JPH0882418A - Push bottom ignition device - Google Patents

Abstract

PURPOSE: To reliably operate an ignition switch utilizing a push-push mechanism and additionally open a gas supply valve prior to the operation of the ignition switch in a push button type ignition device including the push-push mechanism. CONSTITUTION: A spindle 2 for opening a gas supply valve is moved by pushing a push button 20 through an ignition lever 19 and an interlocking member 16. With the movement of the spindle 2 a main valve 5 and a small size valve part 7 are opened and thereafter a safety valve 14 is opened to hereby supply raw gas from a main discharge port 4 and a pilot discharge port 6. A heart- shaped guide groove 18 is formed in the interlocking member 16. A casing 15 includes an engagement pin 21 having a tip end serving as an engagement part 21a and an ignition switch 22 pushed and actuated with the engagement pin 21, the ignition switch being provided on one side of the engagement pin 21. In a process where the push button 20 is operated from an initial end position to a final end position, first the engagement pin 21 is oscillated following the shape of the guide groove 18 to actuate the ignition switch 22 and thereafter the spindle 2 opens the safety valve 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a push-button type ignition device used in various gas appliances such as a gas water heater and a gas stove, and particularly, a push operation is repeated (push-push operation).
Causes the engagement pin engaged in the closed circuit heart-shaped stepped guide groove (hereinafter simply referred to as guide groove) to move,
The present invention relates to a push-button ignition device that uses a push-push mechanism that goes around a heart-shaped stepped guide groove to enable ignition and extinction with a single push button.

[0002]

2. Description of the Related Art Conventionally, as a push-button ignition device of this type,
For example, the technique disclosed in Japanese Patent Publication No. 1-59498 is known. This push button type ignition device pushes the spindle by a push button operation to open the gas supply valve, and uses a member that moves in the pushing direction to operate a switch for igniter operation (hereinafter referred to as an ignition switch). It is known that the contact operation can be performed after the opening.

[0003]

In the conventional push-button ignition device, the ignition switch is operated by contact with a member that moves in the pushing direction of the push button. Therefore, when considering only the forward / backward movement in the pressing direction, in the symmetrical heart-shaped guide groove, the engaging pin may reciprocate in the same path in the first pressing operation and the second pressing operation. Because
If the ignition switch is operated by the first pressing operation, the ignition switch is also operated by the second pressing operation. Therefore, the guide groove is made asymmetrical with respect to the pressing direction, and the ignition switch is operated by the stroke of the difference. It is devised to let you. Therefore, since the stroke for operating the ignition switch is extremely short, there is a problem that malfunction may easily occur even if there is a slight manufacturing error. A technique for electrically controlling the ignition timing and the like is also known, but this has a disadvantage that the circuit configuration becomes complicated and the cost increases.

[0004]

SUMMARY OF THE INVENTION Therefore, the applicant of the present invention has found that the engaging pin of the push-push mechanism moves not only in the pressing direction of the push button but also in the direction orthogonal to the pressing direction.
Paying attention to the fact that the push switch mechanism and the second push operation can be distributed to the left and right, the push-push mechanism is effectively used to operate the ignition switch in a reliable and timely manner. However, the ignition switch is provided so as to be able to be contact-operated at the side position reached by the first pressing operation.

[0005]

According to the push-button ignition device of the present invention, the stroke for activating the ignition switch can be made large and can be freely selected. Therefore, the operation of the ignition switch can be configured to precede the pressing operation of the spindle. As a result, in the first pressing operation, the engagement pin first swings to one side to activate the ignition switch, and then the spindle is pressed when the push button is pushed to a certain depth, and the gas supply valve is opened. To be done.
When the first pressing operation is released, the engagement pin swings toward the center and the contact with the ignition switch is cut off.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows the overall structure of a push-button ignition device. A spindle 2 is movably inserted inside a main body sleeve 1, and a return spring 3 is used to move forward (to the left in the figure).
Is urged to. 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 pilot discharge port 6 of the main body sleeve 1 are provided on the spindle 2. The main discharge port 4 and the pilot discharge port 6 are connected to a main nozzle and a pilot nozzle (not shown) of the combustion section, respectively. 9 is O for gas seal
The ring and 8 are O-ring retainers.

A solenoid 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 supply valve for opening and closing a gas passage 13 connected to the main discharge port 4 and the pilot discharge port 6 is attached to the solenoid 12. A safety valve 14 is provided. A casing 15 is attached to the front portion of the main body sleeve 1, an interlocking body 16 is accommodated therein through a spring 17, and a closed circuit-shaped guide groove 18 is formed on the outer surface. And the interlocking body 1
6 is retracted by the push button 20 via the ignition lever 19,
At the time of immersion, the spindle 2 is pushed rearward, and the push button 20
The safety valve 14 is opened after the small-diameter valve portion 7 and the main valve 5 are opened near the end position of the.

At the position corresponding to the guide groove 18, the casing 15 supports a base end bent portion of an engaging pin 21 having a tip bent portion as an engaging portion, and an igniter (not shown) in a combustion portion. Ignition switch 22 electrically connected to
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. As a result, the push button 20
By repeating the operation from the starting end position to the terminating position twice, the engaging pin 21 whose engaging portion at the leading end is engaged with the guide groove 18 intermittently moves, and the push-push mechanism 25 that goes around the guide groove 18 is formed. Guide groove 1 that is configured and will be described later
The ignition switch 22 is contact-operated by an engagement pin 21 that swings left and right according to the shape of 8.
Although the engagement pin 21 of the embodiment is formed by bending, it is also possible to form only the tip end portion by another member.

2 and 3 show the shape of the guide groove 18 in detail. The guide groove 18 is formed in a substantially heart shape as a whole, and corresponds to a point a corresponding to the start end position of the push button 20 to an end position. A first cam groove 18a extending to a point b,
A second cam groove 18b extending from the point to the point c corresponding to the intermediate locking position of the push button 20, a third cam groove 18c extending from the point c to the point d corresponding to the unlocking position of the push button 20, and the point d The fourth cam groove 18d extending to the point a is continuously provided. A locking step portion 26 that prevents the engaging pin 21 from returning is provided at the connection portion of each of the cam grooves 18a to 18d. Therefore, by using the push-push mechanism 25 of this embodiment, the engagement pin 21 swings to the ignition switch 22 side according to the shape of the first cam groove 18a before the spindle 2 opens the safety valve 14, and the ignition thereof is performed. The switch 22 is activated.

Next, the operation of the push-button ignition device configured as described above will be described mainly with reference to FIGS. 4 and 5. FIG.
And FIG. 4 (A) shows the extinguishing state of the ignition device,
The push button 20 is at the starting end position, the interlocking body 16 is projected forward, the engaging portion of the engaging pin 21 (hereinafter referred to as the engaging pin 21) is located at the starting end (point a) of the guide groove 18, and Due to this, the ignition switch 22 is kept in the OFF state. In this state, when the push button 20 is pressed from the start end position to the end position side, the interlocking body 16 is retracted against the spring 17,
During this immersion, as shown in FIG. 4B, the engagement pin 21 is moved according to the shape of the first cam groove 18a, the engagement pin 21 swings, and the ignition switch 22 is turned off.
N (point e in FIG. 5), the igniter in the combustion section starts operating. When the interlocking body 16 is further retracted, the spindle 2 is pushed backward against the return spring 3, and the small diameter valve portion 7, the main valve 5 and the safety valve 13 are sequentially opened, whereby the raw gas is discharged. It is supplied to the combustion section through the outlet 4 and the pilot discharge port 6 (point f of the guide groove), and the pilot nozzle is ignited. After that, the engagement pin 21 moves the first cam groove 18
When the end of a is reached (point b), the push button 20 cannot be operated further than that.

When the hand is released from the push button 20 at this end position, the return spring 3 causes the spindle 2 and the interlocking body 16 to return, so that the engaging pin 21 moves to the second position as shown in FIG. 4C. The ignition switch 22 is guided by the cam groove 18b.
After the ignition switch 22 is turned off,
The engaging pin 21 is locked at the point c by the urging force of the spring 17, and the push button 20 is held at the intermediate locking position here. When extinguishing the fire, when the push button 20 in the intermediate locking position is pressed, as shown in FIG.
8c, it is tilted in a direction further away from the ignition switch 22 to reach the point d, and after the push button 20 is unlocked, the interlocking body 16 is projected by the biasing force of the spring 17 and engaged. The pin 21 is guided by the fourth cam groove 18d
Returning to the point, this keeps the ignition device in the extinguished state shown in FIG.

As described above, according to the push-button ignition device of the present embodiment, in the process of operating the push button 20 from the start end position to the end position, first, the ignition switch 22 is contact-operated by the engagement pin 21, and thereafter, the ignition switch 22 is operated. Safety valve 14 by spindle 2
Is released. For this reason, the ignition switch 22 becomes O
Since it comes out after N, the explosion sound at the time of ignition is completely prevented. Further, since the ignition timing is mechanically controlled by the push-push mechanism 25, the entire ignition device can be configured more simply and inexpensively as compared with the case of electrical control.

Although the safety valve functions as a gas supply valve in the above embodiment, the structure of the gas supply valve is not limited to this, and the present invention is applied to an ignition device that does not have a safety valve. Good. Further, the operating position of the ignition switch 22 and the valve opening position of the spindle 2 are preferably points e and f in FIG. 5, but are not limited thereto, and they can be changed to appropriate positions on the first cam groove 18a. . Other,
The present invention can be implemented by arbitrarily changing the shape and configuration of each part without departing from the spirit of the present invention.

[0014]

As described in detail above, according to the present invention, the ignition switch is actuated by utilizing the movement of the engaging pin in the push-push mechanism in the direction orthogonal to the pressing direction. A reliable operation is promised without requiring high precision. Further, if the ignition switch is operated by swinging the engagement pin before the spindle reaches the valve opening position, an excellent effect of preventing explosion sound at the time of ignition is exhibited.

[Brief description of drawings]

FIG. 1 is a sectional view of a push-button ignition device according to an embodiment of the present invention.

FIG. 2 is a plan view showing a push-push mechanism of the push-button ignition device of FIG.

FIG. 3 is a development view showing a cross-sectional shape of a guide groove of the push-push mechanism of FIG.

FIG. 4 is an explanatory view showing the operation of the push-push mechanism of FIG.

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

[Explanation of symbols]

1 ・ ・ Main body sleeve, 2 ・ ・ Spindle, 3 ・ ・ Return spring, 4 ・ ・ Main discharge port, 5 ・ ・ Main valve, 6 ・ ・ Pilot discharge port, 7 ・ ・ Small diameter valve part, 8 ・ ・ Pilot guide, 9 ・ 11 ・ ・ O ring, 10 ・ ・ End plate, 12 ・ ・ Solenoid, 13 ・ ・ Gas passage, 14 ・ ・ Safety valve, 15 ・
・ Casing, 16 ・ ・ Interlocking body, 17 ・ ・ Spring, 18 ・
・ Guide groove, 18a to 18d ・ ・ Cam groove, 19 ・ ・ Ignition lever, 20 ・ ・ Push button, 21 ・ ・ Engage pin, 22 ・ ・ Ignition switch, 23 ・ ・ Presser spring, 24 ・ ・ Long hole, 25 ・
-Push-push mechanism, 26-.

Claims (1)

[Claims] 1. A push-push mechanism for making a round in the heart-shaped stepped guide groove by moving the engagement pin engaged with the closed-circuit-shaped stepped guide groove by repeating the pressing operation, and a push button. A push-button ignition device equipped with a spindle that opens the gas supply valve when the push-in operation is performed at a constant depth, the lateral position of which the engaging pin swings in the direction orthogonal to the pushing direction as the guide groove moves. A push-button ignition device comprising a switch for operating an igniter, the switch being provided so as to be capable of contacting the engagement pin.