WO2003098112A1

WO2003098112A1 - Filter structure of igniter

Info

Publication number: WO2003098112A1
Application number: PCT/JP2003/005978
Authority: WO
Inventors: Toshihiro Ichikawa; Yuzo Ochiai; Hiroyuki Honma
Original assignee: Tokai Corporation
Priority date: 2002-05-21
Filing date: 2003-05-14
Publication date: 2003-11-27
Also published as: CN100385171C; JP2003336840A; AU2003234801A1; CN1656342A; US20050175947A1; JP3867851B2; EP1533570A1; EP1533570A4

Abstract

A filter structure where a flame length is stabilized without adjustment by the stabilization of gas permeability and excellent assembling is enabled. Fuel gas received in a tank chamber (24) is sent through a filter (71) for quantifying the amount of permeation gas and through a valve mechanism (4) for opening and closing the supply of the gas, and then jetted from a jet nozzle (3) for burning. The filter (71) is formed by laying over each other a membrane (71a) having fine holes and for quantifying the amount of permeation gas and a porous body (71b) having gas permeability. A filter component (7) that is formed by the filter (71) and a holder (72) fitted to the filter is assembled in position before the valve mechanism (4) is assembled. The holder (72) has a gas vent opening (72c) at its center. The filter (71) is welded to the peripheral edge portion of the gas vent opening (72c). The membrane (71a) and porous body (71b) in the air vent opening (72c) are not joined to each other.

Description

Akira Itoda Filter structure for igniters

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an igniter that ignites and burns gas ejected from an ejection nozzle, and relates to a filter structure that quantifies a gas flow rate and does not require flame length adjustment.

Conventional conventional low-priced lighters, ignition rods, and other igniters use a method in which the amount of gas emitted, that is, the flame length, is adjusted with a knob, and a special filter, that is, a flow control film that allows a fixed amount of gas to pass through. A non-adjustable type that does not require flame length adjustment by using a membrane membrane of the type described above is known.

As one example of the structure of the non-adjustable filter, as shown in Japanese Patent Publication No. 63-21092, the filter is configured as a pressure reducing means using a membrane film made of a porous film. This filter structure has a two-layer structure consisting of a membrane film (semi-porous film) having micropores with a pore radius of 200 to 500 nm and a backing porous film adhered to the upper surface. I have. The membrane film has a structure in which it is sandwiched between a cylindrical member and a support member and hermetically fixed between the liquid fuel tank of the igniter and the space downstream of the outlet. As another structure of the filter, as shown in JP-B-4-1123636, a membrane membrane (gas permeable metering disc) is used as a control device, and a clamping disc and its surroundings are enclosed. There is a structure that is sealed and fixed by force crimping on the part.

In the non-adjustable filter structure using these membranes, in order to prevent mechanical instability of the membrane, a porous body such as a porous membrane or a nonwoven fabric is used in close contact with the upper surface of the membrane. The structure other than the ventilation surface is sealed and fixed by press fitting and caulking.

For example, as shown in FIG. 12, when the filter 17 1 is installed upstream of the center hole 14 1 a of the valve body 14 1 in the valve mechanism, the end face of the valve body 14 1 The peripheral edge of the filter 17 1 cut to a predetermined size is pinched and clamped by the fastening member 1 4 5 having the through hole 1 4 5 a, and the outer peripheral cover 1 4 of the valve body 1 4 The lower end of 0 is caulked so as to fold back 140a, and the filter 1711 is attached.

As shown in Fig. 13a and Fig. 13b, the filter 171, as shown in Fig. 13a and Fig. 13b, tightly adheres the two members of the membrane film 171a and the porous body 171b made of non-woven fabric that protects it. A product obtained by laminating two layers with bonding points P arranged in a dotted pattern at predetermined intervals is commercially available and used. Then, as shown in FIG. 12, in a state where the filter 17 1 is assembled, a plurality of bonding points P (four in the case shown) are arranged with respect to the size of the ventilation passage, and the substantial ventilation is performed. The area is reduced by the area of the adhesive point P.

By the way, in the filter structure as described above, it is necessary to overlap a small membrane membrane with a diameter of about 3 to 4 mm with a porous body that protects it, and fix it tightly by press-fitting a fastening member, caulking the edge, etc. As a result, the yield during manufacturing is poor, and careful attention must be paid to tightening and squeezing, such as insufficient adhesion of the membrane film and film breakage due to over-adhesion. Changes subtly, and causes variation in flame length.

In addition, as described above, a commercially available film in which two layers of a membrane film and a nonwoven fabric are integrally laminated has an infinite number of bonding points P with the nonwoven fabric on the surface of the membrane film with a small diameter. Since this bonding point is made of resin by heat deposition, gas does not permeate. Depending on the number of the above-mentioned adhesion points in the membrane membrane installed in the gas path of the igniter, the gas permeation amount, that is, the gas ejection amount, changes, causing a variation in flame length, and is not a non-adjustable function. It is enough. In view of this point, an object of the present invention is to provide a filter structure of an igniter in which the gas permeation characteristics, that is, the flame length is stabilized and the filter can be favorably assembled.

Disclosure of the invention

In the filter structure of the igniter of the present invention, the fuel gas contained in the tank chamber is ejected from the ejection nozzle through a filter for quantifying the amount of permeated gas, a valve mechanism for opening and closing the gas supply, and combustion. In the igniter to be ignited, the filter is formed by superimposing a membrane membrane having micropores and quantifying the amount of a transmissive gas and a porous body having air permeability. A filter component having the filter fixed to a holder is assembled at a front position of the valve mechanism, the holder has a vent in the center, and the filter is welded to a peripheral portion of the vent. The porous membrane is non-adherent between the membrane membrane of the filter and the porous body in the vent of the hole.

The filter is characterized in that the porous body is located on the valve mechanism side. Further, it is preferable that the filter is welded to the holder in a sheet state, and then cut off from the sheet. The filter is fixed by heat welding, ultrasonic welding, insert molding, or the like. In addition, the above-mentioned fill has a multilayer structure in which there is no adhesion point between the membrane film and the porous body in the range of the ventilation inner diameter.

The porous body of the filter can be made of a synthetic resin nonwoven fabric. The non-woven fabric preferably has a fiber diameter of 30 to 15 ^ m and a basis weight of 40 to 15 g / m ² or less.The same polypropylene fiber as the membrane membrane, or a polyester fiber with low wettability and sparseness Those subjected to a butane property treatment are preferred.

The porous body of the filter can be made of a synthetic resin mesh material. As the mesh material, a fine wire having a wire diameter of 15 to 30 / m and a mesh interval of about 200 to 500 m is preferable.

The filter may be configured by laminating a porous body on both sides of the membrane film.

In the holder, the filter is welded to a peripheral portion of the vent at an end surface of the disc portion having the vent in the center, a part of the valve mechanism is inserted into the tubular portion, and O is provided at an end of the tubular portion. It is preferable to perform sealing with a ring and regulate the amount of gas permeation by the size of the vent.

The porous body of the filter is always in contact with a metal part for supplying heat to a part of the valve mechanism. At this time, the tension of the filter may be adjusted by adjusting the contact position of a part of the valve mechanism that is in contact with the porous body of the filter, and fine adjustment of the ventilation amount may be performed.

A ring-shaped elastic body may be arranged on the tank chamber side of the filter.

Further, an end of the valve mechanism is provided inside the holder to which the filter is fixed. It is preferable that the outer peripheral surface of the end portion of the valve mechanism and the inner peripheral surface of the holder be close to each other so as to reduce the volume between them, and that the insertion end surface of the valve mechanism comes into contact with the porous body of the filter. It is preferred that

The filter structure of the present invention can be applied to an ignition device such as an ignition rod, in addition to a gas line shown in an embodiment described later. This igniter is provided with a valve mechanism for opening and closing gas in the gas passage, in which liquefied gas contained in a tank chamber is ejected from an ejection nozzle through a gas passage and ignited and burned. This is a filter structure installed in the passage to keep the gas flow rate constant. In addition, the filter can be applied to a gas-phase type that has a structure that directly faces the tank chamber containing liquefied gas, regardless of the conventional suction core.

According to the present invention as described above, the filter for quantifying the amount of permeated gas is constituted by superimposing a membrane membrane having micropores and quantifying the amount of permeated gas, and a porous body having air permeability, A filter component in which the filter is fixed to the holder is assembled at a position preceding the valve mechanism. The holder is formed by welding the filter to a peripheral portion of a ventilation port, so that the filter and the holder are joined together. The welded part can be made of resin to create a completely airtight state, and the filter and holder can be easily assembled into a single part.In addition, the filter and holder are welded at a part other than the effective ventilation diameter to reduce the ventilation diameter. Since there is no bonding point, the ventilation volume is always stable according to the ventilation diameter, and the flame length can be stabilized.

In particular, the welding of the inexpensive resin holder and the filter makes it a filter component, improving difficult manufacturing aspects, making it easier to handle mechanical assemblies, etc., lowering costs and increasing product reliability. Has the effect of increasing.

Also, as mentioned above, the membrane and porous body of the holder and the filler are melted and resinized to have perfect sealing properties, so care must be taken when assembling the seal between the holder and the o-ring. Only airtightness can be maintained without the need for careful press fitting and caulking work.

The porous body of the filter and a part of the valve mechanism are always in contact with each other, and the membrane membrane is stretched through the porous body, whereby the state of the filter membrane is always stabilized without affecting the ventilation. In addition, a part of the valve mechanism that is in contact with the porous body is supplied with heat taken away during vaporization. Since it also has a role of supply, it can efficiently supply heat of vaporization to the filter in the above contact state.

In addition, if the tension of the filter can be adjusted, the amount of ventilation can be increased by increasing the amount of tension, and the flame length can be finely adjusted.

If a ring-shaped elastic body is installed on the tank chamber side of the filter, as long as it does not impede the ventilation diameter, the space under the filter can be minimized, and stable gas and gas combustion can be obtained. The load at the time of tightening can be buffered.

Also, when the outer peripheral surface of the end of the valve mechanism inserted into the holder 1 and the inner peripheral surface of the holder 1 come close to each other and the volume between them is made small, the amount of liquid gas accumulated in this part decreases, and the valve It is possible to suppress sudden flames that occur instantaneously at the time of opening.Furthermore, it is possible to suppress the temperature decrease due to vaporization in the filter by supplying heat from the valve mechanism, and to stabilize the flame by maintaining a constant amount of vaporization. it can.

BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a gas lighter having a filter structure according to one embodiment of the present invention.

-Central longitudinal section side view of the igniter,

Figure 2 is an enlarged sectional view of the valve mechanism,

Fig. 3 is an enlarged sectional view of the filter

Figure 4a is a cross-sectional view showing the stage before the filter

Fig. 4b is a cross-sectional view showing the creation of one filter component.

Figure 4c is a cross-sectional view of the filter component after fabrication and a bottom view of the filter, Figure 5a is a diagram showing the layer configuration of the filter,

Figure 5b shows the surface morphology of the filter.

FIG. 6 is an enlarged sectional view showing the tension adjustment of the filter in different states on the left and right, FIG. 7 is a sectional view of a main part showing a filter structure of another embodiment,

FIG. 8 is a cross-sectional view of a principal part showing another embodiment of the filter.

FIG. 9 is a cross-sectional view of a main part showing still another embodiment of the filter.

FIG. 10 is a cross-sectional view of a main part showing a filter structure of yet another embodiment. Figure 11 is a separation view of the valve body and filter parts of Figure 10,

Fig. 12 is a cross-sectional view of a main part showing a conventional filter structure and a bottom view of the filter, and Fig. 13a is a diagram showing a layer configuration of the conventional filter.

FIG. 13b is a diagram showing the surface morphology of a conventional filter.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of a filter structure of an igniter according to the present invention will be described in detail with reference to the drawings.

Fig. 1 is a central longitudinal sectional side view of an ignition device using a gas lighter having a filter structure according to one embodiment, Fig. 2 is an enlarged sectional view of a valve mechanism part, and Fig. 3 is an enlarged sectional view of a filter structure part. is there.

The gas lighter 1 (igniter) of the present embodiment includes a lighter body 2 in which fuel gas is stored, an ejection nozzle 3 for ejecting gas from a tip ejection port 31, and a movement of the ejection nozzle 3. A valve mechanism 4 that opens and closes the gas passage from the lighter body 2, a gas lever 5 that pulls up the ejection nozzle 3 to open the valve mechanism 4 during the ignition operation, and a discharge type that ignites the ejection gas in response to the ignition operation An ignition mechanism 6, a filter component 7 installed at the lower part of the valve mechanism 4 at an opening to the tank chamber 24 to adjust the gas amount, a cap 8 attached around the upper part of the jet nozzle 3, and a gas An operation button 9 for squirting and igniting is provided.

The lighter body 2 has an upper lid 22 airtightly fixed to an upper part of a bottomed cylindrical tank body 2 1 (a lower part is not shown) molded of synthetic resin, and stores a fuel gas such as butane gas therein. A tank chamber 24 is formed, and an upper case 22 is provided with an intermediate case 23.

A well-known valve mechanism 4 that penetrates the upper lid 22 of the lighter body 2 vertically and that opens and closes gas supply to the ejection nozzle 3 is provided. At the center of the longitudinal axis of the valve mechanism 4, a thin pipe-shaped ejection nozzle 3 is provided so as to be movable in the axial direction, and the tip of the ejection nozzle 3 protrudes from the upper end of the valve mechanism 4. The jet nozzle 3 has a tapered tip at the vicinity of the jet port 31 and a stepped neck portion 32 at the lower portion thereof. A nozzle engagement portion 51 formed at one end of the gas lever 5 is engaged with the upper end of the neck 32. In addition, a nozzle tip 34 is attached to the tip ejection port 31 of the ejection nozzle 3, and a part of the gas ejected from the ejection port 31 is diffused to the outer periphery in order to enhance the ignitability by the discharge ignition described later. In this way, the mixing property of air is increased.

The valve mechanism 4 opens a gas passage with the upward movement of the ejection nozzle 3 and ejects gas.The valve mechanism 4 is provided in the mounting hole 22 b formed through the upper lid 22 and the filter component 7. The main body 4 1 (valve bottom) is inserted, and a fixing member 4 2 (nozzle screw) is screwed so as to press the valve main body 4 1, and the ejection nozzle is inserted into the valve main body 4 1 and the fixing member 42. 3 is slidably disposed in the axial direction. A valve body 44 is fitted to the lower end of the ejection nozzle 3 to close the internal passage, while the opening 33 on the intermediate side communicates the internal passage with the outer periphery. A center hole 41a is opened at the bottom of the valve body 41 to form a valve seat. The valve body 44 is seated and opens and closes the center hole 41a to open and close gas supply. The jet nozzle 3 is urged in a downward seating direction by a nozzle spring 45 compressed between the jet nozzle 3 and the inner surface of the upper end of the fixing member 42.

Further, a central portion of the lower end portion 41b of the valve body 41, that is, a periphery of the center hole 41a projects downward, and a holder 172 of the filler component 7 is fitted around the central portion. ing. Below the center hole 41a of the valve body 41, there is a filter 71 fixed to the holder 72, and through the filter 21 and the through hole 22a of the upper lid 22. This is a gas-phase system that communicates with the inside of the tank chamber 24 and does not have a wick made of a porous material. Details of the filter part 7 will be described later.

On the outer periphery of the valve body 41, a ring 47 for performing gas sealing between the inner peripheral surface of the mounting hole 22b of the upper lid 22 is mounted, and on the outer periphery of the ejection nozzle 3, a fixing member 42 is provided. An O-ring 48 for performing gas sealing with the inner peripheral surface is interposed, and one end of the nozzle panel 45 contacts the O-ring 48.

In addition, the L-shaped gas lever 15 in which the nozzle engaging portion 51 at one end is engaged with the ejection nozzle 3 has a bent shaft 52 supported by the intermediate case 23 of the lighter body 2 so as to be swingable. The linking portion 53 at the other end extends diagonally downward and is linked to a lever push 63 described later.

On the other hand, above the lighter body 2 (intermediate case 2 3) on the opposite side of the ejection nozzle 3 The operation button 9 disposed at the bottom has a cylindrical bottom fitted to the upper end of the piezoelectric unit 61 of the ignition mechanism 6 and can be pushed down.

The ignition mechanism 6 includes a piezoelectric unit 61 whose lower part is held by the intermediate case 23 and whose upper part is movable up and down. The discharge electrode 62 connected to the upper end of the piezoelectric unit 61 is operated by an operation button. The high voltage generated by the operation of the piezoelectric unit 61 is applied between the discharge electrode 62 and the ejection nozzle 3 (nozzle tip 34), and is used for ignition. Discharge is performed.

Further, the upper half of the piezoelectric unit 61 moves downward with the pressing operation of the operation button 9, but the moving part of the piezoelectric unit 61 comes into contact with the linking portion 53 of the gas lever 5 to contact the moving portion of the piezoelectric unit 61. A lever push 63 for rotating the gas lever 5 is provided. With this operation, the lever press 63 rotates the gas lever 5 in accordance with the pressing operation of the operation button 9 so that the fuel gas is ejected from the ejection nozzle 3. The piezoelectric unit 61 is operated to perform discharge ignition.

Next, the filter component 7 will be described with reference to FIGS. 4A to 4C and FIGS. 5A and 5B. The filter 7 is composed of a filter 7 1 and a holder 7 2 fixedly holding the filter 7 1. As shown in FIG.5a, the filter 71 is composed of a membrane membrane 71a having fine pores for quantifying the amount of permeated gas and a porous body 71b having air permeability. Before being welded to the holder 72, the membrane film 71a and the porous body 7lb are non-adhered.

The membrane film 71a is composed of a stretched polypropylene resin film or the like having micropores with a pore radius of 200 to 500 nm, and has a constant flow rate almost independent of the gas volume and temperature of the tank chamber 24. Has the property of transmitting gas. In this way, the flow rate of the passing gas is adjusted, and the amount of the ejected gas, that is, the length of the flame is made constant without adjustment.

In this embodiment, the porous body 7 lb is a nonwoven fabric made of a synthetic resin, and the fibers used are preferably a fiber diameter of 30 to 15 ^ 111 and a basis weight of 40 to 15 g Zm ² or less, Polypropylene fiber of the same material as that of the membrane film 71a, or a polyester fiber with low wettability and a treatment with a low-phobic property is used.

As the material of the porous body 71b (nonwoven fabric), the same polypropylene resin as that of the membrane film 71a is preferable because of its excellent weldability, but the wettability is lower than that of the membrane film 71a. Polyester fibers are even better. In other words, as a feature of the igniter such as the gas-phase controlled gas lighter 11, when the igniter is used sideways, the liquid gas comes in contact with the membrane immediately below the membrane 71 a. The flame length when liquefied gas comes into contact tends to be longer than that when gas is used. In response to this phenomenon, the material of the porous body 71b (non-woven fabric), which is in contact with and directly over the membrane membrane 71a, is made of polyester fiber with less wettability than polypropylene fiber, so that the normal state (upright state) can be obtained. From the test results, it was found that the flame length fluctuation was reduced when the gas-phase combustion state was changed from the gas-phase combustion state in use to the liquid-gas combustion in the horizontal direction. By contacting the fiber with low wettability directly on the membrane, gas gas is not affected and control of liquid gas alone is possible.

The holder 72 includes a disk portion 72a having a vent hole 72c at the center thereof, and a cylindrical portion 72b connected to the outer periphery of the disk portion 72a. The filter 71 is welded to the peripheral portion of the ventilation port 72c at the end face 72d of a. As for the material of the holder 72, a polypropylene resin of the same material as the membrane film 71a is most stably welded.

The creation of the filter component 7 is performed as shown in FIGS. 4A to 4C. First, as shown in FIG. 4a, a sheet-like porous body 7 lb (nonwoven fabric) and a membrane film 71a are sequentially stacked on the end face 72d of the disc portion 72a of the holder 72, and as shown in FIG. As shown in the figure, a sealer 75 heated to a predetermined temperature is pressed against the end face 72 of the disc portion 72a at the peripheral portion of the ventilation opening 72c so that the filter 71 is welded. . Then, as shown in FIG. 4C, the filter member 71 is cut off at the outer peripheral portion of the holder member 72 to form the filter member 7.

As described above, the membrane film 71a of the filter 71 and the porous body 71b in the vent hole 72c of the holder 172 are not adhered. That is, the filter 71 has a multilayer structure in which there is no adhesive point between the membrane film 71a and the porous body 71b in the range of the ventilation inner diameter. Also, the membrane film 71a and the porous body 71b are welded to the resin holder 72 in a sheet state and then punched out of the sheet so that the overlapping state of the two films is always stable. In addition, by welding the filter 71 to the cylindrical resin holder 72 at a portion other than the effective ventilation diameter, the welded portion is made resin, and a perfect airtight state is created between the filter 71 and the holder 72. direction To block the flow of gas to the

The fixing of the filter 71 may be performed by heat welding or ultrasonic welding, or by insert molding in which the filter 71 is set in a mold when the holder 72 is molded. In the case of welding, experiments made it possible to perform welding while ensuring a stable ventilation diameter by adjusting the temperature conditions, time, dimensions and clearance of the sealer 75 and the resin holder 72.

As shown in FIGS. 2 and 3, the filter component 7 is assembled at a position before the valve mechanism 4. The attachment of the filter component 7 is performed by first inserting the filter component 7 into the mounting hole 22 b of the upper cover 22 and then assembling the valve mechanism 4. A part of the valve mechanism 4, that is, the lower end 41 b of the valve body 41 is inserted into the cylinder 7 2 b of the holder 7 2, and the ring is pressed against the upper end of the cylinder 7 2 b and the holder 7 is pressed. The seal between the inside and the outside of 2 is performed, and the amount of gas permeation is defined by the size of the vent 72 c (the permeation area of the membrane 71 a).

The filter component 7 is a rubber O fixed to the bottom surface 2 2 c of the concave mounting hole 2 b of the upper lid 2 2 sealing the liquid gas in the tank chamber 24 and the outer peripheral surface of the valve body 4 1. It is positioned so as to be sandwiched between the rings 47, and the upper end surface of the resin holder 72 and the O-ring 47 keep the airtightness around the filter 71. The O-ring 47 also serves as a seal between the circumferential surface of the mounting hole 22 b and the outside 41 of the valve. As described above, the resin holder 72, the membrane film 71a, and the porous body 71b (non-woven fabric) are melted and have a perfect sealing property. Only the seal of the holder 1 72 and the O-ring 4 7 is required, so that airtightness can be reliably maintained without the need for careful press fitting and caulking work.

In the filter 71, the porous body 7 1b is located on the valve mechanism 4 side, the lower end 4 1b of the valve body 4 1 always contacts the porous body 7 1b, and the holder 7 2 The valve 71 surrounds the valve body 41, which is a metal part that supplies heat to the vicinity of the filter 71.

The bottom end face of the lower end 4 1b of the valve body 4 1 is always in contact with the porous body 7 1b of the filter 71, and the membrane film 7 1a is stretched through the porous body 7 1b. As a result, the state of the membrane 71 a is always maintained without affecting the ventilation. To be stable. In addition, since the valve body 41 made of metal (for example, made of brass) also serves to supply heat taken away during vaporization, the valve body 41 is kept in contact with the porous body 71b so that the heat of vaporization to the filter 71 is kept constant. Can be supplied efficiently.

Fig. 6 is a cross-sectional view showing the adjustment of the tension (pressed state) of the membrane membrane 71a of the filter 71 by adjusting the height of the valve body 41 using the fixing member 42 (nozzle screw) of the valve mechanism 4. It is. The left part of Fig. Β shows a state in which the amount of tension of the filter 71 is small. From this state, as shown in the right part of Fig. 6, by increasing the amount of tension of the filter 71, the membrane film 71 a From the test results, it was found that the amount of ventilation increased slightly. Although this is not enough to adjust the flame length in a wide range, it is possible to fine-tune the flame length of about 1 to 5 thighs, and it is possible to fine-tune the flame length as needed in the manufacturing process. The operation of the gas writer 11 having the above configuration will be described. In the non-use state shown in FIG. 1, the ejection nozzle 3 is moved downward by the nozzle spring 45, the valve element 44 is seated, the center hole 41a is closed, and the gas supply is closed. Accordingly, the gas lever 5 is in a state in which the nozzle engaging portion 51 swings downward. The ignition operation is to push down the operation button 9 with a finger, and the piezoelectric unit 61 is pushed down and the lever push 6 3 swings the gasket lever 5 so that the ejection nozzle 3 is pulled up and the valve body 4 4 Open the central hole 4 1a. A certain amount of fuel gas that has passed through the filter 71 from the tank chamber 24 flows into the internal passage from the outer periphery of the jet nozzle 3 through the opening 33, and is jetted from the tip jet port 31. The discharge is performed by the unit 61 to ignite the ejected gas, and a combustion flame of a predetermined length is generated.

When the operation is completed and the finger is released from the operation button 9, the ejection nozzle 3 moves in the downward direction by the nozzle spring 45 of the valve mechanism 4, shuts off the gas ejection and extinguishes the fire, and the gas lever 15 also returns and swings. On the other hand, the operation button 9 moves upward by the spring incorporated in the piezoelectric unit 61 and returns to the initial position.

According to the present embodiment, since the welding of the filler 1 7 to the holder 1 7 2 is performed on the outer periphery other than the ventilation diameter, there is no adhesion point in the ventilation diameter, and the ventilation amount is always according to the ventilation diameter. stable. In addition, welding with an inexpensive resin holder 17 2 makes the filter a part 7, making it easier to handle the machine assembly and the like, leading to cost reduction. Fig. 7 shows another embodiment of the fill filter structure. A flat ring-shaped elastic body 7 3 within a range that does not impede the ventilation diameter is provided at the lower part of the fill filter component 7 on the tank chamber 24 side. It is installed between the disk portion 72a and the bottom surface 22c, and the other configuration is the same as in FIG.

In this embodiment, the interposition of the elastic body 73 minimizes the liquid pool space below the filter 71 as much as possible to achieve stable gas-gas combustion, and the upper lid 2 when the fixing member 4 2 is tightened. 2 can buffer the load.

FIG. 8 is a sectional view showing another embodiment of the filter 71. In the filter 71 of this embodiment, the porous body 71 c laminated on the membrane film 71 a is made of a synthetic resin fine wire diameter mesh material instead of a nonwoven fabric. Porous material 7 1c made of mesh material has a more stable porosity than non-woven fabric, and is used when shifting from gas-gas combustion to liquid gas combustion that occurs when an ignition device such as gas lighter 1 is used at an angle. However, the control of the flame length change is performed more quantitatively. The wire diameter of the mesh material was 15 to 30 / x m, and the mesh material interval was about 200 to 500 im.

The porous body 71 c made of the mesh material is also laminated on the membrane film 71 a and welded to the periphery of the vent 72 c of the holder 72 in the same manner as described above. ,

FIG. 9 is a cross-sectional view showing still another embodiment of the filter 71. The filter 71 of this embodiment has a three-layer structure in which porous bodies 7 lb and 71 b made of a nonwoven fabric are stacked on the upper and lower surfaces of a membrane membrane 71 a. By welding the three-layer filter 71 to the holder 72, the mechanical strength of the membrane film 71a can be improved.

In other words, the membrane membrane 71a used for the igniter such as the Gas-Ray 1 is a thin film having a pore diameter of 0.05 rn and a thickness of about 0.02, and is manufactured by uniaxial stretching of a polypropylene film. Therefore, it has the property of orientation and is easily torn in directions other than a certain direction. This often resulted in the film breaking during drop impact and assembly. In this regard, as described above, by stacking porous bodies 7 1b and 7 lb above and below the membrane membrane 7 1a and welding them to the holder 72, the mechanical strength is improved and the filter does not affect ventilation. 7 could be 1.

10 and 11 are cross-sectional views showing still another embodiment of the filter structure. You. The filter component 7 of this embodiment is formed substantially the same as that shown in FIG. 3 together with the filter 71 and the holder 72. The connecting portion between the disk portion 72a and the cylindrical portion 72b on the inner surface side of the holder 72 is formed on a slope.

In the present embodiment, the inner peripheral surface of the holder 72 of the filter component 7 and the outer peripheral surface of the lower end 41 b of the valve body 41 of the valve mechanism are formed close to each other, and the volume between them is reduced. It is getting smaller. In other words, as shown in Fig. 11, the inner diameter d1 of the ventilation port 7 2c of the holder 7 2 and the outer diameter D 1 of the lower end 4 lb of the valve body 41 inserted into the ventilation port 7 2c. Are formed to dimensions (dl≤D 1) that fit with a specified fit tolerance, and the inner and outer peripheral surfaces of both come close to or come into contact with each other during assembly.

3 □

A predetermined fit between the inner diameter d2 of the cylinder part 72b of the cylinder 72 and the outer diameter D2 of the shoulder part 41c of the valve body 41 inserted into the cylinder part 72b. It is formed with dimensions (d 2 ≤ D 2) that fit with tolerances, so that the inner and outer peripheral surfaces of both will approach or come into contact during assembly. Further, when assembling the filter component 7 and the valve body 41, the lower surface and the chamfered surface of the step portion 41c of the valve body 41 may approach or be closer to the upper surface and the slope of the disk portion 72a of the holder 72. The valve body 41 is inserted so as to make contact. In addition, the end face of the lower end 41 b of the valve body 41 is entirely in contact with the porous body 71 b of the filter 71. When the material of the holder 72 is a resin having elasticity, a fitting structure having a large dimension on the valve body 41 side may be adopted.

According to the present embodiment, the inner surface of the holder 72 and the outer surface of the valve body 41 in the assembled state are close to each other so that the gap is small and the volume between them is small. As a result, the amount of liquid gas pool on the valve mechanism 4 side of the filter 1 1 is minimized, and sudden gas that is instantaneously generated when the gas stored here is supplied at a stretch when the valve is opened is suppressed. be able to. '

In addition, the above structure allows the valve body 41 made of metal with high thermal conductivity (such as brass) to supply heat well to the holder 72 and the filter 71 1, and the filter 71 generated during vaporization. This has the effect of suppressing the cooling of the gas, maintaining a constant amount of vaporization, and stabilizing the flame length.

Claims

The scope of the claims

(1) An igniter that burns fuel gas stored in the tank chamber through a filter that quantifies the amount of permeated gas, a valve mechanism that opens and closes gas supply, and a gas jet from a jet nozzle.

The filter component is configured by laminating a membrane membrane having micropores and quantifying the amount of permeated gas and a porous body having gas permeability, and a filter component having the filter fixed to a holder is provided by the valve mechanism. The holder has a vent in the center, the filter is welded to the periphery of the vent, and the membrane and porous body of the filter in the vent of the holder Is a non-adhesive filter structure for an igniter.

(2) The filter structure for an igniter according to claim 1, wherein the filter has a porous body located on a valve mechanism side.

(3) The filter structure for an igniter according to claim 1 or 2, wherein the porous body of the filter is a nonwoven fabric made of a synthetic resin.

(4) The filter structure for an igniter according to claim 1 or 2, wherein the porous body of the filter is a synthetic resin mesh material.

(5) The filter structure for an igniter according to claim 1 or 2, wherein the filter is formed by laminating a porous body on both sides of a membrane film.

(6) The holder includes a disk portion and a cylinder portion having the ventilation hole at the center, and the filter is welded to a peripheral portion of the ventilation hole at an end surface of the disk portion, and the valve mechanism is provided in the cylinder portion. The ignition device according to claim 1 or 2, wherein a part of the ignition device is sealed, and a seal with an O-ring is performed at an end of the cylindrical portion, and a gas permeation amount is regulated by a size of a vent. Filter structure.

(7) The filler structure of the igniter according to claim 1 or 2, wherein the porous material of the filler is always in contact with a part of the valve mechanism.

(8) The tension of the filter is adjusted by adjusting the contact position of a part of the valve mechanism that is in contact with the porous body of the filter, and fine adjustment of the air flow rate is performed. 8. The fill structure of the igniter according to claim 7. (9) The filter structure for an igniter according to claim 1, wherein an elastic body is arranged on the tank room side of the filter.

(10) An end of the valve mechanism is inserted into the holder to which the filter is fixed, and an outer peripheral surface of the end of the valve mechanism and an inner peripheral surface of the holder are close to each other, and a volume between the two is provided. 2. The fill structure of the igniter according to claim 1, wherein the size is formed small.