JP2538006Y2 - Structure of automatic fire extinguishing nozzle for gas lighter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a structure of a combustion nozzle of a gas lighter, particularly a nozzle provided with an automatic fire extinguishing device inside.

[Prior Art] FIGS. 3, 4, and 5 are presented as conventional techniques.

FIG. 3 is a partial view of the vicinity of a combustion valve of a filer / ignite ignition type lighter, showing a state in which an automatic fire extinguishing device is assembled inside a nozzle rod. FIGS. 4 and 5 show a state in which an automatic fire extinguishing device is incorporated in a valve rod (nozzle cylinder), and are used in a proposal we have already made. Since the combustion valve has been described above, it will be briefly described.

FIG. 3 shows an example of a file / ignite type and a non-adjustable flame length type. (The piezo ignition method does not differ from the gist of the proposal.) 1 is a fuel tank, and 1a is an upper wall of the tank. The gas in the tank is regulated by the flow regulating member 2 and flows out of the through hole 3, but when not in use, the valve 4 (first valve) is moved by the repulsive force of a spring (not shown in this figure).
Is closed. The igniting stone 11 is constantly pressed against the file 10 by the stone pushing spring 12, and when the user rotates the file, the igniting stone 11 is shaved while generating heat, and scatters above the gas ejection hole 5a while burning as a spark. The user simultaneously pushes down one end of the gas valve opening lever 9 (this part is omitted in FIG. 3), so that the opposite end lifts the valve rod 5 and the valve 4 is opened. The gas flows through the through hole 3 around the rod, enters the inside through the lateral hole 5b, and exits through the ejection hole 5a. At this time, the flame is ignited by the above-mentioned spark. The O-ring 7 is located between the tank wall and the rod by a cap 8 and prevents gas from leaking out from around the rod during use. The shape memory alloy coil 14 and the valve 13 (second valve) are installed inside the stick 5 as an automatic fire extinguishing device. When abnormal intermittent combustion occurs and the temperature of the nozzle stick rises, the alloy coil 14 is turned off. Extension valve 13
Is pressed against the lower end of the ejection hole 5a to stop the gas flow, so that the flame is immediately extinguished and the safety is ensured. Reference numeral 15 denotes a return spring for restoration.

FIGS. 4 and 5 show an example in which an automatic fire extinguishing device using a shape memory alloy coil is incorporated in a nozzle rod. In this structure, the bottom plug 6 holding the elastic valve 4 is press-fitted to the lower end of the stick 5. The valve 13 and the return spring 15 are assembled to the alloy coil 14, and the other end of the coil is connected to the upper part of the bottom plug 6 (the fourth
(Fig. 5) or a part of the stick (Fig. 5). According to this configuration, the conventional rod assembly is increased from the two parts of the rod and the valve to four parts to six parts (in the case of training with the shape memory alloy coil to make it bidirectional, no return spring is required) And an increase of 3 parts).

FIG. 4 shows an example in which the valve movement by the alloy coil is upward with the lower end locked and the return spring is used.
The figure shows an example in which the upper end is locked, the valve moves downward, and there is no return spring. The direction of movement of the valve and the presence or absence of the return spring can be arbitrarily selected.

[Problem to be solved by the invention] In order to make a nozzle with an automatic fire extinguishing function, it is inevitable that there is a part to be added to the conventional one, but how to reduce the increase is easy, parts are easy to manufacture, Further, how to facilitate the assembling work is an essential condition for securing a low cost in mass production. In addition, as long as the purpose of safety is to prevent accidents, these conditions must be satisfied in order to ensure reliable operation. Conventionally, the gas passage into the valve stick has often been made by processing a horizontal hole, a groove, or the like. We intend to solve these issues with this proposal.

[Means for Solving the Problems] To solve the problem, we consider the shape of the valve 4 (first valve, commonly known as valve rubber) that the gas lighter originally has, and pass the gas through.
4a, the alloy coil 14 is press-fitted at the end thereof, and a valve 13 (second valve) and a return spring 15 are also added to form a sub-assembly. Suggest the structure to be completed.

That is, the structure of the automatic fire extinguishing nozzle for a gas lighter of the present invention has a nozzle hole having a nozzle hole at the tip end and a fuel gas internal passage formed therein and communicating with the nozzle hole, and the nozzle rod moves into the nozzle valve rod. A second valve arbitrarily provided to open and close a closing portion in the middle of the fuel gas internal passage, the temperature being lower than a predetermined temperature provided in the nozzle rod and having one end fixed to the second valve; And holding the second valve at a position distant from the closing portion and deforming when the temperature exceeds a predetermined temperature, moving the second valve to the closing portion, and moving the fuel gas internal passage by the second valve. A shape memory alloy coil that closes the bottom end surface of the nozzle rod, and closes a gas discharge hole through which the fuel gas is discharged from a tank storing the fuel gas when the lighter is not used, and discharges the gas when the lighter is used. A cover for opening a hole, and a fixing portion for fixing the other end of the shape memory alloy coil opposite to the one end to which the second valve is fixed. Into the fuel gas internal passage, the fuel gas being derived from the gas discharge hole formed in communication with the lid and the insert. An elastic first valve having a guide groove is provided.

Here, the fixing portion may be formed in a columnar shape, and the inner surface of the other end of the shape memory alloy coil may be pressed against the fixing portion, or the fixing portion may be formed in a cylindrical shape, and the fixing portion may be formed in a cylindrical shape. The outer surface of the other end of the shape memory alloy coil may be pressed against the portion.

Further, in the structure of the automatic fire extinguishing nozzle for a gas lighter of the present invention, the second valve provided in the nozzle rod and having one end fixed to the second valve and moved to the closing portion is connected to the closing portion. A structure having a return spring that is dissociated from the spring may be used.

[Operation] According to the above-described means, the valve rubber (the first valve) is essentially an essential part, so the number of parts can be increased only by three points of the alloy coil, the valve (the second valve), and the return spring. In addition, the gas passage need not be processed in the valve stick (if the alloy coil is made bidirectional, the number of parts can be increased by only two points). Valve rubber (1st
Valve), alloy coil, valve (second valve), and in some cases, a sub-assembly by adding a return spring, and incorporating this into a valve rod is a reasonable and well-operational procedure. This is advantageous for both work and automatic mechanization. As a result, an automatic fire-extinguishing nozzle that can be easily and repeatedly repeated with a minimum number of parts can be completed, which greatly benefits the purpose.

[Example] FIGS. 1 and 2 are shown as examples.

FIG. 1A is a perspective view for explaining installation. Combine the return spring 15 (if the alloy coil 14 is made bidirectional), the second valve 13, the alloy coil 14, and the first valve 4, and then assemble it into the nozzle rod 5. Is shown. FIG. 1B is a sectional view showing a completed state.

The first valve 4 is formed of an elastic body, and has a groove 4a as a gas passage. A lid 4b for covering the bottom end face of the nozzle rod 5 is formed in the lower part of the first valve 4 in FIG. The lid 4b also has a role of closing the gas outlet hole from which the fuel gas is led out of the tank storing the fuel gas when the lighter is not used, and opening the gas outlet hole when the lighter is used.

The first valve 4 has an insert 4c extending from the lid 4b into the nozzle rod 5, and held on the inner wall of the nozzle rod 5 by frictional force with the inner wall. Its insert
At the tip of 4c, a columnar fixing portion 4d that holds the lower end of the shape memory alloy coil 14 in FIG. 1 is formed.

FIG. 2 shows an example in which the nozzle rod is not formed as a single unit, but is formed as two parts, namely, a main cylinder portion 5 'into which an automatic fire extinguishing device is incorporated and an ejection hole portion 5 "having a heat collecting fin 5c at the tip, and press-fitted. As in FIG. 1, A is a perspective view for assembling and describing,
B is a completed sectional view.

The difference between the first valve 4 shown in FIG. 2 and the first valve 4 shown in FIG. 1 is that the fixing portion 4d is formed in a cylindrical shape and the outer surface of the end of the shape alloy coil 14 is formed. Is pressed against the fixing portion 4d.

The functions are briefly described below. If the use of the lighter was continued for more than a few seconds, or the user thought that the operation was terminated and the fire was extinguished, the first valve 4 was incompletely closed for some reason and the flame remained and continued burning. In any case, when the nozzle cylinder overheats and the internal alloy coil 14 reaches the transformation point temperature, the coil 14 rapidly expands to recover its original memory shape, and the second valve attached to the tip end Since the gas flow is stopped by pressing 13 against the gas outlet, the flame is immediately extinguished and no further overheating occurs, preventing the occurrence of disaster. The fin 5c at the tip of the nozzle in the embodiment of FIG.
This is to ensure that the fire extinguishing operation can be performed quickly and reliably. On the other hand, after the flame has been extinguished, it can also be used as a radiation fin to shorten the recovery time.

As described above, FIG. 1 and FIG.
Of course, there may be still different examples of the structure according to the gist of the invention, and depending on the detailed design and size of the parts, even in the assembly procedure, the parts of the automatic fire extinguishing system may not be assembled first, but individually. It may be advantageous to incorporate the

[Effects of the Invention] As is clear from the above description, the present invention makes it possible to efficiently produce a repeatable automatic fire extinguishing nozzle for a gas lighter with a minimum number of additional parts. Higher safety gas lighters can be mass-produced.

[Brief description of the drawings]

FIG. 1A is a perspective view of a part for explaining the assembly of the first embodiment. FIG. 2B is a sectional view of the same for assembling. FIG. 2A is a perspective view of a part for explaining the assembly of the second embodiment. Fig. 4 Cross-sectional view showing an example in which an automatic fire extinguishing device is incorporated in a nozzle rod Fig. 5 Cross-sectional view of another example, the same as Fig. 4 1. Fuel tank 1a ... Tank wall 2 ... Flow rate ( Flame length) adjusting member 3 gas through hole 4 valve (first valve) 4a gas passage 5 valve rod nozzle 5 'valve rod main cylinder 5 "discharge port (collection) 5a… Nozzle ejection hole 5b… Horizontal valve hole (gas passage) 5c… Heat collecting (radiation) fin 6… Bottom plug 7… O-ring 8… Gap 9… Gas valve Release lever 10 File 12 File igniter 12 Stone pushing spring 13 Valve (second valve) 14 Shape memory Gold coil 15 ...... return spring

Claims (4)

(57) [Scope of request for utility model registration] 1. A nozzle rod having a nozzle hole at a tip end and having a fuel gas internal passage formed therein and communicating with the nozzle hole, wherein the fuel rod internal passage is movably provided in the nozzle valve rod. A second valve for opening and closing a middle closing portion so as to be able to open and close; and a second valve provided in the nozzle rod and having one end fixed to the second valve and closing the second valve at a predetermined temperature or lower. And a shape memory alloy coil that deforms when the temperature exceeds a predetermined temperature, moves the second valve to the closing portion, and closes the fuel gas internal passage by the second valve, and A cover that covers a bottom end surface of the nozzle rod, closes a gas outlet hole through which the fuel gas is led out of a tank storing the fuel gas when the lighter is not used, and opens the gas outlet hole when the lighter is used; Shape memory alloy An insert extending from the lid into the nozzle rod and held by the nozzle rod, the rod having a fixing portion for fixing the other end of the oil valve opposite to the one end to which the second valve is fixed. A first valve of an elastic body having a groove formed to communicate the fuel gas derived from the gas discharge hole into the fuel gas internal passage formed in communication with the lid and the insert. The structure of an automatic fire extinguishing nozzle for a lighter, comprising: 2. The automatic fire extinguishing nozzle for a lighter according to claim 1, wherein the fixing portion is formed in a columnar shape, and the inner surface of the other end of the shape memory alloy coil is pressed against the fixing portion. Structure. 3. An automatic fire extinguishing nozzle for a lighter according to claim 1, wherein said fixing portion is formed in a cylindrical shape, and said outer surface of said other end of said shape memory alloy coil is pressed against said fixing portion. Structure. 4. A return spring provided in the nozzle rod and having one end fixed to the second valve and disengaging the second valve moved to the closing portion from the closing portion. The structure of the automatic fire extinguishing nozzle for a gas lighter according to claim 1.