JP2003072284A - Cap-type ball-point pen - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cap-type ball-point pen of a simple structure which enables an operation to attach and detach a cap and a barrel to be easily performed, with a wide range of design selections. SOLUTION: In the cap type ball-point pen with a cap mounted, in a freely attachable/detachable manner, at the tip part of a barrel, adopting either of an irregular face fitting action or a slide-over fitting action, the rear end part of the cap is located on the rear end side of a barrel, from its gripping part, and a through hole is opened at an opposite position to the gripping part of the barrel.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cap type ballpoint pen.

[0002]

2. Description of the Related Art Conventionally, a cap-type ball-point pen having a cap attached to the tip of a ball-point pen is well known, but the rear end of the cap is located rearward of the grip and covers the grip of the barrel. Well-known is a cap-type ballpoint pen having a structure.

[0003]

However, in the conventional structure, when the cap type ball-point pen is detachably mounted by the concave-convex fitting or the crossover fitting when the cap-shaped ballpoint pen is removed from the barrel, the cap-type ballpoint pen is fitted with the passage of time. It is a fact that the parts are worn and the fitting force with time decreases compared to the initial fitting force.
Therefore, since the initial fitting force is set high, there is a problem that it becomes difficult to attach and detach the cap and the barrel. In addition, a hard resin is generally used for a writing instrument cap, and the hand may slip when the cap is attached or detached due to the nature of such a material.

In order to solve the above-mentioned problems, the present inventors have studied to provide a cap for a writing instrument with an uneven portion on which a hand is caught. As a result, the present inventor has studied the attachment / detachment work of the cap, and as a result, when attaching / detaching the cap of the cap-type ball-point pen which is detachably attached by the concavo-convex fitting or the crossover fitting, hold the cap and hold the barrel Pull toward the rear end of the barrel, or pull the cap toward the tip of the barrel by holding the barrel, but it is easier to attach / detach with the position facing the grip of the barrel of the cap than holding the tip of the cap. It was also found that the present invention was achieved.

Further, conventionally, in order to improve the decorative effect of the cap design, the cap is colored or colored, but the three-dimensional decorative effect cannot be obtained, and there is still room for consideration as a real problem. is the current situation.

In view of the above problems, the present invention provides a cap-type ballpoint pen having a simple structure in which the cap and the barrel can be easily attached and detached and the design width is widened.

[0007]

In order to achieve the above object, according to the present invention, there is provided a cap type ball-point pen in which a cap is detachably attached to a tip end portion of a shaft cylinder by concavo-convex fitting or crossover fitting. The rear end portion of the cap is located on the rear end side of the grip portion of the shaft cylinder, and the through hole is formed at a position facing the grip portion of the shaft cylinder of the cap.

Further, the barrel is made of a transparent or semitransparent resin material.

In the present invention, the shape and size of the through hole formed in the cap are not particularly limited, but in order to make it easier for the cap to be caught during the attaching and detaching work of the cap, a certain size and / or a plurality of holes are formed. preferable.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to the drawings. The same reference numerals are given to the same members and the same parts that indicate the same parts. In the cap-type ballpoint pen 1 of the present invention, the shaft cylinder 2 is formed of an opaque resin such as polypropylene, polycarbonate, acrylonitrile styrene, etc., and the grip portion 3 is formed with an uneven portion for preventing slippage. A fitting hole (not shown) is provided at the tip of the tip holder 4, and a ballpoint pen tip 5 having a ball rotatably provided at the tip in the fitting hole.
Is attached. Insert the rear end of the chip holder 4 into the barrel 2
Is press-fitted into the tip portion 2a of the. A fitting protrusion 2c for fitting with a cap is formed at the tip of the barrel 2.

The shaft cylinder 2 is directly filled with an ink (not shown) for writing instruments, which is given shear thinning viscosity, and a grease-like follower which comes into contact with the rear end of the ink and follows the consumption of the ink. There is. In addition, the rear end portion 2b of the shaft tube 2
A tail plug 6 having an air hole that communicates the inside and the outside of the shaft cylinder 2 is inserted into the shaft cylinder 2 so that ink and followers do not fly out from the rear end portion 2b of the shaft cylinder.

The cap 7 is formed of an opaque resin such as polypropylene, polycarbonate, acrylonitrile styrene. In addition, a fitted projection 7b is provided in the cap 7 at a position corresponding to the fitting projection 2c formed on the shaft cylinder 2, and the fitting projection 2c of the shaft cylinder 2 and the fitting projection of the cap are fitted. Part 7
A cap 7 is detachably attached to the tip end of the barrel 2 by the crossover fitting of b. A clip 9 is formed integrally with the cap 7.

According to the present invention, when the cap 7 is mounted on the barrel 2, the rear end portion 7a of the cap is changed to the rear end portion 3a of the grip portion 3.
The through hole 8 is formed in the cap 7 at a position facing the grip portion 3 of the shaft tube 2 so that the through hole 8 is located rearward. The shape and size of the through hole 8 are not particularly limited. Further, the position where the through hole 8 is formed can be arbitrarily set as long as it is a position facing the grip portion 3 of the shaft tube 2. However, when the cap 7 has the clip 9, the cap 8 is gripped by hand at the time of attachment / detachment. Therefore, it is better to provide the clip 9 at a position where it does not get in the way, specifically, at a position deviated from the clip 9 by approximately 90 degrees.

In this embodiment, for convenience, a transparent or opaque resin such as polypropylene, polycarbonate or acrylonitrile styrene is used for the barrel 2, and an opaque resin such as polypropylene, polycarbonate or acrylonitrile styrene is used for the cap 7. Although not provided, the remaining amount of ink can be confirmed from the through hole 8 formed in the cap 7 by forming the shaft cylinder with a transparent or translucent resin material.

Further, in this embodiment, the ink having the shear thinning property and the grease-like follower which comes into contact with the rear end of the ink and follows the consumption of the ink are directly packed, but the type of the ink is limited. Not a thing. Further, in the present embodiment, the directly packed ball-point pen that directly stores the ink in the barrel is used, but a cap-type ball-point pen in which the ball-point pen refill that contains the ink for writing instruments is arranged in the barrel is also available. Good.

[0016]

According to the present invention, since the through hole is formed at a position facing the grip portion of the shaft cylinder of the cap, the through hole is caught by the hand when the cap is attached and detached. It was possible to provide a cap-type ballpoint pen that can be easily attached and detached.

When the cap and the barrel are different in color, the color of the barrel is exposed from the through hole formed in the cap, which gives a three-dimensional decoration effect. Further, when the shaft cylinder is made of a transparent or translucent resin material as in the invention described in claim 2, there is also an advantage that the remaining amount of ink can be visually checked.

[Brief description of drawings]

FIG. 1 is an external view showing a cap-type ballpoint pen of the present invention.

FIG. 2 is an external view showing a state in which the cap in FIG. 1 is removed.

FIG. 3 is an enlarged view of the cap in FIG.

4 is a vertical sectional view of the cap in FIG. 3 rotated by 90 degrees.

[Explanation of symbols]

1 cap Biaxial cylinder 2a Shaft cylinder tip 2b Shaft cylinder rear end 2c Mating protrusion 3 grip 3a Rear end of grip 4 chip holder 5 ballpoint pen tip 6 tail plugs 7 cap 7a Cap rear end 7b Mating projection 8 through holes 9 clips

Claims (2)

[Claims] 1. A cap-type ball-point pen in which a cap is detachably attached to the tip end of a shaft cylinder by concavo-convex fitting or overpass fitting, wherein the rear end of the cap is a rear end of a gripping part of the shaft cylinder. A cap-type ball-point pen characterized in that a through hole is formed at a position facing the grip portion of the shaft cylinder of the cap. 2. The cap-type ballpoint pen according to claim 1, wherein the barrel is made of a transparent or translucent resin material.