JPH10166785A - Cap for writing instrument or the like - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a safe cap by providing bulged parts on outer peripheries of the cap substantially both axial ends, forming recesses of spaces between the bulged parts, and forming a vent hole for communicating an insertion port for clamping a front end with a rear end. SOLUTION: Bulged parts 2, 3 of overall circumferences are provided on outer peripheries of a cap 1 substantially both axial ends, and a recess 1b of a space is formed between the parts 2 and 3. An inner cap 8 is formed forward of the rear end 5 of an inner hole of the cap 1. The cap 8 is connected from its outer periphery to a circumferential wall of the hole of the cap 1 by a rib 7, and an air flow passage connected from an insertion port 1a of the cap 1 to the rear end of the cap via a vent hole 6 formed between the ribs is formed. Thus, even when the cap is swallowed, the air flows from the vent hole for its safety.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cap having a ventilation hole fastened to a tip of a writing instrument or the like.

[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. Most ordinary caps have a sufficiently long dimension in the axial direction with respect to the outer peripheral dimension, and the ventilation means are provided only in the axial direction. However, in some cases, the dimensions in the axial direction are almost the same as those in the outer periphery due to design. Specifically, there is one that corresponds to a knock cover such as a mechanical pencil. Such short caps 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 short caps more secure.

[0004]

SUMMARY OF THE INVENTION In order to achieve the above object, a cap for a writing instrument or the like according to the present invention does not have a projecting portion such as a clip, and has substantially the same dimensions in the outer peripheral direction and the axial direction as a writing instrument or the like. In the short cap fastened to the tip, the cap is provided with a full bulge or a partial bulge at least on the outer peripheral portions at substantially both ends in the axial direction. A concave portion of a space is appropriately formed between the bulging portions, and further, a ventilation hole communicating from an insertion port for fastening a tip portion of a writing instrument or the like to a rear end portion is provided, for example, a cap is swallowed in a direction perpendicular to the axis. Even if it is ventilated, ventilation is possible.

[0005]

1 and 2 show a first embodiment of the present invention. The cap 1 is a short cap that does not have a projecting portion such as a clip, has substantially the same dimension in the outer peripheral direction and the axial direction, and is fastened to the tip of a writing instrument or the like. Further, the cap 1 is provided with bulging portions 2 and 3 having a full circumferential shape at outer peripheral portions at substantially both ends in the axial direction, and a concave portion 1b of an appropriate space is provided between the bulging portions.
Are formed. The cap 1 has an inner cap 8 having a small cylindrical shape with a bottom in front of the rear end 5 of the inner hole. The inner cap 8 is connected between the outer peripheral portion and the inner wall of the cap by radial ribs 7 provided at required places, and the cap is inserted by the ventilation holes 6 formed between the ribs. An air flow passage extending from the mouth 1a to the rear end of the cap is formed. The cap 1 is usually formed of an integral resin molded product in the above-described configuration, and the bulging portions are provided at least at both ends in the axial direction, and are provided at intermediate portions as necessary. The outer peripheral shape of the cap and the outer peripheral shape of the bulging portion are not limited to circular.

FIGS. 3 and 4 show a second embodiment of the present invention. Hereinafter, only differences from the first embodiment will be described. Protrusions 11 and 12 are provided at a plurality of locations on the outer periphery at substantially both ends in the axial direction of the cap 10, and grooves 11 a and 11 b are respectively provided between the protrusions. I have. It is not always necessary that the protrusions of the bulging portions 11 and 12 coincide with each other in number and coaxially.

FIGS. 5 and 6 show a third embodiment of the present invention. The difference from the first embodiment is that there is no inner cap, and a vent hole 22 is formed at a required portion of the rear end 21. This cap is applied to a knock cover such as a mechanical pencil.

FIGS. 7 and 8 show a fourth embodiment of the present invention. The difference from the first embodiment is that an elastic body 33 made of, for example, a non-liquid-absorbing rubber material is provided in the inner hole of the inner cap 31 of the cap 30. This cap is applied, for example, as a cap for sealing the tip of an aqueous ballpoint pen.

[0009]

The structure of the present invention is as described above. In the event that the cap is swallowed from the axial direction, air can flow through the vent hole that has come out from the insertion port to the rear end. Further, when swallowed from the direction perpendicular to the axis, air can flow through the recess formed between the bulging portions.

[0010]

The construction and operation of the present invention are as described above. Even if a short cap is accidentally swallowed by an infant and clogged in the throat, the cap remains in either the axial direction or the direction perpendicular to the axis. Since ventilation is also possible, a crisis such as suffocation can be avoided.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a cap such as a writing instrument according to a first embodiment of the present invention.

FIG. 2 is a top view of FIG.

FIG. 3 is a longitudinal sectional view showing a cap such as a writing instrument according to a second embodiment.

FIG. 4 is a top view of FIG.

FIG. 5 is a longitudinal sectional view showing a cap such as a writing instrument according to a third embodiment.

FIG. 6 is a top view of FIG.

FIG. 7 is a longitudinal sectional view showing a cap such as a writing instrument according to a fourth embodiment.

FIG. 8 is a top view of FIG. 7;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 cap 1a insertion opening 1b recess 2 bulge 3 bulge 4 locking part 5 rear end 6 ventilation hole 7 rib 8 inner cap 9 vertical rib 10 cap 11 bulge 11a groove 12 bulge 12a groove 13 concave DESCRIPTION OF SYMBOLS 20 Cap 21 Rear end 22 Vent hole 30 Cap 31 Inner cap 32 Rib 33 Elastic body

Claims (4)

[Claims] 1. A short cap which does not have a projecting portion such as a clip and has substantially the same dimension in the outer peripheral direction and the axial direction and is fastened to a tip portion of a writing instrument or the like. A bulge is provided on the entire circumference or a part of the circumference on the outer periphery at substantially both ends in the direction, and a concave portion of an appropriate space is formed between the bulge and the bulge. A cap, such as a writing instrument, provided with a vent hole communicating from an insertion port for fixing the portion to a rear end portion. 2. An inner cap is provided on a rear end inner hole side of the cap, and an outer periphery of the inner cap and an inner periphery of the cap are connected by a rib at a required portion, and a cap is provided between the ribs. 2. The cap for a writing instrument or the like according to claim 1, wherein a ventilation hole is formed from the inner hole to the rear end portion. 3. The cap for a writing instrument or the like according to claim 1, wherein a ventilation hole is formed at a required position at a rear end of the cap. 4. The cap for a writing instrument or the like according to claim 2, wherein an elastic body is provided in an inner hole of the inner cap.