the third invention, wherein the ink occlusion body 5 includes a first ink occlusion body 51, a second ink occlusion body 52, and the first ink. It comprises an ink guiding member 53 that connects the occluding member 51 and the second ink occluding member 52, and the ink guiding member 53 is a harder material than the first ink occluding member 51 and the second ink occluding member 52. It is a requirement that an engagement hole 53a is provided at the front end of the ink guide member 53, and a rear end portion of the pen tip support member 4 is inserted into the engagement hole 53a.

In the writing instrument 1 of the fourth invention of the present application, the ink occlusion body 5 includes a first ink occlusion body 51, a second ink occlusion body 52, and the first ink occlusion body 51 and the second ink occlusion body. By including the ink guide member 53 that connects to the ink storage member 52, a sufficient ink storage capacity of the entire ink storage body can be secured. In the writing instrument 1 according to the fourth aspect of the present invention, the ink guiding member 53 is made of a harder material than the first ink occluding body 51 and the second ink occluding body 52 and is engaged with the front end of the ink guiding member 53. By providing the hole 53a and inserting the rear end portion (engagement protrusion 43) of the pen tip support member 4 into the engagement hole 53a, the radial direction of the rear end portion of the pen tip support member 4 at the time of elastic deformation Therefore, the pen tip supporting member 4 can be stably elastically deformed.

In the present invention, the porous material constituting the ink occluding body 5 (that is, the first ink occluding body 51, the second ink occluding body 52, and the ink guiding member 53) is, for example, processing of a fiber bundle. Body (for example, resin processed body of fiber bundle or heat-bonded processed body of fiber bundle), felt processed body (for example, felt resin processed body, felt heat-bonded processed body, felt needle punch processed body) Etc.), or open cell bodies (for example, sponge).

In the present invention, examples of the nib 3 include a fiber bundle processed body, a synthetic resin open-cell body, and a synthetic resin molded body having a capillary gap.
In the present invention, the nib support member 4 may be, for example, a synthetic resin molded body.

In the writing instrument of the present invention, since the pen tip and the pen tip support member are elastically deformed simultaneously at the writing pressure, even when the pen tip is repeatedly elastically deformed, the elasticity of the pen tip gradually becomes weaker, The tip is not bent and the soft writing feeling can be maintained for a long time.

1 to 5 show an embodiment of the present invention.
The writing instrument 1 according to the present embodiment includes a shaft cylinder 2, an ink storage body 5 accommodated in the shaft cylinder 2, a pen tip 3 that is pierced and connected to the ink storage body 5, and the ink storage body 5. And a pen tip support member 4 that is inserted into the side surface of the pen tip 3.

The shaft cylinder 2 includes a front shaft 2a and a rear shaft 2b. The front shaft 2a and the rear shaft 2b are formed of a cylindrical synthetic resin molded body. The rear outer surface of the front shaft 2a is press-fitted into the inner surface of the front end opening of the rear shaft 2b.

An annular member 2c is press-fitted into the inner surface of the front end opening of the front shaft 2a. The rear end of the annular member 2c is brought into contact with the step 22 on the inner surface of the front end opening of the front shaft 2a. A pair of concave grooves extending in the axial direction and opening forward are formed on the inner surface of the front shaft 2a behind the step portion 22 at a position 180 degrees symmetrical with respect to the axis. The front of the concave groove is closed by the annular member 2c, and a bearing concave portion 21 is formed between the rear end of the concave groove and the rear end of the annular member 2c. The annular member 2c can prevent the shaft portion 42 from falling off the bearing recess 21.

The ink occlusion body 5 includes a first ink occlusion body 51, a second ink occlusion body 52, and an ink guiding member 53. The first ink occlusion body 51 and the second ink occlusion body 52 are made of a fiber bundle processed body. The ink guiding member 53 is made of a fiber processed resin, and is made of a harder material than the first ink occluding body 51 and the second ink occluding body 52. The ink guiding member 53 is pierced and connected to the rear end of the first ink storage body 51 and the front end of the second ink storage body 52.
The ink guide member 53 has an engagement hole 53a extending therethrough in the axial direction. The engagement hole 53a of the ink guide member 53 is formed in a transverse cross section.

The nib 3 is formed of a fiber bundle processed body and is formed in a plate shape. The pen tip 3 is pierced and connected to the front surface of the first ink storage body 51. A recess 31 is formed on one side surface of the nib 3. The nib 3 projects forward from the front end opening of the shaft cylinder 2 (front shaft 2a).

The pen point support member 4 is formed of a plate-shaped synthetic resin molded body. The side surface of the pen tip support member 4 is in contact with one side surface of the pen tip 3. Thereby, the side surface of the pen tip support member 4 is attached to the one side surface of the pen tip 3. The front end of the pen tip 3 projects forward from the front end of the pen tip support member 4. The nib support member 4 supports the side surface of the nib 3 (that is, the side surface from the recess 31 of the nib 3 to the rear end of the nib 3) in a contact state.

On the front end side surface of the pen tip support member 4, a convex portion 41 protruding in the radial direction is integrally formed. The convex portion 41 on the side surface of the pen tip support member 4 is engaged with the concave portion 31 on the side surface of the pen tip 3. Thereby, the movement of the nib 3 in the front-rear direction (that is, the pen nib 3 is dropped and the pen nib 3 is buried) can be prevented.

On both side surfaces (both side surfaces in the width direction) of the intermediate portion of the pen tip support member 4, shaft portions 42 are integrally projected. The shaft recess 42 on the inner surface of the front end opening of the shaft cylinder 2 (front shaft 2a) is engaged with the shaft portion 42 of the pen tip support member 4, and the pen tip support member 4 is pivotally supported. Accordingly, the pen tip 3 and the pen tip support member 4 in front of the shaft support portion (the shaft portion 42 and the bearing recess 21) can be elastically deformed.

A rear portion of the pen tip support member 4 with respect to the shaft portion 42 has a tapered shape toward the rear. The rear end portion of the nib support member 4 becomes an engagement protrusion 43 having a substantially square cross section, and the engagement protrusion 43 is inserted into the engagement hole 53a of the ink guide member 53, so that the engagement protrusion The portion 43 is engaged with the engagement hole 53a.

In the present embodiment, the ink occlusion body 5 is impregnated with thermochromic ink. The thermochromic ink is a reversible thermochromic ink. The reversible thermochromic ink is a heat decoloring type that decolors by heating from a colored state, a color memory retaining type that reversibly stores and retains a colored state or a decolored state in a specific temperature range, or from a decolored state Various types such as a heating coloring type that develops color by heating and returns to a decolored state by cooling from the colored state can be used alone or in combination.

The coloring material contained in the reversible thermochromic ink includes conventionally known (a) electron donating color-forming organic compounds, (b) electron-accepting compounds, and (c) color reactions of both. A reversible thermochromic microcapsule pigment in which a reversible thermochromic composition containing at least three essential components of a reaction medium for determining the occurrence temperature of the microcapsule is preferably used.

As shown in FIG. 4, when the writing instrument 1 of the present embodiment is not writing, the pen tip 3 and the pen tip support member 4 are not elastically deformed. As shown in FIG. 5, in the writing instrument 1 of the present embodiment, the pen tip 3 and the pen tip support member 4 are elastically deformed simultaneously by the writing pressure at the time of writing. Therefore, even when the nib 3 is repeatedly elastically deformed, the elasticity of the nib 3 does not gradually weaken or the nib 3 is not bent, and a soft writing feeling can be maintained for a long time.

It is a longitudinal cross-sectional view of embodiment of this invention. It is the sectional view on the AA line of FIG. It is the BB sectional view taken on the line of FIG. It is a perspective view of the nib at the time of non-writing (before elastic deformation) and a nib support member. It is a perspective view of the pen tip at the time of writing (elastic deformation state) and a pen tip support member.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Writing instrument 2 Shaft cylinder 2a Front shaft 2b Rear shaft 2c Annular member 21 Bearing recessed part 22 Step part 3 Pen point 31 Recessed part 4 Pen point support member 41 Projection part 42 Shaft part 43 Engagement protrusion part 5 Ink occlusion body 51 1st ink Occlusion body 52 second ink occlusion body 53 ink guide member 53a engagement hole P handwriting

Claims (4)

The pen tip is a writing instrument that can be elastically deformed by the writing pressure during writing, and comprises an elastically deformable pen tip and an elastically deformable pen tip support member attached to a side surface of the pen tip. A writing instrument. The writing instrument according to claim 1, wherein a concave portion is formed on a side surface of the pen tip, and a convex portion engageable with the concave portion is formed on a side surface of the pen tip supporting member. An ink occlusion body that can be impregnated with ink is accommodated in a shaft cylinder, a pen tip is projected outside from a front end opening of the shaft cylinder, and a rear end of the pen tip is connected to the ink occlusion body, The intermediate portion of the pen tip support member is pivotally supported on the inner surface of the front end opening of the shaft cylinder in front of the ink storage body, and the pen tip support member and the pen tip are inserted into the ink storage body in an attached state. The writing instrument according to claim 1 or 2. The ink occlusion body comprises a first ink occlusion body, a second ink occlusion body, and an ink guiding member connecting the first ink occlusion body and the second ink occlusion body, and the ink induction The member is made of a harder material than the first ink storage body and the second ink storage body, an engagement hole is provided at a front end of the ink guide member, and a rear end of the pen tip support member is formed in the engagement hole The writing instrument according to claim 3, wherein the part is inserted.

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