JPS5831191B2 - Tobacco danger prevention cover - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cigarette safety cover that is highly safe and requires low processing.

A cover that is highly safe means that there is no risk of ignition caused by smoking while smoking, that there is no risk of ash or sparks falling off while smoking and staining clothing, and that there is no risk of sparks falling when smoking in a windy place. A cover with a low degree of processing means that it does not scatter, etc., and means that the number of ventilation holes provided in the cover is reduced to reduce the number of processing steps.

Conventionally, cigarette hazard prevention covers have been developed, for example, by
No. 101983, Utility Model Publication No. 51-96784, Japanese Patent Application Publication No. 1977
Although this is known from Japanese Utility Model Publications No. 2-150176 and Japanese Utility Model Publication No. 37-21057, there has been no consideration given to the total area of the ventilation holes in the cover from the viewpoint of both safety and workability.

According to the present invention, the total area of the ventilation holes is suppressed to the necessary minimum based on the relationship between the amount of ventilation during tobacco combustion and the thermal conductivity of the cover material.

The difficulty of burning a cigarette when a cover is attached to a cigarette is related not only to the type of cigarette but also to the amount of ventilation and the thermal conductivity of the material of the cover.

The more airflow there is, the better the cigarette will burn; the less airflow, the more difficult it will be for the cigarette to burn, and the easier it will be to extinguish the flame.

In addition, if the thermal conductivity of the cover material is high, heat transfers easily to the cover material and heat dissipates quickly, making it difficult to continue combustion with only natural ventilation. Tobacco burns for a long time because it does not escape.

Based on the above, by keeping the total area of the ventilation holes in the cover to an appropriate level and restricting the amount of ventilation appropriately, the cover can be designed so that the cigarette will burn due to intermittent intake of air, but will naturally extinguish if you stop drawing air and leave it alone. In addition to increasing the safety of the cover material, if the thermal conductivity of the cover material is thick, the total area of the ventilation hole will be comparatively increased, helping the cigarette to burn; The total area can be relatively reduced and tobacco combustion can be suppressed.

The present invention has been made based on the above-mentioned theory, and its gist is to provide a cigarette safety cover 1, 2 as shown in the figure for covering a cigarette during smoking, with one end open and the other end closed. It is closed and consists of a cylindrical body with a plurality of ventilation holes (a) on the circumference, and the size of each ventilation hole (i) is such that the ashes and sparks of the cigarette 4 do not fall outside the cover. The total area of the cigarette 4 is suppressed to the extent that the cigarette 4 burns due to intermittent intake of air, and is naturally digested when the intake of air is stopped and left standing. They are characterized by increasing and decreasing the total area.

Here, the area of the ventilation hole refers to the area of the ventilable portion of the ventilation hole.

The cylindrical walls of the cover cylinders 1 and 2 are thin, and each vent hole is drilled straight regardless of the thickness of the cylindrical wall, so the area of the vent hole can usually be considered as the area of the vent hole along the outer circumferential surface. can.

FIG. 2 shows an embodiment of the cover made of aluminum, which has high thermal conductivity.

In this example, a cover 1 having ventilation holes is attached to a smoking vibe 3 to which a lit cigarette 4 is attached.

FIG. 1 is an enlarged sectional view of FIG. 2, and ( ) shows the part without ventilation holes.

The total length of cover 1 is 70mm, the diameter is 11mm,
The thickness is 0.3 tnm, the length of the part with ventilation holes on the side surface is 53 cm, and the width of the ventilation hole is 0.3 tnm.
mm, the cut depth is 4.25 mm, and the total number of ventilation holes is 60. When using the cover 1, the cigarette 4 continues to burn while inhalation is intermittent under normal smoking conditions, but when the inhalation is stopped. When left on paper spread out on a desk, the fire was extinguished without burning the paper.

Furthermore, if the vent hole is of the size described above, cigarette ashes and sparks will not fall out of the vent hole unless it is shaken vigorously.

In this way, since the size of each ventilation hole is limited, the present invention prevents cigarette ashes and sparks from leaking from the cover during smoking, and allows the total area of the ventilation hole to be used for smoking, while allowing natural extinguishment when left alone. Because of the regulation, in the case of smoking while sleeping, even if a person accidentally places a cigarette on top of a folded cigarette butt, there is no risk of burning the cigarette, making it extremely safe.

FIGS. 3 and 4 show an embodiment in which a cover 2 made of ceramic having low thermal conductivity is directly attached to a cigarette 4 with a single filter.

In this example, elongated ventilation holes are provided in the vertical direction of the cover 2. As in the previous example, each ventilation hole is large enough to prevent cigarette ashes and sparks from falling out, and is designed to allow ventilation. The total area of the pores is also suppressed to the extent that the cigarette burns due to intermittent intake of air, and naturally extinguishes when the intake of air is stopped and left alone.

In this example, only four slit-shaped ventilation holes are provided, and the total area of the ventilation holes is smaller than in the previous example, but this is because the thermal conductivity of ceramics is lower than that of aluminum.

The present invention reduces the total area of the ventilation holes to enable natural extinguishing of cigarettes, so the number of ventilation holes can be reduced, and as a result, safety is enhanced and the number of processing steps can be significantly reduced. .

The effect is particularly noticeable when a material with low thermal conductivity is used for the cover.

[Brief explanation of drawings]

1 and 2 show one example of the present invention, and FIGS. 3 and 4 separately. Figure 1 is an enlarged sectional view of Figure 2 (to) - (and).
The figure is a front view, and shows a vertical half of the cover in cross section with ventilation holes not shown. FIG. 3 is a longitudinal cross-sectional view, and FIG. 4 is a cross-sectional view of the portions of FIGS. 1.2...Cover, 3...Smoking pipe, 4...Tobacco,...Vent.

Claims (1)

[Claims] 1 A cover for covering a smoking cigarette, consisting of a cylindrical body with one end open and the other end closed, with a plurality of ventilation holes on the circumference, the size of each ventilation hole being adjusted to prevent cigarette ashes and sparks. The total area of the ventilation hole should be such that it does not fall outside the cover.
A cigarette characterized in that the cigarette burns due to intermittent intake of air, and is suppressed to the extent that it naturally extinguishes when the intake of air is stopped and left standing, and the total area of the ventilation holes is increased or decreased depending on the thermal conductivity of the material of the cover. Hazard prevention cover.