JP2539296Y2 - Cap writing instrument - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cap-type writing instrument capable of preventing damage to the surface of a barrel cylinder due to attachment and detachment of a cap and peeling of printing, painting and the like.

[0002]

2. Description of the Related Art Conventionally, in order to upgrade a writing instrument, a surface of a barrel is provided with a pattern by silk printing or a multicolor coating by painting. However, particularly in the case of a cap-type writing instrument, there is a problem that the attachment or detachment of the cap damages the printing or painting on the surface of the barrel and causes an accident such as peeling. Conventional means of solving such problems have included chamfering the opening edges of the cap and increasing the thickness of the printed or painted film. According to such means, there is an effect that the damage to the shaft cylinder surface due to the opening edge of the cap can be prevented for the time being. However, what damages the surface of the barrel by the attachment and detachment of the cap is not limited to the opening edge of the cap, but the same applies to the inner surface of the cap. In particular, when the outer surface of the cap is painted, the paint wraps around and adheres to the inner surface, causing unevenness due to the paint. Or, the printed or coated film was often peeled off. Further, in the case of a metal cap, if the surface treatment of the inner surface is incomplete, corrosion occurs, and unevenness due to the corrosion occurs, and the surface of the barrel tends to be more easily damaged.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide a new cap which can prevent the inner surface of the cap from being corroded at the same time as the surface of the barrel is not damaged or the printing or coating film is not peeled off by attaching and detaching the cap. To provide a simple cap-type writing instrument.

[0004]

In order to achieve the above object, a cap-type writing instrument according to the present invention has a lubricant applied to an inner surface of a cap having a chamfered opening edge detachably attached to a shaft barrel of the writing instrument. It is characterized by the following.

[0005]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an embodiment of the present invention.
FIG. 1 is a longitudinal sectional view of a cap 1, which is composed of an outer cylinder 2 and an inner cylinder 3, in which the inner surface of the metal outer cylinder 2 is further coated on the surface of a coating film (not shown). A non-volatile lubricant such as silicone oil is applied. In the figure, reference numeral 4 denotes a lubricant coating film. FIG. 2 shows a state in which the cap 1 is attached to the tip end of the writing implement barrel 5, and a thin lubricant is applied to the inner surface of the outer barrel 2 (in FIGS. 2 and 3, the lubricant applied film 4 is (Not shown) does not adhere to the grip portion 5a of the barrel 5, so that there is no problem that it becomes slippery during writing. FIG. 3 shows a state in which the inner surface of the cap 1 is in contact with the painted surface of the barrel 5 when the cap is attached to or detached from the rear end of the barrel 5. The inner surface of the cap 1 and the surface of the barrel 5 are shown. Are in contact with each other via a lubricant, so that the friction between the two is extremely small, and the accident that the surface of the barrel 5 is damaged or the coating film is peeled off disappears. The cap 1 is, of course, chamfered at the opening edge.

[0006]

The present invention is configured as described above, and the lubricant applied to the inner surface of the cap lowers the friction coefficient between the inner surface of the cap and the surface of the shaft cylinder, so that the two smoothly come into contact with each other. In addition, the peeling of the film at the time of printing or painting can be prevented, and there is an effect that the surface of the barrel can be maintained long and beautiful. Also, incomplete surface treatment of the inner surface of the cap has caused corrosion, but the lubricant coating film of the present invention can also play a large role in preventing such corrosion. Also, in the present invention, since the opening edge of the cap is chamfered, even if the opening edge contacts the barrel, the barrel is not damaged. Further, the lubricant coating film formed on the inner surface of the cap according to the present invention has an advantage that it is not necessary to enlarge the inner diameter of the cap because it is extremely thin.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a cap.

FIG. 2 is a cross-sectional side view of a part of a state in which a cap is mounted on a distal end of a barrel.

FIG. 3 shows the inner surface of the cap and the front of the barrel when the cap is attached and detached at the rear end of the barrel.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cap 2 Outer cylinder 3 Inner cylinder 4 Lubricant coating film 5 Shaft cylinder 5a Handle part of a shaft cylinder

Claims (1)

(57) [Scope of request for utility model registration] 1. A cap-type writing implement characterized in that a lubricant is applied to an inner surface of a cap having a chamfered opening edge detachably attached to a shaft cylinder of the writing implement.