JP2542386Y2 - 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 that is safe even if it is stuck in the throat by mistake.

[0002]

2. Description of the Related Art In a writing instrument using ink, a cap is used to prevent evaporation of the ink when not in use. That is, the writing instrument cap has a function of keeping the pen body airtight and preventing ink from evaporating.

[0003]

[Problem to be Solved by the Invention] By the way, the cap is separated from the writing instrument body at the time of writing, but the size is almost the same as the "pacifier" for infants. There is. And if accidentally swallowed and clogged in the throat, the writing instrument cap, which has a function to keep the pen airtight and prevent ink from evaporating, has a bottomed cylindrical shape and is not breathable, so Not be able to
Risk of suffocation.

[0004] For this reason, there is a demand for a writing instrument cap that is safe even if it is stuck in the throat by mistake. However, the writing instrument cap having the function of holding the pen body airtight is provided with a large air permeability with a simple structure. It is very difficult to do.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a writing instrument cap which has a simple structure and is safe even if it is stuck in the throat by mistake.

[0006]

In order to achieve the above object, a writing instrument cap according to the present invention is provided on the outer periphery of a bottomed cylindrical lid body having an inner cylinder for sealing a pen body of a writing instrument body. A plurality of annular protrusions in the circumferential direction are formed from the top portion of the lid toward the abutment side, and cutouts are formed in a part of the annular protrusions, respectively, so as to be closest to the abutment with the annular protrusion of the top portion. Vent holes are formed between the annular projections.

[0007]

The pen body of the writing instrument body is sealed with an inner cylinder formed in the lid body, but the ventilation holes are formed between a plurality of annular projections having cutouts in part. However, even if the throat is accidentally jammed, the throat does not adhere to the vent between the annular projections, and the inside and the outside of the lid communicate with each other through this vent. Therefore, it is possible to breathe through the ventilation hole, and it is possible to provide a safe writing instrument cap having airtightness and air permeability with a very simple structure.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to the embodiments shown in the drawings. In FIG. 1, a lid 1 is a bottomed cylindrical body formed of a synthetic resin, and has a size of, for example, an outer diameter of 10.3 mmφ and a length of 30 mm. At the top 1a of the lid 1, which is the bottom of the bottomed cylindrical body, an inner cylinder 2
Are connected continuously. And inside the lid 1,
As shown in FIG. 3, six vertical ribs 6 are formed,
When the lid 1 is fitted to the writing implement main body (not shown) from the abutment 1b, the vertical rib 6 abuts on the front end of the writing implement main body to maintain the posture of the writing implement main body, and the pen body is connected to the inner cylinder 2 by the inner cylinder 2. Sealed to prevent evaporation of the ink.

Next, on the outer periphery of the lid 1, for example, three annular projections 3 are formed at intervals of 2 mm in the circumferential direction from the top portion 1a toward the abutment 1b. The annular projection 3 has a semicircular cross section with a radius of 1.6 mm, for example. Therefore, an annular groove 5 is formed between the annular projections 3. Each annular projection 3 is formed with two notches 4 having a width of 3.3 mm at 180 ° intervals. That is, as shown in FIG. 2, an arc-shaped protrusion slightly smaller than a semicircle is provided on the outer periphery of the lid 1 so as to face each other. is there. The notch 4 is not necessarily provided in the annular projection 3 closest to the abutment 1b.

At the point where the notch 4 and the annular groove 5 intersect, for example, four ventilation holes 7 having an inner diameter of 2.0 mmφ are formed. This ventilation hole 7 may be formed between the annular projection 3 of the top part 1a and the annular projection 3 closest to the abutment 1b.
That is, it may be formed in the annular groove 5 or the notch 4, and may not necessarily be formed in the intersection of the notch 4 and the annular groove 5.

However, even if the cap having the above-described structure separated from the writing instrument main body is erroneously packed in the throat, the plurality of annular projections 3 having the cutouts 4 are formed on the outer peripheral surface of the lid 1. The throat does not adhere to the notch 4 and the annular groove 5, and the inside and the outside of the lid 1 communicate with each other through the ventilation hole 7.
That is, since the inside of the abutment 1b of the lid 1 and the outside of the top portion 1a communicate with each other through the ventilation hole 7, it is possible to breathe through the ventilation hole 4, and the worst situation can be avoided.

[0012]

As described above, in the writing instrument cap of the present invention, a plurality of annular projections each having a cutout portion are formed on the outer peripheral surface of the lid, and between the annular projections. Since the ventilation hole is provided, even if the throat is accidentally clogged, it is possible to breathe through the ventilation hole, and the writing instrument cap having a simple structure and a safe structure can be obtained.

[Brief description of the drawings]

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

FIG. 2 is a front view of the embodiment of the present invention.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 lid 1a lid top 1b lid abutment 2 inner cylinder 3 annular projection 4 notch 5 annular groove 6 vertical rib 7 ventilation hole

Claims (1)

(57) [Scope of request for utility model registration] 1. A plurality of annular projections extending in a circumferential direction from a top portion of the lid toward an abutment side on an outer periphery of a bottomed cylindrical lid having an inner cylinder therein for sealing a pen body of a writing instrument main body. The present invention is characterized in that notches are respectively formed in a part of the annular projections, and a vent hole is formed between the annular projection on the top and the annular projection closest to the abutment. Writing instrument cap.