JP3530584B2 - Push button type 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 push-button ignition device used in various gas appliances such as a gas water heater and a gas stove. More specifically, the present invention relates to a push-push operation for repeating heart-shaped steps. Using a push-push mechanism that moves the engagement pin engaged with the guide groove (hereinafter simply referred to as the guide groove) to go around the heart-shaped stepped guide groove, one push button can be used for ignition and extinguishing operations. A push-button ignition device that enables

[0002]

2. Description of the Related Art A push-button ignition device using a conventional push-push mechanism will be described with reference to FIG. FIG. 1 shows an overall configuration of a push button ignition device. A gas inlet 29 is provided in a main body sleeve 1, a spindle 2 is movably inserted into the main body sleeve 1, and a return spring 3 is provided.
Is biased forward (to the left in the figure) by. A main valve 5 that opens and closes the main discharge port 4 of the main body sleeve 1 and a small-diameter valve portion 7 that opens and closes the ignition pilot discharge port 6 of the main body sleeve 1 are provided on the spindle 2. The main discharge port 4 and the ignition pilot discharge port 6 communicate with the main nozzle and the ignition pilot nozzle (not shown) of the combustion section, respectively. Reference numeral 9 is an O-ring for gas sealing, and 8 is an O-ring retainer.

A magnet safety valve 12 is attached to the rear portion of the main body sleeve 1 by an end plate 10 via an O-ring 11, and a gas passage 13 connected to the main discharge port 4 and the ignition pilot discharge port 6 is opened and closed. A safety valve 14 as a gas supply valve is provided. A casing 15 is attached to a front portion of the main body sleeve 1, a movable portion 16 is accommodated inside the casing 15 via a spring 17, and a closed circuit guide groove 18 (see FIG. 3) is formed on an outer surface thereof. ing. The movable part 16 is retracted by a pressing operation, the spindle 2 is pushed rearward when the movable part 16 is retracted, the main valve 5 is opened, and then the small diameter valve part 7 and the safety valve 1 are located near the end position.
4 is open.

At the position corresponding to the guide groove 18, the base end bent portion of the engaging pin 21 having the tip bent portion as an engaging portion is supported by the casing 15, and an igniter (not shown) for the combustion portion is provided. ) Electrically connected to the ignition switch 22
Are arranged on one side of the engagement pin 21. Engagement pin 2
The proximal bent portion of No. 1 is prevented from coming off by the pressing spring 23, and the engaging portion at the tip is inserted into the guide groove 18 through the long hole 24 of the casing 15. FIG. 5 shows the operation of the push-push mechanism. When the movable portion 16 is repeatedly pressed twice from the start end position to the end position, the tip end engaging portion is engaged with the engagement pin 21 in the guide groove 18. Is moving
A push-push mechanism 25 that makes a round in the guide groove 18 is configured. Further, the ignition switch 22 is contact-operated by an engagement pin 21 that swings left and right according to the shape of a guide groove 18 described later.

3 and 4 show the shape of the guide groove 18 in detail. FIG. 3 is a plan view and FIG. 4 is a development view showing a sectional shape. The guide groove 18 is formed in a substantially heart shape as a whole, and extends from the point a corresponding to the start position of the movable portion 16 to the point b corresponding to the end position of the movable portion 16.
8a, a second guide groove 18b extending from a point b to a point c corresponding to an intermediate position of the movable portion 16, and a movable portion 16 from the point c.
Third guide groove 18c extending to point d corresponding to the unlocking position of No. 4 and fourth guide groove 18d extending from point d to point a
And are continuously provided. A step portion 26 that prevents the engaging pin 21 from returning is provided at the connecting portion of each of the guide grooves 18a to 18d.

Next, the operation of the push-button ignition device configured as described above will be described mainly with reference to FIGS. 5 and 7. FIG. 5 (A) shows the extinguishing state of the ignition device. The movable part 16 is at the starting end position (point a in FIG. 7), is projected forward, and engages with the engaging part (hereinafter referred to as the engaging part) at the tip of the engaging pin 21. Dowel pin 21
Is located at the starting end (point a) of the guide groove 18,
The ignition switch 22 is turned off at the position of the engagement pin 21.
It keeps in a state. In this state, when the movable portion 16 is pressed from the start end position to the end position, the movable portion 16 is retracted against the spring 17 (FIG. 1), and the engagement pin 21 is moved to the first position during the recession. When guided by the guide groove 18a and the movable part 16 is further retracted, the spindle 2 is pushed rearward against the return spring 3 (FIG. 1) and the main valve 5 is opened (point f in FIG. 7). ), The engagement pin 21 swings, the ignition switch 22 is turned on (point e in FIG. 7), and the igniter in the combustion section starts to operate. Further, the small-diameter valve portion 7 (j in FIG.
Point), the magnet safety valve 12 (point g in FIG. 7) is sequentially opened (the state shown in FIG. 5B), and by this series of operations, raw gas causes the main discharge port 4 and the ignition pilot discharge port 6 to flow. It is supplied to the combustion section through and is ignited by an igniter.

When the hand is released from the pressing operation at the end position (B), the spindle 2 and the movable portion 16 are returned by the operation of the return spring 3, the engaging pin 21 is guided to the second guide groove 18b, and the ignition switch 22. And the ignition switch 22 is turned off, the engagement pin 21 is locked at the point c by the biasing force of the spring 17, and the movable portion 16 is held at the intermediate locking position ((C) in FIG. 5). State).

When extinguishing a fire, the pressing operation of FIG.
As shown in (D) of FIG.
8c to reach point d, the lock is released when the hand is released from the pressing operation, the movable portion 16 returns by the urging force of the spring 17, and the engagement pin 21 is guided to the fourth guide groove 18d.
It returns to the point and returns to the fire extinguishing state shown in FIG.

[0009]

However, in the conventional push-button ignition device, the ignition / fire extinguishing operation (main valve 5, small diameter) is performed by opening and closing a plurality of valves with a simple pushing operation and with a short pushing stroke. Since the valve section 7, the magnet safety valve 12, and the ignition switch 22 are operated),
There is a problem that malfunctions are likely to occur even if there is a slight manufacturing error. Further, in order to prevent malfunction, high accuracy is required for each combined positional relationship, which is expensive. Further, when a margin is provided for each related dimension on the operation stroke, the entire ignition device becomes large, and the entire operation stroke becomes large, and the operability is impaired.

The conventional measures for preventing this malfunction will be described in more detail below. For example, in order to prevent malfunctions that immediately extinguish the fire after a pressing operation is performed at the time of ignition to release the hand, manufacturing consideration must be taken in advance. The following two causes can be assumed as the malfunction. The first cause is that the pressing operation at the time of ignition has a short stroke. If the pressing operation cannot reach the end position, the magnet safety valve 12 does not fully open and does not reach the adsorption position. Therefore, only the main valve 5 opens after releasing the pressing, the magnet safety valve 12 closes, and the fire is extinguished. Will end up. In order to prevent this short stroke, light operability is provided, and in terms of the dimensions of the mechanism, a sufficient gap is provided between each movable part that is moved by the pushing operation and the fixed part so that the stroke is not restricted. It is provided. As shown in FIGS. 1 and 5, when the pressing operation at the time of ignition is performed, the movable portion 16 is retracted and moved (FIGS. 5A to 5B), and the engagement pin 21 is moved to the first guide. The guide is performed according to the groove 18a, and the side of the engaging portion of the engaging pin 21 is brought into contact with the guide groove side wall 26 at the end position (point b). Further, the movable portion 16 is retracted while abutting, and the end position (b
The guide groove side wall 26 of (point) moves the engaging pin 21 in the pressing direction. On the other hand, the spindle 2 which is interlocked with the movable portion 16 opens the main valve 5 (FIG. 1A → B), opens the magnet safety valve 12 and opens the adsorption portion 28 provided at the other end of the pushed shaft 30. It moves until it comes into contact with the electromagnet portion 27. The stroke until the attracting portion 28 and the electromagnet portion 27 contact each other is a stroke required for the magnet safety valve 12 to be opened and attracting. Therefore, even when the engaging pin 21 is moved in the pressing direction, the stroke must not be restricted at the end of the elongated hole 24 that is inserted. Here, the original role of the long hole 24 will be described. Long hole 2
Reference numeral 4 regulates the movement of the main valve 5 in the returning direction while keeping the engagement pin 21 and the movable portion 16 locked at the intermediate position (point c) by the end portion of the fixed long hole 24. It is provided to keep the valve open (state shown in FIG. 1C).
Further, it is provided in order to prevent the magnet safety valve 12 from being restarted at the time of fire extinguishing by restricting the movement in the pressing direction while keeping the engagement pin and the movable portion 16 locked at the locking release position (point d). ) State). However, the elongated hole 24 must not regulate the stroke during the pressing operation to the above-mentioned end position (point b). Therefore, as shown in FIG. 6A, in the positional relationship between the slot 24 and the engagement pin 21, the slot 2
The width H00 of 4 is increased, and the end position of the pressing operation (see FIG.
A gap H10 with the engagement pin 21 in (B)) is provided. However, if the width H00 of the elongated hole 24 is made too large, the moving distance H20 in the pressing direction of the engagement pin 21 from the intermediate position (C) to the locking release position (D) becomes large, and the locking release position (D). ), The gap R4 (FIG. 1D) between the spindle 2 and the magnet safety valve 12 becomes small.

This gap R4 (FIG. 1D) is the most important gap. This is because the lock release position (d
Do not open the magnet safety valve 12 at the point). If the magnet safety valve 12 that is closed by the fire extinguishing operation is opened, the gas passage is opened without discharge of the igniter, and raw gas flows out, which is dangerous. Therefore, the gap R4 (FIG. 1D) between the spindle 2 and the magnet safety valve 12 must be set large in advance. Further, in order to secure the clearance R4, when the operation stroke itself is increased to cope with the problem, the small-diameter valve portion 7 that opens and closes the pilot discharge port 6 for ignition provided in the spindle 2 and the O-ring 9 are related. The dimensions must be further apart in the direction of movement of the spindle 2. Because the ignition pilot flame for assisting the ignition of the main burner is unnecessary except for the pushing operation to the end position (B) during the ignition operation, and the ignition pilot discharge port 6 is increased by increasing the operation stroke. This is because the valve must not be opened unnecessarily. That is, the small-diameter valve portion 7 for the ignition pilot is opened only by the pushing operation of the terminal end position (B) during the ignition operation, and the other stop position (A), the intermediate locking position (C),
The unlocking position (D) must be set so that the valve cannot be opened. In addition, when the operation stroke becomes large, the related dimensions other than the above must be naturally increased, and the size of the entire ignition device becomes large. In addition, it must be concerned that increasing the operation stroke will reduce the operability. On the other hand, if the operation stroke is not increased, the accuracy of each component must be increased in order to ensure the related dimensions, resulting in an expensive structure. Therefore, there is a problem even if the operation stroke is shortened or increased.Therefore, the magnet safety valve is securely attracted and held by the pressing operation at the time of ignition, and the magnet safety valve is not restarted by the pressing operation at the time of extinguishing the fire. There has been a demand for a push-button ignition device that can be manufactured at a low cost because of its reliable operation and safe operation.

Next, the second cause of extinguishing the fire after the ignition pressing operation is when the operation of the swinging engagement pin in the push-push mechanism is unstable. When the hand is released after the pressing operation at the time of ignition, the engagement pin 21 is normally held at the intermediate position (point c in FIG. 5). Distance to point)
2 (FIG. 3) cannot be increased, and if the operation of the engagement pin becomes unstable, the engagement pin is not held at the intermediate position and returns to the stop position (point a) to extinguish the fire. A so-called short circuit phenomenon of the engagement pin 21 occurs. In order to prevent the engagement pin 21 from malfunctioning, with respect to the shape of the guide groove 18, in particular, the shape of each of the second guide groove 18b and the third guide groove 18c and the step 26 between the guide groove and the guide groove, At the intermediate position to be locked (point c), the engagement pin 21 is in the unlocked position (d).
It must be manufactured with careful attention to deformation, surface roughness, and burrs so that it will not slip to the point). Therefore, it is an object of the present invention to provide a push-push mechanism that solves the above problems and can be manufactured at low cost, and that operates more stably.

[0013]

A push-button ignition device of the present invention which solves the above-mentioned problems is provided with a movable part which is moved by a pressing operation at the time of ignition, and reaches from a start end position of a stroke to an end position thereof, and is pushed and released. It is locked at the intermediate position of the return stroke by the biasing spring force, and is pushed from the intermediate position to the predetermined unlocked position by the pressing operation again at the time of fire extinguishing,
A push-push mechanism that returns to the starting end position by the biasing spring after being pushed and released, a movable portion that moves by a pressing operation at the time of ignition, a fixed portion that slidably supports the movable portion, the movable portion or the fixed portion. A first guide groove provided on either one of the portions from the start end position to the end position,
A second guide groove from the terminal end position to the intermediate position, a third guide groove from the intermediate position to the locking release position, and a fourth guide groove that returns from the locking release position to the starting end position form a full circle,
At the boundary with each groove, a step part for preventing reversion is provided on the heart-shaped stepped guide groove provided at the groove bottom and either the movable part or the fixed part on the other side, and the guide part is guided by the guide groove and shakes. A moving engagement pin, a long hole for inserting the engagement pin, regulating the movement of the engagement pin in the returning direction at the intermediate position, and regulating the movement of the engagement pin in the pressing direction at the locking release position, and the starting end. An igniter that starts discharge by moving from the position to the end position and a main valve that coaxially opens and closes the gas passage are provided, and the main valve is opened at the intermediate position in conjunction with the movable part, and the start end position is set. In a push-button ignition device including a spindle that is closed by a valve and a magnet safety valve that is opened by a pressing operation to the end position, is adsorbed at the end position to hold the valve open, and is closed in an abnormal state, The long hole has a hole width in the pressing operation direction. Against the portion corresponding to the serial unlocking position, and summarized in that provided widely in locations corresponding to the end position.

According to a second aspect of the present invention, in the push-button ignition device according to the first aspect of the present invention, a stepped portion is provided at an end of the elongated hole in which the engagement pin is restricted from moving in the return direction at the intermediate position. The point is that it is provided.

[0015]

In the push-button ignition device according to the first aspect of the present invention having the above-mentioned structure, the width of the long hole in the pressing operation direction is set larger at the position corresponding to the end position than at the position where the lock is released. As a result, the distance by which the engagement pin moves in the elongated hole at the time of releasing the lock becomes small and becomes large at the end position. That is, in the pressing operation to the end position at the time of ignition, the elongated hole does not hinder the movement of the engaging pin in the pressing direction, and the pressing stroke to the position where the magnet safety valve is securely attracted and held is secured. Further, in the pressing operation to the unlocking position during the fire extinguishing operation, the elongated hole restricts the movement of the engagement pin in the pressing direction, and the magnet safety valve is not opened when the magnet safety valve is closed.

Also, in the push-button ignition device according to the second aspect of the invention, the stepped portion is provided at the end of the elongated hole where the movement of the engagement pin in the returning direction is restricted at the intermediate position, so that the engagement pin is released. Securely locks in the intermediate position. In other words, the step portion of the long hole at the intermediate position securely locks the engaging pin,
The problem that the engagement pin short-circuits is prevented.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to further clarify the structure and operation of the present invention described above, preferred embodiments of the push button ignition device of the present invention will be described below. The push-button ignition device is characterized in that the push-push mechanism has a long hole shape, and other mechanical configurations are the same as those of the conventional one. Therefore, the description of the conventional technique will be omitted.

As shown in FIG. 6B, the shape of the elongated hole 24 through which the engaging pin 21 is inserted is such that the hole width at the portion corresponding to the end position (B) of the engaging pin 21 at the time of ignition operation is large. The gap H1 between the end of the elongated hole 24 and the engagement pin 21 is sufficiently large. On the other hand, the hole width is reduced in the portion corresponding to the lock release position (D), and the movement distance H2 of the engagement pin 21 in the elongated hole 24 from the intermediate position (C) to the lock release position (D) is reduced. . Further, at the end of the elongated hole 24 in which the engagement pin is restricted from moving in the return direction at the intermediate position (C), the step portion 20 that restricts the movement from the intermediate position (C) to the unlocking position (D). Is provided to prevent a short circuit phenomenon of the engagement pin 21 described later.

FIG. 1 is a schematic configuration diagram of a push-button ignition device as one embodiment, and FIG. 2 is an explanatory diagram showing the operation of a push-push mechanism. 1A and 2A
Shows a fire extinguishing state of the push-button ignition device, in which the movable portion 16 is at the starting end position (point a in FIG. 7) and is projected forward (to the left in the drawing), and the engaging portion at the tip of the engaging pin 21 Is located at the starting end (point a) of the guide groove 18, and the ignition switch 22 is kept in the OFF state at the position of the engaging pin 21. In this state, when the movable portion 16 is pressed from the start end position (A) to the end position (B), the movable portion 16 is retracted against the spring 17, and the engaging pin 21
Is guided along the first guide groove 18a and the movable portion 16 is further retracted, the spindle 2 is pushed rearward against the return spring 3 (FIG. 1) and the main valve 5 is opened (FIG. 7). 2), the engagement pin 21 swings, the ignition switch 22 is turned on (point e in FIG. 7), and the igniter in the combustion section starts operating (state shown in FIG. 2B).

When the movable portion 16 is further retracted, the spindle 2 is pushed rearward against the return spring 3, and the small diameter valve portion 7 (point j in FIG. 7) and the magnet safety valve 12 (g in FIG. 7).
Points) are sequentially opened, whereby raw gas is supplied to the combustion section through the main discharge port 4 and the ignition pilot discharge port 6 and ignited by the igniter. When the movable part 16 is further retracted, the attracting part 28 of the magnet safety valve 12 moves to a position where it comes into contact with the electromagnet part 27. Electromagnet part 2
The electromagnetic force 7 is generated by the electromotive force of the thermocouple and the electric power of the dry battery to adsorb the adsorption portion 28, and the safety valve 14 provided at the other end of the shaft 30 integrated with the adsorption portion 28 is held open. In this case, the safety valve 14 cannot be opened and held unless the adsorption portion 28 is pressed against the electromagnet portion 27 with a sufficient stroke.
Therefore, at the relevant position of the push-push mechanism 25, as shown in FIG.
A gap H1 is provided in the
To prevent the stroke from being regulated while the magnet safety valve 12 is being opened.

The clearance H1 can be substituted by extending the end position (point b) of the first guide groove 18a and providing play so that the engagement pin 21 does not hit the wall end of the first guide groove 18a. However, it is not provided at the end position (point b) of the first guide groove 18a for the following reason. The reason is that the engaging pin 21 which is guided by the guide groove 18 and swings to move.
This is for correcting the inclination of (1) at the end position (point b) of the first guide groove 18a. When the pressing operation at the time of ignition is performed, the side of the engaging portion of the engaging pin 21 is brought into contact with the guide groove side wall 26 at the end position (point b) to move in the pressing direction, and the engaging pin 21 is moved by the contact. Correct the inclination. End position ((B) in Figure 2)
When the hand is released from the pressing operation (shown in FIG.
The engaging pin 21 corrected perpendicularly to is guided by the second guide groove 18b and locked at the point c. If the engaging pin 21 is not straightened and is not corrected, the end of the engaging pin 21 rides on the step 26 of the guide groove 18 in the opposite direction and is not properly guided. Without reaching it, the vehicle runs backward in the first guide groove 18a and returns to the point a. That is, due to the inclination of the engagement pin 21, the fire is extinguished without reaching the intermediate position (C) after the ignition operation is pressed. The problem is that the side wall of the guide groove at the end position b comes into contact with the side of the engaging portion of the engaging pin 21, whereby the inclination of the engaging pin 21 is corrected and reverse running to the first guide groove 18a is prevented. It Therefore, as shown in FIG. 6B, the gap H1 at the end position (B) is provided in the elongated hole 24.

When the hand is released from the pressing operation at the terminal position (B), the spindle 2 and the movable portion 16 are returned by the operation of the return spring 3, and the engaging pin 21 is returned as shown in the intermediate position (C) of FIG. Is guided by the second guide groove 18b and separated from the ignition switch 22, and after the ignition switch 22 is turned off, the engagement pin 21 is locked at the point c by the urging force of the spring 17 and the movable portion 16 is moved to the intermediate position. It is held in (C). When the engagement pin 21 is guided to the second guide groove 18b, the return force of the spring 17 causes the side wall 19 of the second guide groove 18b.
When the engagement pin 21 hits and bounces, it may reach the point d and return to the point a without being held at the intermediate position (C). In other words, the so-called engagement pin 21 short-circuits the guide groove 18 once around the guide groove 18 with only one pressing operation at the time of ignition. The stepped portion 20 that restricts the movement to the unlocking position d is provided in the elongated hole 24 portion. Therefore, even if the engagement pin 21 bounces, the stepped portion 20 of the elongated hole 24 prevents the engagement pin 21 from short-circuiting.

When extinguishing the fire, when the movable portion 16 is pushed from the intermediate position (C) to the unlocked position (D),
The engagement pin 21 is guided by the third guide groove 18c to the point d (FIG. 2D), and is pushed by the side wall of the guide groove 18 at the point d so that the engagement pin 21 moves in the elongated hole 24. The lock is released by moving only the gap H2 (FIG. 6B). The end portion of the elongated hole 24 corresponding to the unlocking position (point d) is located at the end position (b).
The movement H2 of the engagement pin 21 in the long hole 24 is made small because it is provided closer to the starting end position (point a) than the end of the long hole 24 corresponding to the point (FIG. 2). Therefore, the condition (1) below, which is the condition at the related positions shown in FIGS. 1C and 1D, that is, the condition that the magnet safety valve 12 is not restarted during the fire extinguishing operation, is secured. When the pressing operation is released, the movable portion 16 returns by the urging force of the spring 17, the engagement pin 21 is guided by the fourth guide groove 18d and returns to the point a, and FIG.
Return to the extinguishing state shown in.

L2 + H2 <R3 (1) Distance between points (c) and (d) in the L2 guide groove 18 (FIG. 3) When the H2 lock is released, the engagement pin 21 has a long hole 24. Distance to move inside (Fig. 6) Gap between R3 spindle 2 and magnet safety valve 12 (Fig. 1 (C))

The embodiments of the present invention have been described above. However, the present invention is not limited to these embodiments, and it is needless to say that the present invention can be implemented in various modes without departing from the gist of the present invention. Is. For example, the guide groove 18 is provided in one movable portion 16 of the push-push mechanism, and the engagement pin 2 is provided in the other fixed portion that slidably supports.
However, the engaging pin 21 may be provided on one of the movable portions 16 and the guide groove 18 may be provided on the other fixed portion. Further, the stepped portion provided in the long hole is not limited to the shape of the embodiment, and may have a shape that reliably locks the engagement pin at the intermediate position, for example, a shape having a concave dent. Further, in the extinguishing state of the push-button ignition device, the engagement pin 21 is not limited to contact the side wall of the groove at the starting end position (point a) of the guide groove 18 to lock the movable portion 16. It is also possible to regulate the return of the movable portion 16 by the provided positioning stopper, extend the starting end position of the guide groove 18, and provide a gap between the locking pin 21 and the side wall of the groove at the starting end position (point a).

[0026]

As described above in detail, according to the push-button ignition device of the first invention, the magnet safety valve is securely attracted and held during the pressing operation during ignition, and the pressing operation during extinguishing is performed. The gas passage is safely closed without reopening the magnet safety valve. Further, by ensuring the reliable operation, the operation stroke can be further reduced, the operability is improved, and the manufacturing can be performed at low cost. Further, the push-button ignition device according to the second aspect of the present invention can provide an excellent effect of preventing the short circuit phenomenon of the engaging pin by providing the step portion in the long hole.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a push button ignition device as one embodiment.

FIG. 2 is an explanatory diagram showing the operation of the push-push mechanism according to the embodiment of the present invention.

FIG. 3 is a plan view showing a guide groove of a push-push mechanism.

FIG. 4 is a development view showing a cross-sectional shape of a guide groove of a push-push mechanism.

FIG. 5 is an explanatory diagram showing the operation of a conventional push-push mechanism.

FIG. 6 is a comparative view of elongated holes in an embodiment of the present invention and a conventional push-push mechanism.

FIG. 7 is a diagram showing the operation of the push-push mechanism.

[Explanation of symbols]

12 Magnet safety valve 16 Moving part 18 guide groove 21 Engagement pin 24 long holes 25 push push mechanism

Claims (2)

(57) [Claims] 1. A movable part that moves by a pressing operation at the time of ignition is provided, and a stroke reaches from a start end position to an end position,
After pushing and releasing, it is locked at the intermediate position of the return stroke by the biasing spring force, and it is pushed from the intermediate position to the predetermined unlocked position by the pressing operation again at the time of extinguishing, and after pushing and releasing, the starting end position by the biasing spring. A push-push mechanism that returns to a movable portion that is moved by a pressing operation at the time of ignition, a fixed portion that slidably supports the movable portion, and one of the movable portion and the fixed portion that are provided at the start end. The first guide groove from the position to the end position, the second guide groove from the end position to the intermediate position, the third guide groove from the intermediate position to the unlocking position, and the returning from the unlocking position to the starting position. 4 A guide groove forms one round groove, and a heart-shaped stepped guide groove having a step portion for preventing reversion is provided at the groove bottom at the boundary with each groove, and either the movable portion or the fixed portion. Set on the other The engaging pin that is swung by being guided by the guide groove and the engaging pin are inserted, the engaging pin is restricted in the returning direction at the intermediate position, and the engaging pin is pressed in the pressing direction at the unlocked position. A long hole that restricts movement, an igniter that starts discharge when moving from the start position to the end position, and a main valve that coaxially opens and closes the gas passage are provided. It has a spindle that opens the valve and closes it at the start position, and a magnet safety valve that opens when pressed to the end position, adsorbs at the end position, holds the valve open, and closes when there is an abnormality. In the push button ignition device, the elongated hole is widely provided at a position corresponding to the end position with respect to a position where the hole width in the pressing operation direction corresponds to the locking release position. Push button type ignition device. 2. The push-button ignition device according to claim 1, wherein a step portion is provided at an end portion of the elongated hole in which the engagement pin is restricted from moving in the return direction at the intermediate position.