JP2552154Y2 - Writing instrument cap - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a writing instrument cap which does not cause suffocation even if swallowed accidentally.

[0002]

2. Description of the Related Art Conventionally, in a writing instrument cap of the type which prevents ink from evaporating by air-tightening a writing tip, an outer cylinder is formed to secure a ventilation groove in the axial direction even if swallowed by mistake, One in which the writing tip of the writing instrument is covered with the inner cylinder and air-tight, while air permeability is ensured in the axial direction from the gap between the inner cylinder and the outer cylinder (Japanese Utility Model Application Laid-Open No. 1-139595).
No. 1-169385), and vertical grooves are provided side by side to communicate with the inside of the cap and maintain air permeability in the axial direction even if swallowed through these grooves by mistake. is there.

[0003]

However, when the writing tip is separated from the inner and outer cylinders and the inner cylinder covers the writing tip of the writing implement and is airtight in the above-described conventional apparatus, there is a danger that the core will come into contact with the opening end of the inner cylinder. It causes the core to collapse.
Therefore, the guide is incorporated by a separate part, or a rib is provided to provide the guide, and the shape of the shaft is restricted and prevented. Therefore, the manufacturing process and the mold structure become complicated, resulting in high cost and design restrictions. In addition, molding defects such as sink marks and shorts in the inner cylinder are likely to occur, which may cause air tight defects. Furthermore, providing an air passage in the axial direction from the closed edge to the opening edge through the inside of the cap body on the outer peripheral surface restricts usability in terms of manufacturing and design, and furthermore, the rib provided on the peripheral surface causes the inner surface of the cap to be provided. There is a drawback in that sinking occurs at the time of molding in the airtight portion and the airtightness becomes incomplete. Therefore, this invention is to improve the above-mentioned conventional drawbacks, eliminating the collision of the core by extending the inner cylinder to the cap opening, and further improving the incomplete air tightness due to sink and short of the inner cylinder. And to completely prevent suffocation caused by swallowing. Furthermore, by providing the outer cylinder near the opening end of the cap, the groove provided in the axial direction from the closed end edge can be used as the entire circumferential surface and the entire circumferential gap between the outer cylinder as the air flow passage, the air flow passage can be widened, and swallowing by mistake Even if the suffocation does not occur, the safety is further improved.

[0004]

To this end, a plurality of vertical grooves are provided in the axial direction from the closed end of the cap, and one end of the outer cylinder is provided on the outer surface on the cap opening side through a plurality of ribs at one end. The rib is provided at a position avoiding the vicinity of the outer surface of the main body shaft fitting portion as needed.

[0005]

With the above construction, since the inner cylinder is extended to the cap tongue opening, the inner surface of the cap is integrally formed, so that the inner wall does not collide with the inner wall, so that the inner wall does not collapse. Even if the cap is accidentally swallowed, an air flow path is formed in the gap between the cap and the outer cylinder provided near the groove and the opening edge, and can be used as an air flow path all around. It can be used widely, avoids suffocation by the cap, and avoids the rib holding the upper cylinder near the outer surface of the fitting part, so that the sink due to the rib during molding does not affect the fitting part. hand,
Complete air tight.

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. In each drawing, the same reference numerals indicate the same parts,
1 to 4 show a first embodiment. The cap body 1 has an opening 3 on one side and a closed end 4 on the other end, and has a rib-shaped partition wall 6 having a narrow width between longitudinal grooves 5 which are relatively longer in the axial direction than the edge of the closed end 4. The end portion of the outer cylinder 2 covering the surface of the cap body 1 extending over the groove 5 is extended almost to the vicinity of the opening 3 and integrally formed via a rib 9. According to the present invention, since the above structure is provided, the cap can be easily formed, and the mold can have a simple structure. In addition, since the rib 9 of the outer cylinder 2 to the cap body 1 is provided at a position avoiding the vicinity of the outer surface of the fitting portion 7 (air tight ring), distortion deformation due to sink of the rib 9 at the time of molding prevents the fitting portion 7 from being deformed. 7, airtightening of the tip of the writing point is completely performed. In addition, an air circulation groove is formed from the vertical groove 5 provided on the entire circumference of the front part of the cap body 1 to the gap 10 between the cap body 1 and the outer cylinder 2, and the air circulation groove is widely formed, and suffocation can be prevented by swallowing by mistake. Things. Reference numeral 8 denotes a steady rest when fitted to the tip of the brush shaft.

[0007]

[Effects of the Invention] As described above, the present invention is easy to integrally mold, does not form a distortion deformation due to sink in the air tight portion, does not hit the core on the inner surface of the cap, and does not cause the collapse of the core, and furthermore, the air circulation. It has an excellent effect of completely preventing the suffocation due to widening of the groove and accidental swallowing.

[Brief description of the drawings]

FIG. 1 is a perspective view of a writing instrument cap according to the present invention.

FIG. 2 is a longitudinal sectional view of the writing instrument cap according to the present invention.

FIG. 3 is a cross-sectional view taken along line AA in FIG.

FIG. 4 is a cross-sectional view taken along line BB in FIG. 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cap body 2 Outer cylinder 3 Opening 4 Closed end part 5 Vertical groove 6 Partition wall 7 Fitting part (air tight ring) 8 Anti-sway 9 Rib 10 Gap

Claims (2)

(57) [Scope of request for utility model registration] 1. A cap, such as a felt-tip pen or a marker, fitted to a writing tip for preventing ink from evaporating, wherein a plurality of vertical grooves are provided in the axial direction from a cap closed end, and a cap opening side outer surface. A cap for a writing instrument, wherein an outer cylinder whose one end engages the vertical groove via a plurality of ribs is integrally provided. 2. The writing instrument cap according to claim 1, wherein the rib is provided at a position avoiding the vicinity of the outer surface of the body shaft fitting portion.