JP2580023Y2 - Caps for writing instruments - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to caps for makeup tools, correction tools, applicators, writing tools and the like. More specifically, an annular airtight portion is provided on the inner peripheral wall of the cap, an axial longitudinal groove is provided on the outer peripheral wall of the cap in front of the annular airtight portion, and the longitudinal groove communicates with the inside of the cap behind the annular airtight portion. The present invention relates to a cap such as a writing instrument provided with an air hole and provided with an air passage for preventing suffocation due to accidental ingestion.

[0002]

2. Description of the Related Art Conventionally, in a cap such as a writing instrument, for example, Japanese Utility Model Laid-Open Publication No. 3-57087, etc., a ventilation hole (lateral hole) is provided behind an annular airtight portion (close fitting portion). A cap, such as a writing instrument, is disclosed in which a hole (hole) communicates with a vertical groove (groove) formed on the outer periphery of the cap.

However, since the conventional cap has a structure in which the ventilation hole is opened directly to the vertical groove, if the infant or the like accidentally swallows the vertical hole, the vertical groove opened by the ventilation hole forms the tracheal inner wall or foreign matter. If the air passage is blocked by the air passage, the air passage may be blocked there, and a reliable air flow may not be obtained, resulting in insufficient safety.

Further, the conventional cap is almost formed by injection molding of a plastic material. As in the cap described in the above-mentioned publication, an uneven thickness such as a vertical groove is formed on the outer periphery of an annular airtight portion with the writing instrument body. When there is a portion (thickness variation portion), so-called sink marks are easily generated where irregularities are formed in the annular hermetic portion on the inner periphery. Therefore, when attached to the writing instrument body,
In some cases, the original function of maintaining the airtightness as a cap, that is, the function of preventing ink evaporation is not satisfied.

[0005]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems, and it is necessary to provide a reliable air flow even if an infant or the like accidentally swallows it, and to provide sufficient safety. Of course, when formed of a plastic material, it is an object of the present invention to provide a cap for a writing instrument or the like that does not cause sink marks in the hermetically sealed portion and maintains reliable airtightness with the writing instrument body.

[0006]

According to the present invention, an annular airtight portion 2 is provided on an inner peripheral wall of a cap 1, and a plurality of axial longitudinal grooves 3 are provided on an outer peripheral wall of a cap 1 in front of the annular airtight portion 2. A cap such as a writing implement provided with an air passage for preventing suffocation due to accidental ingestion, provided with a ventilation hole 5 communicating the longitudinal groove 3 and the inside of the cap 1 behind the airtight portion 2; 2 and an annular groove 4 is provided on the outer periphery.
The gist of the present invention is that the vent hole 5 is opened at the bottom, and the vent hole 5 and the vertical groove 3 communicate with each other through the annular groove 4.

[0007]

The air can be circulated in all the vertical grooves 3 by the annular groove 4. Therefore, even if one vertical groove 3 is closed by the inner wall of the trachea or foreign matter, the air can be circulated in the other vertical grooves 3. It is. Further, since the ventilation hole 5 is opened in the annular groove 4, there is no possibility that the ventilation hole 5 is blocked by the inner wall of the trachea. Therefore, even if an infant or the like accidentally swallows, an air passage from the opening of the cap 1 to the top is secured, and the suffocation accident can be reliably prevented.

Further, even when the cap is formed by injection molding using a plastic material, since there is no thickness variation due to the annular groove 4, sink is not generated in the annular hermetic portion 2, and the original hermetic function of the cap is satisfied.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.

FIGS. 1 to 3 show a first embodiment. The cap 1 is obtained by injection-molding a plastic material, and has an inner peripheral wall provided with an annular hermetic portion 2 having a smooth surface. On the outer peripheral wall of the cap 1 in front of the annular airtight portion 2,
A plurality of axial ribs 6 protrude radially from the axial center, and a vertical groove 3 is formed therebetween. An annular groove 4 is provided on the outer periphery of the annular airtight portion 2, and the annular groove 4 has four ventilation holes 5 communicating with the inside of the cap 1.

A stepped engaging portion 7 is provided on the outer peripheral wall of the top of the cap 1. In the double-headed writing instrument, the engaging portion 7 engages an opening of another cap,
Enables rear insertion of the cap during use.

FIG. 4 shows a second embodiment (a modification of the first embodiment, which corresponds to a sectional view taken along line AA of FIG. 1).
In the first embodiment, the ribs 6 protrude radially from the axis, but in the present embodiment, two vertical grooves 3 are formed by two sets of ribs 6 protruding radially outward in parallel. Are formed. Thus, even with a small number of ribs 6, it is possible to reliably form the longitudinal groove 3 that is not blocked by the inner wall of the trachea or the like.

FIGS. 5 and 6 show a third embodiment. A plurality of comb-shaped ribs 6 extending in the radial direction are provided on the outer peripheral wall of the cap 1 in front of the annular airtight portion 2. On the rib 6,
Four longitudinal grooves 3 are provided in the axial direction. Due to the ribs 6, when an infant or the like accidentally swallows, a frictional resistance with the inner wall of the trachea is generated, and it is difficult to penetrate deep into the trachea.
It can be easily exhaled and is more secure.

An engaging portion 7 composed of two ribs 6 is provided on the top outer peripheral wall of the cap 1. When two identical caps of FIG. 5 are applied to a double-headed writing instrument, the engaging portion 7 is provided with a projection 8 at the opening of another cap.
The rear end of the cap can be inserted by over-fitting between the ribs 6 (the two-dot chain line in FIG. 5 indicates another cap). Other configurations are the same as in the first embodiment.

In the above embodiment, the annular airtight portion has a smooth surface, but other configurations such as annular protrusions are also effective.

[0016]

According to the present invention, the cap of a writing instrument or the like is configured as described above, so that even if an infant or the like accidentally swallows the air, it is possible to reliably flow air and to provide sufficient safety. Further, when the cap is formed of a plastic material, sink does not occur in the airtight portion, and the original ink evaporation preventing function of the cap can be satisfied.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of the first embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG. 1;

FIG. 4 is a cross-sectional view of the outer peripheral wall of the cap according to the second embodiment of the present invention.

FIG. 5 is a longitudinal sectional view of the third embodiment of the present invention.

FIG. 6 is a sectional view taken along line CC of FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cap 2 Annular airtight part 3 Vertical groove 4 Annular groove 5 Vent hole 6 Rib 7 Engagement part 8 Projection 9 Writing implement

Claims (1)

(57) [Scope of request for utility model registration] An annular airtight portion provided on an inner peripheral wall of a cap;
A plurality of axial grooves 3 are provided on the outer peripheral wall of the cap 1 in front of the annular airtight portion 2, and a ventilation hole 5 communicating the vertical groove 3 and the inside of the cap 1 is provided behind the annular airtight portion 2. In a cap such as a writing instrument provided with an air passage for preventing suffocation due to accidental ingestion, an annular groove 4 is provided on the outer periphery of the annular airtight portion 2 and a ventilation hole 5 is opened in the annular groove 4. A vertical groove 3 communicates with said annular groove 4 via a cap, such as a writing instrument.