JPH08290697A - Cap of writing utensil - Google Patents

Abstract

PURPOSE: To obtain a novel cap of a writing utensil in which an air vent path is ensured for preventing suffocation if the cap is swallowed, a sealing part is provided for preventing a writing tip from drying, a cap body has a simple inner structure and can be easily molded, a limitation in selecting a material is reduced, and a low-cost material is available upon request for a transparent cap. CONSTITUTION: On an inner surface of a tubular part 2 of a top crown 1 formed singly or integrally with a clip 8, a plurality of ribs 3 are radially projected toward the radial center of the tubular part 2. An elastic sealing material 4 is clamped by the inner end parts of the ribs 3. An air vent hole 6 communicating with a gap 5 between the ribs 3 is provided in a top surface of the tubular part 2. The tubular part 2 of the top crown 1 is inserted into the upper end opening of a tubular cap body 7 opened at both ends thereof.

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 having a ventilation passage whose both ends are opened so as not to suffocate when swallowed.

[0002]

2. Description of the Related Art A cap is originally intended to prevent the tip of the brush from drying, and it is necessary to secure a seal for the tip of the pen even when an air passage is provided in the cap. Then, as a method of providing a ventilation passage and a seal portion of the writing tip portion side by side with the cap, conventionally, for example, as shown in FIG. 4, the writing tip is located at the center position in the radial direction inside a cylindrical cap body 11 having both ends opened. Small tubular middle cap 1 that can be inserted
2 is provided to hold the elastic seal material 13 into which the tip of the brush can be immersed, and a plurality of radial ribs 14 are radially provided on the outer peripheral portion of the middle cap 12, and the ribs 14 are provided. The middle cap 12 and the cap body 11 are integrally connected via the above, and the gap 15 between the rib 14 and the rib 14 serves as a ventilation path, and a ventilation port 17 is provided on the top surface. The crown 18 integrated with 16 is inserted inside the upper end opening of the cap body 11.

[0003]

As in the above-mentioned conventional example,
The cap of the writing instrument adopting a configuration in which the middle cap 12 is integrally provided inside the cap body 11 via the rib 14 has a complicated internal structure of the cap body 11, and when molding this using a mold, There is a problem that the release resistance is large. Therefore, there is a disadvantage that a resin having a poor releasability cannot be used and material selection is limited. Furthermore, from the design point of view, when trying to meet the demands of making the cap transparent or improving the repeated fitting performance with the writing instrument body, the range of material selection must be narrowed and expensive materials must be used. More often than not. The present invention is intended to solve such problems,
That is, while ensuring a ventilation path so as not to suffocate even if swallowed, it is equipped with a seal part that prevents the tip of the brush from drying, moreover, the internal structure of the cap body is simple and easy to mold, there are few restrictions on material selection, An object of the present invention is to provide a novel writing instrument cap that can use an inexpensive material even when it is required to be transparent.

[0004]

In order to achieve the above object, the cap of the writing instrument according to the present invention is provided on the inner surface of the tubular portion 2 of the crown 1 alone or integrated with the clip 8 in the radial center. A plurality of facing ribs 3 are radially provided so as to sandwich the elastic sealing material 4 at the inner end portions of the ribs 3 and to communicate with the gap 5 between the ribs 3 and the ventilation port 6
Is provided on the top surface of the tubular portion 2, and the tubular portion 2 of the crown 1 is inserted inside the upper end opening of the tubular cap body 7 having both ends opened. is there.

[0005]

[Function] The ribs 3 provided on the inner surface of the tubular portion 2 of the crown 1 and the gaps 5 between the ribs 3 and the vent holes 6 provided on the top surface of the tubular portion 2
By forming an air passage from one end of the cap to the other end, it is possible to avoid suffocation even if the cap is accidentally swallowed and clogged in the throat. Further, when the writing tip portion comes into contact with the elastic seal material 4 sandwiched by the tip portions of the ribs 3 and is immersed therein, the writing tip portion is covered with the elastic seal material 4 and the evaporation of ink from the writing tip portion is prevented. Further, the internal structure of the cap main body 7 is simplified by installing the air gaps 5 between the ribs 3 and the elastic sealing material 4 inside the tubular portion 2 of the crown 1. Molding is facilitated and the release resistance is reduced.

[0006]

EXAMPLES Examples of the present invention shown in FIGS. 1 to 3 will be described below. First, FIG. 3 shows a disassembled state. Reference numeral 7 is a cylindrical cap body having both ends opened, and the cap body 7 is made of polycarbonate and is transparent. A locking recess 9 is provided on the inner surface of the cap body 7. The cap body may be formed of PET (polyethylene terephthalate) resin.

Next, reference numeral 1 is a crown made of ABS resin,
The crown 1 is formed integrally with the clip 8. The crown 1 may be molded separately from the clip 8 to be a single component. The crown 1 has a cylindrical portion 2 having a vent hole 6 on the top surface. Locking projections 10 are provided on the outer surface of the tubular portion 2, and ribs 3 are provided on the inner surface at a plurality of positions in the circumferential direction toward the center in the radial direction, and gaps are provided between the ribs 3. 5, the voids 5 communicate with the vent holes 6 on the top surface.

Next, reference numeral 4 is an elastic sealing member made of rubber and having a substantially spherical shape. This elastic sealing material 4 is inserted into the center of the tubular portion 2 of the crown 1, and is sandwiched by the inner ends of a plurality of ribs 3 surrounding it.

1 and 2 show the assembled state of the above parts. The crown 1 in which the elastic sealing material 4 is held inside the tubular portion 2 has the tubular portion 2 covered by the cap body 7.
Is inserted into the upper end opening of the cap main body 7, and the locking convex portion 10 is engaged with the locking concave portion 9 of the cap body 7 to prevent it from coming off.

The writing tip portion (not shown) of the writing instrument main body is housed inside the cap main body 7 and further inside the cylindrical portion 2 of the crown 1, and is sealed by being immersed in the elastic sealing material 4. .

The lower end opening of the cap body 7, the gap 5 between the ribs 3 on the inner surface of the tubular portion 2 of the crown 1 and the ventilation hole 6 on the top surface of the crown 1 allow the cap to be closed. Both ends are open, so you can avoid suffocation if you accidentally swallow and get stuck in your throat.

[0012]

The cap of the writing instrument of the present invention is as described above, and the tip of the writing brush can be surely sealed. However, even if an accident such as accidental swallowing and clogging of the throat occurs, suffocation occurs. There is an effect that can prevent. The present invention particularly adopts the structure in which the rib 3 is provided on the inner surface of the tubular portion 2 of the crown 1 to form the ventilation passage, so that the internal structure of the cap body 7 is simplified and the molding is performed by the mold. Has the advantage that the mold release resistance is reduced. Therefore, there is no problem even if you use a resin that does not have good releasability, so you can expand the range of material selection, make the cap transparent, improve the repeated fitting performance with the writing instrument body, etc. As mentioned in the above embodiment, since a relatively inexpensive resin such as PET (polyethylene terephthalate) can be used, there is an advantage that cost increase can be avoided.

[Brief description of drawings]

FIG. 1 is a vertical sectional view.

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

FIG. 3 is a vertical sectional view in an exploded state.

FIG. 4 is a vertical sectional view of a conventional example.

[Explanation of symbols]

 1 Crown 2 Cylindrical part 3 Rib 4 Elastic sealing material 5 Void 6 Vent 7 Cap body 8 Clip 9 Locking recess 10 Locking convex part 11 Cap body 12 Medium cap 13 Elastic sealing material 14 Rib 15 Void 16 Clip 17 Ventilation Mouth 18 crown

Claims (1)

[Claims] 1. A plurality of ribs (3) extending radially toward the center in the radial direction are provided on the inner surface of a tubular portion (2) of a crown (1) alone or integrated with a clip (8), and inner ends of these ribs (3). The elastic seal member 4 is sandwiched between the ribs 3 and the vents 6 communicating with the gaps 5 between the ribs 3 are provided on the top surface of the tubular portion 2, and the upper end of the tubular cap body 7 with both ends open. A cap for a writing instrument, wherein the tubular portion 2 of the crown 1 is inserted inside the opening.