JP2001080280A - Container for housing spare lead of mechanical pencil, etc. - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent leads from falling from a vent hole formed in a cap and to secure necessary ventilation surly by the hole. SOLUTION: In a container for housing spare leads, the opening part 7 of a container main body 1 for housing leads of mechanical pencil, etc., is made openable/closable, and vent holes 4a, 4b which are in the shape of a slender plane and have a width smaller than the outside diameter of the leads to be housed in the main body 1 and a length to obtain a necessary opening area to secure prescribed ventilation required for safety in a relationship to the width are formed in the roof 6 of a cap 3 which is attachable/detachable to/from the main body 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an extra lead (replacement extra lead) used for a mechanical pencil or a plotter.
The present invention relates to a container for storing

[0002]

2. Description of the Related Art A refillable container such as a mechanical pencil has a cap-removable type in which a cap for opening and closing an opening of a container body for accommodating a core is completely separated from the container body, and a cap which is connected via a hinge. There is a cap-integrated type that is connected to the cap body, but especially the former cap removable type has the danger that schoolchildren etc. accidentally swallow the cap removed from the container body and clog it in the throat and choke. is there.

[0003] In order to avoid this danger, a vent is provided in a detachable cap.
If the inside diameter of the air hole is increased in order to secure the required air flow, there is a disadvantage that the core falls out of the air hole.

Therefore, in order to further solve this problem, the vent hole of the cap is shifted to the outside without being positioned directly above the opening of the container body so that the tip of the core enters the vent hole of the cap. One in which the core is inclined so as not to pass through the vent hole (see Japanese Patent Application Laid-Open No. 9-290593), and one in which the vent hole of the cap is bent in the depth direction so as not to pass through the core (Japanese Patent Laid-Open Publication No. Hei 9-290593). 9-2074
No. 89) has been devised. However, the former has the disadvantage that it cannot prevent the core from falling off when the core is short, and the latter has the advantage that it can prevent the core from falling off even with a short core. There are drawbacks that it is difficult to secure a required air flow rate due to obstruction, and that the structure of the molding die becomes complicated and burrs that prevent air flow easily occur inside the air holes.

[0005]

SUMMARY OF THE INVENTION Accordingly, the present invention is directed to a mechanical device such as a mechanical pencil which does not cause the core to fall out of a vent hole provided in a cap and which can reliably secure a required amount of air through the vent hole. An object is to provide a refill container.

[0006]

SUMMARY OF THE INVENTION In order to solve the above problems, a refillable lead container such as a mechanical pencil of the present invention comprises an opening 7 of a container body 1 for receiving a lead such as a mechanical pencil.
Can be opened and closed, and can be detachably attached to the container body 1.
The top plate 6 has an elongated planar shape, the width of which is smaller than the outer diameter of the core to be housed in the container body 1, and a predetermined ventilation amount required for safety is secured in relation to the width. Therefore, a ventilation hole having a length capable of obtaining a necessary opening area is provided.

[0007] In the refillable container such as a mechanical pencil of the present invention, it is preferable to provide a spiral groove 5 on the side surface of the container body 1.

[0008]

FIG. 1 shows an embodiment of the present invention.
First, the refill core storage container includes a hollow container main body 1 for storing the core, a display ring 2 for hardness, color, and core diameter of the core, and a cap 3 detachable from the container main body 1. Thus, these components are made of plastic.

The container body 1 has a cylindrical shape with a circular cross section, has an opening 7 at the upper end, and includes a cap 3 and a display ring 2.
Has a circular cross section, but the shape is not limited to these, and may be any shape. For example, the cross section may be an ellipse or a square.

[0010] As shown in FIG.
The vent holes 4a, 4b, 4c having the same width W and the same length L are formed at three locations, each having a circular arc shape in plan view.
These ventilation holes 4a, 4b, 4c are arranged in a ring shape as a whole. The width W of the ventilation holes 4a, 4b, 4c in the planar shape is set to be smaller than the outer shape d of the core housed in the container body 1, that is, to satisfy the relationship of w <d. For example, in this embodiment, since the outer diameter of the core housed in the container body 1 is 0.57 mm (nominal diameter 0.5 mm), the width W of the ventilation holes 4a, 4b, 4c is set to 0.1 mm.
It is set to 52 mm.

In addition, the entire length of the ventilation holes 4a, 4b, 4c in the plane shape is 3L (three ventilation holes 4a, 4b, 4c).
b, 4c) is the total opening area S
, Ie, S ≒ 3L × w. Further, the opening area S of each of the ventilation holes 4a, 4b, 4
c, ie, V ≒ S × U
(U is the flow velocity). It is necessary to set the ventilation amount V to be equal to or more than a predetermined ventilation amount determined in consideration of safety. For example, in this embodiment, the ventilation amount of the ventilation type cap defined in the British pen cap safety standard is used. It is set to 9.5 liters per minute, which is larger than 8 liters per minute. Therefore, the opening area is 5.6 mm so that the ventilation rate of 9.5 liters per minute can be secured.
² is set. In addition, an opening area of at least about 4.7 mm ² or more is required to secure a ventilation rate of 8 liters per minute. The total length 3L of the ventilation holes 4a, 4b, 4c is determined from the relationship between the opening area S (5.6 mm ² ) and the width W (0.52 mm) of the ventilation holes 4a, 4b, 4c. It is set to 8 mm.

In this embodiment, the ventilation holes 4a, 4b,
Although the plane shape of 4c is arc-shaped and the number of ventilation holes 4a, 4b, 4c is three, the shape and number of ventilation holes are free and are not limited thereto. However, the width and length of the ventilation holes are set so that the above-mentioned predetermined ventilation volume can be secured. In addition,
The air holes may be divided into a plurality as in this embodiment, but may be a series, and the length of the air holes described in claim 1 is the sum of the lengths of the air holes when there are a plurality of air holes. It refers to the entire length, and in the case of a series, it refers to the total length.

In this embodiment, the ventilation holes 4a, 4b,
Although the width of the plane shape of 4c is constant, the width of the ventilation hole 4d may be changed as shown in FIG.
However, in that case, the maximum width W ₁ smaller than the outer diameter of the core.

In this embodiment, the ventilation holes 4a, 4b,
Although the width in the depth direction in the vertical cross-sectional shape of 4c is also constant, the width in the depth direction of the ventilation hole 4e may be changed as shown in FIG. However, in this case to reduce the minimum width W ₂ than the outer diameter of the core.

By the way, a spiral groove 5 is provided on the side surface of the cap 3 as a non-slip so that the finger does not slip when the cap 3 is removed from the container body 1. As a method for preventing slippage, there is a method in which the side surface of the cap is subjected to graining or knurling. However, forming such a spiral groove 5 is advantageous in that the processing is easier and the antiskid effect is higher than these methods. There is. In addition, even if a material such as rubber or elastomer is attached to the outer surface of the cap, an anti-slip effect can be obtained, but this method has a disadvantage that the cost is higher than that of forming the spiral groove 5. Further, since the spiral groove 5 also has the effect of ventilating between the upper and lower ends of the cap 3 on the outer surface of the cap 3, it is preferable to form the spiral groove 5 as a slip stopper.

[0016]

According to the first aspect of the present invention, the width of the ventilation hole provided in the cap 3 is smaller than the outer diameter of the core, so that the core can be securely removed from the ventilation hole. In addition, since the ventilation holes have a length that can reliably secure a required amount of ventilation, there is an effect that suffocation can be prevented even if school children or the like accidentally swallow and clog the throat.

The refill container such as a mechanical pencil according to the second aspect of the present invention has a spiral groove 5 in addition to the effect of the refill container of the mechanical pencil according to the first aspect. By providing the cap 3, the finger holding the cap 3 is less likely to slip and the cap 3 can be easily removed, and the outer surface of the cap 3 allows ventilation between the upper and lower ends of the cap 3.

[Brief description of the drawings]

FIG. 1 is a side view.

FIG. 2 is an enlarged plan view.

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

FIG. 4 is a plan view of a ventilation hole.

FIG. 5 is a partial vertical sectional view of a cap top plate.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Container main body 2 Display ring 3 Cap 4a, 4b, 4c, 4d, 4e Vent hole 5 Groove 6 Cap top plate 7 Opening

Claims (2)

[Claims] 1. A top plate 6 of a cap 3 capable of opening and closing an opening 7 of a container main body 1 for accommodating a lead such as a mechanical pencil, and detachably attached to the container main body 1. Is smaller than the outer diameter of the core housed in the container body 1 and, in relation to the width, a vent hole having a length capable of obtaining an opening area necessary for securing a predetermined airflow required for safety. A refill container such as a mechanical pencil, which is provided with a. 2. A refillable container such as a mechanical pencil according to claim 1, wherein a spiral groove 5 is provided on a side surface of the container body 1.