JP2573994Y2 - Ignition device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of an ignition device which discharges a flame ignited by discharge into a gas from a built-in gas tank.

[0002]

2. Description of the Related Art Conventionally, in an ignition device such as an ignition rod or a tabletop gas lighter, a flame is ejected from a rod-shaped tip end by a valve mechanism for opening and closing gas ejection. A gas pipe for supplying gas to the ejection nozzle and an electric wire for supplying electric power for discharge extend from the main body portion and are connected to the nozzle at the tip and the discharge electrode portion.

[0003]

However, the ignition device having the above-described gas pipe and electric wire connection structure and having a rod-shaped extended portion has a problem that ignition failure occurs due to delay of gas ejection.

That is, even if the supply of gas is started in response to the operation of the valve mechanism of the main body, there is a time delay before the gas is actually ejected from the ejection nozzle at the tip, and particularly, the gas is supplied to the tip. Is longer, the delay time is longer. Therefore, discharge ignition is performed with a certain delay from the gas supply accompanying the operation of the valve mechanism in response to the operation of the ignition lever.However, there is an individual difference in the operation speed of the ignition lever. It is difficult to ensure a good ignition state at all times because discharge occurs before or a large amount of gas is ejected.

[0005] The above-mentioned gas lag is increased when the cross-sectional area of the gas passage leading to the ejection nozzle at the tip end, that is, when the passage volume is large, the delay increases. Although effective in reducing delay, narrow gas passages are disadvantageous in ensuring their formation and connection.

On the other hand, in the discharge ignition by the piezoelectric unit, there is a stray capacitance between the electric wire for guiding the discharge voltage to the ejection nozzle and the ground side, and the high voltage generated in the piezoelectric unit becomes an AC voltage. Leakage occurs on the ground side through the stray capacitance, causing a problem of lowering ignitability.

In view of the above circumstances, the present invention has an ignition structure in which the structure for reducing the cross-sectional area of the gas passage with respect to the ejection nozzle at the tip is formed easily and with high reliability to improve ignitability. It is intended to provide a device.

[0008]

In order to achieve the above object, an ignition device according to the present invention comprises a gas tank, a valve mechanism, and a piezoelectric unit, a gas pipe for guiding gas to an ejection nozzle, and a gas nozzle and its vicinity. For igniting the ejected gas by a discharge between the discharge electrode and the discharge electrode, a covered wire for supplying electricity to the ejected nozzle is inserted into the gas pipe, and the covered wire is axially attached to the outer peripheral portion of the covering. And a gas passage cross-sectional area between the covered conductor and the gas pipe is set to be small.

Preferably, the core wire of the covered conductor is disposed at the center of the gas pipe to minimize the stray capacitance.

[0010]

In the igniter as described above, a sheathing wire for supplying electricity to the ejection nozzle is inserted into a gas pipe for guiding gas to the ejection nozzle at the tip of the ignition device, so that a gas passage between the sheathing wire and the gas pipe is provided. Reduce the cross-sectional area,
By increasing the flow velocity of the gas passing through the gas pipe, the gas can be ejected in a stable state at an early stage in response to the operation of the ignition lever, whereby good ignitability can be obtained. In addition, the passage itself of the gas pipe does not need to be small, the formation and connection of the gas passage can be reliably performed, high reliability can be obtained, and the structure can be implemented with a simple structure only by inserting the covered conductor. Further, since the coated conductor has a concave gas introduction groove extending in the axial direction in the outer peripheral portion of the coating, the gas passage can be secured more reliably.

On the other hand, by disposing the above-mentioned coated conductor so that its core wire is located at the center of the gas pipe, the distance from the ground side is increased, the floating capacity is minimized, and the piezoelectric ignition is connected to the ground side. The leak amount is reduced, and a good ignition rate is obtained.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view showing the entire configuration of an ignition rod as an example of an ignition device, FIG. 2 is a cross-sectional plan view, and FIG. 3 is an enlarged cross-sectional side view of a main part.

The ignition device 1 (ignition rod) includes a main body 2 and an extension 3 extending in a rod shape from the main body 2. In particular, in this embodiment, the main body 2 and the extension 3 are formed in a separate unit structure, and are integrated by engagement of the two.

The main body 2 has a case portion formed of a tank cover 5 and an intermediate case 6 in front thereof. The tank cover 5 is formed in a tubular shape with an open front, the intermediate case 6 is divided into right and left, a lower portion has a window 6a for an ignition lever, and a tip portion has an opening 6b for inserting an extension. Are formed.

A gas tank 7 containing high-pressure gas is installed inside the tank cover 5. The gas tank 7 is formed by connecting a tank upper lid 7b to a tank main body 7a, and a valve mechanism 8 for opening and closing gas supply from the gas tank 7 is arranged on the tank upper lid 7b. That is, a wick 9 is inserted into the gas tank 7, and gas is supplied through the wick 9, and the nozzle member 10 is interposed in the gas passage. The passage is opened by the forward movement of the nozzle member 10 to supply the gas, and the passage is closed by the backward movement by the spring, and the supply of the gas is stopped.
The gas supply amount, that is, the size of the flame is adjusted by the rotation of a flame adjusting knob 13 connected to the adjusting sleeve 12 and projected to the outside.

One end of a rotating lever 14 for opening the nozzle member 10 is engaged with the tip of the nozzle member 10 of the valve mechanism 8. The shield packing 15 made of an elastic material is attached to the foremost part of the. The other end of the rotating lever 14 is linked to a piezoelectric unit 20 described later.

An ignition lever 18 is disposed inside the window 6a of the intermediate case 6 so as to be slidable back and forth, and a piezoelectric unit 20 is provided at a rear portion of the ignition lever 18 between the ignition lever 18 and the tank cover 7b. is set up. The piezoelectric unit 20 supplies a discharge voltage, and the slide portion 20a retreats with the retreat operation of the ignition lever 18, and the protrusion is formed in accordance with the retreat.
20b is engaged with the rotating lever 14 to rotate it, and supplies the discharge voltage generated inside the piezoelectric unit 20.

That is, the rotary lever 14 is formed in a substantially L-shape, is supported so as to rotate about a fulcrum 14a of an intermediate portion, and is reciprocated by retreating the projection 20b of the piezoelectric unit 20. When the other end of the valve mechanism is rotated upward, the other end of the rotating lever 14 engaged with the nozzle member 10 of the valve mechanism 8 is moved so as to pull the nozzle member 10 forward, and the valve mechanism 8 is opened. To supply gas. The projection 20b also serves as one electrode terminal of the discharge voltage, and electricity is supplied to the nozzle member 10 from the projection 20b via the rotating lever 14 formed of a conductive resin.

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 to a contact 21a arranged on the side of an intermediate portion of the pipe holder 17 to be described later by an earth plate 21. . That is, the ground plate 21 has a base portion sandwiched between the piezoelectric unit 20 and the ignition lever 18, bends forward at the upper portion of the ignition lever 18, and further laterally and forwardly near the flange portion 17 d of the pipe holder 17. A contact 21a is formed on the side of the center line of the pipe holder 17 so as to press toward the center.
The ground plate 21 moves integrally with the sliding of the ignition lever 18.

Next, the extension portion 3 is provided with a rod-shaped metal cylinder 25.
A jet nozzle 26 for jetting gas is disposed inside the tip of the nozzle. The jet nozzle 26 has a nozzle tip 27 at the front end, a rear end portion is fitted to the front end portion of the gas pipe 28, and a nozzle cover 30 made of an insulating material such as plastic is provided on an outer peripheral portion thereof. . This nozzle cover 30
Has a cap-like holder portion 29 fitted from the jet nozzle 26 to the outer peripheral portion on the distal end side of the gas pipe 28. The rear end portion 29a of the holder portion 29 is formed with a rectangular flange projecting outward, and its four corners abut on the inner surface of the metal cylinder 25 and are arranged concentrically.

The nozzle cover 30 is provided with a holder
The cover part which is connected and extended at the upper part in front of 29
Has 31. The lower portion of the portion connected to the holder portion 29 which is the rear end portion of the cover portion 31 is cut out,
The front end portion of the jet nozzle 26 is exposed. Further, a front wall 31a is formed at a front end portion of the cover portion 31 at a position forward of the front end of the nozzle tip 27. This front wall 31a
The upper portion is cut out in a V-shape from the front of the nozzle tip 27 to form an open portion 31b. The open portion 31b secures ignition as shown in FIGS. Therefore, the opening is defined so that the discharge electrode side is directed inward of the cover 31 until the nozzle tip 27 is exposed.

Further, a slit is formed in the front wall 31a below the V-shaped lower point of the opening 31b. Therefore, the front wall 31a has a fan shape facing each other when viewed from the front. Further, on both sides of the outer surface of the cover portion 31, a metal cylinder 25
An engagement groove 31c is formed to engage with the tip of the bent piece 25d.

On the other hand, a crater 25a through which a flame passes is opened at the center of the end face at the tip of the metal cylinder 25, a plurality of air inlets 25b are opened at the side of the rear part, and further above the rear part. A discharge electrode 32 is provided in which a part of the cylinder is bent toward the center. An air inlet 25b is also opened at the position where the discharge electrode 32 is formed, and four air inlets 25c extend in the axial direction at a rear portion slightly away from the front end and at a position corresponding to the cover portion 29. It is formed.

The nozzle cover 30 inserted into the distal end of the metal cylinder 25 as described above has a V-shaped opening 31
The discharge electrode 32 is located facing the upper part of a. Further, the air introduced from the air inlet 25 c opened in the metal cylinder 25 flows into the space inside the cover 31 from the space on the outer periphery of the holder 29.

The gas pipe 28 inserted from the rear into the inner hole of the holder portion 29 of the nozzle cover 30 is provided with the jet nozzle
The gas pipe 28 is formed of a hard material, and the gas pipe 28 passes through the center of the metal cylinder 25 backward, and the rear end projects from the rear end of the metal cylinder 25. It is formed in the length which is. A pipe holder 17 is fitted into the rear ends of the metal cylinder 25 and the gas pipe 28.

A sheathing wire 33 is inserted into the gas pipe 28. The sheathing wire 33 is formed by removing both ends of the sheathing 33a, exposing the center wire, and covering the middle portion of the sheathing wire 33a.
The outer diameter of a has a predetermined minute gap with respect to the inner diameter of the gas pipe 28 so that the cross-sectional area of the gas passage between them is small. Further, as shown in FIG. 4, a concave gas conducting groove 33b extending in the axial direction is formed in the outer peripheral portion of the coating 33a of the coating conductor 33.

A terminal member is provided at the rear end of the gas pipe 28.
34 is installed. The terminal member 34 is formed in a hollow sleeve shape, one end is inserted into the gas pipe 28 from the pipe holder 17, and the other end is formed in a flange shape with a large outer diameter, and an end hole of the pipe holder 17 is formed. Is engaged. Then, the coated conductor 33 is connected to the ejection nozzle 26 at the tip.
And the terminal member 34 at the other end are electrically connected.

The pipe holder 17 mounted on the rear end of the gas pipe 28 is formed in a substantially cylindrical shape, and the insertion hole 17a at the center where the gas pipe 28 is inserted from the front has a large diameter at the opening and an intermediate portion. A peripheral groove 17b on the outer periphery of the rear end portion is provided so as to be able to engage with the engaging portion 6c of the intermediate case 6. Then, the terminal member 34 is fitted from the rear end thereof, and the shield packing 15 mounted on the tip end portion of the nozzle member 10 of the valve mechanism 8 can abut on the back surface of the terminal member 34. On the other hand, the front end of the pipe holder 17 is inserted into the rear end of the metal cylinder 25, and the intermediate flange 17
The rear end of the metal tubular body 25 contacts and is locked by d.

The extension 3 is assembled to the main body 2 as described above by inserting the base of the rod-shaped extension 3 through the opening 6b of the main body 2 and engaging them together. Things. That is, the pipe holder 17 pre-assembled with the gas pipe 28 and the metal cylinder 25 is set in the divided intermediate case 6 of the main body 2, and the engaging portion 6c is engaged with the circumferential groove 17b of the pipe holder 17. The intermediate case 6 is closed from both sides and integrated.

When integrated by 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 communicate. The contact 21a of the earth plate 21 is in contact with the peripheral surface of the metal cylinder 25, so that one of the poles with respect to the discharge electrode 32 conducts.
A high voltage can be applied from the nozzle member 10 to the terminal member 34, and the other electrode to the nozzle tip 27 conducts, so that the piezoelectric unit 20
Are electrically connected.

Next, the ignition operation will be described. When the ignition lever 18 is pushed in, the valve member 8 of the valve mechanism 8 is pulled out with the movement of the projection 20b of the piezoelectric unit 20. Is opened to supply gas. The gas supplied from the nozzle member 10 passes through the narrowed gas passage between the outer periphery of the coating conductor 33 of the gas pipe 28 and the gas conducting groove 33b of the coating 33a, and the nozzle tip of the ejection nozzle 26 at the tip of the extension 3 Emitted from 27. In addition,
Due to the groove 33b of the covered wire 33, the wire is
Even when 33 moves and the end face of the coating 33a closes the opening of the ejection nozzle 26 or the terminal member 34, the gas passage is secured.

At this time, the covered conductor 33 is placed in the gas pipe 28.
The gas flow velocity is high through a small passage cross-sectional area with the outer periphery of the gasket, and the arrival time is shortened due to the small passage volume therebetween, from the opening operation of the valve mechanism 8 to the gas ejection by the ejection nozzle 26. The time is shortened.

Further, a discharge voltage (AC voltage) is generated from the piezoelectric unit 20 in accordance with the operation of the ignition lever 18, and this discharge voltage passes through the metal cylinder 25 and the conducting wire 33 in the gas pipe 28, respectively. Is applied between the discharge electrode 32 and the nozzle tip 27 to ignite the ejected gas.

At this time, in addition to the improvement of the ignitability associated with the stable gas supply due to the shortened arrival time, a part of the ejected gas accumulates in the cover portion 31 of the nozzle cover 30 and the air inlet 25c at the back. When mixed with air introduced from the air, the ignitability due to the discharge spark is improved. The conductor 33 is a gas pipe
28 is inserted into the core, and its core wire is
, The distance between the grounds is long, the floating capacity in the discharge of the AC high voltage is minimized, the leak amount is reduced, the discharge energy is high, and the ignition rate is improved.

Further, the tip of the nozzle tip 27 is located inside the cover portion 31 of the nozzle cover 30 and is covered with the nozzle cover 30 and the metal cylinder 25, so that the flame can be generated without direct action of wind, oil, fireworks and the like. It is difficult to extinguish and also prevents the invasion of the nozzle tip 27 and the ejection nozzle 26 from adhering to prevent the discharge spark from weakening, thereby maintaining good ignitability.

In the above embodiment, the main body 2 and the extension 3 are formed separately and assembled, but they may be formed integrally. Further, the gas pipe 28 may be formed of a flexible member without using a hard material, and a covered conductor may be inserted therein.

Next, FIG. 5 shows an ignition device applied to a tabletop gas lighter as another embodiment. The basic structure is the same as that of the previous example. ing.

The desk lighter 50 in this example has a lower main body having a valve mechanism 8 and the like arranged vertically.
The case 55 in the case 52 is provided in a shape capable of standing up, and the shape of the internal gas tank 7 is formed differently from the previous example according to this shape. Further, an ignition lever 54 for operating the piezoelectric unit 20 disposed in the main body 52 is disposed so as to be slidable in the vertical direction, and the sliding portion 20a of the piezoelectric unit 20 moves downward in accordance with the pressing operation. Then, the discharge voltage is generated and the rotating lever 14 is operated. Further, the ignition lever 54 is provided so as to constitute an upper portion of the case portion 55.

On the other hand, the extension 53 of the main body 52 extending upward from the nozzle mechanism 8 is shorter in length than the previous example, that is, the length of the metal cylinder 25 and the length of the gas pipe 28. The shapes of the ejection nozzle 26, the nozzle cover 30, the conducting wire 33, and the like are provided in the same manner as in the previous example, and the same operation is obtained.

[Brief description of the drawings]

FIG. 1 is a sectional side view showing an entire configuration of an ignition device according to an embodiment of the present invention.

FIG. 2 is a cross-sectional plan view of the apparatus.

FIG. 3 is an enlarged view of a main part of FIG. 1;

FIG. 4 is an enlarged perspective view showing an end of a covered conductor.

FIG. 5 is a sectional front view showing an ignition device of another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ignition device (ignition rod) 2 Main part 3 Extension part 7 Gas tank 8 Valve mechanism 10 Nozzle member 14 Rotating lever 20 Piezoelectric unit 25 Metal cylinder 26 Jet nozzle 27 Nozzle tip 28 Gas pipe 32 Discharge electrode 33 Coated wire 33a Coated 34 Terminal Components 50 Ignition device (desktop lighter) 52 Main body 53 Extension

Continuation of the front page (56) References Japanese Utility Model Sho 62-81858 (JP, U) Japanese Utility Model Sho 59-191061 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) F23Q 2 / 28 121

Claims (1)

(57) [Scope of request for utility model registration] 1. A gas tank, a valve mechanism for opening and closing gas supply from the gas tank, a gas pipe having one end connected to the valve mechanism and jetting gas at the other end, and the jet nozzle and the jet nozzle A piezoelectric unit for applying a discharge voltage between the discharge electrode and a discharge electrode disposed in the vicinity of the nozzle, wherein the ignition device is configured to perform discharge ignition on the ejected gas. outside of the coated wire was inserted, and the coated conductive wire is coated
An ignition device having a concave gas introduction groove extending in an axial direction in a peripheral portion, and having a small gas passage cross-sectional area between the covered conductor and the gas pipe.