JPS584047Y2 - Gas lighter gas injection nozzle assembly - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a gas injection nozzle assembly for a gas lighter, and more particularly to a gas injection nozzle assembly with an improved seal structure.

The structure of a gas injection nozzle of a conventional gas lighter, particularly a disposable gas lighter, will be explained below with reference to FIGS. 1 and 2.

FIG. 1 is a longitudinal sectional view of a conventional gas injection nozzle assembly 1, and FIG. 2 is an enlarged longitudinal sectional view of the bottom of the gas injection nozzle assembly 1 shown in FIG.

This nozzle assembly 1 includes a nozzle screw 3 having an axially extending hole 2 therein, a pin-shaped nozzle 4 inserted into the hole 2, and a nozzle bottom 5.

The nozzle bottom 5 has a cylindrical shape as shown in the figure, and accommodates the bottom of the nozzle 4 therein and covers the bottom.

A valve rubber 6 having an inverted cross-sectional shape is press-fitted into the bottom of the nozzle 4.

An annular seal portion 7 that airtightly contacts the valve rubber 6 is integrally formed on the bottom inner surface of the nozzle bottom 5 .

As can be seen from the figure, the seal portion 7 has a so-called hook-like cross-sectional shape, and its protruding end portion 8 is in airtight contact with the bottom surface of the valve rubber 6.

The hole 2 is provided with an enlarged diameter portion 2a, thereby forming a shoulder portion 9.

This shoulder portion 9 is provided with an O-ring 10 for sealing between the inner wall of the hole 2 of the nozzle screw 3 and the outer wall of the nozzle 4.

An annular protrusion 11 is provided at approximately the center in the length direction of the nozzle 4, and a compression coil spring 12 is disposed between the protrusion 11 and an O-ring 10, and a compression coil spring 12 is arranged to connect the nozzle 4 to the nozzle bottom 5.
In the normal state, the valve rubber 6 and the seal portion 7 are kept in a sealed state to close the nozzle.

However, in the above-described sealing structure of this conventional nozzle assembly, if dust or the like adheres to the protruding end 8 of the sealing part 7, the sealing performance of that part deteriorates.
Even when not in use, there was a risk of gas leaking to the outside.

Therefore, an object of the present invention is to provide a gas injection assembly for a gas lighter in which the sealing performance between the valve rubber 6 and the seal portion 7 described above is improved.

In the gas injection assembly for a gas lighter of the present invention, a stepped portion is formed on the periphery of the bottom surface of the valve rubber to form concentric first and second sealing surfaces extending in the horizontal direction, and the sealing portion is The present invention is characterized in that the first and second annular protrusions each have a hook-shaped cross section and are in airtight contact with the sealing surface.

That is, the gas lighter assembly of the present invention is characterized in that the seal structure is a double seal structure.

According to the gas injection assembly of the present invention having the above-mentioned double seal structure, even if the sealing performance of one seal part deteriorates for some reason, it is possible to seal it with the other seal part. This eliminates gas leakage from the gas lighter when it is not in use.

The gas injection nozzle assembly 20 for a gas lighter according to the present invention will be described below with reference to FIG.

In this Figure 3, parts or parts having the same structure as the gas injection assembly shown in Figures 1 and 2 above include the first
, 2 are given as they are, and their explanation will be omitted.

In the nozzle assembly 20 of the present invention, a step 23 is formed on the periphery of the bottom surface 22 of the valve rubber 21 to form coaxial first and second sealing surfaces 24 and 25 extending in the horizontal direction.

The first sealing surface 24 has a circular shape, and the second sealing surface 25 has an annular shape.

In addition, a seal portion 22 provided on the inner surface of the bottom of the nozzle bottom 5
consists of first and second annular projections 26,27.

The shapes of the first and second annular protrusions 26 and 27 are similar to the shapes of the first and second annular protrusions.
Like the seal portion 7 shown in FIGS. , 2, the cross-sectional shape is hook-shaped.

The first annular protrusion 26 and the second annular protrusion 27 are in airtight contact with the first sealing surface 24 and the second sealing surface 25, respectively.

In the gas injection nozzle assembly 20 of the present invention, the first and second sealing surfaces 24.2 of the bottom surface 22 of the valve rubber 21
5 and the first and second annular protrusions 26 of the seal portion 22.
27, we have achieved a double seal structure with an extremely simple structure, and even if one seal part fails in some way, it will be reliably sealed by the other seal part, and therefore the sealing performance is extremely reliable. Become something.

Note that disposable gas lighters usually do not have a cover to cover the exposed top of the nozzle assembly, so if the seal is poor, the user may turn off the lighter after use. Even if you intend to do so, there is a possibility that gas will leak from this poorly sealed part, causing the fire to not go out or for the gas to leak out on its own, but with the nozzle assembly of this invention, This improved the gas leakage and ensured fire extinguishment.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a gas injection nozzle assembly of a conventional gas lighter, FIG. 2 is an enlarged longitudinal sectional view of the main parts of the gas injection nozzle assembly shown in FIG. 1, and FIG. 1 is a longitudinal cross-sectional view of the main parts of a gas injection nozzle assembly for a gas lighter according to the present invention; FIG. 21... Valve rubber, 22... Bottom, 23
...Stepped portion, 24°25...Seal surface,
26.27... Annular protrusion.

Claims (1)

[Scope of utility model registration request] A nozzle screw having a hole extending in the axial direction therein, a pin-shaped nozzle inserted into the hole, a cylindrical nozzle bottom that accommodates the bottom of the nozzle inside and covers the bottom, and a bottom of the nozzle. a valve rubber having a substantially inverted vertical cross-sectional shape attached to the valve rubber, and formed on the bottom inner surface of the nozzle bottom;
It consists of an annular sealing part that airtightly contacts the bottom surface of the valve rubber, and a stepped part is formed on the periphery of the bottom surface of the valve rubber to form concentric first and second sealing surfaces extending in the horizontal direction. and a gas injection nozzle for a gas lighter, characterized in that the sealing portion is formed into first and second annular protrusions having hook-shaped cross-sections and in airtight contact with the first and second sealing surfaces, respectively. assembly.