JPH11277976A - Plug body of writing utensil or the like - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable air to a pass through to avoid risks such as suffocation, even when a bady happens to swallow a plug body detached from a barrel or a cap by mistake, whichever side of the plug body may enter inside first and have it caught in the throat. SOLUTION: In the plug body for a writing utensil such as a tail plug 9 fixed to the rear end of a barrel 1 of the writing utensil or the like, or a top crown 5 or the like fixed to the rear end of a cap fitted to the tip of the writing utensil or the like, the dimensions of the plug body in the outer peripheral direction and the axial direction are almost the same and an air hole 12 opened at almost both ends in the axial direction is provided. At the same time, a circumferential recessed part 11a is formed on the outer periphery of the fixed part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a writing instrument such as a tail plug fixed to the rear end of a shaft cylinder such as a writing instrument or a crown attached to the tip of a writing instrument. Related to plugs.

[0002]

2. Description of the Related Art Conventionally, most caps fastened to the distal end of a writing instrument or the like have an inner hole closed except for the insertion side. However, accidents such as accidentally swallowing the cap and clogging the throat, resulting in suffocation may occur. Under the situation where it hangs, if the infant accidentally swallows the cap,
Caps have been proposed by various means that allow air to pass through even in the throat and avoid dangers such as suffocation.

[0003]

At present, caps (ventilation caps) having ventilation holes have been applied to various objects such as toys, cosmetics, medical containers and the like in addition to writing instruments. or,
A tail plug may be fixed to the rear end of a shaft cylinder such as a writing implement, or a crown may be fixed to the rear end of a cap such as a writing implement for design reasons. Further, although a plug such as a tail plug or a crown is firmly fixed to the barrel or the cap, there is a possibility that the plug may come off intentionally or carelessly. Therefore, it has been practiced to provide a vent in such a plug. In many cases, such plugs such as tail plugs and crowns have to be substantially the same in the axial direction with respect to the outer peripheral dimensions. In this case, if the infant swallows the plug, the plug may be swallowed in a direction perpendicular to the axis. Therefore, it is not completely safe to use only the ventilation means in the axial direction. The purpose of the present application is to make such a plug more secure.

[0004]

In order to achieve the above-mentioned object, a plug such as a writing instrument according to the present invention is fitted to a tail plug fixed to the rear end of a shaft cylinder such as a writing instrument or a tip of a writing instrument. In a plug body such as a writing instrument such as a crown which is fixed to the rear end of the cap, the plug body has substantially the same axial dimension as the outer circumferential direction, and has ventilation holes opened at substantially both ends in the axial direction. In addition, a circumferential concave portion is formed on the outer periphery of the fixed portion.

[0005]

1 and 2 show an embodiment of the present invention. The crown 5 shown in FIG. 1 has a dimension in which the entire length of the crown 6 at the rear end is approximately similar to that of the rear end. The fixing portion 7 in front of the flange 6 is fixed to the inner hole of the cap by press-fitting or the like with the crown 5 in contact with the substantially rear end of the cap 4. Further, the crown 5 is provided with a ventilation hole 8 at the axial center portion, which is provided at the front and rear ends.
A peripheral concave groove 7a is formed in the rear outer peripheral portion of.

The tail plug 9 shown in FIG. 2 has a size that is substantially similar in overall length to the outer circumference of the rear flange 10. With the tail plug 9 in a state in which the flange 10 is in contact with the rear end of the barrel 1, the fixing portion 11 in front of the flange 6 is fixed to the bore of the barrel by press fitting or the like. Also, tail plug 9
A vent hole 12 is provided at the axial center portion at the front and rear ends, and a circumferential groove 11 a is formed in the outer peripheral portion of the fixed portion 11.

FIGS. 3 and 4 show a conventional example.

[0008]

The construction of the present invention is as described above. In the event that the plug is swallowed from the axial direction, air can be circulated through the vent holes that have passed through both ends. When swallowed from the direction perpendicular to the axis, air can flow through the recess.

[0009]

The construction and operation of the present invention are as described above. Even if the plug is accidentally swallowed by an infant and clogged in the throat, the air is ventilated in either the axial direction or the direction perpendicular to the axial direction. This makes it possible to avoid a crisis such as suffocation.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention on a cap side.

FIG. 2 is a sectional view showing one embodiment of the present invention at the rear end side of the barrel.

FIG. 3 is a cross-sectional view showing a conventional example on a cap side.

FIG. 4 is a sectional view showing a conventional example on the rear end side of a barrel.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Shaft barrel 2 Refill of ballpoint pen 3 Cap 4 Cap 5 Crown 6 Flange 7 Fixing part 7a Concave part 8 Vent hole 9 Tail plug 10 Flange part 11 Fixing part 11a Concave part 11b Fitting protrusion 11c Fitting protrusion 12 Vent hole 13 Cap 14 Tail plug

Claims (1)

[Claims] 1. A plug body such as a tail plug fixed to a rear end of a shaft cylinder such as a writing instrument or a writing instrument such as a crown fixed to a rear end of a cap fitted to a tip of a writing instrument or the like, The plug has substantially the same dimension in the outer peripheral direction and the axial direction, is provided with a ventilation hole that is opened at substantially both ends in the axial direction, and has a circumferential concave portion formed on the outer periphery of the fixing portion. Plugs such as writing implements.