JP3189435B2 - Waterproof portable light - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an explosion-proof and explosion-proof structure of a waterproof portable electric lamp which is used underwater or in the rain, using a dry battery as a power source, in particular, a main body case for housing the battery.

[0002]

2. Description of the Related Art FIG. 3 is a side sectional view of a conventional waterproof portable light.

As shown in FIG. 3, a conventional waterproof portable light comprises a front base 1 provided with a lens, a reflector 3 having a hemispherical portion in which a bead ball 2 is arranged in the center, and a plurality of light emitting devices. Resin body case 6 provided with battery housing 5 for housing dry battery 4
And a switch 7 for energizing the bead ball 2 and the battery 4.

[0004] Here, the main body case 6 is molded in a trumpet shape, and the front base 1 to which the reflection plate 3 is connected is fitted into the opening.

[0005] In addition, above the opening of the main body case 6,
A switch 7 is provided. Here, O-rings 8 are attached to the fitting portion between the main body case 6 and the front base 1 and to the mounting portion of the switch 7 in the main body case 6, respectively, when these lights are used in water or in rain. To prevent water from flowing into the lamp through the gap.

In the opening of the main body case 6,
A holder 9 having a bead ball socket is connected to the reflection plate 3. The holder 9 is provided with a contact piece 10 led from the battery 4 and a contact piece 10 led from the bean ball 2 stored in the main body case 6 in a non-contact state.
Is turned on, the contact pieces 10 are brought into contact with each other, and the battery and the bead ball are energized.

[0007]

However, in a waterproof portable light using three or more dry batteries connected in series,
If power is supplied while one dry battery is incorrectly connected in the reverse direction, only that battery is charged by another battery.

Here, usually, in a dry battery, manganese dioxide (MnO ₂ ) is used for the positive electrode, zinc (Zn) is used for the negative electrode, and zinc chloride (ZnCl ₂ ) and ammonium chloride (NH ₄ C) are used for the electrolyte.
An aqueous solution in which 1) is dissolved is used.

When this dry battery enters an unfavorable state of charge, a large amount of hydrogen gas and oxygen gas are generated mainly by electrolysis of water in the electrolytic solution. Further, in the latter half of the electrolysis of water, nitrogen gas and the like were generated by decomposition of ammonium chloride (NH ₄ Cl) and zinc chloride (ZnCl ₂ ) contained in the electrolytic solution.

In the state where only some of the batteries are connected in the reverse direction as described above, the bean balls are lit a little darker but continue to be lit, so that the user of the lamp is
In some cases, the user continued to use the light without noticing that the battery was incorrectly connected in reverse.

[0011] Gases such as hydrogen and oxygen generated during use of the lamp fill the inside of the battery and then leak out of the battery through gaps formed in the caulked portion of the battery, and gradually enter into the body case of the lamp. Had accumulated.

Furthermore, the waterproof portable light has a sealed structure to prevent water from entering from the outside, which also prevents the gas inside the battery from being released to the outside.

Accordingly, gas such as hydrogen and oxygen leaked from the battery connected in the body case in the opposite direction is not discharged from the battery housing portion of the body case to the outside of the case but is fully accumulated in the body case. Was.

When the switch of the portable light is operated, the contact piece led from the battery and the contact piece led from the bean ball are exposed inside the main body case. If a spark is generated inside the main body case, for example, when the lamp falls, the spark ignites the charged and accumulated gas, and there is a risk that the lamp explodes.

When the lamp is filled with a gas such as hydrogen or oxygen, gas pressure is applied to both contact pieces for energizing the battery and the bead ball, and a strain is generated in the portion, and when the switch is turned on, Poor contact was sometimes caused between both contact pieces.

The present invention solves such a problem. In a waterproof portable light using three or more dry batteries, when one battery is erroneously connected in the reverse direction and energized, An object of the present invention is to provide a waterproof portable light capable of preventing gas such as hydrogen and oxygen generated from a battery connected in a reverse direction from being filled in the light.

[0017]

In order to solve the above-mentioned problems, a waterproof portable light according to the present invention comprises a front base provided with a lens and a reflector having a hemispherical portion in which a bead ball is arranged in the center. And a main body case having a battery housing section for housing a plurality of power batteries, and a switch for energizing the bead ball and the battery, and a part of the main body case, a battery housing section and the outside of the main body case. Provide a vent to vent the, this vent,
It is covered with a microporous film that is permeable to air but impermeable to water.

[0018]

In the waterproof portable light according to the present invention, a vent is provided in a part of the main body case having the battery housing to ventilate the battery housing and the outside of the main body case, and air is transmitted through the vent. However, a microporous film that does not transmit water is provided.

Therefore, when one battery is erroneously connected in the reverse direction and energized in the main body case containing three or more dry batteries, one battery in the reverse direction to the other is charged. Even if a large amount of gas such as hydrogen or oxygen is generated in the battery and leaks from the battery into the body case, these gases pass through the pores of the microporous film provided in part of the body case. Since it is released outside the case, it does not fill the inside of the main body case.

Further, since the microporous film does not transmit water, even when the portable electric lamp is used in water or in the rain, water flows into the inside of the main body case from the pores of the microporous film and impairs the function. Never.

[0021]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a side sectional view of a waterproof type portable light according to the present invention, and FIG. 2 is a partially enlarged view of a rear portion of a main body case.

As shown in FIGS. 1 and 2, in the waterproof portable light of the present invention, a main body case 6 made of ABS (acrylonitrile-butdiethane-styrene copolymer) resin and accommodating four AA batteries. A vent 11 is provided in a part of the bottom surface of the substrate, and the vent 11 is covered with a polypropylene microporous film 12 having a pore diameter of 0.1 μm and a thickness of 50 μm.

Here, the ratio of the vent 11 to the bottom area of the main body case 6 is about 30%.
In FIG. 1, the microporous film 12 is provided at a position near the inner wall of the main body case to prevent the film 12 from being broken by an impact when an electric lamp falls or the like.

The main body case 6 of the present invention is manufactured as follows. First, in a mold in which the outer frame of the main body case 6 is molded, the upper surface of the convex portion forming the vent 11 is
The previously prepared microporous film 12 is placed. Then, a mold obtained by molding the inner frame of the main body case 6 is set inside the mold obtained by molding the outer frame. Then, the ABS resin raw material is heated and melted, and injected and injected between the two dies to cool and solidify. Then, both the dies are opened to form the main body case 6.
Take out.

In the waterproof portable light of the present invention using the main body case manufactured as described above, in the main body case containing three or more dry cells, one dry cell is erroneously connected in the opposite direction to the other. If the battery is energized for a long time, the battery connected in the opposite direction will be charged and a large amount of gas such as hydrogen or oxygen will be generated in the battery, and even if it leaks out of the battery into the main body case, these gases will be charged. Is released from the pores of the microporous film 12 provided at the bottom of the main body case to the outside of the main body case.

Therefore, it is possible to avoid the danger that the hydrogen gas and the oxygen gas are filled and accumulated in the main body case, and a spark generated when the switch is operated ignites these gases to explode the electric lamp.

Further, since the microporous film does not transmit water, water does not flow into the main body case even when the lamp is used in water or rain as a waterproof type.

In this embodiment, the microporous film is provided near the inner wall of the main body case side of the ventilation hole to protect it from damage. However, the strength of the entire main body case and the strength of the film portion are further improved. In order to increase the thickness, a film of this type may be stacked in a two- or three-layer structure and provided integrally with the main body case by the same injection molding as described above.

[0030]

As described above, in the waterproof portable electric light of the present invention, a vent for ventilating the battery housing and the outside of the main body case is provided in a part of the main body case having the battery housing. The vent is covered with an air-permeable and water-impermeable microporous film. Therefore, if the lamp user mistakenly connects one of the batteries in the body case in the reverse direction and continues using the lamp without noticing it,
Even if a large amount of gas such as hydrogen or oxygen is generated in the battery connected in the opposite direction and leaks from this battery into the main body case,
Since these gases are released from the pores of the microporous film to the outside of the main body case, they do not fill the inside of the main body case.

Therefore, it is possible to avoid the danger that a spark generated at the time of a switch operation or the like of these gases ignites and the electric lamp explodes, thereby improving safety.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a waterproof portable light according to the present invention.

FIG. 2 is a partially enlarged view of a rear part of a main body case of the portable light.

FIG. 3 is a side sectional view of a conventional waterproof portable light.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 front base 2 bead ball 3 reflector 4 battery 5 battery housing 6 main body case 7 switch 8 O-ring 9 bead ball holder 10 contact piece 11 vent 12 microporous film

Claims (2)

(57) [Claims] 1. A front base having a lens, a reflector having a bean ball disposed in the center, a main body case having a battery housing for housing a plurality of power batteries, and energization of the bean ball and a battery And a switch for performing ventilation between the battery housing portion and the outside of the main body case. The vent hole is air-permeable and water-impermeable microporous. Waterproof portable light covered with conductive film. 2. The waterproof portable light according to claim 1, wherein a plurality of microporous films are stacked in the vent.