JP2956155B2 - Gas cookware and gas appliance safety devices - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas cooking appliance having a gas appliance plug and an ignition device and a safety device.

2. Description of the Related Art Conventionally, a gas cooking appliance having one operation button for igniting and extinguishing a button, and one control lever for heating power, when igniting at a position where the heating power is low, a high flow rate is supplied to the burner only while the operation button is pressed. Gas flows, and when you release your hand, the gas flow rate returns to weak. In addition, after the burner is ignited, the operating button must be kept pressed until the heating element is sufficiently warmed. In many cases, a safety device for stopping gas supply when a fire is inadvertently extinguished by a burner is provided at a location independent of an operation button.

Hereinafter, the conventional example as described above will be described with reference to FIG.

As shown in the figure, an operation button 2 having a fulcrum at its upper part is provided in a rectangular hole (not shown) provided in the operation unit 1.

In order to ignite the appliance, the operating button 2 is depressed, and the closing valve 3b, the safety valve 3c and the pilot valve 3d in the gas appliance plug 3 behind the operating button 2 are opened, so that the gas can be irrespective of the thermal power. Since the gas passes through the pilot passage 3e, the maximum amount of gas is supplied to the burner 8 via the nozzle 14. At the same time, when the operation button 2 is depressed in conjunction with the movement of the locking device 6, the ignition switch 7 is turned on and the high voltage generated by the igniter 12 causes the ignition plug 11 and the burner cap 9 to pass through. , An electric spark discharge is generated in the ignition section. The gas ignites the spark generated by the electric spark. Here, the heat element 10 is heated by the flame to generate a thermoelectromotive force, and the safety valve 3c is kept open. If you release your hand from operation button 2 here,
3e is closed, and at the same time, the ignition switch 7 is turned off and the spark stops. When the heat control lever 5 is moved left and right from this state, the amount of gas supplied to the burner cap 9 is adjusted by the needle 3g of the heat control unit. If the operation button 2 is pressed again, the gas appliance stopper 3 and the shutoff valve 3b are closed, and the gas is not supplied to the burner 8 and the fire is extinguished.
Further, when the safety device lever 13a is moved in the locking direction in this state, the projection 13b of the safety device lever 13a moves behind the projection 2b below the operation button 2, and the operation button 2 is fixed to the operation unit 1. As a result, the operation button 2 cannot be depressed, and the ignition operation becomes impossible. That is, this locking operation prevents a dangerous situation such as accidentally or unintentionally igniting the gas appliance and improves the safety of the gas appliance.

Problems to be Solved by the Invention However, in such a configuration, when the heating power adjustment lever 5 is ignited at a weak position, a strong flow of gas is supplied to the burner 8 when the operation button 2 is pressed, When the operation button 2 is released after ignition, the gas flow rate becomes weak. On the other hand, in actual cooking, the heating power is strong at the time of ignition, and the heating power is low at the end of cooking. In many cases, it is necessary to move the heating power control lever 5 to a strong position each time ignition is performed.

Further, at the time of ignition, the operation button 2 ignites the burner 8, the flame spreads over the entire burner, and the heat element 10 is connected to the safety valve.
It is necessary to keep pushing the electromotive force enough to adsorb 3c until it is generated.

Furthermore, when activating the safety device following the fire extinguishing operation,
Alternatively, when the safety device is released from the locked state to perform the ignition operation, it is necessary to operate the operation button 2 and the safety device lever 13a, so that the operability is not good. In addition, there is a problem that the number of safety device components increases.

In view of the above, the present invention relates to a configuration having an operation button for performing ignition and extinguishing with one button, and one heating power adjustment lever.
It is a first object of the present invention to provide a gas cooking appliance in which the heating power control lever always returns to the high heat power position by the ignition operation, regardless of the position of the heating power control lever.

A second object of the present invention is to provide an ignition device that can reliably ignite even if the user immediately releases his hand by only pushing the operation button once.

A third object of the present invention is to provide a gas appliance plug safety device which improves the operability of the safety device, has a small number of parts, and is excellent in assemblability.

Means for Solving the Problems In order to achieve the first object, the present invention provides a gas appliance having one operation button for performing ignition and extinguishing, one slide-type heating power control lever, and a gas closing function. A stopper, a locking device that opens and closes a gas passage of the gas appliance plug by igniting and extinguishing the operation button, and a heating power adjusting unit that regulates a gas passing amount by sliding the heating power adjusting lever. With one end in contact with the movable part of the locking device that moves in conjunction with the movement of the ignition operation around the fulcrum, the heat control lever is always moved to a position with high heat as the point of force and the opposite end as the point of action. A return lever is provided.

Further, in order to achieve the second object, the present invention provides a switch for judging an open / close state of a locking device for opening and closing a gas passage of a gas appliance plug, an igniter for generating an electric spark discharge in an ignition portion of a burner, A thermal element that generates a thermoelectromotive force at both ends thereof due to the flame of the burner, and a safety valve unit that holds the gas passage open by the electromotive force generated by the thermal element,
After the switch is turned on, a circuit for supplying a constant current to the safety valve unit and the igniter for an optimal constant time is provided.

In order to achieve the third object, the present invention provides a ring-shaped button guide fixed to an operation unit on the front of a gas appliance,
A cylindrical operation button that slides back and forth along the inner surface of the button guide to fire and extinguish with one button, and a convex leaf spring protruding from the outer surface of the operation button on a part of the outer wall of the operation button. The button guide has an inner surface provided with two first grooves in the sliding direction of the operation button on which the leaf spring slides, and an L-shaped second groove in the sliding direction and the circumferential direction provided on the inner surface of the button guide. The second fitting projection is provided on the side surface of the ignition / extinguishing button.

The gas cooking appliance of the present invention transmits the pressing force of the operation button to the heating power adjustment lever via the return lever at the time of the ignition operation, even if the heating power lever is at an arbitrary position, and the heating power to the strong position. Since it acts in the returning direction, the thermal power is always at a high position after ignition.

Also, at the time of the ignition operation, the ignition switch provided in the locking device is turned on at the same time when the operation button is pressed, and a constant current is supplied from the circuit unit to the igniter and the safety valve for a fixed time, so that the ignition operation is performed. The ignition operation is continued for a certain period of time even if the operation button is pressed once and the hand is released thereafter.

In addition, the safety device for the gas appliance plug is composed of two parts, the ignition and extinguishing button and the button guide. The operation button also functions as the ignition and extinguishing button and the lock lever, so the configuration is simple, the number of parts is small, and the fire is extinguished. , Lock, unlock, and ignition operations can be continued continuously, and operability is improved. In addition, the button guide and the operation button can be assembled as a unit on the operation surface, thereby improving the assemblability. .

Embodiment Hereinafter, a gas cooking appliance according to an embodiment of the present invention will be described with reference to the drawings. Note that the same reference numerals are used for the same parts as in the conventional example.

FIG. 1 is an exploded perspective view of a main part of the gas cooking appliance of the present invention. The operation button 2 slides back and forth along the inside of the button guide 19 fixed to the operation section 1. An instrument plug 3 fixed to a gas pipe 4 is located behind the operation button 2. The sliding operation before and after the operation button 2 is changed to an opening and closing operation of the gas passage of the gas appliance plug 3 by the locking device 6. The gas in the gas pipe 4 passes through the instrument plug 3 having an open gas passage, and is
After the flow rate is regulated at 14, it is supplied to the burner 8. On the other hand, the L-shaped projection 6b provided on the side surface of the locking device 6 moves in conjunction with the operation button 2, and during the ignition operation, the bearing portion 18
b is used as a fulcrum, and the lower end 18d of the return lever 18a is used as a point of force to push in backward.
8c moves in the direction of the operation button 2 as an action point, and moves the heating power adjustment lever 5 to the position of high heating power via the needle pin 3h.

At the same time, the L provided on the side surface of the locking device 6
The protrusion 6b of the mold presses the actuator of the ignition switch 7 to hold the terminal between the A terminal 7b and the B terminal 7c.
From 15, a constant current is applied to the terminal 3 j of the safety valve for a certain time to forcibly hold the safety valve. Meanwhile, printed circuit board 15
Therefore, a constant current flows through the ignition high-voltage coil 12 for a certain period of time, so that electric spark discharge is skipped between the ignition plug 11 and the ignition flame outlet of the burner cap 9, and the gas supplied to the burner 8 is ignited to generate a flame. , And extends over the entire circumference of the burner cap 9.
This flame heats the thermal element 10 and generates a thermoelectromotive force at both ends. By the electromotive force, the safety valve after the forced adsorption for a certain time is maintained in an open state. The power of the printed circuit board 15 is supplied by a battery 17 in a battery case 16 attached to the rear surface of the main body.

 Hereinafter, the operation will be described in detail.

FIG. 2 is a perspective view of the operation button 2, the button guide 19, and the gas appliance plug unit in a fire extinguishing state.

FIG. 3 is a sectional view of the gas appliance plug unit in the fire extinguishing state, in which the shutoff valve 3b and the safety valve 3c in the gas appliance plug 3 are closed. Also, the actuator 7e of the ignition switch 7
Is not pressed down, and the A terminal 7b and the B terminal 7c are not conducting.

FIG. 4 is a perspective view of the operation button 2, the button guide 19, and the gas appliance plug unit during the ignition operation.
Are pushed inside along the inner surface of the button guide 19. The L-shaped projection 6b provided on the side surface of the locking device 6 also moves rearward in conjunction with the movement of the operation button 2, and further pushes the lower end 18d of the return lever 18a rearward. Is rotated counterclockwise about the bearing 18b, and the tapered upper end 18 of the return lever 18
c moves the needle pin 3h forward and upward, which is the vertical direction of the taper. As a result, the thermal power control lever 5 is
It rotates clockwise around 5b and becomes a position with high thermal power. At the same time, in the ignition switch 7, the actuator 7e is pressed into the L-shaped projection 6b,
The terminal 7b and the B terminal 7c conduct.

FIG. 8 is a time chart showing the presence or absence of power supplied from the printed circuit board 15 having the timer circuit to the igniter 12 and the safety valve 3c after the conduction of the A terminal 7b and the B terminal 7c of the ignition switch. After the ignition switch 7 is turned on, a current is supplied to the igniter for 5 seconds, and an electric spark discharge is generated in the ignition plug 11 and the ignition flame port of the burner cap 9 for 5 seconds. On the other hand, the A terminal 7b of the ignition switch 7 is connected to the safety valve 3c.
The current required for holding the safety valve 3c by suction is supplied for 7 seconds after the conduction between the terminal B and the B terminal 7c. Further, since the safety valve 3c is opened by the ignition pushing operation, the safety valve 3c is reliably opened for 7 seconds. After 7 seconds, the safety valve 3c is kept open until the fire extinguishes due to the thermoelectromotive force of the thermal element 10.

FIG. 5 is a sectional view of the gas appliance plug unit during the ignition operation. The slide 6c and the shaft 3i also move rearward in conjunction with the movement of the operation button (not shown), so that the closing valve 3b opens. On the other hand, the safety valve 3c is also pushed and opened at the tip of the shaft 3i, so that the gas supplied from the gas pipe 4 flows through the gas passage 3f to the thermal power control section. On the other hand, the needle 3g of the thermal power control section allows the maximum gas amount to flow when the return lever 18a moves the thermal power to the strong position.

FIG. 6 is a perspective view of the combustion state of the operation button 2, the button guide 19 and the gas appliance plug unit. The L-shaped projection 6b provided on the side of the operation button 2 and the locking device 6 indicates the ignition position. Since it has returned to the intermediate position between the fire extinguishing positions, the L-shaped projection 6b does not contact the lower end 18d of the return lever 18a, while the tapered upper end 18c of the return lever 18a and the needle pin 3h do not contact each other. There is no contact even at such thermal power positions. In this state, the heating power can be adjusted by sliding the heating power adjusting lever 5 right and left.

FIG. 7 (a) is a cross-sectional view of the gas appliance plug unit in the above-described combustion state, and the needle 3g is at the position of the minimum heating power.

FIG. 7 (b) is a cross-sectional view of the gas appliance plug unit in the above-described combustion state, in which the needle 3g is located at the maximum heating power. When the operation button 2 is pressed again from this state and released, the fire extinguishing state shown in FIG. 4 is set.

In the above-described embodiment, once the operation button 2 is pressed once, even if the hand is immediately released, the heating power control lever 5 returns to the strong position, and an electric spark discharge occurs to the burner 8 for 5 seconds. Since the adsorption current is also applied to the safety valve 3c for 7 seconds, the ignition operation is excellent and the ignition is reliable. Further, the retraction mechanism of the heating power adjustment lever 5 has a small number of parts and is excellent in assemblability.

Next, the configuration of the safety device for the operation button 2 will be described.

FIG. 9 is a perspective view of the button guide 19 and the operation button 2. The operation button 2 has a rectangular projection 2b on a side surface thereof. Above the side surface of the button guide 19, an inverted L-shaped groove 19b is provided. Then, the protrusion 2b is fitted into the L-shaped groove 19b.

Next, referring to FIGS. 11 and 12, the operation button 2 and the button guide 19 at the time of ignition operation and at the time of locking for operating the safety device will be described.
Will be described. Fig. 11 shows the characters during normal ignition and fire extinguishing. Due to the normal movement of the operation button 2 in the front-rear direction, the protrusion 2b on the side surface of the operation button 2 becomes the operation button 2 of the inverted L-shaped groove 19b.
Move along the groove 19c parallel to the sliding direction of the slider. Arrow 20 indicates the movement of operation button 2 before and after. The arrow 21 indicates the case where the position of the operation button 2 with respect to the button guide 19 is in the ignition state. The arrow 22 is the operation button 2 for the button guide 19
Shows the case where the position is in the fire extinguishing state.

The movement of the lock is shown in FIG. When locking, turn the operation button 2 counterclockwise from the fire extinguishing state to protrude.
2b moves to the circumferential groove 19d of the inverted L-shaped groove 19b of the button guide 19. When the operation button 2 is pushed in to ignite in this state, the projection 2d hits the wall of the groove 19d of the button guide 19 and cannot be pushed. The arrow 23 indicates the movement of the operation button 2 with respect to the button guide 19 in the lock operation.

Next, the positioning spring unit of the safety device will be described. FIG. 13 is a perspective view of the button guide 19 and the operation button 2 as viewed from the rear side of the main body. On the side opposite to the square projection 2b of the operation button, a convex leaf spring 2c having a skirt extending to both sides is provided. Is inserted. On the inner surface of the button guide 19, there are a sliding groove 19f and a lock groove 19g which are parallel to the sliding direction of the operation button 2, and the leaf spring 2c
Is fitted with the sliding groove 19f.

FIG. 14 is a perspective view of a leaf spring fitting portion, a leaf spring 2c, and a coil spring 2d provided on a side surface of the operation button 2, and two vertical portions 2f of the leaf spring 2c.
Are fitted into two grooves 2g provided on the side surface of the operation button 2. The coil spring 2d is inserted between the leaf spring 2c and the projection 2g between the two grooves after the leaf spring 2c is assembled on the side of the operation button 2.

Fig. 15 shows the leaf spring 2c on the side of the operation button 2.
FIG. 9 is a perspective view showing a state in which a coil spring 2d is incorporated. The leaf spring 2c does not come off because there is a projection 2h provided on a side surface of the operation button 2.

FIG. 16 shows the operation button 2 incorporated in the button guide 19,
FIG. 3 is a perspective view from the rear side of the main body in a state where ignition is possible.

FIG. 17 shows the operation button 2 incorporated in the button guide 19,
By turning the operation button to the left (from the front), the leaf spring 2c rides over the side wall 19h between the sliding groove 19f and the lock groove 19g, and the leaf spring 2c
9g is a perspective view from the rear side of the main body in a state fitted with,
It does not easily return from the safe value operating state to the ignition enabled state.

FIG. 18 shows the operation button 2 incorporated in the button guide 19,
FIG. 4 is a cross-sectional view of a main part in a state where the safety device is operated and inserted into the circular hole provided in the operation unit 1 from the front of the instrument;
The claw 19i provided on the outer peripheral side surface of the button guide 19 is fixed to the operation unit 1 because it hooks on the bent portion 1b on the inner end surface of the circular hole of the operation unit 1.

In the above-described embodiment, since the operation button also functions as the operation button and the safety device, only one operation button is required for the operation, and the operability is improved. In addition, the number of parts is reduced by using the same function, and when the lock is applied, the operation button and button guide are unitized and cannot be released easily.
The assembly is possible only by inserting the unit from the front of the device, and the assemblability is improved.

Effects of the Invention As described above, the present invention has the following effects in the gas cooking appliance of claim 1. That is, regardless of the position of the thermal power control lever, if the operation button is pushed for ignition, the thermal power will always be at a strong position, so that the ignition performance is excellent. In particular, since the action point of the return lever abuts and moves the heat control lever, the heat control lever can be reliably returned to the strong heat position as compared with a case in which it is moved by the urging force of a spring, and the reliability is improved. In addition, the above-mentioned heating power adjustment lever can be operated with a light force because it moves using the leverage of the return lever, and it is maintained at the high heating power position after the ignition operation. It is often used at a low level and is easy to use.

In the gas cooking apparatus according to the second aspect of the present invention, the ignition operation is performed by pressing the operation button once, and then releasing the operation button for an appropriate time for the igniter and the safety valve.
Since an appropriate current is supplied and ignition is completed, operability is very excellent.

Further, in the safety device according to the third aspect of the present invention, the operability is excellent because the operation button and the safety device lever are also used. Also, the number of parts is small and the assemblability is excellent.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a main part of a gas cooking appliance according to one embodiment of the present invention, FIG. 2 is a perspective view showing a configuration of an operation button, a button guide, and a gas appliance plug unit in the fire extinguishing state.
FIG. 3 is a cross-sectional view of the gas appliance plug unit in a fire extinguishing state, and FIG. 4 is a perspective view showing a configuration of an operation button, a button guide, and a gas appliance plug unit in a state where an operation button is pushed in for ignition. FIG. 5 is a cross-sectional view of the gas appliance plug unit in a state where the operation button is pushed in for the same ignition, and FIG.
FIG. 7 is a perspective view showing the configuration of the operation button, button guide, and gas appliance plug unit in the same combustion state. FIG.
Fig. 8 (b) is a partial cross-sectional view of a gas appliance plug unit having a high combustion power in the same combustion state. FIG. 9 is a time chart showing the presence or absence of supplied power, FIG. 9 is a perspective view of the operation buttons and the button guide in the embodiment, FIG. 10 is a perspective view of the button guide in the embodiment in which the operation buttons are incorporated, FIG. 11 is a perspective view at the time of ignition and fire extinguishing when the operation button is incorporated in the button guide according to the embodiment, and FIG. 12 is a perspective view at the time of locking when the operation button is incorporated into the button guide according to the embodiment. FIG. 13 is a perspective view of the operation button and the button guide in the embodiment from the rear, FIG. 14 is an exploded perspective view of a part of the operation button, a leaf spring and a coil spring in the embodiment, and FIG. Is a perspective view in which a leaf spring and a coil spring are incorporated in the operation button in the embodiment, FIG. 16 is a perspective view from the rear in a state where the operation button is incorporated in the button guide in the embodiment, and FIG. 17 is the embodiment. FIG. 18 is a perspective view from the rear of a state in which an operation button is incorporated into the button guide and the safety device is operated, and FIG. 18 is a state in which the operation button is incorporated in the button guide in the embodiment and the safety device is operated, and Sectional view of relevant parts in a state where it is inserted from the front of the instrument into the provided circular hole, FIG.
FIG. 19 is a sectional view of a main part of a conventional gas cooking appliance. 1 ... operation unit, 2 ... operation buttons, 2 b ... projection, 3 ...
Gas appliance plug, 3c safety valve, 4 gas pipe, 5 thermal power control lever, 6 locking device, 7 ignition switch, 8
... burner, 9 ... burner cap, 10 ... thermal element, 11 ... spark plug, 12 ... igniter, 13a ... lock lever, 14 ... nozzle, 15 ... P plate, 16 ... battery case , 17 ... dry battery, 18a ... return lever, 19 ... button guide.

──────────────────────────────────────────────────の Continued on the front page (72) Inventor Hiroyuki Setoguchi 1006 Kadoma Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. (72) Inventor Yoshio Akamatsu 1006 Kadoma Kadoma, Osaka Pref. 1006 Matsushita Electric Industrial Co., Ltd. (72) Inventor: Yoshigo Wakashima 1006, Kazuma, Kadoma, Osaka Pref. Matsushita Electric Industrial Co., Ltd. (56) References JP-A-60-38525 (JP, A) JP-A 62-75353 (JP, U.S.A.) ) Shokai Sho 63-147605 (JP, U) Shokai Hei 2-58816 (JP, U) (58) Field surveyed (Int. Cl. ⁶ , DB name) F23N 5/26 F24C 3/12

Claims (3)

(57) [Claims] 1. An operation button for performing ignition and fire extinguishing, a slide-type heating power control lever, a gas appliance plug having a gas closing function, and a gas appliance plug which is ignited and extinguished by the operation button. A locking device for opening and closing the gas passage;
One end of the contact point between the heating power control unit that regulates the amount of gas passing through the sliding operation of the heat power control lever and the movable part of the locking means that moves in conjunction with the movement of the ignition operation around one fulcrum A gas cooker having a return lever whose opposite end serves as a point of action and always moves the heat control lever to the high heat position. 2. A switch for judging an open / close state of a locking device for opening / closing a gas passage of a gas appliance plug, an igniter for generating an electric spark discharge at an ignition portion of the burner, and heat generation at both ends by the burner flame. A heat element for generating electric power, a safety valve unit for holding a gas passage open by an electromotive force generated by the heat element, and a fixed time period optimal for each of the safety valve unit and the igniter after the switch is turned on.
The gas cooking appliance according to claim 1, further comprising a circuit for supplying a constant current. 3. A ring-shaped button guide fixed to an operation section on the front of the gas appliance, one cylindrical operation button which slides back and forth along an inner surface of the button guide to perform ignition and fire extinguishing, and said operation. A part of the outer peripheral wall of the button is provided with a convex leaf spring projecting from the outer peripheral surface of the operation button, and two first grooves in the sliding direction of the operation button on which the leaf spring slides are formed on the inner surface of the button guide. A gas appliance safety device comprising: an L-shaped groove in a sliding direction and a circumferential direction; and a projection on a side surface of the operation button, the projection being fitted to the L-shaped second groove.