JPH1199796A - Fitting structure of cap for writing utensil - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure safety against mistaken swallowing by a baby or the like and surely prevent troubles such as leakage of ink, etc., while securing airtightness in the inside of the cap. SOLUTION: An annular elastic body 16 is fitted to the step part 15 of a writing barrel 12. On one hand, an air discharge path 17 is formed between the internal cap 9 of a cap 2 for writing utensils and an external cap 3 for sticking the internal cap 9 by a plurality of ribs 10. An air-passing hole 7 is bored in the external cap 3 of the lower part of a clip part 6. Thereby, compressed air in the inside of the cap for the writing utensils is discharged from the air-passing hole of the external cap through the air discharge path in accordance with fitting of the cap for the writing utensils to the writing barrel and fitting is certainly enabled. Also, airtightness in the inside of the internal cap is maintained by the ringlike elastic body fitted to the step part of the writing barrel. Furthermore, flow of air is secured through the air discharge path and the air-passing hole and respiration is secured even if a baby or the like mistakenly swallows the cap.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a writing instrument, particularly to a mounting structure for a writing instrument cap used in a direct liquid writing instrument such as a marker.

[0002]

2. Description of the Related Art Conventionally, a writing instrument cap used in a writing instrument, especially a direct liquid writing instrument such as a marker, is used to prevent drying of a pen tip and to prevent ink from leaking from a writing axis due to heat or the like. By improving the reliability of attaching the cap to the writing shaft, the air in the cap when the cap is attached will be compressed and included, causing the backflow of air into the writing shaft and the repulsion of compressed air. Because incomplete mounting of the cap may occur, it is possible to discharge the air compressed and contained in the cap to the outside of the cap while securing the airtightness in the cap at the time of mounting the cap. Along with attaching an annular elastic body to the writing shaft, the cap has a through hole, and is compressed in the cap with the attachment of the cap.
The airtightness inside the cap is ensured by closing the through-hole with an annular elastic body attached to the writing shaft while exhausting the enclosed air through the through-hole (actually open flat 4). No.-107086), and by providing a vent on the top of the cap and holding the elastic seal portion in the cap via the mounting portion and the expansion and contraction portion, it is compressed and included in the cap when attached to the writing shaft. While discharging air from the air vent provided at the top of the cap, and finally closing the air vent provided at the top of the cap with the elastic seal part, the air tightly adheres to the pen tip of the writing shaft, so that ink etc. Preventing drying or leakage (Japanese Utility Model Laid-Open No. 6-4577)
No. 9) has been proposed.

[0003]

However, in the case of Japanese Utility Model Laid-Open No. 4-107068, for example, as in the above-mentioned conventional case, the compressed air generated in the process of mounting the cap is discharged through a through hole formed in the cap. Eventually, this through hole is also sealed by the annular elastic body of the writing shaft, ensuring the airtightness inside the cap. Since the opening itself of the cap is also not closed, the compressed air in the cap is easily discharged out of the cap, but in the later stage of attaching the cap to the writing shaft,
Since the opening itself of the cap is already closed, the air in the cap cannot be discharged, and the air is exclusively discharged from the through-hole formed in the cap, and the air compressed and contained in the cap. Resistance is generated and increases, which makes it difficult to install the cap due to the repulsion of the compressed air inside the cap, causing problems such as drying of the pen tip of the writing shaft and leakage of ink. There are drawbacks that can arise.

[0004] In the case of Japanese Utility Model Laid-Open No. 6-45779, when the cap is attached, the air compressed and contained in the cap is exhausted from the vent provided on the top of the cap, and the vent and the writing shaft are provided. The pen tip itself is also closed and sealed by the elastic seal portion, so that it is possible to secure airtightness in the cap and prevent leakage of ink, etc., but to close the air hole of the cap, The mounting structure of the elastic seal portion, which also covers the pen tip, is complicated, so that the manufacturing cost of the cap is significantly increased, its application range is significantly limited, and the vent hole at the top of the cap is closed. Since the elastic seal part also covers the pen tip, if the cap is repeatedly installed, the elastic seal part is likely to be damaged, and the airtightness inside the cap is reduced. There is a problem that prevention of leakage of the coercive and the ink becomes difficult.

Further, when an infant or the like accidentally ingests these caps, for example, in the case of Japanese Utility Model Laid-Open No. 4-107086 or Japanese Utility Model Laid-Open No. 6-45779, the through-holes or vents are directly exposed. Therefore, when these caps are caught in the flexible trachea, the through-holes or vents of these caps tend to be blocked by the flexible trachea, and sufficient breathing cannot be ensured, resulting in suffocation. And so on.

Accordingly, the present invention has been made to solve the above-mentioned problems of the prior art, and it is necessary to secure the airtightness in the cap while ensuring the safety against accidental ingestion of infants and the like, and to prevent the leakage of ink and the like. The above-mentioned problem can be surely prevented.

[0007]

For this purpose, an outer cap for integrally fitting a clip body consisting of a crown portion and a clip portion, and a rib integrally formed on the inner wall surface of the outer cap within the outer cap. And a writing shaft including an inner cap that fits the top of the recess into the crown of the clip body, and a writing shaft that has an ink reservoir for storing ink that is excessively supplied inside. In the writing implement, the annular elastic body is attached to the writing shaft step portion of the writing shaft, while being formed between the inner cap of the writing instrument cap and the outer cap that holds the inner cap with a plurality of ribs. An air circulation hole is formed in the outer cap of the clip attachment portion with respect to the air discharge path.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The mounting structure of a writing instrument cap according to an embodiment of the present invention has the above-described structure. Therefore, when the writing instrument cap is mounted on the writing shaft, the writing instrument cap is mounted by attaching the writing instrument cap. Compressed air generated in the air penetrates the outer cap below the clip portion through an air discharge path formed between the inner cap of the writing instrument cap and the outer cap holding the inner cap with a rib. Since the compressed air is discharged from the circulation hole, the compressed air due to the mounting of the writing instrument cap is smoothly discharged to the end to prevent the mounting failure of the writing instrument cap due to the resistance of the compressed air, and the writing instrument cap is removed. When completely attached to the writing shaft, the edge of the opening of the inner cap of the writing instrument cap is an annular bullet attached to the writing shaft step of the writing shaft. Even if there are some irregularities on the body, the elasticity of the elastic body absorbs the irregularities so that it will be in close contact with the body, so the airtightness inside the inner cap that contains the pen tip of the writing shaft will be improved. Can be reliably maintained.

Further, even if an infant or the like accidentally swallows the writing instrument cap attached to the writing shaft constituting the writing instrument and locks the cap on the trachea, the inner cap of the writing instrument cap and the inner cap are removed. Since the air circulation holes formed in the outer cap of the clip attaching portion are integrally connected to each other via an air discharge path formed between the outer cap and the outer cap held by the plurality of ribs, In addition, the air flow hole allows the minimum air flow, and in particular, since the air flow hole is covered and pierced by the clip mounting portion, it is not blocked by a flexible trachea and breathes. Therefore, dangerous situations such as suffocation can be avoided, and safety can be improved.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. (1) is a writing implement having a mounting structure for a writing implement cap according to an embodiment of the present invention.
Is an outer cap (3) in which a clip body (4) composed of a crown part (5) and a clip part (6) is integrally fitted, and an inner wall surface (8) of the outer cap in the outer cap (3). An inner cap (9) is fixed to a plurality of integrally formed ribs (10) and has a recessed top part (11) fitted to a crown part (5) of a clip body (4). Writing instrument cap (2) and pen tip at tip (13)
And a writing shaft (12) having a separate bellows portion (14), for example, an ink reservoir for holding ink supplied excessively inside.

In the writing implement (1), the annular elastic body (1) is attached to the writing shaft step (15) of the writing shaft (12).
6) On the other hand, the inner cap (9) of the writing instrument cap (2) and the
The outside of the clip mounting portion (19) of the clip body (4) integrally fitted to the outer cap (3) with respect to the air discharge path (17) formed between the outer cap (3) and the outer cap (3) held by An air communication hole (7) communicating with the outside is formed in the cap (3).

Since the writing implement (1) having the mounting structure of the writing implement cap according to the embodiment of the present invention has the above-described configuration, in this writing implement (1), the writing implement cap (2) is connected to the writing shaft (12). ) Is generated in the writing instrument cap (2) by attaching the writing instrument cap (2) so as to enclose the pen tip (13) which is fixed by projecting from the tip of the writing shaft (12). The compressed air to be initially applied to the inner cap (9) of the writing instrument cap (2)
Is gradually discharged from the opening edge (18) of the writing instrument, but the attachment of the writing instrument cap (2) progresses, and the opening edge (18) of the inner cap (9) of the writing instrument cap (2) advances. When the opening area is reduced, air formed between the inner cap (9) of the writing instrument cap (2) and the outer cap (3) holding the inner cap (9) by the plurality of ribs (10). An air flow hole (7) drilled in the outer cap (3) of the clip mounting portion (19) of the clip body (4) integrally fitted to the outer cap (3) via the discharge path (17). Since the compressed air is discharged, the compressed air due to the attachment of the writing instrument cap (2) is smoothly discharged to the end through the air discharge path (17) and the air circulation hole (7), and the writing instrument cap is formed by the resistance of the compressed air. (2) Attaching to the writing shaft (12) It is possible to prevent the good.

When the writing tool cap (2) is completely attached to the writing shaft (12), the opening edge (18) of the inner cap (9) of the writing tool cap (2) is connected to the writing shaft. With respect to the annular elastic body (16) attached to the writing shaft step (15) of (12), even if there is some unevenness, the elasticity of the elastic body (16) absorbs the unevenness. Since it will be in close contact, the writing axis (12)
The airtightness in the inner cap (9) enclosing the nib (13) can be reliably maintained.

Further, even if an infant or the like accidentally swallows the writing instrument cap (2) attached to the writing shaft (12) constituting the writing instrument (1) and causes the cap to catch on the trachea,
An air discharge path (17) formed between an inner cap (9) of the writing instrument cap (2) and an outer cap (3) holding the inner cap (9) by a rib (10). The clip attaching portion (19) of the clip portion (6) of the clip body (4) integrally fitted to the outer cap (3).
Since the air circulation hole (7) formed by being covered by the clip portion (6) is integrally connected to the outside in
The air discharge path (17) and the air circulation hole (7) allow a minimum amount of air to flow, and in particular, the outer cap (3)
Is formed in the clip mounting portion (19) of the clip body (4) integrally fitted to the outer cap (3). )
Can prevent the air circulation holes (7) from being blocked by the flexible trachea and can breathe, so that dangerous situations such as suffocation can be avoided and safety for infants and the like can be improved. Become.

[0015]

As described above, the compressed air in the writing instrument cap is discharged from the air flow hole of the outer cap through the air discharge path with the attachment of the writing instrument cap to the writing shaft. By maintaining the airtightness in the inner cap while maintaining the airtightness of the inner cap by means of an annular elastic body attached to the writing shaft step portion of the writing shaft, the compressed air generated in the writing tool cap is discharged to write the writing tool. In addition to ensuring the attachment of the cap, the writing instrument cap, particularly the pen tip, is enclosed by the elastic contact between the annular elastic body of the writing shaft and the opening edge of the inner cap of the writing instrument cap. Ensuring that the airtightness in the cap is maintained to prevent problems such as drying of the pen tip or leakage of ink, and to prevent accidental suffocation due to accidental ingestion of infants, etc. And it has a superior effect capable.

[Brief description of the drawings]

FIG. 1 is an overall sectional view of a writing implement having a mounting structure for a writing implement cap according to an embodiment of the present invention.

FIG. 2 is an exploded enlarged sectional view of the writing instrument in FIG.

FIG. 3 is an enlarged cross-sectional view of a writing instrument cap constituting the writing instrument in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Writing implement 2 Writing implement cap 3 Outer cap 4 Clip body 5 Crown part 6 Clip part 7 Air circulation hole 8 Outer cap inner wall surface 9 Inner cap 10 Rib 11 Top part 12 Writing shaft 13 Pen tip 14 Bellows part 15 Writing shaft step 16 Annular elastic body 17 Air exhaust passage 18 Opening edge (of inner cap) 19 Clip mounting part

Claims (1)

[Claims] An outer cap for integrally fitting a clip body composed of a crown portion and a clip portion, and a recess formed in the outer cap and fixed to a rib integrally formed on an inner wall surface of the outer cap. In a writing instrument comprising a writing instrument cap comprising an inner cap whose top is fitted to the crown of the clip body, and a writing axis having an ink reservoir for retaining ink supplied excessively therein, While an annular elastic body is attached to the writing shaft step portion, the inner cap of the writing instrument cap and the air discharge path formed between the outer cap that holds the inner cap with a plurality of ribs, An air circulation hole is drilled in the clip attachment part, and the compressed air in the writing instrument cap is exhausted from the air circulation hole of the outer cap through the air exhaust path when the writing instrument cap is attached to the writing shaft. A mounting structure for a writing implement cap that holds the inner cap while maintaining the airtightness by an annular elastic body attached to the writing shaft step portion of the writing shaft.