JPH082173A - Cap for writing instrument - Google Patents

Abstract

PURPOSE:To improve the sense of beauty of a cap without reducing the visibility of the type and the color of a nib member by forming an uneven part at the position of the sidewall of the cap corresponding to the member. CONSTITUTION:A writing instrument A comprises a writing instrument body B having a barrel 1, an ink occlusion material 2, a nib member 3 and an end member 4, and a cap C engaged with the body B to cover the member 3. A rolling preventive protrusion 9 having a communicating hole is formed at the sidewall of the cap C, and has a nib member visible part 10 of the nib member corresponding position when mounted at the body B. In this case, a plurality of longitudinal narrow grooves 11 are formed on the sidewall including the part 10. Thus, a light is refracted and reflected at random, hence the original shape of the member 3 is not observed, but its contour is observed to be waved. In this manner, the sense of beauty of the cap C can be improved without reducing the visibility of the type and the color of the member 3 as much as possible.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is a transparent or semi-transparent synthetic resin cylindrical member which is detachably attached to a writing instrument body while covering a pen tip member formed at the tip of the writing instrument body. Regarding writing tool caps, especially a pen with a relatively thick and large handwriting using a pen tip member such as a fiber bundle such as polyester or polyamide, a foamed resin such as urethane, or a stick made of synthetic resin that connects the ink passages inside. The present invention relates to a writing instrument cap that covers a tip member.

[0002]

2. Description of the Related Art It is known that a design problem of a product is important as a requirement to sell the product. Various shapes and colors are adopted for products lined up in the market,
It appeals to consumers' purchasing consciousness. Among them, the writing instruments are designed in various ways because they are used by children and adults alike.

There is a writing instrument that employs a transparent or semi-transparent cap to indicate the type of pen tip. For a writing instrument that covers a pen point member by mounting a cap made of a transparent or translucent synthetic resin material, the material, the wall thickness of the molded article, and the like have been examined to make it easier to confirm the pen tip shape and handwriting.

[0004]

When the cap of the writing instrument is made of a transparent material, the design is aesthetically pleasing, and the type and shape of the pen tip member can be easily visually recognized.
However, if printing or the like is performed to improve the aesthetic appearance of the design, there is a problem in that the visibility of the type and shape of the pen tip member decreases. In particular, for a long pen point member such as a brush, there is a high probability that the pen point member will be hidden by printing or the like. An object of the present invention is to provide a cap for a writing instrument in which the aesthetics of the cap is improved without reducing the visibility of the type and color of the pen tip member as much as possible.

[0005]

That is, the present invention is a transparent or semi-transparent synthetic resin cylindrical object which is attached to and detached from a writing instrument body while covering a pen tip member formed at the tip of the writing instrument body. In the cap of a writing instrument that can be freely attached, a gist of the writing instrument cap is characterized in that a concavo-convex portion is formed at a position corresponding to a pen tip member which is a pen tip member visual recognition portion on a side wall of the cap.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An example of the present invention will be described below with reference to the drawings. FIG. 1 shows a sectional view of a main part of a writing instrument A having a cap of the present invention. The writing instrument A includes a barrel 1 and an ink occlusion body 2.
And a writing tool main body B composed of the pen tip member 3 and the tip member 4, and a cap C fitted to the writing tool body B and covering the pen tip member 3. A tip member that accommodates an ink occlusion body 2 composed of a fiber bundle body in which polypropylene is coated on polyester resin in the barrel 1 and has a longitudinal projection 4a for press-fitting a pen tip member 3 at the tip of the barrel 1. I am wearing 4. Four projections 4a are formed in parallel in a radial manner so as to suppress deformation of the pen tip member 3 and to secure an air communication path. The pen tip member 3 is formed by molding polyamide fiber with a urethane resin as a binder, and exposes the tip portion 3a and pierces the rear end of the ink occluder 2 with the ink occluder 2. The ink is communicated with the tip portion 3a. The ink stored in the ink storage body 2 is a fluorescent pigment ink.

An example of the ink composition will be given. Glycerin 17.0 parts Proxel GXL (preservative) 0.2 parts NKW3605 (fluorescent yellow pigment dispersion, manufactured by Nippon Fluorescent Chemical Co., Ltd.) 42.0 parts Ion-exchanged water 40.8 parts

The fluorescent coloring material used is NKW3
002, NKW3004, NKW3005, NKW30
07, NKW3008, NKW3077, NKW360
2, NKW3604, NKW3607, NKW360
8, NKW3677 (above, Nippon Fluorescent Chemical Co., Ltd.),
Cosmokara S-1000F series (manufactured by Toyo Soda Co., Ltd.) and the like can be mentioned, but dye inks or inks in which dyes and pigments are used in combination may also be used.

As shown in FIG. 2, which is a side view of the main part of the writing instrument A, the cap C is a cylindrical body formed by injection molding of transparent polypropylene, and has a pen tip member insertion hole 5 and a small cap attachment hole 6. Have Small cap mounting hole 6
Is a double-headed pen for fitting both caps to each other when pen tip members are attached to both ends of the shaft (not shown). Pen point member insertion hole 5
Is formed with a fitting portion 7 for the writing instrument body B,
It is fitted to the barrel 1. Also, cap C
On the side wall, a projection 9 for preventing rolling having a communication hole 8 is formed, and a pen tip member visualizing portion 10 which is a position corresponding to the pen tip member when attached to the writing instrument body B is provided. Here, a plurality of narrow grooves 11 in the longitudinal direction are formed on the side wall including the pen tip member visual recognition portion 10. This narrow groove 11
Instead of the longitudinal groove, the groove can also be a circumferential groove.

Since the pen tip member visual recognition portion 10 is formed with a plurality of longitudinal narrow grooves 11, refraction or irregular reflection of light occurs, the original shape of the pen tip member 5 cannot be seen, and the contour is wavy. Looks like it's hitting. In particular, in the case of a long pen whose diameter is reduced from a certain thickness to a thin tip portion toward the tip like the brush pen of this example, the narrow groove 11 and the pen tip member 5 are used.
The portion where the contour of the intersection intersects is the portion where the refraction and irregular reflection of light can be effectively seen. Particularly, when a fluorescent color ink is used, refraction and irregular reflection of light are more emphasized.

FIG. 3 shows another embodiment. The basic part is the same as the example shown in FIGS. 1 and 2, but the pen tip member visual recognition part 10 has an elliptical projection 12 instead of the narrow groove 11.
Are formed in plural. The elliptical shape of the protrusion is such that the major axis is parallel to the longitudinal direction and the minor axis is the circumferential direction. The projections and depressions are formed in the longitudinal direction as much as possible to secure as many utilization portions as possible where the contour of the pen tip member 5 intersects.

Besides the above, various modifications can be made without departing from the gist of the present invention. For example, the narrow groove 11
Alternatively, the uneven portion formed on the pen tip member visual recognition portion 10 shown as an elliptical projection 12 is formed on the inner wall of the pen tip insertion hole 5 in addition to the one formed on the surface of the cap C. Of course, in this case, the surface may have no unevenness, which is convenient when a part of the surface is printed. Further, the convex portions of the irregularities may be formed in a plurality of lenses.

[0013]

As described above, the cap of the writing instrument of the present invention is a transparent or translucent synthetic resin cylindrical object, and the writing instrument while covering the pen point member formed at the tip of the writing instrument body. In the cap of the writing instrument that is detachably attached to the main body, since the uneven portion is formed at the pen tip member corresponding portion which is the pen tip member visible portion on the side wall of the cap, the visibility such as the type and color of the pen tip member is maximized. The aesthetics of the cap can be improved without lowering.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part showing an embodiment of the present invention.

FIG. 2 is a side view of an essential part showing an embodiment of the present invention.

FIG. 3 is a side view of essential parts showing another embodiment.

[Explanation of symbols]

 A Writing implement B Writing implement main body C Cap 1 Shaft cylinder 2 Ink occlusion body 3 Pen tip member 3a Tip part 4 Tip member 4a Protrusion 5 Pen tip member insertion hole 6 Small cap mounting hole 7 Fitting part 8 Communication hole 9 Protrusion 10 Pen tip member Visual part 11 Fine groove 12 Protrusion

Claims (1)

[Claims] 1. A cap for a writing instrument, which is a transparent or semi-transparent synthetic resin cylindrical article, which is detachably attached to the writing instrument body while covering a pen tip member formed at the tip of the writing instrument body, A cap for a writing instrument, wherein an uneven portion is formed at a position corresponding to a pen tip member which is a pen tip member visible portion on a side wall of the cap.