JPS605256Y2 - Safety device for spark discharge gas lighter - Google Patents

Description

[Detailed description of the invention] This invention uses a piezoelectric element or a battery as an ignition source to generate high voltage, and this high voltage is used as a spark discharge between the tip of a gas jet nozzle and a discharge electrode to ignite fuel gas. It concerns the safety device of lighters.

This type of spark discharge gas lighter can be ignited simply by moving the operating body exposed outside the case from the rest position to the ignition position, but when filling the fuel gas from the bottom of the case with the lighter upside down, There was a risk that the operating body would move and cause an unexpected explosion.

Therefore, various safety devices have been proposed that move the stopper when the lighter is turned upside down and lock the operation of the operating body, or that cut off part of the ignition circuit, but these devices do not allow the stopper to move. Since a guiding member is required, there is a drawback that the device becomes complicated and large.

In view of the above points, it is an object of the present invention to provide a safety device that has a simple structure and can be miniaturized.

Embodiments of the present invention will be described below based on the drawings.

1 and 2 show a first embodiment, in which a gas jet nozzle 2 fixed to a support 1 is connected to a fuel tank (
A discharge electrode 5 connected to a high voltage generator (not shown) is fixed to the insulating electrode stand 4 fixed to the support 1, and the tip of the discharge electrode 5 is connected to a high voltage generator (not shown). A discharge gap is formed between the coil 6 attached to the tip of the gas ejection nozzle 2.

A cylindrical body 7 having an engagement step 7a inside is slidably fitted around the gas ejection nozzle 2, and a cylinder 7 that engages with the engagement step 7a is attached to the upper part of the gas ejection nozzle 2. cylinder body 7
A stopper ring 8 is fixed to restrict the movement of.

Therefore, in normal use, as shown in FIG. 1, a discharge spark is generated between the discharge electrode 5 and the coil 6, and the fuel gas jetted from the gas jet nozzle 2 can be ignited by this discharge spark.

However, as shown in FIG. 2, when the lighter is upside down, the cylinder body 7 descends to the position where the engagement step 7a and the stopper ring 8 engage, so the tip of the gas jet nozzle 2 If the cylindrical body 7 is conductive, discharge sparks will occur between the discharge electrode 5 and the cylindrical body 7, and if the cylindrical body 7 is insulating, no discharge sparks will occur. Since there is no spark discharge between the discharge electrode 5 and the coil 6, no ignition occurs.

Therefore, when filling fuel gas with the lighter upside down, even if you accidentally operate the operating element (not shown) that performs both gas jetting and discharging operations, it will not ignite and the leaked fuel gas will ignite. There will be no explosion accident.

In the first embodiment, the lowering position of the cylinder 7 is regulated by the engagement step 7a of the cylinder 7 and the stopper ring 8, but it is not necessarily necessary to provide the engagement step 7a and the stopper ring 8, as shown in FIG. As in the second embodiment shown in FIG.
may be formed on a suitable member above the flange 7b, for example on the chassis 1.

Further, the cylinder 7 may be conductive or insulating;
When formed of conductive metal, as shown in Figure 4,
It is not necessary to cover the entire tip of the gas jet nozzle 2 with the cylindrical body 7.

That is, when the lighter is turned upside down and the barrel 7 is lowered,
If the cylinder 7 descends to a position where the distance between the discharge electrode 5 and the cylinder 1 is shorter than the distance between the discharge electrode 5 and the coil 6, spark discharge will occur between the discharge electrode 5 and the cylinder 7, which are at a shorter distance. It does not ignite.

As described above, the present invention provides a spark discharge gas lighter in which a discharge gap is formed between the tip of a gas jet nozzle and a discharge electrode, in which a cylindrical body is slidably fitted around the gas jet nozzle. When the lighter is upside down, the cylinder moves to the tip of the gas jet nozzle,
This cylindrical body can prevent spark discharge between the discharge electrode and the tip of the gas jetting nozzle, eliminating the risk of an explosion when filling the fuel gas, and the cylindrical body can be guided by the gas jetting nozzle and slide. Therefore, the structure is much simpler than that of conventional safety devices, and furthermore, since the space around the gas jet nozzle is utilized, the safety device can be made smaller.

[Brief explanation of the drawing]

Figures 1 and 2 show the first embodiment; Figure 1 is a cross-sectional view of the main parts in a normal state, Figure 2 is a cross-sectional view of the main parts when the lighter is upside down, and Figure 3 is a cross-sectional view of the main parts in a state where the lighter is upside down. Embodiment 2 is a cross-sectional view of the main parts in a normal state, and FIG. 4 is a cross-sectional view of the main parts in a state where the lighter is upside down in the third embodiment. 2... Gas ejection nozzle, 5... Discharge electrode, 7... Cylindrical body.

Claims (1)

[Claims for Utility Model Registration] 1. In a spark discharge gas lighter formed by forming a discharge gap between the tip of the gas jet nozzle 2 and the discharge electrode 5, a cylindrical body 7 is slid around the gas jet nozzle 2. A safety device for spark discharge gas lighters that is movably fitted. 2. The safety device for a spark discharge gas lighter as claimed in claim 1, wherein the cylindrical body 7 is made of a conductive metal.