JPH11201448A - Mixed gas combustion type lighter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate a fastening means such as screws by using a heat resistant metal material as a recognizing member for the combustion of mixed gas, maintaining an initial form even for a long time use, and making a combustion device of an assembly type. SOLUTION: A recognizing member 5 for combustion is made of a heat resistant alloy. The checking member 5 is formed of an annular attaching part and a red heat part composed of many long pieces located radially inside the attaching part. A combustion device 4 is constituted of the combination of an insulating lower cylindrical body 12 with a bottom having a mixing pipe 10 and a socket 11 which are integrally formed, a conductive diffuser 14 provided therein, a heat resistant and insulating combustion cylinder 15 whose lower part is inserted into the lower cylindrical body and upper part is extended to the upper part of the lower cylindrical body and an electrode ring 17 fitted to the opening end of the combustion cylinder 15. The checking member 5 is held between the electrode ring 17 and a fixing ring 16 in the fire port of a lighter to form an earth.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lighter for smoking in which a mixed gas of fuel gas and air is ignited and burned by a discharge spark in a combustion cylinder.

[0002]

SUMMARY OF THE INVENTION Fuel gas from a fuel tank is mixed with air by utilizing negative pressure generated by jetting.
In a lighter that ignites the mixed gas in a combustion cylinder with a closed bottom by a discharge spark, the combustion flame that rises from the lighter crater for complete combustion is pale and it is difficult to confirm in a bright place. A check member made of a metal wire (for example, a nichrome wire, a platinum wire, or a palladium wire) that is glowing red is provided in the crater where the open end of the combustion cylinder is located.

[0003] There are various forms of this confirmation member such as a net shape, a bridge shape, a spiral shape, etc., and in each case, since the material is a metal wire, expansion and cooling by heating (when used) and cooling (when not used). Due to repetition of shrinkage due to, deformation occurs gradually when used for a long time. Even if this deformation is in the crater, it is surprisingly noticeable at the time of use, and even if it is not noticeable with an inexpensive lighter, an expensive lighter requires replacement of the confirmation member as a defect. Often.

Accordingly, a first object of the present invention is to provide a gas mixture having a checking member in a crater which can sufficiently withstand long-term use even if the material of the checking member is metal and which maintains an initial shape. It is to provide a combustion type lighter.

As a means for igniting the mixed gas flowing out and diffused into the combustion cylinder, a spark caused by electric discharge is employed. This discharge is performed by a diffuser provided on the inner bottom surface of the combustion cylinder. A method in which a plus electrode protruding into the side of the combustion cylinder is used to discharge to the diffuser with the side being grounded (Japanese Patent Laid-Open No. 63-91)
431) and, on the contrary, a method in which the diffuser is used as a positive electrode and the cylinder side is grounded to discharge from the diffuser to the combustion cylinder side (see Japanese Patent Application Laid-Open No. 1-129570).

In the former, even if the cylinder has conductivity, current leakage can be prevented by insulating coating of the electrodes or by molding the cylinder with an insulator such as ceramic. However, in the latter case, the diffuser serving as the positive electrode and the combustion tube serving as the ground must be insulated from each other, and a discharge must be generated between the two. And the adoption of screwing, caulking, etc. for the compounding, the structure is more complex than the former, which enables the construction of a combustion cylinder with a single cylinder, and the assembly is troublesome. In other words, there is a problem that the accuracy is required for the processing and the cost is increased.

Accordingly, a second object of the present invention is to eliminate the need for fastening means such as screwing or caulking even if a discharge system in which the diffuser side is used as a positive electrode is employed. It is an object of the present invention to provide a mixed gas combustion type lighter having a combustion cylinder which can be constructed by only assembling members.

[0008]

According to the first object of the present invention, a fuel gas from a fuel tank is mixed with air by utilizing a negative pressure generated by jetting, and the mixed gas is subjected to combustion with a closed bottom. In the cylinder, it is ignited and burned by a discharge spark,
In a lighter having a combustion device provided with a member for confirming combustion by red heat at an open end, the material of the member for confirmation is made of a heat-resistant alloy, and the form is a plurality of elongated members which are integrally formed inside a mounting part and a mounting part and radially located. The heat-resistant alloy is composed of a red heat portion, and various known heat-resistant alloys can be used. Inconel of a Ni-Cr alloy is most preferable.

According to a second aspect of the present invention, there is provided an insulated bottomed cylinder having the above-described combustion device, which integrally has a downward mixing tube in the center of the bottom and a socket for a lead wire protruding from a side portion. Body, a conductive diffuser installed on the bottom surface of the lower cylinder and having the inside communicate with the mixing tube, and a lower portion inserted into a gap between the diffusion diffuser and the peripheral wall of the lower cylinder. With the upper part extended to the upper part of the lower cylinder, the heat-insulating combustion cylinder and the above-mentioned confirmation member are clamped and fixed by the fixing ring in the lighter crater, and the ground is formed by contact with the fixing ring. ,
And an electrode ring fitted in the open end of the combustion cylinder.

[0010] The mixing pipe has intake ports on both sides, and a fine gas gas outlet, a filter, and a flexible and thick connection tube are provided in a pipe below the intake port. The connecting tube is inserted into the fuel plug on the fuel tank to support the combustion cylinder upright.

In the above diffuser, the diffuser has a flange for forming a gap around the bottom of the thick-walled tubular body, and a seal ring is fitted on the bottom surface around the hole by fitting it into the annular groove. It comprises a seat body and a diffusion tube having a diffusion port on the side of the closed upper end, and airtightly fitted into the hole so that the diffusion port is exposed from above the seat body.

Further, the diffuser has a flange around the bottom for forming a gap, and an annular seat having a seal ring fitted to an annular groove on a bottom surface around the hole, and integrated with the annular seat. It is formed of a diffusion tube having a diffusion hole on the lower side of the closed upper end, and any of the above diffusers has a nozzle hole at the center of the closed upper end.

[0013] The fuel plug is juxtaposed with an opening / closing valve on a block-shaped valve pedestal mounted and fixed on a fuel tank and protruded from the pedestal, and communicates with the opening / closing valve through a fuel passage in the valve pedestal. That is.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the drawing, reference numeral 1 denotes a metal case of a lighter, which has a fuel tank 2 and a combustion device 4 arranged alongside a piezoelectric unit 3 on the fuel tank 2 therein.
The combustion device 4 has a member 5 for confirming combustion by red heat at the open end. The upper opening of the case 1 is provided with a confirmation member 5.
Is covered with a metal decorative cover 9 formed with a lighter crater 6 for accommodating therein and an accommodation hole 8 for an operator 7.

The checking member 5 includes a thin annular mounting portion 5.
a and a glowing portion 5c formed by a number of elongated pieces 5b of the same thickness that are integrally formed inside the mounting portion and radially located. In this embodiment, an Inconel plate of a Ni—Cr alloy having super heat resistance is adopted as a material of the checking member 5, and a thin plate having a thickness of about 0.1 to 0.2 mm is etched by 6.7 mm in outer diameter and 6.7 mm in inner diameter. A 5.8 mm annular mounting portion 5a,
2. A length that is integrally formed inside the mounting portion and located radially.
Glowing part 5c with eight strips 5b of 8mm and 0.3mm width
The confirmation member 5 is formed of the following.

As shown in FIG. 2 in detail, the combustion device 4 has a mixing tube 10 integrally formed downward at the center of the bottom and a socket 11 for receiving the tip of the lead wire 3a of the piezoelectric unit 3 on one side. An insulating bottomed lower cylinder 12 made of a protruding synthetic resin (for example, polyamide, ABS resin, or the like), and a lower cylinder 12 installed on the bottom surface 12a of the lower cylinder 12 to communicate the interior 13 with the mixing pipe 9. The lower part is inserted into the gap between the metal conductive diffuser 14 and the peripheral wall of the lower cylinder 12, and the upper part is provided with an O-ring 15 a at the upper part of the lower cylinder 12. The confirmation member 5 is sandwiched and fixed by a heat-insulating combustion cylinder 15 made of ceramics extended and fitted into an opening end of the combustion cylinder 15 and a fixing ring 16 in the lighter crater 5.
And an electrode ring 17 that forms an earth by contact with the fixing ring 16.

The mixing pipe 10 has suction ports 18 on both sides, and a fine gas gas discharge port 19, a filter 20 and a flexible resin made of silicone resin are provided in a pipe below the suction port 18. And a thick connecting tube 21 in order. The connecting tube 21 is inserted into a fuel plug 22 above the fuel tank 2 to support the combustion cylinder 12 upright in a case immediately below the lighter crater 6. ing.

The diffuser 14 is composed of a seat 14a made of a thick tubular body and a diffusion tube 14b fitted in a hole thereof. A flange having substantially the same inner and outer diameters as the lower cylindrical body 12 is integrally formed around the bottom of the seat body 14a, and a seal ring 23 is fitted on the bottom surface around the hole so as to fit into the annular groove. .

The diffusion tube 14b is closed with one end of the cylindrical body having the same outer diameter as the hole diameter of the seat 14a as an upper end, an electrode 14c is protruded from the closed upper end, and a diffusion port 14d is formed on both sides. The diffuser 14 is formed by a perforated hollow body, and is hermetically fitted into a hole so that the diffusion port 14d is exposed from the seat 14a.

The diffuser 114 shown in FIG. 6 is used as a cigar lighter or the like which requires a high heating power for ignition. The diffuser 114 has an annular seat body 114a having a flange around the bottom, a lower end with a closed upper end. Diffusion tube 1 in which diffusion holes 114c are formed
14b and the nozzle 1 in the center of the closed upper end.
14 shows another embodiment in which 14d is perforated.

The fuel plug 22 is screwed into an upper portion of a block-shaped valve pedestal 25 mounted and fixed on the fuel tank 2 and projected on the pedestal in parallel with the opening / closing valve 26.
A fuel passage 27 in the valve seat communicates with the on-off valve 26.

In the above configuration, the lower cylinder 12 is connected to the diffuser 14
And, as a receiving member of the combustion cylinder 15, they are sequentially assembled into the lower cylinder 12, and then the electrode ring 17, which is fitted to the crater ring 16 and holds the confirmation member 5, is attached to the combustion cylinder 1.
The combustion device 15 can be configured simply by fitting it into the opening end of the combustion device 5.

The combustion tube 4 is installed upright on the fuel tank 2 by fitting the connection tube 21 exposed from the lower end of the mixing tube 10 deeply into the fuel plug 25 projecting from the upper surface of the valve seat 25. The electric connection between the lead wire 3a of the piezoelectric unit 3 and the diffuser 14 can also be performed by inserting the lead wire tip into the socket 11 and then pushing it in when fitting the fuel plug 25 into the fuel plug 25. , The need for screwing, caulking, etc., as in the past, is eliminated, so that the assembly of the combustion device 4 does not require any trouble.

Since the assembled combustion cylinder 12 is supported upright in the case immediately below the lighter crater 6,
When the decorative cover 9 is fitted into the case opening and covered, the crater ring 6 fits inside the lighter crater 6 to hold the upper part of the combustion device 4 and the O-ring 15a and the seal are pressed by the pressing force when fitted. The rings 23 and the like are compressed to maintain airtightness and prevent gas leakage, while their cushions prevent rattling.

In use, the fuel gas (liquefied gas) flowing into the mixing pipe 10 via the fuel plug 24 by opening the valve.
, The air is taken in from the intake port 18 to become a mixed gas, flows out of the diffusion port 14d on the side of the diffuser 14 and diffuses into the combustion cylinder, and the inside of the firing cylinder 15 becomes an atmosphere of the mixed gas.

In such a state, the piezoelectric unit 3
When the high voltage electricity is generated by the operation of the above, the electric current flows from the upper end of the diffuser 14 via the lead wire 3a to the electrode at the open end forming an earth by an electric connection with the decorative cover 9 and the case 1. A discharge is generated in the ring 17 to generate a spark, and the mixed gas diffused by the spark is ignited and burned.

Most of the combustion of this mixed gas is carried out inside the combustion tube 15, and although a pale flame rises only from the lighter crater 6 for a short time, the eight strips radially located in the crater due to the combustion. Since 5b is heated and glows red, combustion can be confirmed by the glow. The red heat of the strip 5b is more remarkable as the thickness thereof is thinner.
Since it becomes difficult to confirm red heat as the thickness exceeds 0 mm, the thickness of the strip 5b is most preferably 1.0 mm from the viewpoint of processing.

In the diffuser 114 shown in FIG. 6, since the mixed gas ejected from the central nozzle 114d also burns, the combustion in the combustion cylinder is a combined combustion of the diffused mixed gas and the mixed gas before diffusion, and the lighter crater Although the pale flame rising from 6 becomes longer, it is still difficult to confirm directly, and therefore, the confirmation of combustion is also made by a large number of strips 5b.
The red heat.

The heat-resistant alloy confirmation member 5 made of Inconel or the like is an alloy having good heat resistance in an oxidizing gas flow, and thus does not deform even after long-term use and maintains its initial shape. This solves the conventional problem that the deformation of the confirmation member 5 is regarded as a defect of the lighter, and the cost can be reduced because the plate member can be easily formed by stamping.

Further, according to the present invention, the screwing and caulking are not required for assembling the combustion apparatus 4, so that the processing of the constituent members becomes easy, and especially, the connection between the mixing pipe 10 and the diffuser 14 Need only be placed on the bottom surface of the lower cylindrical body 12 serving as a receiving member, so that the joint with the mixing pipe 10 does not require any trouble, and the lower cylindrical body 12 can be integrated with the mixing pipe 10 and the socket 11. Since the molding can be performed with high precision by one molding, the evaluation of a mixed gas combustion type lighter generally called an internal combustion lighter can be further enhanced.

[Brief description of the drawings]

FIG. 1 is an upper longitudinal sectional view of a mixed gas combustion type lighter according to the present invention.

FIG. 2 is an enlarged vertical sectional view of the above combustion device.

FIG. 3 is an exploded perspective view of the combustion device of FIG. 2;

FIG. 4 is a plan view of FIG. 1;

FIG. 5 is a plan view of a combustion confirmation member.

FIG. 6 is a longitudinal sectional view of a combustion device according to another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Case of lighter 2 Fuel tank 3 Piezoelectric unit 3a Lead wire 4 Combustion device 5 Combustion confirmation member 6 Lighter crater 9 Decorative cover 10 Mixing tube 11 Socket 12 Lower cylinder 14 Diffuser 15 Combustion cylinder 16 Tinder ring 17 Electrode ring 21 Connection Tube 22 Fuel plug 25 Valve base

Claims (7)

[Claims] 1. A fuel gas from a fuel tank is mixed with air by using a negative pressure generated by jetting, and the mixed gas is ignited and burned by a discharge spark in a combustion cylinder having a closed bottom, and is heated by red heat. In a lighter having a combustion device provided with a combustion confirmation member at an open end, a material of the above-mentioned confirmation member is made of a heat-resistant alloy, and the form is formed by a plurality of strips which are integrally formed inside a mounting portion and the inside of the mounting portion and are radially positioned. A mixed gas combustion type lighter comprising a red hot part. 2. A fuel gas from a fuel tank is mixed with air by using a negative pressure generated by jetting, and the mixed gas is ignited and burned by a discharge spark in a combustion cylinder having a closed bottom, and is heated by red heat. A lighter having a combustion device provided with a combustion confirmation member at an open end, the combustion device having an insulating property in which a downwardly-facing mixing tube is integrally provided at the bottom center and a lead wire socket is protrudingly provided at a side portion. A lower cylindrical body at the bottom, a conductive diffuser installed on the bottom surface of the lower cylindrical body and having the inside communicate with the mixing pipe, and a lower side in a gap between the diffuser and the peripheral wall of the lower cylindrical body. Insert the part and insert the upper part into the upper part of the lower cylinder.Then, the heat-insulating combustion cylinder is sandwiched and fixed by the fixing ring in the lighter crater, and the ground is brought into contact with the fixing ring. Electrode electrode fitted into the open end of the combustion cylinder to form Mixed gas combustion type lighters that characterized by being composed of a grayed. 3. The mixing pipe has intake ports on both sides, and a fine gas gas outlet, a filter, and a flexible and thick connection tube are provided in a pipe below the intake port. A mixed gas combustion type lighter characterized by comprising a connecting tube inserted into a fuel plug on a fuel tank to support a combustion cylinder upright. 4. A seat body having a flange for forming a gap around a bottom of a thick-walled tubular body, and a seal ring fitted on a bottom surface around the hole by fitting the seal ring into an annular groove. 3. The mixed gas combustion according to claim 2, wherein the closed upper end has a diffusion port on a side portion thereof, and the diffusion port comprises a diffusion tube which is fitted in a hole portion so as to be exposed from above the seat body. Expression writer. 5. A diffuser having a flange around a bottom for forming a gap, a seal ring fitted on a bottom surface around a hole and fitted to an annular groove, and an annular seat on the annular seat. The mixed gas combustion type lighter according to claim 2, comprising a diffusion tube integrally formed and having a diffusion hole on a lower side of a closed upper end. 6. The lighter according to claim 4, wherein the diffuser has a nozzle hole at the center of the closed upper end. 7. The fuel plug is arranged on a block-shaped valve pedestal mounted and fixed on a fuel tank and juxtaposed with an opening / closing valve and protruded from the pedestal. The fuel plug communicates with the opening / closing valve through a fuel passage in the valve pedestal. 4. The method according to claim 3, wherein
A mixed gas combustion type lighter as described.