JPH0721352Y2 - Writing instrument cap - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a writing instrument cap such as a felt-tip pen, a ballpoint pen, and a felt-tip pen.

[0002]

2. Description of the Related Art Caps for writing instruments such as felt-tip pens, ballpoint pens, felt pens, etc. can be roughly classified into those with clips and those without clips.
There are thicker and thinner ones. Now, when a child or an infant uses a writing instrument, there is a risk that the cap is accidentally put in the mouth and swallowed. If accidentally swallowed, a cap without a clip is very dangerous because it has no airflow passage.

In order to improve these drawbacks, (a) Japanese Patent Laid-Open No. 1-157898 and (b) Actual Kaihei 1-169938.
No. 4, (C) Do 1-169385, (D) Do 1-16
9386, (e) British Published Patent No. 2174374,
(F) Actual Kaihei No. 2-58981, (g) German Published Patent No. 3817248, and (h) German Published Patent No. 3821.
No. 195 and the like are known. Although (a) is different from the present invention, since the air flow passage is provided on the outer surface of the cap, the outer diameter of the cap increases and the amount of material increases, resulting in an increase in cost. Also, since it is a long hole, it is difficult to form. (B) is a cap 2 member of the inner cap, which increases the cost. When the pen tip is covered with the cap, the pen tip enters between the inner cap and the cap,
The pen tip may be scratched. In (c), since the groove is provided in the axial direction of the outer surface of the inner cap, the thickness of the cap becomes thicker and the cost increases. (D) has the same drawbacks as (b). Since (e) is close to the end of the opening of the cap, the pen tip is mistakenly inserted into the hole and the pen tip is damaged. In (f) and (g), since the air circulation port is near the opening of the inner cap, the pen tip is mistakenly inserted and the pen tip is damaged. (H) has a structure for protecting the pen core, but since the air circulation port is made by sliding the mold, burrs and the like are likely to occur.

[0004]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention The present invention provides an air flow passage in a conventional writing instrument cap, and does not damage the pen tip by accidentally inserting the pen tip into the hole of the air flow passage.
It provides a detachable cap.

[0005]

[Means for Solving the Problems] In a writing instrument cap in which an inner cap 2 having a sealing portion 5 inside the outer cap 1 is connected and held by a rib, a collar is continuously provided below an open end 3 of the inner cap 2. 4 is provided, the collar 4 is divided by a slit 7 provided on the axis of the rib 6, and is further separated by the outer cap 1 and the annular space 15, which is a writing instrument cap.

[0006]

The air 9 circulates through the space between the rib 6 and the rib 6'which holds the outer cap 1 and the inner cap 2 together, and further the slit 7 and the annular space 15 formed between the collar 4 and the outer cap 1 are formed. By the way, the air 9 can be surely distributed. Further, even when the pen tip 10 of the writing instrument is inserted from the open end portion 8 of the outer cap 1, the collar 4 has a taper from the outside to the inside, and the pen tip 10 fits inside the inner cap 2 along the taper. Is inserted. For example, even if the pen tip 10 comes into contact with the slit 7, the slit 7 is thinner than the pen tip 10, and in the same direction as the pen core insertion,
Moreover, since it is formed with a taper, the pen tip 10 is not scratched.

[0007]

EXAMPLES The present invention will be specifically described with reference to Examples. In FIGS. 1, 2, and 3, reference numeral 1 denotes an outer cap, an inner cap 2 is installed inside the outer cap, and both are continuously held by a rib 6. The inner cap 2 has a sealing portion 5 at the tip and has a rear end as an open end 3. here,
The number of ribs 6 may be set appropriately, and is provided above the opening end 3. Further, the collars 4 and 4 ′ are integrally provided below the opening end 3 of the inner cap 2, and the outer peripheral side surface thereof is not connected to the outer cap 1 by the annular space 15. Further, the slit 7 divides the collar into a collar 4 and a collar 4 '. The collar 4 and the inner cap 2 may be separate or integrated. The slit 7 has the same slit width as the thickness t of the rib 6 (at 0.3 m / m or more), and the maximum value is the diameter of the pen tip 10 and the extent that the pen tip 10 is not scratched by coming into contact with the slit 7. In addition, the dimensions are appropriately determined.

The number of ribs 6 and the number of slits 7 are the same. The reason is that, as shown in FIG. 4, the tip 14 of the core pin 12 from the opening end side forming the slit 7 in the mold structure forms the rear end surface of the rib 6, and the core pin 13 from the sealing portion 5 forms the entire rib 6. is there. As described above, the writing instrument cap of the present invention can be integrally molded, and the pen tip 10 can be protected and the air 9 can be surely distributed. As a material, a thermoplastic resin such as polypropylene, nylon, DURACON (registered trademark), or a thermosetting resin such as urea, phenol, or polybutyl phthalate can be used.

[0009]

[Effect] The present invention has the above-described configuration. (B) When the pen tip of the writing instrument is covered with the cap, the pen tip touches the collars 4 and 4'and is guided to enter the inner cap. Even if the pen tip comes into contact with the slit 7, since the collars 4'and 4'are tapered, the pen tip 10 slides into the inner cap, and the slit 7 is larger than the diameter of the pen tip 10. Since the width of the pen is small, the pen tip does not get scratched. (B) Even if it is accidentally swallowed, the air flow passage has an annular space 15
It can be secured with the slit 7. (C) Since the cap has a simple structure, it is possible to reliably provide the air circulation port and manufacture the mold at low cost.

[0010]

[Brief description of drawings]

FIG. 1 is a plan view of the present invention.

FIG. 2 is a cross-sectional view of I0I of the present invention.

FIG. 3 is a rear view of the present invention

FIG. 4 is a die drawing of the A0A ′ section of the present invention.

[Explanation of symbols]

 1 Outer cap 2 Inner cap 3 Opening end 4/4 'Tsuba 5 Sealing part 6 Rib 7 Slit 8 Opening end 10 Pen tip 15 Annular space

Claims (1)

[Scope of utility model registration request] In a writing instrument cap in which an inner cap 2 having a sealed portion 5 inside an outer cap 1 is connected and held by a rib, a collar 4 is continuously provided below an open end 3 of the inner cap 2, and the rib 4 is a rib 6 A writing instrument cap, characterized in that it is divided by a slit 7 provided on the axis of, and further separated by an outer cap 1 and an annular space 15.