JP2004148720A - Writing implement - Google Patents

Abstract

An object of the present invention is to provide a writing implement in which an arbitrary surface of a shaft cylinder is always substantially on the upper surface while the writing implement is left on a horizontal plane.
A writing instrument in which a writing body is disposed in a barrel and a projection for preventing rotation is integrally formed or attached, wherein the projection is in contact with a horizontal plane, and With respect to the perpendicular from the contact point, the position of the center of gravity in the radial direction of the writing instrument is set to a position facing the protrusion with respect to the perpendicular, so that the writing instrument is always left on a horizontal plane, and the detent is always used for the detent. The projection is substantially on the upper surface.
[Selection diagram] Fig. 1

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a writing implement in which an arbitrary surface of a barrel always has a substantially upper surface when the writing implement is left on a horizontal plane.
[0002]
[Prior art]
[Patent Document 1]
"JP-A-10-217676"
[Patent Document 2]
"JP-A-11-24563"
[0003]
[Prior art]
In a writing instrument such as a ballpoint pen, since the ballpoint pen refill is disposed in a substantially cylindrical barrel, the writing barrel is stopped while being left in a state where the writing instrument is left on a horizontal surface, for example, a desk or the like. I have. When a force is applied in a direction parallel to the horizontal plane when the apparatus is left as it is, the apparatus rotates and stops until the force is consumed by gravity or its own weight.
[0004]
In such a writing instrument, a projection is formed on the outer peripheral surface of the barrel, or a clip member is provided, so that even when the barrel is rotated, the projection and the clip member abut on a horizontal plane, thereby preventing rotation of the barrel. can do.
[0005]
By the way, in general, a product name or a maker name is displayed on the outer peripheral surface of the barrel of a writing instrument by printing or the like. Although this display surface is set arbitrarily, those provided with a clip member are displayed on the clip member.
[0006]
[Problems to be solved by the invention]
However, as described above, in a state where the writing implement is left on a horizontal surface, for example, on a desk or the like, the standing state or a state in which the barrel is rotated and the projection or the clip member abuts on the horizontal plane, so that the writing implement is not stationary. There is a problem that the display surface of the product name or the manufacturer name displayed on the outer peripheral surface of the barrel by printing or the like does not come to the upper side.
[0007]
In particular, when arranging writing instruments in a display case or a store, if the clip position and the display surface are different, the appearance is inferior, and it is necessary to rearrange the writing tools so as to come to the upper surface so that the user can easily see it. Further, it is necessary to provide a partition or the like for each writing instrument so that the writing implements arranged once do not rotate.
[0008]
In view of the above problems, the present inventor has an object to provide a writing implement in which an arbitrary surface of the barrel always comes to substantially the upper surface while the writing implement is left on a horizontal plane.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a writing instrument in which a writing body is disposed in a shaft cylinder, and a projection for rotation prevention is integrally formed or attached, in a state where the projection is in contact with a horizontal plane. With respect to the perpendicular from the contact point of the shaft cylinder with the horizontal plane, the center of gravity position of the writing implement in the radial direction is set to a position facing the protrusion with respect to the perpendicular, so that the writing implement is left on the horizontal plane. The rotation-preventing projection is always substantially on the upper surface.
[0010]
Further, the projection is a clip member.
[0011]
Further, a pattern and / or a character is provided on a surface which is always substantially the upper surface of the barrel.
[0012]
Further, the outer peripheral surface of the shaft cylinder facing the radial direction of the projection is made flat.
[0013]
The surface that is always substantially the upper surface of the shaft cylinder in the present invention is the surface of the shaft cylinder that forms the protrusion, and the shaft that is also substantially the upper surface when the rotation preventing protrusion is substantially the upper surface. It is the surface of the cylinder or the surface of the protrusion.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described with reference to the drawings. The writing instrument 1 according to the first embodiment shown in FIGS. 1 to 5 has a knocking body having a cam portion (not shown) at a front end thereof so that the rear shaft 3 projects outside a rear end 3a of the rear shaft. 4, and the rotating cams 5 are sequentially arranged so that the projections of the rotating cams 5 engage with cam grooves (not shown) formed in the rear shaft 3.
[0015]
Further, a shear-thinning ink (not shown) is directly packed and housed in the ink storing cylinder 6 in the front shaft 2, and a pen point portion 8 composed of a ball-point pen tip having a ball rotatably held at the tip thereof. Is mounted via a chip holder 7, and a ball-point pen refill 10 having a tail plug 9 at a rear end is slidably urged by a coil spring 11 toward the rear end of the front shaft 2. A grip member 14 is provided integrally with the front shaft 2, and the front shaft 2 and the rear shaft 3 are screwed R to obtain the writing implement 1.
[0016]
By pressing the knock body 4, the writing body retracting mechanism by the rotating cam 5 operates, the ball-point pen refill 10 moves forward against the resilience of the coil spring 11, and the pen tip 8 moves as shown in FIG. It can protrude from the front end opening 2a of the front shaft 2 and maintain the state so that writing is possible.
[0017]
In the rear shaft 3, as shown in FIG. 4, the weight member 12 is attached by bonding so that a line extending from the center K of the clip member 13 to the axis J and the center of gravity G work in a straight line. The state where the clip member 13 faces the upper surface with respect to the horizontal plane is maintained. When the balance is lost due to some external force, the writing implement 1 is tilted. However, since the clip member 13 serving as a projection of the detent is integrally formed on the rear shaft 3, the clip member 13 is in a horizontal plane. Stop by contact.
[0018]
At this time, as shown at 1-1 in FIG. 5, the center of gravity G of the writing instrument 1 in the radial direction with respect to the perpendicular S from the contact point T with the horizontal plane H of the rear shaft 3 is positioned with respect to the perpendicular S by the clip member 13. The weight member 12 is disposed at a position (outside of the vertical line S) opposite to. As a result, the force (arrow W) from the center of gravity G acts as a return force in the opposite direction of the fall, and returns to the state where the clip member 13 faces the upper surface (1-3 in FIG. 5). Although not shown, characters are printed on the front surface 13a of the clip member 13.
[0019]
By the way, when the return speed is actually high, since the shaft cylinder is formed in a cylindrical shape, it passes through the return state and tilts to the opposite side. While repeating such tilting, the clip member returns to a state in which the clip member faces the upper surface with respect to the horizontal plane.
[0020]
Further, as shown by the imaginary line L in FIG. 4, the state in which the clip member 13 faces the upper surface is stabilized by flattening the outer peripheral surface of the rear shaft 3 that faces the clip member 13 in the radial direction. It is preferable because it can be maintained.
[0021]
In the present embodiment, for the sake of convenience, the position of the center of gravity of the writing implement is adjusted by disposing the weight member, but the position of the center of gravity is adjusted by the material and thickness of the components constituting the writing implement, or the arrangement position. You may. Further, in the present embodiment, a knock-type writing instrument using a rotary cam is illustrated for convenience, but a writing instrument having another retracting mechanism, a cap-type instrument, or the like can be used without particular limitation. The method of disposing the weight member is not particularly limited as long as the weight member is attached so as not to move by a knocking operation, a rolling operation, or the like, such as bonding or fitting.
[0022]
The ink for writing implements used in the present invention is not particularly limited. Further, the writing implement of the present invention is not particularly limited, such as a knocking type, a cap type, etc., but as described above, a writing instrument with a clip or a product name or a maker name is printed on the outer peripheral surface of the barrel. In such a case, the effect of the present invention is particularly remarkable.
[0023]
【The invention's effect】
Since the knock-type writing instrument of the present invention has the above-described configuration, it is possible to provide a writing instrument in which an arbitrary surface of the barrel is always substantially on the upper surface while the writing instrument is left on a horizontal surface.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing a writing instrument according to a first embodiment.
FIG. 2 is a diagram showing a state in which a pen tip is protruded in FIG. 1;
FIG. 3 is an enlarged sectional view of a main part in FIG.
FIG. 4 is a sectional view taken along line AA in FIG.
FIG. 5 is a state diagram showing a returning state of the writing instrument according to the first embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Writing implement 2 Front shaft 2a Tip opening 3 Rear shaft 3a Rear end 4 Knock body 5 Rotating cam 6 Ink storage cylinder 7 Tip holder 8 Pen tip 9 Tail plug 10 Ballpoint pen refill 11 Coil spring 12 Weight member 13 Clip member 14 Grip member G Center of gravity H Flat surface S Vertical line T Contact

Claims (4)

In a writing instrument in which a writing body is disposed in a barrel, and a projection for preventing rotation is integrally formed or attached, in a state where the projection is in contact with a horizontal plane, a contact point with a horizontal plane of the barrel is provided. With respect to the perpendicular, the center of gravity position of the writing instrument in the radial direction is set to a position facing the projection with respect to the perpendicular, so that the writing implement is left on a horizontal plane, and the rotation preventing projection is always substantially Writing implement characterized by being on the top. The writing instrument according to claim 1, wherein the projection is a clip member. The writing implement according to claim 1, wherein a picture and / or a character is provided on a surface which is always substantially the upper surface of the barrel. The writing instrument according to any one of claims 1 to 3, wherein an outer peripheral surface of the shaft cylinder facing the radial direction of the projection is flattened.

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