JPH0911684A - Cap for writing utensil - Google Patents

Abstract

PURPOSE: To ensure positively an air circulation path for breathing, and prevent suffocation by forming a first groove at the outside surface of a small-diameter part for defining a pen tip housing chamber, and forming a second groove at the outside surface of a large-diameter part defining a pen tip insertion opening, and also forming a peripheral air reservoir recess between the first groove and the second groove. CONSTITUTION: A small-diameter part 5 and a large-diameter part 6 are made on the outside surface 4 of a cap A, and a pen tip housing chamber 2 is situated at the place corresponding to the small-diameter part 5 of an inner hole 1. A plurality of a first grooves 10 and second grooves 11 are formed respectively in the small-diameter part 5 and the large-diameter part 6 in their longitudinal direction. The large-diameter part 6 has a skirt part 12 extending over the first grooves 10 of the small-diameter part 5. Thus, a peripheral air reservoir recess 13 is defined between the first grooves 10 and the second grooves 11. Accordingly, when a child takes the cap by mistake, the whole grooves can effectively be ensured as a breathing air circulation path with the result that suffocation can be prevented.

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 plurality of grooves for preventing choking on its outer surface.

[0002]

2. Description of the Related Art Conventionally, it is known that an air flow passage is secured so as not to suffocate even when a child accidentally swallows the cap of a writing instrument. As an example, German Patent Publication No. 3921730 discloses that a plurality of grooves are formed over the entire outer surface of a cap of a writing instrument. However, when the groove is formed over the entire length of the outer side surface of the cap, when an airtight holding part is provided in the inner hole of the cap to prevent the tip of the pen from drying, there is a possibility that the synthetic resin may flow or shrink during injection molding. The airtight holding part may deviate largely from the design size or the shape at the time of design, and the airtight holding part may not adhere to the abutting part of the writing instrument body and the drying of the pen tip may not be suppressed. Or the fitting of the writing instrument body in the airtight holding section becomes stronger than necessary, a sudden pressure change force is applied to the pen tip when the cap is removed, and ink is sucked out from the pen tip and ink leaks. was there.

On the other hand, in Japanese Utility Model Laid-Open No. 6-29886, a first groove and a second groove are formed on the outer surfaces of the small diameter portion and the large diameter portion, respectively, and the outer surface corresponding to the airtight holding portion of the cap inner hole is formed. Shows the one provided with a portion where the groove is not formed.

Further, in Japanese Utility Model Laid-Open No. 4-89388, a rib for preventing choking is formed from one end of the outer surface of the cap to the middle abdomen, and the rib protruded to the outer surface from the middle abdomen to the other end. By forming the groove, the groove and the rib ensure a continuous air flow passage over the entire length of the cap.

[0005]

However, the first groove and the second groove are formed on the outer surfaces of the small diameter portion and the large diameter portion, respectively, and the groove is formed on the outer surface corresponding to the airtight holding portion of the cap inner hole. If there is a part that is not covered with the writing instrument, if the child accidentally swallows the cap of the writing instrument and the part where this groove is not formed is in close contact with the inner wall of the trachea, the original purpose is to prevent choking. There was a problem that it could not be achieved.

Further, a groove for preventing asphyxiation is formed from one end of the outer side surface of the cap to the middle abdominal portion, and a rib protruding to the outer side surface is formed from the middle abdominal portion to the other end, thereby forming the groove. With ribs, a continuous air flow passage is secured over the entire length of the cap.If the cap is clogged in the throat, etc. This would block the flow passage, and there was a problem in the reliability of suffocation prevention.

[0007]

That is, according to the present invention, in a cap of a writing instrument having a plurality of grooves for preventing suffocation formed on an outer side surface thereof, the outer side surface has a pen tip of a writing instrument body in an inner hole of the cap. And a large-diameter portion that forms the insertion opening of the pen tip. A first groove is formed on the outer surface of the small-diameter portion and a first groove is formed on the outer surface of the large-diameter portion. The gist of the cap of a writing instrument is to form two grooves and to form a circumferential air reservoir recess between the first groove and the second groove.

[0008]

In the event that the cap of the writing instrument of the present invention is clogged in the throat or the like, the air flow passage formed is not limited to the longitudinal direction of the cap, but also to the first groove through the circumferential air reservoir recess. Since the second groove is connected, even if a part of the first groove or the second groove is blocked by a foreign substance such as food, it is connected to another groove by the circumferential air pool recess. Since air can flow, the entire groove can be effectively secured and the suffocation prevention reliability can be excellent.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
1 to 3 show an embodiment of the present invention. FIG.
[FIG. 3] is a vertical sectional view of a cap A. Inner hole 1 of cap A
Has a pen tip accommodating chamber 2 for accommodating the pen tip B1 of the writing instrument body B shown by a broken line in the drawing, and a pen tip insertion port 3. The outer surface 4 of the cap A has a small diameter portion 5 and a large diameter portion 6
Is formed, and the nib accommodating chamber 2 is located at a position corresponding to the small diameter portion 5 of the inner hole 1. Since the pen tip accommodating chamber of the writing instrument cap must suppress the ink drying of the pen tip, it is preferable to reduce the capacity thereof, and in particular, a so-called oil-based ink writing instrument using an organic solvent such as alcohol is used as the writing instrument. When used, it is preferable to minimize the space inside the pen nib housing chamber with the cap and the writing instrument main body attached. In addition, the pen tip accommodating chamber 2 is attached to the inner wall of the pen tip accommodating chamber 2 with the writing instrument body attached.
A circumferential airtightness-holding convex portion 7 that abuts the writing instrument main body B so as to keep the inner space airtight, and a circumferential fixed convex surface portion 8 that is press-fitted into the writing instrument main body B are formed. Further, a fitting surface 9 for press-fitting a rear part (not shown) of the writing instrument body is formed at a portion corresponding to the large diameter portion 6 of the inner hole 1.

A plurality of first grooves 10 are formed in the small diameter portion 5 of the outer side surface 4, and a plurality of second grooves 11 are formed in the large diameter portion 6 in the longitudinal direction. Further, the large diameter portion 6 is the first groove 1 of the small diameter portion 5.
0 has a skirt portion 12 extending up to 0, whereby a circumferential air reservoir recess 13 is formed between the first groove 10 and the second groove 11. In the example of this figure,
Part of the small-diameter portion 5 in the area of the air reservoir recess 13 is a first portion.
There is an area where no groove is formed, but this does not change the wall thickness in the circumferential direction of the portion corresponding to the airtightness holding convex portion 7 formed in the cap inner hole 1 described above. This is to prevent the size and shape of the portion from largely deviating from the design as much as possible.

As shown in FIG. 2, which is a side view of the first embodiment, the second groove 11 formed in the large diameter portion 6 communicates with the notch 14 at the tip portion of the skirt portion 12. . Since the second groove 11, the air reservoir recess 13 and the first groove 10 communicate with each other through the notch 14, the air flow passage is formed even when foreign matter comes into contact with the tip portion of the skirt portion 12. It can be secured. FIG.
As shown in FIG. 3, which is a view in the I direction of FIG.
Since the positions of 0 and the second groove are displaced in the radial direction, it is possible to suppress as much as possible the state in which the air cannot flow through the first groove and the second groove due to one foreign matter.
The first groove and the second groove may be formed on the same straight line in consideration of easiness of manufacturing the die, and further, the groove shape may be formed to be the same.

In addition to the above, various modifications can be made without departing from the gist of the present invention. As an example, the convex portion formed in the inner hole 1 is formed in a portion corresponding to the portion where the groove is formed on the outer surface, except for the convex portion for maintaining the airtightness of the pen nib housing space. It is also possible to form the fitting protrusion with the writing instrument main body at a portion corresponding to the large diameter portion 6, but in consideration of the state of the fitting strength with the writing instrument main body, the fitting position, etc., a groove is formed on the outer surface. Position where the groove is formed as a protruding part that is formed on the same circumference without forming a circumferential convex part in order to suppress sink marks during molding as much as possible. It is more preferable to form at a position corresponding to. Further, in the above example, the grooves are shown as being linear and formed in a direction parallel to the longitudinal direction of the cap A. However, they may be formed in a curved line or even in a straight line in the longitudinal direction of the cap A. In contrast, it can be formed obliquely, or can be formed in a female screw shape. Especially when the groove is formed on a curve or diagonally,
It can be said that when the cap is attached to and detached from the writing instrument main body, clues in the radial direction can be provided, which is preferable.

[0013]

EFFECTS OF THE INVENTION The cap of the writing instrument of the present invention is effective in ensuring the entire groove as an airflow passage for breathing even when a child or the like accidentally swallows it, and is excellent in the reliability of suffocation prevention. It can happen.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment.

FIG. 2 is an external view showing an example.

FIG. 3 is a view on arrow I in FIG.

[Explanation of symbols]

 A Cap B Writing instrument main body B1 Pen tip 1 Inner hole 2 Pen tip storage chamber 3 Pen tip insertion port 4 Outer side surface 5 Small diameter part 6 Large diameter part 7 Airtight holding convex part 8 Fixed convex surface part 9 Fitting surface 10 First groove 11 Second groove 12 Skirt portion 13 Air reservoir recess 14 Notch

Claims (1)

[Claims] 1. A writing instrument cap having a plurality of grooves for preventing suffocation formed on an outer side surface thereof, wherein the outer side surface has a small diameter portion which forms a pen tip accommodating chamber of a writing instrument body in an inner hole of the cap. The small diameter portion has a large diameter portion that forms an insertion opening, and a first groove is formed on the outer surface of the small diameter portion and a second groove is formed on the outer surface of the large diameter portion. A cap for a writing instrument, wherein a circumferential air reservoir recess is formed between the first groove and the second groove.