JPS6343791Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a timer switch used in gas appliances, which opens the solenoid valve 4 to ignite gas, and after a preset time has elapsed, closes the solenoid valve 4 under timer control. In the timer _switch which controls extinguishing _of gas using
The 3rd contact is connected to the NC and connected to the appliance stopper, and is injected into the normally closed contact NC side when the appliance stopper is closed.
Switch SW ₃ 's normally closed contact NC to the first switch
Connect to the common contact COM of SW ₁ , and connect the third switch
Connect the common contact COM of SW ₃ to the normally closed contact NC of the fifth switch SW ₅ linked with timer 1, and
Connect the common contact COM of switch SW ₅ to capacitor C
to the common contact COM of the second switch SW ₂ , and connect the normally closed contact NC of the first switch SW ₁ and the normally open contact NO of the second switch SW ₂ , as well as the first switch SW _1. Connect the normally open contact NO of the second switch SW ₂ with the normally closed contact NC of the second switch SW 2, and the thermocouple type thermocouple 3 that detects the flame of the gas burner and generates thermoelectromotive force. The coil 5 of the solenoid valve 4, which opens the solenoid valve 4 with a current in the direction and closes the solenoid valve 4 with a current in the opposite direction, is connected in parallel, and the normally open contact NO of the third switch SW ₃ and the coil 5 are connected in parallel. 5 and the other end of the coil 5 is connected to the connection point between the common contact COM of the second switch SW ₂ and the capacitor C, and the normally closed contact of the fourth switch SW ₄ linked to the timer 1. NC is the normally closed contact of the third switch SW ₃
NC and connect the normally open contact NO of the fourth switch SW ₄ to the normally open contact NO of the third switch SW ₃ .
and the common contact COM of the fourth switch SW ₄
Connect to the normally open contact NO of the fifth switch SW ₅ ,
1st, 2nd, 3rd, 5th from DC power supply E during normal operation
The capacitor C is charged through the switches SW ₁ , SW ₂ , SW ₃ and SW ₅ , and the discharge current of the capacitor C is transferred to the third and fifth switches when the gas burner is ignited.
The coil 5 of the solenoid valve 4 is energized via SW ₃ and SW ₅ to open the solenoid valve 4, and after a predetermined time has elapsed, the first and second switches SW ₁ ,
SW ₂ is driven to the normally open contact NO side, and after a predetermined period of time, the fifth switch SW ₅ is set to the normally open contact.
Drive it to the NO side, and after a predetermined period of time, the fourth
Drive switch SW ₄ to the normally open contact NO side,
Furthermore, after a predetermined period of time has elapsed, the first and second switches are switched on.
Drive SW ₁ and SW ₂ back to the normally open contact NC side,
This timer switch is characterized in that it is provided with a timer 1 that drives the fourth and fifth switches SW ₄ and SW ₅ to return to the normally closed contact NC side after the set time of the timer 1 has elapsed.

Conventionally, in the case of gas appliances such as gas ovens, even if a timer for setting the cooking time was attached to the gas appliance, the timer merely notified the elapse of the set time and did not extinguish the combustion of gas. In most cases, food was spoiled because the fire was not extinguished. Figure ₆ shows a conventional specific circuit diagram of an automatic fire extinguishing system that automatically extinguishes gas after the time set on the timer has elapsed.
The capacitor C ₁ is connected to the coil 5 of the solenoid valve ₄ via the normally open contact of the switch _{S 1 which} is connected to the appliance stopper. . A thermocouple 3 is connected in parallel with this coil 5. In addition, a capacitor C _{2 is connected to another battery B 2, which} is different from the battery B 1, through the normally closed contact of the timer contact S ₂ , and this capacitor C ₂ is connected to the electromagnetic capacitor C ₂ through the normally open contact of the timer contact S ₂ . It is connected to the coil 5 of the valve 4. In this conventional method, the capacitor C ₁ is charged by the battery B ₁ via the switch S ₁ , and when the appliance stopper is turned at the time of ignition, the switch S ₁ is connected to the normally open contact side, and the capacitor C ₁ is charged. Coil 5 of solenoid valve 4 due to electric charge
Energize and open the valve. When the gas is ignited, the electromotive force from the thermocouple 3 keeps the coil 5 in an excited state, keeping the valve open.

Here, when the timer is activated and a predetermined period of time has elapsed, the timer contact _S2 is switched to the normally open contact side. Therefore, the current due to the electric charge of the capacitor C _{2 charged by the battery B 2 flows} through the coil 5 of the solenoid valve 4 in the opposite direction to the current from the thermocouple 3, canceling out the current flowing through the coil 5 and causing the solenoid valve to close. Valve 4 is closed to extinguish the gas.
In the conventional example shown in Fig. 6, two batteries B ₁ and B ₂ for ignition and extinguishing, and two capacitors C ₁ and C ₂ are required for gas ignition and automatic extinguishing using a timer. It's coming. Since these capacitors C ₁ and C ₂ have large capacitances, they are also expensive. In this way, two batteries B ₁ and B ₂ and two capacitors C ₁ and C ₂ must be used,
In the end, there was a problem of high costs.

The present invention has been proposed in view of the above points, and has an automatic extinguishing function by opening the solenoid valve at the same time as ignition, and adding switches and a timer, and is also cost effective. This provides a timer switch that is intended to be inexpensive.

Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 shows a specific circuit diagram of the present invention. In the diagram
SW ₁ is the first switch, and this first switch
SW ₁ operates in conjunction with the second switch SW ₂ ,
The first and second switches SW ₁ and SW ₂ are both linked to the timer 1 mechanism. This first switch
Connect the normally closed contact NC of SW ₁ to the positive pole side of the DC power supply E, connect the normally closed contact NC of the second switch SW ₂ to the negative pole side of the DC power supply E, and connect the normally open contact NC of the first switch SW ₁ to the negative pole side of the DC power supply E. and the normally closed contact NC of the second switch SW ₂ are connected, and the normally closed contact NC of the first switch SW ₁ and the normally open contact NO of the second switch SW ₂ are connected. SW ₃ is a third switch that is driven in conjunction with the appliance tap of the gas appliance, and the third switch SW ₃ is turned on to the normally closed contact NC side when the appliance tap is closed, and is normally open when the appliance tap is opened. It is applied to the NO side of the contact. SW ₅ is a fifth switch driven in conjunction with timer 1, and C is a capacitor charged with current from DC power source E. first switch
Connect the common contact COM of SW ₁ and the normally closed contact NC of the third switch SW ₃ , and connect the common contact COM of the third switch SW ₃ and the normally closed contact NC of the fifth switch SW ₅ .
and the common contact of the fifth switch SW ₅ .
COM to the second switch via capacitor C
Connected to common contact COM of SW ₂ . SW ₄ is a fourth switch that is driven continuously with timer 1. Reference numeral 4 denotes a solenoid valve that shuts off the gas supply by opening and closing the valve.The solenoid valve 4 collectively controls the main valves of gas appliances by opening and closing the valve. Depending on the direction of the flow in the coil 5, the solenoid valve 4 is opened or closed. That is, a thermocouple type thermocouple 3 that detects the flame of a gas burner and generates a thermoelectromotive force.
When a current in the forward direction from the thermocouple 3 causes the solenoid valve 4 to open, and when a current in the opposite direction to the current from the thermocouple 3 flows through the coil 5, the solenoid valve 4 closes. and the normally open contact of the third switch SW ₃
Connect NO to one end of the coil 5 of the solenoid valve 4, and connect the other end of the coil 5 to the common contact of the second switch SW _2.
Connected to COM. Also the fourth switch SW ₄
Normally open contact NO of the third switch SW ₃ normally open contact
Connect to NO and the normally closed contact of the fourth switch SW ₄
Connect NC to the normally closed contact NC of the third switch SW ₃ , and connect the common contact COM of the fourth switch SW ₄ to the fifth
It is connected to the normally open contact NO of the switch.

2 to 5 show the mechanism of a timer switch, in which a timer mounting plate 6 and a timer 1 are attached to a main body 7 of a gas appliance. This timer 1 is a rotary mechanical timer 1, with a spindle 9 protruding from the center of the timer 1, and the tip of the spindle 9 protruding from an insertion hole 12 of an instrument main body 7 to attach an operating knob. A cam 10 is attached to the spindle 9, and the spindle 9 is inserted between the cam 10 and the inner surface of the instrument body 7, so that the spring 8 is biased. The rotating operation of the cam 10 drives the switch group, and the outer peripheral surface of the cam 10 has four protrusions 10 ₁ , 1
0 ₂ , 10 ₅ , _{10 4} are made to protrude, and the first, second, fifth, fourth,
Switches SW ₁ , SW ₂ , SW ₅ , and SW ₄ are attached to the timer mounting plate 6. Above switch group SW ₁ ...
In order to have a time difference in the operation of the cam 10, _each projection 10 ₁ ... of the cam 10 has a different angle.
It forms... That is, FIG. 5b shows a side view of the cam 10, in which the protrusions 10 ₁ are inclined as shown, and there is an angle θ difference of 2.5° between each protrusion 10 ₁ . . However, since the first and second switches SW ₁ and SW 2 are linked, the first and second switches SW 1 _and SW 2 are linked.
Protrusions 10 ₁ corresponding to the second switches SW ₁ and SW ₂ ,
10 ₂ are formed at the same angle. That is, when the cam 10 is rotated and operated together with the timer 1, the protrusions 10 ₁ and 10 ₂ first drive the first and second switches S ₁ and SW ₂ , and then the protrusion 10 ₅ drives the fifth switch SW ₅ . , and then the fourth switch SW ₄ is driven by the protrusion 10 ₄ . Then, the push button 14 of each switch SW ₁ . . . is released by the stepped portion 13 of each protrusion 10 _{1 .} . . , and each switch SW ₁ . Note that each switch S _{1 .} . . is a micro switch, for example. 11 is a guide pin fixed to the spindle 9. Further, a pair of spiral surfaces 15 are formed on the side surface of the cam 10 corresponding to the guide pin 11, as shown in FIGS. 5a and 5b.
has two spiral surfaces that are point symmetrical with respect to the axis of the cam 10, and the inclination of the two surfaces is a spiral shape.
It remains constant with respect to the rotation angle. In addition, a scale plate 16 as shown in Fig. 2 is arranged at the operation knob of the timer 1, so that continuous use and timer use can be performed. This is the setting of timer 1, and counterclockwise rotation is the operation of timer 1. Note that a to e in the figure are shown for convenience when establishing the operation of the timer 1, and the actual scale plate 16 is provided with clock scales, and a to e in the figure are shown for convenience.
The angle corresponding to is actually a very small angle.

Next, the mechanical operation of the timer switch will be explained. When setting timer 1, rotate spindle 9 clockwise and each switch SW ₁ ...
The push button 14 of the cam 10 is the protrusion 10 ₁ of the stepped portion 1 of...
3, the cam 10 stops rotating. Then, when spindle 9 is further turned clockwise, spindle 9
A guide pin 11 fixed to the cam 10 climbs the helical surface 15 of the cam 10, and the cam 10 pushes the spring 8 and moves forward. When the cam 10 moves forward to a certain extent, the cam 10 presses the push button 1 of each switch SW ₁ ...
4 and rotates clockwise together with the spindle 9. Furthermore, rotate the cam 10 clockwise to
Protrusion 10 ₁ ...Turn it until it passes push button 14. From there, turn it clockwise or counterclockwise until you can set the time. This sets the time for timer 1. Next, to explain the operation of the timer 1, the spindle 9 rotates counterclockwise from the set time, and when the guide pin 11 reaches the bottom of the spiral surface 15, the cam 10 is also rotated by the contact surface 17 of the cam 10. It rotates together with the spindle 9, and first the first and second switches SW ₁ and SW ₂ are driven, and then the fifth switch is driven.
SW ₅ is activated, and then the fourth switch SW ₄ is activated. At this time, the operation knob is at the time 0 minute position on the scale plate 16, and extinguishes the gas burner and provides notification. Then, the cam 10 further rotates counterclockwise, and the push buttons 14 of the switches SW ₁ . . . are disengaged from the protrusions 10 ₁ .

Next, the operation will be explained based on FIG. First, a normal state in which timer control is not performed, that is, a continuous state in accordance with FIG. 2 will be described. Set the operating knob to the "continuous" position on the scale plate 16. When the appliance tap is closed, the third switch SW ₃ is not driven, so it is on the normally closed contact NC side, and the other switches SW ₁ , SW ₂ , SW ₄ , and SW ₅ are also on the normally closed contact NC side. . In this state, as shown in Figure 1a, a current I ₁ is generated by the DC power source E.
flows and charges capacitor C. When the appliance stopper is turned to ignite the gas burner, the third switch SW ₃ , which is linked to the appliance stopper, becomes the normally open contact NO side.
As shown in FIG. 1b, the electric charge stored in the capacitor C causes a current _I1 to flow through the coil 5 of the solenoid valve 4, thereby opening the solenoid valve 4 and igniting the gas burner. The thermocouple 3 is sensitive to the combustion of the gas burner, and current flows through the coil 5 in the direction that opens the solenoid valve 4. Even when the charge in the capacitor C is completely discharged, the current from the thermocouple 3 flows through the solenoid valve 4. Keep the gas burner combustion by keeping the valve open. After the specified time of use, when the appliance stopper is turned to close, the third switch SW ₃ becomes a normally closed contact NC.
In addition, the supply of gas is stopped and no current flows from the thermocouple 3, so no current flows to the coil 5, and the solenoid valve 4 is closed. This is the state of continuous use.

Next, the case of timer control will be described.
Set the operation knob to "O" point on the scale plate 16,
As above, turn the valve to ignite the gas and keep the gas burner burning. The state up to this point is the same as above, except that the position of the control knob is different. Next, set timer 1 by turning the control knob to a desired time above "point e" on scale plate 16. When the set time has elapsed, the gas burner will automatically be extinguished as follows. Note that "point O", "point a" ... "point e" in Figure 2 are
For the sake of convenience, "point e" indicates the rotational relationship between the timer 1 and the operating knob. When the timer 1 passes "point d" near the set time, the first and second switches _SW1 and _SW2 are driven by the cams ₁₀₁ and ₁₀₂ , and both are connected to the normally open contact NO. At this time, the solenoid valve 4 is held open by the current from the thermocouple 3. Then, when the timer 1 reaches "point c" a few seconds later from "point d", the fifth switch _SW5 is driven by the cam ₁₀₅ , and the normally open contact NO is connected.
The solenoid valve 4 is connected to the ignition side, and a current _I3 flows as shown in Fig. 1c. In other words, the capacitor C is charged by the DC power source E through the fifth and fourth switches _SW5 and _SW4 in the opposite direction to that during ignition.
The valve is kept open by the current from the thermocouple 3.

When the position of the timer 1 reaches the "b point" several seconds after this "c point", the fourth switch SW ₄ is driven by the cam ₁₀₄ and connected to the NO side of the normally open contact. Then, _{the charge in the capacitor C is discharged in the opposite direction to the current flowing through the thermocouple 3, and a current I 4 as} shown in FIG. Close the valve and stop combustion of the gas burner. Furthermore, after a few seconds have passed, when the timer 1 position reaches "point a",
The first and second switches SW ₁ and SW ₂ return to the normally closed contact NC side. At this time, the charge in the capacitor C is completely discharged, and the solenoid valve 4 is kept closed. Furthermore, when the position of the timer 1 reaches the "O point" after several seconds have passed from the "A point", the fourth and fifth switches SW ₄ and SW ₅ are restored and connected to the normally closed contact NC side, respectively. . At this time, since the appliance stopper is in the open state, the third switch SW ₃
is connected to the normally open contact NO side, but here,
By closing the instrument stopper, the third
Switch SW ₃ is connected to the normally closed contact NC side, returning to the initial state. This series of operations is an automatic extinguishing operation in which the gas burner is ignited, the timer 1 is set, the timer 1 is operated to extinguish the fire after the set time has elapsed, and the solenoid valve 4 is further driven to close.

As mentioned above, the present invention has a third
1st, 2nd,
The fourth and fifth switches are configured as described above,
In the initial state, the capacitor is charged, and the discharge current of this capacitor is used to open the solenoid valve at the time of ignition, and after setting the timer, the first, second, fourth, and fifth switches are activated after a predetermined period of time has elapsed. to charge the capacitor in the opposite direction, and after a predetermined period of time has elapsed, the fourth switch is actuated to cause current to flow in the reverse direction through the coil of the solenoid valve using the charge in the capacitor, closing the solenoid valve, and then for a further predetermined period of time. After the timer has elapsed, the first and second switches are activated, and after the timer set time has elapsed, the fourth and fifth switches are activated to return to the initial state. It is possible to easily provide an automatic extinguishing function with just one button, so the food will not be damaged even after the timer set time has elapsed.Moreover, this invention uses only one power supply and one capacitor. This makes it possible to keep costs lower than the conventional method of automatically extinguishing fires using two expensive capacitors and two batteries. It has the advantage of being able to supply products at a lower cost compared to other products.

[Brief explanation of drawings]

FIGS. 1a to 1d are explanatory diagrams of the operation of the embodiment of the present invention,
Figure 2 is an explanatory diagram of the scale plate of the same timer as above, Figure 3
The figure is a sectional view of the timer switch same as above, Figure 4 is a side view of the timer switch same as above, and Figures 5a and b
are a cross-sectional view and a side view of the same cam as above, and FIG. 6 is a specific circuit diagram of a conventional example, where 1 is a timer, 3 is a thermocouple, 4 is a solenoid valve, 5 is a coil, and SW ₁ is the first
switch, SW ₂ is the second switch, SW ₃ is the third switch.
switch, SW ₄ is the fourth switch, SW ₅ is the fifth switch.
switch, NC is a normally closed contact, NO is a normally open contact,
COM is a common contact, C is a capacitor, and E is a DC power supply.

Claims (1)

[Scope of utility model registration request] A timer switch is configured to open a solenoid valve to ignite gas, and after a preset time elapses, close the solenoid valve under timer control to extinguish the gas. A normally closed contact of a third switch that is connected to the normally closed contacts of the first and second switches that are linked to the timer, and is connected to the normally closed contact side of the third switch in conjunction with the appliance stopper and is turned on to the normally closed contact side when the appliance stopper is closed. is connected to the common contact of the first switch, the common contact of the third switch is connected to the normally closed contact of a fifth switch linked with a timer, and the common contact of the fifth switch is connected to the second switch via a capacitor. connect the common contact of the switch, connect the normally closed contact of the first switch and the normally open contact of the second switch, and connect the normally open contact of the first switch and the normally closed contact of the second switch. There is a thermocouple-type thermocouple that detects the flame of the gas burner and generates a thermoelectromotive force, and a solenoid that uses a forward current from the thermocouple to open the solenoid valve and a reverse current to close the solenoid valve. the coil of the valve is connected in parallel, the normally open contact of the third switch is connected to one end of the coil, and the other end of the coil is connected to the connection point between the common contact of the second switch and the capacitor; The normally closed contact of the fourth switch linked to the timer is connected to the normally closed contact of the third switch, and the normally open contact of the fourth switch is connected to the normally open contact of the third switch. The common contact of the switch is connected to the normally open contact of the fifth switch, and the capacitor is charged from the DC power supply through the first, second, third, and fifth switches during normal operation, and the discharge current of the capacitor is increased when the gas burner is ignited. 3rd, 5th
The coil of the solenoid valve is energized through the switch to open the solenoid valve, and after a predetermined time has elapsed, the first and second switches are respectively driven to the normally open contact side, and then a predetermined time has elapsed. Later, the fifth switch is driven to the normally open contact side, and after a predetermined period of time, the fourth switch is driven to the normally open contact side, and further after a predetermined period of time, the first and second switches are driven to the normally closed contact side. A timer switch characterized in that it is provided with a timer that causes the fourth and fifth switches to return to the normally closed contact side after the set time of the timer has elapsed.