JP2007253368A - Writing implement - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a writing implement which obtains a sufficient strength without increasing a wall thickness even when ceramic ware is used for a writing implement member, and also can be molded easily relatively without being damaged on the occasion of molding the member, and which has both high design properties and a good texture. <P>SOLUTION: The writing implement 1 has a gripping part 3 of a different material from that of a shaft tube 2 and the gripping part 3 is constituted of the ceramic ware. When the total length of the gripping part 3 is denoted by L, the outside diameter by A and the inside diameter by B, they satisfy the relation of (A-B)/L≥0.03. The weight of the gripping part 3 occupies 20% or more of the whole weight of the writing implement. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a writing instrument. Furthermore, it is related with the writing instrument which comprised the holding part with the ceramic.

Conventionally, a writing instrument in which a shaft cylinder is formed of earthenware has been disclosed (for example, see Patent Documents 1 and 2).
The writing instrument uses a hollow (cylindrical) earthenware that opens at one or both ends as a shaft cylinder, so that a highly designable appearance and excellent texture can be obtained. However, since it is necessary to make the entire length relatively long in order to use it as a shaft tube, it is necessary to make it thick from the viewpoint of moldability and strength. For this reason, the outer diameter of the shaft tube becomes thick, which is not practical.
Japanese Utility Model Publication No. 58-53681 Japanese Utility Model Publication No. 5-82585

  The present invention solves the above-mentioned problem, and even if ceramics are used as a writing instrument member, sufficient strength can be obtained without increasing the thickness, and comparison can be made without damaging the member. The present invention provides a writing instrument that combines high design and excellent texture that can be easily molded.

The present invention is a writing instrument provided with a grip portion made of a material different from that of the shaft cylinder, and the grip portion is required to be made of ceramic.
Furthermore, when the total length of the gripping part is L, the outer diameter is A, and the inner diameter is B, it is necessary to satisfy the relationship of (A−B) /L≧0.03.
Furthermore, the weight of the gripping part occupies 20% or more of the entire weight of the writing instrument, the maximum outer diameter of the gripping part is 10 mm or less, a glaze is applied to the surface of the gripping part, the gripping It is required that the surface of the part is decorated such that it has irregularities, and that a convex part is provided on the front and / or rear shaft cylinder of the gripping part.
In the present invention, “front” indicates the pen tip side, and “rear” indicates the shaft tube side.

  According to claim 1 of the present invention, the writing instrument has a high appearance design and an excellent texture.

  According to the second aspect of the present invention, it is possible to obtain a grip portion having strength that is difficult to break during use and molding and high moldability.

  According to the third aspect of the present invention, the center of gravity is easily positioned in the front, and the weight balance during writing is excellent.

  According to the fourth aspect of the present invention, the gripping portion having sufficient strength without making it thick, the writing instrument has an outer diameter that is difficult to break.

  According to claim 5 of the present invention, the strength can be further increased.

  According to the sixth aspect of the present invention, the decorativeness is enhanced, and an anti-slip effect when gripped and a high texture are obtained.

  According to the seventh aspect of the present invention, it is possible to prevent the gripping portion from coming into direct contact when dropped, so that the gripping portion is not easily damaged.

  The writing instrument of the present invention is a writing instrument with high decorativeness and texture using a shaft cylinder provided with a ceramic gripping portion at a position gripped by a shaft cylinder formed of a material other than ceramics such as resin or metal.

The gripping part is composed of ceramics such as pottery, porcelain, bone china, new bone, ceramics, fine ceramics, glass, etc., in front of the writing instrument so that it can be gripped at the time of writing (that is, pen point side from 1/2 of the total length of the writing instrument) At least. As a result, a grip portion having a high texture is formed.
The gripping portion has a relationship of (A−B) /L≧0.03 when the overall length is L, the outer diameter is A, and the inner diameter is B (that is, the thickness ratio to the total length of the gripping portion is 1). 0.5% or more).
By satisfying the above relationship, the grip portion can be obtained with a thickness suitable for the desired length, so that it is possible to suppress the difficulty in obtaining sufficient strength due to extreme uneven thickness during molding.
In particular, by satisfying the above relationship, it is possible to obtain a gripping portion having a strength that does not easily cause breakage such as chipping or cracking during use and molding, so that the gripping portion has a thin outer diameter (specifically, the maximum outer diameter). Even when the diameter is 10 mm or less, a material having sufficient strength can be obtained.
In the relational expression, the upper limit is not particularly limited, but 0.4 ≧ (A−B) / L (that is, the ratio of the thickness to the total length of the gripping portion is 20% or less), preferably 0.2 ≧ (A -B) / L (that is, the ratio of the wall thickness to the total length of the gripping portion is 10% or less), the size is optimal for the gripping portion for writing instruments.

  The gripping portion is formed in a substantially cylindrical shape or a polygonal cylinder (that is, a cylindrical shape having a cross-sectional shape such as a circle, an ellipse, a regular polygon, or a regular polygon having a chamfered corner), and at least on the front side of the shaft cylinder. Be placed. At that time, the thickness of the gripping portion is 2 mm or less, preferably 1.5 mm or less. Thereby, it is possible to provide the gripping portion without increasing the outer diameter of the writing instrument. In order to obtain sufficient strength when gripped, the thickness is preferably 0.5 mm or more.

It is preferable to decorate the grip portion so that the surface is uneven. Thereby, a finger can be prevented from slipping when the grip portion is gripped during writing.
Examples of the decoration include a shape such as a plurality of grooves and ridges (for example, circumferential grooves and semicircular protrusions), and post-processing (surface treatment) such as pattern pattern painting. A thing can be illustrated, and while improving decorativeness, the anti-slip | skid effect of a holding part can be improved.
Further, as the gripping part, an unglazed one can be used as long as it is ceramic, but it is preferable to apply glaze. Thereby, while being able to provide high intensity | strength with ceramics, a strong glossiness is acquired.

  The weight of the grip portion is preferably set so as to occupy 20% or more of the entire writing instrument weight. Thereby, the center of gravity of the entire writing instrument can be easily positioned ahead of ½ of the total length, so that the writing instrument is excellent in weight balance during writing.

The shaft cylinder in which the grip portion is disposed on the front surface is formed of a material other than ceramics such as resin, metal, and wood, and is hollow so that ink can be stored directly or via other members. It is formed.
It is preferable that a convex portion having an outer diameter larger than the maximum outer diameter of the grip portion is provided in front and / or rear of the portion where the grip portion of the shaft cylinder is disposed. Even if an impact such as a drop is applied by the convex portion, the grip portion is not directly impacted, so that it is possible to avoid the occurrence of cracks, chipping, and the like, and the safety during writing can be maintained.
The convex portion can be provided partially on the outer peripheral surface of the shaft tube or can be provided continuously (for example, in a bowl shape).

As long as the writing instrument is provided with a ceramic gripping part at the place to be gripped during use (the outer peripheral surface of the shaft tube), a general-purpose ballpoint pen or marking pen form (cap type or Can be used with pen tip in / out type).
For example, as a marking pen, a fiber pen body, felt pen body, plastic pen body, fountain pen type metal pen body, etc. are attached to the writing tip, and an ink occlusion body made of a fiber bundle housed in the shaft tube is impregnated with ink. Structure for supplying ink to the writing tip, containing ink directly in the shaft cylinder, and interposing an ink flow rate adjusting member composed of a comb groove-like ink flow rate adjusting member or fiber bundle, direct ink inside the shaft tube And a marking pen (sign pen, felt pen, brush pen, etc.) having a structure for supplying a predetermined amount of ink to the writing tip by a valve mechanism.
In addition, as a ballpoint pen, for example, an ink occlusion body made of a fiber bundle housed in the shaft cylinder is impregnated with ink, and ink is supplied to the writing tip. The ink flow adjusting member and the ink flow adjusting member composed of a fiber bundle are interposed, and the ink containing tube filled with the ink composition in the shaft cylinder, the ink containing tube being attached to the tip with the ball mounted on the tip. A ballpoint pen having a structure in which an ink follower such as a liquid stopper or a solid stopper is in close contact with the end face of the ink to prevent backflow can be exemplified.

Embodiments of the present invention will be described with reference to the following drawings.
FIG. 1 is an external view of the writing instrument of the present invention when the pen tip is projected and retracted, and FIG. 2 is a cross-sectional view of a gripping portion.

  The writing instrument 1 is a pen-tip retractable writing instrument that protrudes and retracts the pen tip 4 by pressing the operating portion 22 at the rear end of the shaft tube 2 forward, and a ceramic gripping portion 3 is disposed in front of the surface of the shaft tube 2. At the same time, the metal clip 5 is fixed to the rear.

The shaft cylinder 2 of the writing instrument 1 is a hollow molded product (specifically, a molded product made of PC resin) made of a synthetic resin such as PP resin, PC resin, PS resin, PET resin, ABS resin, It is screwed so that it can be divided into a front neck (pen nib side) and a rear body (actuator side) at the rear of the grip.
In the shaft tube 2, a ballpoint pen refill containing ink and an ink follower is housed directly in an ink housing tube in which a pen tip 4 is press-fitted and held via a holder at the tip. A rotating cam mechanism is provided for moving the refill in the front-rear direction.
The outer diameter of the barrel portion of the shaft tube 2 is set to 9 mm.

Further, a collar portion 21 having an outer diameter D set to 10 mm is provided at the neck portion in front of the shaft tube 2, and has a shape protruding from the other portion of the shaft tube 2 to the surface.
By providing the collar part 21, when the writing instrument 1 falls, the collar part 21 comes into contact with the falling surface.

The grip portion 3 is formed of a substantially cylindrical pottery having a glaze treatment on the surface, and is covered in a fixed state on the outer peripheral surface of the shaft tube 2 (neck portion).
The grip portion 3 has a shape such that the total length L is 40 mm, the outer diameter A is 9 mm, and the inner diameter B is 7 mm (that is, the wall thickness is 1 mm). Therefore, the grip part 3 satisfies the relationship of (A−B) /L≧0.03, and even if it is a thin-walled ceramic member, it has a high moldability and is not easily damaged.
Furthermore, since the outer diameter is smaller than that of the flange portion 21, it does not come into direct contact with the contact surface when dropped, so that it is more difficult to break.
In addition, a polygonal design portion 31 is painted on the surface of the grip portion 3, and the design portion 31 is slightly raised from the surface of the grip portion. Therefore, the said pattern part 31 exhibits the antiskid effect with the decoration effect.

The overall length of the writing instrument 1 (the distance from the tip of the pen tip 4 to the rear end of the operating portion 22) is set to 130 mm, and the total weight is set to 7.7 g. Further, the writing instrument 1 has a structure in which the distance to the center of gravity is set to 60 mm from the tip of the nib 4 and has a center of gravity ahead of the center, and thus has an excellent weight balance during writing. .
In addition, due to the weight distribution, the collar 21 comes into contact first because it falls from the front when dropped. For this reason, the grip portion 3 is more difficult to be damaged.

It is an external view which shows one Example of the writing instrument of this invention. It is sectional drawing of a holding part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Writing instrument 2 Shaft cylinder 21 collar part 22 action part 3 grip part 31 design part 4 pen point 5 clip A grip part outer diameter B grip part inner diameter D collar part maximum outer diameter L full length of grip part

Claims (7)

  A writing instrument comprising a gripping part made of a material different from that of the shaft cylinder, wherein the gripping part is made of ceramic.   2. The writing instrument according to claim 1, wherein when the overall length of the grip portion is L, the outer diameter is A, and the inner diameter is B, the relationship of (A−B) /L≧0.03 is satisfied.   The writing instrument according to claim 1 or 2, wherein the weight of the grip portion occupies 20% or more of the entire weight of the writing instrument.   The writing instrument according to any one of claims 1 to 3, wherein a maximum outer diameter of the grip portion is 10 mm or less.   The writing instrument according to any one of claims 1 to 4, wherein a glaze is applied to a surface of the grip portion.   The writing instrument according to any one of claims 1 to 5, wherein the surface of the grip portion is decorated so as to have irregularities. The writing instrument according to any one of claims 1 to 6, wherein a convex portion is provided on a shaft cylinder in front of and / or behind the gripping portion.

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