JPH04108154U - igniter - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a simple and highly reliable structure for reducing the cross-sectional area of the gas passage relative to the ejection nozzle when the ejection nozzle for gas ejection in an ignition device is used as one of the discharge electrodes. form. [Configuration] Gas tank 7, valve mechanism 8, and piezoelectric unit
20, and a gas pipe 28 for guiding gas to the ejection nozzle 26, and igniting the ejected gas by electric discharge between the ejection nozzle and a discharge electrode 32 disposed near the ejection nozzle.
A covered conducting wire 33 for supplying electricity to the jet nozzle is inserted into the gas pipe, and the cross-sectional area of the gas passage between the covered conducting wire and the gas pipe is set small.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention emits a flame that is ignited by discharge of gas from the built-in gas tank. This relates to the structure of the ignition device.

0002

[Conventional technology]

Conventionally, ignition devices such as ignition sticks and tabletop gas lighters have been used to Flame is ejected from the tip of a rod that protrudes from a valve mechanism that opens and closes the ejection. However, there is a gas pipe that supplies gas to the jet nozzle at the tip, and a power supply for discharging. A wire extends from the main body and is connected to the nozzle and discharge electrode at the tip. Ru.

0003

[Problem that the idea aims to solve]

Therefore, it is equipped with a connection structure for gas pipes and electric wires as described above, and extends into a rod shape. In igniters that have a part that has a part that has has.

0004 In other words, even if gas supply is started in response to operation of the valve mechanism in the main body, There is a time delay before the gas actually blows out from the jet nozzle at the tip, so If the distance to the tip is long, the delay time will also be large. Therefore, ignition There is a certain delay in gas supply due to the activation of the valve mechanism in response to lever operation. However, there are individual differences in the operating speed of the ignition lever. Therefore, discharge occurs before gas is ejected, or discharge occurs after ejecting a large amount of gas. Therefore, it is difficult to always ensure a good ignition condition.

[0005] Additionally, the gas delay mentioned above is due to the cross-sectional area of the gas passage leading to the jet nozzle at the tip. In other words, if the passage volume is large, the delay will also be large, so by reducing the cross-sectional area of this gas passage. Increasing the gas flow rate is effective in reducing the delay, but narrow gas passages are This is disadvantageous in terms of ensuring reliable formation and connection.

[0006] On the other hand, in discharge ignition using a piezoelectric unit, the discharge voltage is guided to the jet nozzle. There is stray capacitance between the wire and the ground side, which occurs in the piezoelectric unit. The high voltage becomes an alternating current voltage, and leakage occurs to the ground side through the above stray capacitance. It has the problem of decreasing flammability.

[0007] Therefore, in view of the above circumstances, the present invention has developed a gas passage for the jet nozzle at the tip. Improves ignitability by forming a structure with a small cross-sectional area easily and with high reliability. The object of the present invention is to provide an ignition device that does the following.

[0008]

[Means to solve the problem]

In order to achieve the above purpose, the igniter of this invention consists of a gas tank, a valve mechanism, and a piezoelectric The unit is equipped with a gas pipe that guides gas to the jet nozzle, and the jet The process of igniting the ejected gas by the discharge between the nozzle and the discharge electrode placed near it. Then, insert a covered conductor for energizing the jet nozzle inside the gas pipe. , the cross-sectional area of the gas passage between the covered conductor and the gas pipe is set small. be.

[0009] In addition, the core wire of the covered conductor is placed in the center of the gas pipe to minimize stray capacitance. It is preferable that

0010

[Action and effect]

In the above-mentioned ignition device, the inside of the gas pipe that leads the gas to the jet nozzle at the tip. By inserting a covered conductor to energize the jet nozzle, the covered conductor and the gas By reducing the cross-sectional area of the gas passage between the gas pipes, the gas flow velocity through the gas pipes can be reduced. It is good because the gas is ejected quickly and stably in response to the operation of the ignition lever. It is possible to obtain good ignitability. In addition, the gas pipe passage itself must be made small. Gas passages can be formed and connected reliably and with high reliability. Moreover, it can be implemented with a simple structure that requires only the insertion of a covered conductor.

[0011] On the other hand, arrange the covered conductor so that its core wire is located at the center of the gas pipe. This increases the distance to the ground side and minimizes stray capacitance for piezoelectric ignition. The amount of leakage to the ground side is reduced, and a good ignition rate can be obtained.

0012

【Example】

Embodiments of the present invention will be described below with reference to the drawings. Figure 1 shows an example of an ignition system. 2 is a cross-sectional plan view of the ignition rod, and FIG. 3 is an enlarged cross-section of the main parts. FIG.

[0013] The ignition device 1 (ignition rod) includes a main body 2 and an extension 3 extending from the main body 2 in a rod shape. It is made up of. In particular, in this embodiment, the main body part 2 and the extension part 3 are separate bodies. This is an example in which they are formed into a unit structure and are integrated by engagement between the two.

[0014] The case part of the main body part 2 is composed of a tank cover 5 and an intermediate case 6 in front of the tank cover 5. It is formed. The tank cover 5 is formed into a cylindrical shape with an open front, and has an intermediate cover. The base 6 is divided into left and right parts, has a window 6a for the ignition lever at the bottom, and a window 6a at the tip. An opening 6b for inserting the extension part is formed.

[0015] A gas tank 7 containing high pressure gas is installed inside the tank cover 5. has been done. This gas tank 7 is formed by combining a tank body 7a with a tank top lid 7b. The tank top cover 7b has a valve mechanism that opens and closes the gas supply from the gas tank 7. Structure 8 is installed. That is, the wick 9 is inserted into the gas tank 7, and the wick 9 is inserted into the gas tank 7. Gas is supplied through the core 9, and a nozzle member 10 is interposed in the gas passage. . This forward movement of the nozzle member 10 opens the passage and supplies gas, causing the spray The backward movement of the ring closes the passage and stops the gas supply. Please note that the gas supply The amount of flame supplied, that is, the size of the flame, is determined by a flame adjustment unit that is connected to the adjustment sleeve 12 and protrudes to the outside. Adjustment is made by turning knob 13.

[0016] The tip of the nozzle member 10 of the valve mechanism 8 is provided with an opening button for opening the nozzle member 10. One end of the rotating lever 14 is engaged, and the nozzle in front of the rotating lever 14 is engaged. A shield packing 15 made of an elastic material is attached to the most distal end of the member 10. Up The other end of the rotary lever 14 is linked to a piezoelectric unit 20, which will be described later.

[0017] In addition, an ignition lever is provided inside the window 6a of the intermediate case 6 and can be slid back and forth. 18 is arranged, and a piezoelectric unit is provided between the rear part of the ignition lever 18 and the tank top lid 7b. 20 have been installed. This piezoelectric unit 20 supplies a discharge voltage, As the ignition lever 18 moves backward, the slide portion 20a moves backward, and in response to the backward movement, the slide portion 20a moves backward. The piezoelectric unit 20b engages with and rotates the rotation lever 14, and also rotates the piezoelectric unit 20. Supplies internally generated discharge voltage.

[0018] That is, the rotary lever 14 is formed in a substantially L shape, and has a fulcrum 14a in the middle part. It is supported to rotate around the piezoelectric unit 20, and is rotated by the retreat of the projection 20b of the piezoelectric unit 20 When the other end of the rotating lever 14 rotates upward, it engages with the nozzle member 10 of the valve mechanism 8. The other end of the rotating lever 14 is moved so as to pull out the nozzle member 10 forward. The valve mechanism 8 is operated to open the valve mechanism 8 to supply gas. In addition, the above protrusion 20b 20b also serves as one electrode terminal for the discharge voltage, and a conductive resin formed from this protrusion 20b Electricity is supplied to the nozzle member 10 via the rotation lever 14.

[0019] On the other hand, the other electrode of the discharge voltage is connected from the tip of the slide portion 20a of the piezoelectric unit 20. The base plate 21 connects the pipe holder 17, which will be described later, with a connection placed on the side of the middle part. Connected to feeler 21a. In other words, the ground plate 21 has a piezoelectric unit at its base. It is held between the ignition lever 18 and the ignition lever 18, and is bent forward at the top of the ignition lever 18. Furthermore, the pipe holder 17 is bent sideways and forward near the flange 17d. A contact 21a that presses toward the center is formed on the side of the center line of the pipe holder 17. ing. Then, this earth plate 21 is integrated as the ignition lever 18 slides. move in a specific manner.

[0020] Next, the extension part 3 is provided with an ejector that ejects gas into the tip of the rod-shaped metal cylinder 25. A nozzle 26 is provided. The jet nozzle 26 has a nozzle tip 27 at its tip, The rear end is fitted to the tip of the gas pipe 28, and the outer circumference is made of plastic. A nozzle cover 30 made of an insulating material such as a cover is provided. This nozzle cover 30 , a cap-shaped cap fitted to the outer periphery of the tip side of the gas pipe 28 from the above-mentioned jet nozzle 26 It has a holder part 29. The rear end 29a of this holder part 29 has a rectangular flange on the outside. It is formed so as to protrude to the side, and its four corners are in contact with the inner surface of the metal cylindrical body 25, and are arranged concentrically. It will be done.

[0021] Further, the nozzle cover 30 is integrally connected to the front of the holder part 29 at the upper part. It has an extended cover part 31. A holder which is the rear end part of this cover part 31 The lower part of the part connected to the part 29 is cut out, and the front end part of the jet nozzle 26 is cut out. is exposed. In addition, the tip of the cover part 31 is similar to the tip of the nozzle tip 27. A front wall 31a is formed at the front position. The upper part of this front wall 31a is a nozzle An open part 31b is formed by cutting upward from the front of the cup 27 in a V-shape. , the opening 31b is provided with a nozzle to ensure ignition, as shown in FIGS. 2 and 3. The discharge electrode side is opened inwardly of the cover part 31 to the extent that the lead chip 27 is exposed. section is defined.

[0022] Further, a slit is formed in the front wall 31a downward from the lower point of the V-shape of the opening portion 31b. has been done. Therefore, the front wall 31a has opposing sector shapes when viewed from the front. Further, on both sides of the outer surface of the cover portion 31, there are provided a portion of the bent piece 25d of the metal cylinder body 25 that engages with the tip of the bent piece 25d. An engagement groove 31c is formed.

[0023] On the other hand, at the tip of the metal cylindrical body 25, a crater 25a through which the flame passes is opened at the center of the end face. A plurality of air inlets 25b are opened on the side of the rear part, and a cylinder is opened above the rear part. A discharge electrode 32 is provided in which a portion of the discharge electrode 32 is bent toward the center. Also, this discharge The air inlet 25b is also opened at the area where the electrode 32 is formed, and after it is a little further away from the front end. Air inlet ports 25c at four surrounding locations extend in the axial direction at positions corresponding to the cover portion 29 on the side portion. It is formed by extending.

[0024] The nozzle cover 30 inserted inside the tip of the metal cylindrical body 25 as described above is The discharge electrode 32 is located facing the upper part of the V-shaped opening 31a. Also, the gold The air introduced from the air inlet 25c opened in the metal cylinder 25 flows into the air around the outer periphery of the holder part 29. It flows into the inner space of the cover part 31 from between.

[0025] A gas pipe 28 is inserted into the inner hole of the holder part 29 of the nozzle cover 30 from the rear. is for guiding gas to the jet nozzle 26, and is made of a hard material. , this gas pipe 28 passes backward through the center of the metal cylinder 25, and its rear end is The length is formed to protrude from the rear end of the metal cylinder body 25. This metal cylinder 25 and A pipe holder 17 is fitted into the rear end of the gas pipe 28.

[0026] A covered conductor wire 33 is inserted into the gas pipe 28, and the coated conductor wire 33 is inserted into the gas pipe 28. Both end portions of the sheathing 33a are removed to expose the center conductor, and the middle portion of the sheathing 33a is removed. The outer diameter has a predetermined minute gap with respect to the inner diameter of the gas pipe 28, and the gas passage between the two is cut off. I'm trying to keep the area small. Further, the outer peripheral portion of the sheath 33a of the sheathed conductor 33 As shown in FIG. 4, a concave gas conduction groove 33b extending in the axial direction is formed. There is.

[0027] A terminal member 34 is attached to the rear end portion of the gas pipe 28. This terminal member 34 It is formed into a hollow sleeve shape, and one end connects the gas pipe 28 from the pipe holder 17. The other end is formed into a flange shape with a large outer diameter, and the pipe holder is inserted into the pipe holder. -17 is engaged with the end hole. Then, the covered conductor 33 is connected to the jet nozzle at the tip. 26 and the terminal member 34 at the other end are electrically connected.

[0028] Furthermore, the pipe holder 17 attached to the rear end of the gas pipe 28 has a substantially cylindrical shape. The central insertion hole 17a into which the gas pipe 28 is inserted from the front has an opening with a diameter of The guide surface is large and tapers smoothly in the middle, and the circumferential groove 17 on the outer periphery of the rear end b is provided so as to be engageable with the engaging portion 6c of the intermediate case 6. And that The terminal member 34 is fitted from the rear end, and the valve machine is attached to the back of the terminal member 34. The shield packing 15 attached to the tip of the nozzle member 10 of the structure 8 can come into contact with it. Ru. On the other hand, the front end of the pipe holder 17 is inserted into the rear end of the metal cylinder 25. The rear end of the metal cylindrical body 25 comes into contact with the intermediate flange 17d of the pipe holder 17 and is locked. Ru.

[0029] To assemble the extension part 3 to the main body part 2 as described above, attach the base of the rod-shaped extension part 3 to the main body part 2. , by inserting it through the opening 6b of the main body part 2 and attaching it, the two are engaged and integrated. be. That is, the pipe hoop assembled in advance with the gas pipe 28 and the metal cylindrical body 25 Set the router 17 in the divided intermediate case 6 of the main body 2, and The intermediate case 6 is positioned by engaging the circumferential groove 17b of the holder 17, and the intermediate case 6 is inserted from both sides. Close and integrate.

When integrated through this assembly, the terminal member 34 and the nozzle member 10 are connected, and the gas passage inside the gas pipe 28 and the gas passage of the valve mechanism 8 are communicated. In addition, the metal cylinder body 2
The contact 21a of the earth plate 21 comes into contact with the circumferential surface of the earth plate 21, and one pole is electrically connected to the discharge electrode 32, and high voltage can be passed from the nozzle member 10 to the terminal member 34, and the other pole is connected to the nozzle tip 27. Through this, both poles of the piezoelectric unit 20 are electrically connected.

[0031] Next, to explain the ignition operation, when you push the ignition lever 18, , as the projection 20b of the piezoelectric unit 20 moves, the nozzle member 10 of the valve mechanism 8 is pulled. The valve mechanism 8 is opened to supply gas. Feed from nozzle member 10 The supplied gas flows through the narrow gas passage between the outer periphery of the covered conductor 33 of the gas pipe 28. and the nozzle of the jet nozzle 26 at the tip of the extension part 3 through the gas conduction groove 33b of the covering 33a. Squirt from chip 27. Note that the groove 33b of the covered conductor 33 allows the gas pipe 28 to The conductor 33 moves within the sheath 33a and the end face closes the opening of the jet nozzle 26 or the terminal member 34. Even in the event of a break, the gas passage is secured.

[0032] At that time, a small passage cross-sectional area between the outer periphery of the covered conductor 33 in the gas pipe 28 is Due to the high gas flow rate through the sections and the small passage volume between them, The time from the opening operation of the valve mechanism 8 to the gas ejection from the ejection nozzle 26 becomes shorter. It is shortening the time.

[0033] In addition, when the ignition lever 18 is operated, a discharge voltage (AC voltage) is generated from the piezoelectric unit 20. is generated, and this discharge voltage is passed through the metal cylinder 25 and the conductor 33 in the gas pipe 28, respectively. The voltage is applied between the discharge electrode 32 of the extension part 3 and the nozzle tip 27, and ignites the ejected gas. will be held.

[0034] In this case, in addition to improving ignitability due to stable gas supply due to the shortening of the arrival time, In addition, part of the ejected gas accumulates inside the cover part 31 of the nozzle cover 30, and the air guide at the back. When mixed with the air introduced from the inlet 25c, the ignitability of the discharge sparks is improved. Also , the conductive wire 33 is inserted into the gas pipe 28, and its core wire is connected to a metal cylinder that serves as the ground. 25, the distance between the ground is long and it is easy to discharge high AC voltage. Stray capacitance is minimized, the amount of leakage is reduced, the discharge energy is high, and the ignition rate is improved. go up

[0035] Furthermore, the tip of the nozzle tip 27 is located inside the cover part 31 of the nozzle cover 30, It is covered with the nozzle cover 30 and the metal cylinder 25, and is protected from the direct action of wind, oil, fireworks, etc. The flame may be difficult to extinguish, and the nozzle tip 27 and jet nozzle 26 may be contaminated with intruders. This prevents the discharge spark from becoming weaker and maintains good ignitability.

[0036] In addition, in the above embodiment, the main body part 2 and the extension part 3 are constructed separately, and it is difficult to assemble them. However, they may be formed into an integral structure. Also, Spipe 28 is not made of hard material, but is made of flexible material, and the inside is coated. A conducting wire may also be inserted.

[0037] Next, FIG. 5 shows an ignition device applied to a tabletop gas lighter as another example. The basic structure is the same as the previous example, and similar parts are given the same numbers. ing.

[0038] The desk lighter 50 in this example has a valve mechanism 8 arranged vertically. The case portion 55 in the lower main body portion 52 is provided in a shape that can stand up. The shape of the internal gas tank 7 is formed differently from the previous example depending on the situation. Also , the ignition lever 54 that operates the piezoelectric unit 20 disposed inside the main body 52 is arranged in the upper and lower directions. The piezoelectric unit 20 slides in the direction of the piezoelectric unit 20 in accordance with the pressing operation. The door portion 20a moves downward to generate a discharge voltage and operate the rotary lever 14. Also, The ignition lever 54 is provided so as to constitute an upper portion of the case portion 55.

[0039] On the other hand, the extension part 53 extending upward from the nozzle mechanism 8 of the main body part 52 is different from the previous example. The length of the lever, that is, the length of the metal cylinder body 25 and the gas pipe 28, is formed short. The shapes of the jet nozzle 26, nozzle cover 30, conductor 33, etc. are the same as in the previous example. The same effect can be obtained.

[Brief explanation of drawings]

[Fig. 1] A cross-sectional side view showing the overall configuration of an ignition device according to an embodiment of the present invention.

[Figure 2] Cross-sectional plan view of the device

[Figure 3] Enlarged view of main parts of Figure 1

[Figure 4] Enlarged perspective view showing the end of a covered conductor

[Fig. 5] A cross-sectional front view showing an ignition device of another embodiment.

[Explanation of symbols]

1 Ignition device (ignition rod) 2 Main body 3 Extension part 7 Gas tank 8 Valve mechanism 10 Nozzle parts 14 Rotating lever 20 piezoelectric unit 25 Metal cylinder 26 Spout nozzle 27 nozzle tip 28 gas pipe 32 Discharge electrode 33 Covered conductor 33a Coating 34 Terminal parts 50 Ignition device (tabletop lighter) 52 Main body 53 Extension

Claims (2)

[Scope of utility model registration request] 1. A gas tank, a valve mechanism that opens and closes the supply of gas from the gas tank, a gas pipe having one end connected to the valve mechanism and an ejection nozzle that ejects gas at the other end, the ejection nozzle and the ejection In an ignition device that includes a piezoelectric unit that applies a discharge voltage between a discharge electrode disposed near a nozzle and performs discharge ignition on the ejected gas, an ignition device for energizing the ejecting nozzle inside the gas pipe. 1. An ignition device characterized in that a covered conducting wire is inserted, and a cross-sectional area of a gas passage between the covered conducting wire and a gas pipe is set to be small. 2. The ignition device according to claim 1, wherein the covered conductor is disposed at the center of the gas pipe to minimize stray capacitance.