JPH0614757U - Push button ignition device - Google Patents

Abstract

(57) [Abstract] [Purpose] In a push-button ignition device equipped with a push-push mechanism, the push-push mechanism is used to reliably operate the ignition switch, and in addition, the ignition switch is operated to open the gas supply valve. Precede. [Structure] Ignition lever 19 and interlocking body 1 by push button 20
The spintor 2 for opening the gas supply valve is pushed via 6. With the movement of the spindle 2, the main valve 5 and the small diameter valve portion 7 are opened, and then the safety valve 14 is opened, so that raw gas is supplied from the main discharge port 4 and the pilot discharge port 6 to the combustion section. A heart-shaped guide groove 18 is formed in the interlocking body 16, and the casing 15 has an engagement pin 21 having a tip end as an engagement portion 21a and an ignition switch 22 that is pressed to one side of the engagement pin 21. To provide. In the process of operating the push button 20 from the start end position to the end position, first, the engagement pin 21 swings according to the shape of the guide groove 18 to operate the ignition switch 22, and then the spindle 2 opens the safety valve 14.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 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 in particular, a heart-shaped stepped guide in a closed circuit shape by repeating a push operation (push push operation). An engaging pin engaged in a groove (hereinafter simply referred to as a guide groove) moves to use a push-push mechanism that goes around the heart-shaped stepped guide groove, enabling ignition and extinguishing with one push button. The present invention relates to a push button ignition device.

[0002]

[Prior art]

 Conventionally, as a push-button ignition device of this type, for example, a technique disclosed in Japanese Patent Publication No. 1-59498 is known. This push-button ignition device pushes the spindle by pressing the push-button to open the gas supply valve and uses a member that moves in the pushing direction to switch the igniter operation switch (hereinafter referred to as the ignition switch). It is known that the valve is provided so that it can be contacted after the valve is opened.

[0003]

[Problems to be solved by the device]

 In the conventional push button type 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 must reciprocate in the same path between the first pressing operation and the second pressing operation. Therefore, if the ignition switch is activated by the first pressing operation, the ignition switch is activated by the second pressing operation as well. It is designed to operate the ignition switch. Therefore, since the stroke for operating the ignition switch is extremely short, there was a problem that even a slight manufacturing error could easily cause malfunction. A technique for electrically controlling the ignition timing and the like is also known, but this has the drawback that the circuit configuration becomes complicated and the cost increases.

[0004]

[Means for Solving the Problems]

 Therefore, the applicant moved the engaging pin of the push-push mechanism not only in the pressing direction of the push button but also in the direction orthogonal to the pressing direction, and the first pressing operation and the second pressing operation of the push button were also performed. Focusing on the fact that it can be distributed to the left and right by using the push-push mechanism effectively, the ignition switch is operated reliably and in a timely manner. The configuration is that the engagement pin is reached by the first pressing operation. The ignition switch is installed in the side position to enable contact operation.

[0005]

[Action]

 According to the push-button ignition device of the present invention, the stroke for operating the ignition switch can be set large and can be freely selected, so that 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, first the engaging pin 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]

【Example】

 An embodiment embodying 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 is biased forward (to the left in the figure) by a return spring 3. 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. Reference numeral 9 is an O-ring for gas sealing, and 8 is an O-ring retainer.

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 passage 13 communicating with the main discharge port 4 and the 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 the front part of the main body sleeve 1, an interlocking body 16 is accommodated inside the casing 15 via a spring 17, and a guide groove 18 in the form of a closed circuit is formed on the outer surface. Then, the interlocking body 16 is retracted by the push button 20 via the ignition lever 19, the spindle 2 is pushed backward when the push button 20 is retracted, and the small-diameter valve portion 7 and the main valve 5 are opened near the end position of the push button 20. After that, the safety valve 14 is opened.

At the position corresponding to the guide groove 18, the casing 15 supports a base end bent portion of an engagement pin 21 having a tip bent portion as an engaging portion, and an igniter (not shown) of a combustion portion. An ignition switch 22 electrically connected to is disposed on one side of the engagement pin 21. The proximal bent portion of the engaging pin 21 is prevented from coming off by a pressing spring 23, and the engaging portion at the tip is inserted into the guide groove 18 through a long hole 24 of the casing 15. Accordingly, by repeatedly operating the push button 20 from the starting end position to the ending position twice, the engaging pin 21 whose engaging portion at the leading end is engaged with the guide groove 18 is intermittently moved, and the guide pin 18 is circulated once. The push-push mechanism 25 is configured so that the ignition switch 22 is contact-operated by the engagement pin 21 that swings left and right according to the shape of the guide groove 18 described later. Although the engaging pin 21 of the embodiment is formed by bending, it is also possible to form only the tip end 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 position of the push button 20 to an end position. Corresponding to the first cam groove 18a extending to the point b, the second cam groove 18b extending from the point b to the point c corresponding to the intermediate locking position of the push button 20, and the unlocking position of the push button 20 from the point c. A third cam groove 18c extending to the point d and a fourth cam groove 18d extending from the point d to the point a are continuously provided. A locking step portion 26 that prevents the engaging pin 21 from returning is provided at the connecting 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 toward 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. FIGS. 1 and 4 (A) show the extinguishing state of the ignition device. The push button 20 is at the starting end position, the interlocking body 16 is projected forward, and 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 accordingly 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, and during this recession, as shown in FIG. The engaging pin 21 is moved according to the shape of the first cam groove 18a, the engaging pin 21 swings, the ignition switch 22 is turned on (point e in FIG. 5), and the igniter in the combustion section is activated. start. When the interlocking body 16 is further retracted, the spindle 2 is pushed rearward 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 raw gas is removed. It is supplied to the combustion section via the IN discharge port 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 reaches the end of the first cam groove 18a (point b), and 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 is moved to the first position as shown in FIG. 4C. 2 The guide pin 2 is separated from the ignition switch 22 by being guided by the cam groove 18b, and 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, where the push button 20 is intermediately locked. Held in position. When extinguishing the fire, when the push button 20 in the intermediate locking position is pressed, as shown in FIG. 4D, the engaging pin 21 is guided to the third cam groove 18c and further separated from the ignition switch 22. When the push button 20 is unlocked, the interlocking body 16 is projected by the biasing force of the spring 17 and the engaging pin 21 is guided to the fourth cam groove 18d. After returning to point a, the ignition device is held in the extinguished state shown in FIG. 4 (A).

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 starting end position to the ending position, first, the ignition pin 22 is contact-operated by the engagement pin 21, and then the ignition switch 22 is operated. The safety valve 14 is opened by the spindle 2. Therefore, the raw gas comes out after the ignition switch 22 is turned on, so that 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 configuration 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. . In addition, 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]

[Effect of device]

 As described above in detail, according to the present invention, the ignition switch is operated by utilizing the movement of the engaging pin in the push-push mechanism in the direction orthogonal to the pressing direction, and thus high accuracy is required. The reliable operation is promised. Further, if the ignition switch is operated by swinging the engaging pin before the spindle reaches the valve opening position, it is possible to prevent an explosion sound at the time of ignition.

[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-18d ・ ・ Cam groove, 19 ・ ・ Ignition lever, 20 ・ ・ Push button, 21 ・ ・ Engage pin, 22 ・ ・ Ignition switch, 23
-Push-push mechanism, 26-.

Claims (1)

[Scope of utility model registration request] 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 with the engagement pin.