JP2007229974A - Stand type writing implement - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a stand type writing implement which can be constituted so as to hardly fall down when the top part of a cap is stood as a bottom face without increasing the weight of the whole writing implement by providing a weight article unnecessary for the cap, and which is excellent in portability. <P>SOLUTION: In the stand type writing implement 1 capable of standing by using the top part 31 of the cap as the bottom face, a center of gravity of the whole writing implement 1 is positioned by 50% of the whole length from the top part 31 of the cap under a condition that the cap 3 is mounted on the writing implement main body 2. A center of gravity of the writing implement main body 2 is positioned by 50% of the whole length from the tip of a pen point in the writing implement main body 2. When the maximum outer diameter of the top part 31 of the cap is D, and a distance from the top part 31 of the cap to the center of gravity of the whole writing implement 1 is L, the relation of L/D≤1.5 is satisfied. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a stand-type writing instrument. Furthermore, it is related with the stand-type writing instrument comprised so that it was hard to fall down in the standing state.

Conventionally, there has been disclosed a stand-type cap formed so that a bottom surface is a smooth surface and an opening is upward (see, for example, Patent Document 1).
The cap is attached to various writing instruments, and in order to maintain the stability when the writing instrument is erected, by increasing the thickness of the bottom surface part or arranging a weight (heavy article), A center of gravity is provided on the bottom of the cap. Therefore, since the weight of the entire writing instrument increases, it becomes unsuitable for carrying.
Japanese Utility Model Publication No. 2-12883

  The present invention solves the above-described problem, and can be configured so that it does not easily fall over when it is erected with the top of the cap as the bottom without providing unnecessary weight on the cap and increasing the weight of the entire writing instrument. It is intended to provide a stand-type writing instrument excellent in portability.

The present invention is a stand-type writing instrument that can be erected with the top of the cap as a bottom surface, and the center of gravity of the entire writing instrument is located up to 50% of the total length from the top of the cap with the cap mounted on the writing instrument body. And
Furthermore, it is a stand-type writing instrument that can be erected with the top of the cap as a bottom surface, and the writing instrument body is required to have a center of gravity of the writing instrument body within 50% of the total length from the tip of the pen tip.
Furthermore, it is a stand-type writing tool that can be erected with the top of the cap as the bottom surface with the cap attached to the writing instrument body, where the maximum outer diameter of the cap top is D, and the distance from the top of the cap to the center of gravity of the entire writing instrument is L When doing so, it is required to satisfy the relationship of L / D ≦ 1.5.
Furthermore, the overall length when the cap is mounted is 120 mm or less, the overall length of the cap is 30 mm or less, and the writing instrument body has a metal front shaft provided with a tip hole protruding outward from the pen tip. The metal front shaft occupies 30% or more of the entire writing instrument weight.
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 can be stably held in the standing state.

  According to the second aspect of the present invention, the writing instrument can be stably held in the standing state without being influenced by the weight of the cap, and the weight balance at the time of writing is excellent.

  According to the third aspect of the present invention, even when the entire writing instrument is tilted at the time of standing, it is easy to return to the state where the top of the cap becomes the bottom without falling down, so that it is difficult to fall down.

  According to the fourth aspect of the present invention, the center of gravity is relatively lowered, so that the sense of stability in the standing state is higher.

  According to the fifth aspect of the present invention, the sense of stability of the cap itself is increased, and the cap is more difficult to fall in the standing state.

  According to the sixth aspect of the present invention, the center of gravity of the entire writing instrument can be easily lowered and the decorative property is high.

  According to the seventh aspect of the present invention, high stability in the standing state can be obtained, and the pen tip can easily come into contact with the paper surface during writing.

  The stand-type writing instrument of the present invention includes at least a writing instrument main body including at least a shaft cylinder that stores ink and a pen tip, an opening that can be fitted to the writing instrument main body, and a top that becomes a bottom surface when standing. Consists of a cap.

The stand-type writing instrument is configured such that the center of gravity when the cap is fitted is located 50%, preferably 40% of the total length from the top of the cap (the bottom surface when standing). Thereby, it can hold stably in the standing state.
In particular, the total length when the cap is attached is 120 mm or less, preferably 100 mm or less. Since the center of gravity can be relatively lowered by setting the total length small, the sense of stability in the standing state is higher.

  The stand-type writing instrument satisfies L / D ≦ 1.5, where D is the maximum outer diameter of the cap top and L is the distance from the top of the cap to the center of gravity of the writing instrument (the center of gravity when the cap is fitted). Set to By forming the distance between the two locations so as to satisfy the above relational expression, even if the writing instrument is entirely inclined when standing, it is easy to return to the state where the top of the cap becomes the bottom surface, so that it is difficult to fall over. It becomes.

The writing instrument main body is composed of at least a shaft cylinder containing ink and a pen tip, and can be used in the form of a general-purpose ballpoint pen or marking pen without any particular limitation on the structure or shape.
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.

  The center of gravity of the writing instrument body is preferably located at 50%, preferably 40% of the total length from the tip of the pen tip. Thereby, the writing instrument can be stably held in the standing state without being influenced by the weight of the cap. In addition, since the center of gravity is located in front of the writing instrument (on the pen tip side), the weight balance during writing is excellent.

The writing instrument is preferably provided with a metal front shaft (base) provided with a tip hole protruding outward from the pen tip. In particular, the metal front shaft is 30% or more, preferably 40% or more of the entire weight of the writing instrument. It is more preferable to set so as to occupy. The metal front shaft is made of iron, brass, stainless steel or the like.
The front shaft can easily lower the center of gravity of the writing instrument body and the entire writing instrument, and has high decorativeness. Further, since the pen tip easily comes into contact with the paper surface during writing, writing with light writing pressure is possible.

The cap seals and protects the pen tip of the writing instrument main body, and includes an opening that can be fitted into the writing instrument main body and a top that becomes a bottom surface when standing. Particularly, when the total length of the cap is 30 mm or less, the stability of the cap itself is increased, so that it is more difficult to fall down in the writing instrument standing state.
Of the top of the cap, the part that contacts when standing (i.e., the part that supports the entire writing instrument) is not limited to a plane as long as it can stably contact the plane of a desk or the like when standing, Various shapes such as those provided with a plurality of protrusions can be used. Further, the outer edge shape of the top portion (that is, the outer edge shape when viewed from above the top portion) is not particularly limited as long as it can be erected, but in order to obtain higher stability, a regular polygon or a substantially circular shape. It is preferable that

Embodiments of the present invention will be described with reference to the following drawings.
FIG. 1 is an external view of the stand-type writing instrument of the present invention when standing, and FIG. 2 is an external view of the writing instrument body.

  The stand-type writing instrument 1 is fitted to a writing instrument body 2 that houses a ballpoint pen refill in a shaft cylinder composed of a body part (rear shaft) 21 and a base (front shaft) 22, and the pen tip 23 side of the writing instrument body 2. And a cap 3 that can be erected.

The body portion 21 constituting the writing instrument body 2 is a hollow molded product (specifically, a polycarbonate resin molded product) made of a synthetic resin such as PP resin, PC resin, PS resin, or PET resin, and has a full length (screw portion). Is set to 75 mm. The metal base 22 (specifically, made of brass) that is screwed in front of the body portion 21 is set to have a total length of 17 mm and a weight of 4.5 g.
A ball pen refill containing an ink composition and an ink follower is disposed in an ink storage tube provided with a ballpoint pen tip in a shaft cylinder composed of the body portion 21 and the base 22, and the entire length of the writing instrument body 2 ( The distance from the tip of the pen tip 23 to the rear end of the body portion 21) is set to 90 mm.
The writing instrument body 2 has a structure in which the distance M from the tip of the pen tip 23 to the center of gravity B of the writing instrument body 2 is 30 mm and has a center of gravity in the front (a distance of 30% of the total length from the pen tip side). It has an excellent weight balance and can be written with low writing pressure.

The cap 3 is a resin molded product having a height of 20 mm, in which one end is a circular top 31 that can be erected and the other end is an opening that accommodates a pen tip seal member.
The top portion 31 is formed in a trumpet shape so that the outer diameter D of the bottom surface (that is, the maximum outer diameter of the top portion 31 that contacts the support surface when standing) is an annular contact surface of 25 mm.
By setting it as the said form, it becomes a thing with a high stability, without adding a weight.

The stand-type writing instrument 1 comprising the cap 3 and the writing instrument body 2 has a total length of 97 mm when the cap is mounted, and a distance L from the cap top 31 to the center of gravity A is 33 mm. The total weight of the writing instrument 1 is 10 g.
In the stand-type writing instrument 1, the outer diameter D (25 mm) of the cap top 31 and the distance L (33 mm) from the cap top 31 to the writing tool gravity center A is L / D = 1.32, which is smaller than 1.5. It is set to be. Therefore, even if the writing instrument 1 as a whole is tilted at the time of standing, it is easy to return so that the cap top portion 31 becomes the bottom surface, so that it is difficult to fall down.
Moreover, since the weight of the base 22 occupies 45% of the weight of the entire writing instrument 1 and the center of gravity of the writing instrument main body 2 is located in the front, the cap 3 is provided with a stability without applying a load for preventing the fall. A high stand-type writing instrument can be constructed. Therefore, it becomes excellent in portability.

It is an external view which shows one Example of the stand type writing instrument of this invention. It is an external view of a writing instrument main body.

Explanation of symbols

1 Stand-type writing instrument 2 Writing instrument body 21 Body (rear shaft)
22 Base (front shaft)
23 Nib 3 Cap 31 Top A Center of gravity B of the stand-type writing instrument B Center of gravity of the writing instrument D Maximum distance of the top of the cap L Distance from the top of the cap to the center of gravity A Distance from the nib to the center of gravity B

Claims (7)

  A stand-type writing instrument that can be erected with the top of the cap as a bottom surface, and the center of gravity of the entire writing instrument is located from the top of the cap to 50% of the total length with the cap attached to the writing instrument body. Writing instrument.   A stand-type writing instrument capable of being erected with a cap top as a bottom surface, wherein the center of gravity of the writing instrument main body is located within 50% of the total length from the tip of the pen tip.   A stand-type writing instrument that can be erected with the cap on the bottom with the cap attached to the writing instrument body, where the maximum outer diameter of the cap top is D and the distance from the cap top to the center of gravity of the entire writing instrument is L , L / D ≦ 1.5 satisfying the relationship, a stand-type writing instrument.   The stand-type writing instrument according to any one of claims 1 to 3, wherein a total length when the cap is attached is 120 mm or less.   The stand-type writing instrument according to any one of claims 1 to 4, wherein the total length of the cap is 30 mm or less.   The stand-type writing instrument according to any one of claims 1 to 5, wherein the writing instrument main body has a metal front shaft provided with a tip hole protruding outward from the pen tip. The stand type writing instrument according to claim 6, wherein the metal front shaft occupies 30% or more of the entire weight of the writing instrument.

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