JPH0561960B2 - - Google Patents

Description

[Detailed description of the invention]

(a) Field of Industrial Application The present invention relates to an electric iron that automatically cuts off power to the heating means when the iron is not used for a predetermined period of time. (b) Prior Art This type of electric iron, which automatically cuts off electricity to a heating means such as a heater when the iron is not used for a predetermined period of time, is known from, for example,
It has been well known in the past as shown in Japanese Patent Application Laid-open No. 25155 and Japanese Patent Application Laid-Open No. 155294/1983. However, conventional irons are configured to set the temperature by mechanically changing the amount of deviation of the bimetal using a dial, and also display the set temperature depending on the position of the dial. Even if the power to the heater is automatically cut off and the heater is turned off as shown above while ironing with the iron set to the "off" position, the dial position will not change and the iron will remain "off". It was not possible to notify users that the (C) Problems to be Solved by the Invention The present invention provides an electric iron that automatically shuts off electricity to a heating means such as a heater when the iron is not used for a predetermined period of time. An object of the present invention is to enable a user to be accurately notified that the system is automatically shut off. (d) Means for solving the problems The present invention provides a base, a heating means for heating the base, a temperature setting means for setting the temperature of the base, and a heating means for heating the base by the temperature setting means. a first notifying means for continuously notifying that an "off" mode is set to cut off power to the base; a temperature detecting means for detecting the temperature of the base; and a temperature setting means and a temperature detecting means. a control means for controlling the heating means based on an output; a sensor for detecting movement of the iron; a timer; and a control means when the iron is not in use for a predetermined period of time based on the outputs of the sensor and the timer. posture monitoring means for cutting off energization to the heating means via means, and the first notification when the energization to the heating means is cut off based on the output of the posture monitoring means and the heating means is in an "off" mode. The device is configured to include a second notification device that continuously provides notification different from the notification provided by the device to notify that the device is in the “off” mode. (E) Effect Since the present invention is configured as described above, when the temperature setting means is operated to set the "off" mode when ironing is finished, the power supply to the heating means is cut off via the control means. At the same time, the first notification means continuously reports that it is in the "off" mode. In addition, if the iron is left unattended during ironing, the posture monitoring means determines that the iron has been unused for a predetermined period of time based on the output of the sensor and timing means, and the iron is sent to the heating means via the control means. Power is automatically cut off. And the second
To accurately inform a user that the base is not being heated by continuously notifying that the notifying means is in the "off" mode. Here, the notification by the second notification means ("off" based on the user's neglect)
mode) was carried out in a different form from the notification by the first neglecting means (the "off" mode operated by the user), so the user did not know that the "off" mode was carried out based on the user's neglect. to prevent ironing from happening again. (f) Examples Examples of the present invention will be described based on the drawings. FIG. 1 is a partial sectional view of the electric iron of the present invention, in which 1 is a base, 2 is a heater (heating means) embedded in the base, 3 is a vaporization chamber formed in the base 1, and 4
5 is a negative characteristic thermistor closely fixed to the base 1 in the vicinity of the vaporization chamber; 5 is a steam hole provided on the bottom of the base 1 and communicates with the vaporization chamber 3; 6 is an iron cover provided above the base 1. in,
A cylindrical communication member 7 made of heat-resistant rubber and communicating with the vaporization chamber 3 is provided. Reference numeral 8 denotes a handle body fixed to the upper surface of the iron cover 6, which has a rod-shaped and hollow grip part 8A at the upper part, a guide part 8B at the lower part, and a grip part 8A at the rear part.
A support portion 8C is formed in which a guide portion 8B is connected to the support portion 8C. Reference numeral 9 denotes a mercury switch disposed within the grip portion 8A, which is fixed with the contact side slightly tilted upwards with respect to the hanging surface of the base 1, and when the iron is kept stationary in a horizontal state, the contact is opened; When the iron is moved (while ironing is being performed), the contacts are closed. Reference numeral 10 denotes a tank which is detachably housed between the iron cover 6 and the guide part 8B and stores water, and has a steam nozzle 11 communicating with the communication member 7 on the bottom surface. FIG. 2 is a perspective view of the grip portion 8A, 12A,
12B is UP for selecting the desired temperature of the base 1.
and DOWN switch, 13A, 13B, 13C,
13D is "high" which displays the desired temperature of base 1 selected by the UP or DOWN switch;
These are LEDs for indicating “Medium”, “Low”, and “Off” modes. FIG. 3 is a schematic electrical circuit diagram, in which 14 is an AC power supply, 15 is a DC power supply circuit, and 16 is an initial circuit, which outputs a positive pulse when the AC power supply 14 is turned on. 17 is a setting means for setting the desired temperature of the base 1;
Switches 12A, 12B and the UP switch are connected to the UP input terminal, and the DOWN switch 12B is connected to the DOWN input terminal.
UP/DOWN counter 17A connected to the input terminal
and a decoder 1 that decodes the output of the counter.
7B and the UP/DOWN counter 1 in synchronization with the rise of the output signal of the initial circuit 16.
The first one-shot circuit 17C provides a positive pulse to the R input terminal of the circuit 7A. The relationship between the output of the UP/DOWN counter 17A and the output of the decoder 17B is set as shown in Table 1. And UP/DOWN counter 17
A is No. 1 in the table when UP switch 12A is closed.
~ Change the output towards 4 and DOWN
When the switch 12B is closed, the output is changed toward No. 4 to No. 1 in the table, and when a positive pulse is applied to the R input terminal, the output is reset to No. 1 in the table. There is.

[Table] Reference numeral 18 denotes an attitude monitoring means for monitoring the attitude of the base 1, and a first comparison means for comparing the outputs of the first bridge circuit 18A, which has the mercury switch 9 as one side, and the connection points A and B of the bridge circuit. It is composed of a circuit 18B. The comparison circuit is a mercury switch 9
When the contact is closed, it outputs an "L" level signal, and when it is open, it outputs an "H" level signal. 19 is a first AND circuit that inputs the output of the first comparison circuit 18B and the output of the Q output terminal of a flip-flop 26D, which will be described later; 20 is a first clock means that inputs the output of the first AND circuit 19 to the S input terminal; Then, when the output of the first AND circuit 19 is inputted from the R input terminal via the inverter 21 and the first AND circuit 19 outputs an "H" level signal, the timing operation is started and the clock is counted for a predetermined period of time (3 minutes). After the lapse of time, an "H" level signal is output from the O output terminal, and when the first AND circuit 19 outputs an "L" level signal, it is reset. 22 is a second clock means, which outputs the output from the O output end of the first clock means 20 to S.
The output of the O output end of the first timer 20 is inputted from the input end and the R input end of the first timer 20 via the inverter 23, and when the first timer 20 outputs an "H" level signal, the timer starts the timer operation. specified time (1 minute)
After the elapse of time, an "H" level signal is output from the O output terminal, and when the first time measuring means 20 outputs an "L" level signal, it is reset. 24 is the initial circuit 16, UP and
DOWN switches 12A, 12B, a first OR circuit that inputs the output of the second timer 22, 25 is a control means, and a switching resistor R ₁ is connected to each of the O ₁ , O ₂ , O ₃ output terminals of the decoder 17B. , R ₂ , R ₃ and the thermistor 4 as one side, and a second comparison circuit 25B that compares the outputs of the connection points C and D of the bridge circuit.
and a second AND circuit 25C which inputs the output of the comparison circuit and the inverted output of the first clock means 20.
, a transistor 25D that is turned ON and OFF by the output of the AND circuit;
A relay coil 25 that opens and closes a normally open relay contact 25E connected in series to the heater 2 when turned off.
It is composed of F. The relationship between the resistance values of the switching resistances R ₁ , R ₂ , and R ₃ is as follows: switching resistance R ₁ < switching resistance R ₂ < switching resistance R ₃ , and the relationship with the set temperature is from the left to “high” (180°C). ”,
"Medium (140℃)" and "Low (100℃)". For example, when the _O1 output terminal of the decoder 17B is outputting an "H" level signal, the output voltage at the connection point C and the output voltage at the connection point D will be the same when the thermistor 4 detects 180°C. Similarly, at this time, the output of the second comparison circuit 25B changes from an "H" level signal to an "L" level signal. 26 is a temperature guarantee means, which is connected to the second comparison circuit 25;
A second one-shot circuit 2 that outputs positive pulses in synchronization with the rise and fall of the output signal of B.
6A, a third one-shot circuit 26B that outputs a positive pulse in synchronization with the rise of the output signal of the first OR circuit 24, and a delay circuit 26C that delays the output of the one-shot circuit by a small amount (about 0.1 seconds).
A flip-flop 2 receives the output of the second one-shot circuit 26A from the S input terminal, the output of the delay circuit 26C from the R input terminal, and supplies the output from the Q output terminal to one input terminal of the first AND circuit 19.
It consists of 6D. 27 is a notification means, which includes the display LED 13A,
13B, 13C, 13D and the decoder 17B
3rd to 5th AND circuits 27A, each of which inputs the outputs of the O ₁ to O ₃ output terminals in sequence from one input terminal, and inverts the output of the first clock means 20 and inputs it from the other input terminal; 27B, 27C and decoder 17
A second OR circuit 27D inputs the _O4 output terminal of B and the output of the first timer 20, and the output terminal is "H" for 0.5 seconds and "L"
The first oscillation circuit 2 oscillates at a timing of 0.5 seconds.
7E, a second oscillation circuit 27F that oscillates "H" at a timing of 0.2 seconds and "L" at a timing of 0.2 seconds, and the outputs of the first timer 20 and flip-flop 26D, the DC power supply circuit 15, the 1 oscillation circuit 2
7E and a switching circuit 27G that switches to the output of one of the second oscillation circuits 27F, and sixth to eighth AND circuits 27H that operate based on the outputs of the third to fifth AND circuits 27A to 27C and the switching circuit 27G. ，
27I, 27J, a ninth AND circuit 27K that operates based on the outputs of the second OR circuit 27D and the switching circuit 27G, and the sixth to ninth AND circuits 27H.
Based on the output of ~27K the LED13A~1
Inverter 27 for the driver that drives 3D
It consists of L, 27M, 27N, and 27O. The switching circuit 27G has the tenth to thirteenth AND circuits 27G ₁ , 27G ₂ , 27G ₃ , 27G ₄ and the third,
It is composed of 4-OR circuits 27G ₅ and 27G ₆ , and its output state is as shown in Table 2.

[Table] Next, the operation will be explained. First, when the AC power supply 14 is turned on for use, the positive pulse output from the initial circuit 16 is given to the first one-shot circuit 17C, and the positive pulse output from this one-shot circuit 17C is applied to the UP.
Since it is given to DOWN counter 17A, this
The UP/DOWN counter 17A is reset, and the decoder 17B outputs an "H" level signal from the _O4 output terminal. At this time, the voltage at the connection point C remains zero volts regardless of the change in the resistance value of the thermistor 4, so the second comparator circuit 25B outputs an "L" level signal to the second AND circuit 25C in this state. Therefore, the transistor 25D is turned off, the relay contact 25E is opened, and energization to the heater 2 is not started. Further, since the positive pulse of the initial circuit 16 is applied to the third one-shot circuit 26B via the first OR circuit 24, the flip-flop 26D is reset. At this time, the Q output terminal of the flip-flop 26D outputs an "L" level signal, and the output terminal outputs an "H" level signal, and the first time measuring means 20 maintains the reset state regardless of the output of the first comparing means 18B. As explained in Table 2, the switching circuit 27 outputs an "L" level signal.
G is the output of the first oscillation circuit 27E (“H” for 0.5 seconds,
"L" is output alternately at a timing of 0.5 seconds), and the "off" display LED 13D is made to blink in synchronization with the output of the first oscillation circuit 27E. Next, when the UP switch 12A is closed and the set temperature is set to, for example, "high (180°C)" (a state in which an "H" level signal is output from the _O1 output terminal of the decoder 17B), the temperature of the base 1 will be 180°C. Since the temperature is sufficiently lower than ℃, the second comparison circuit 25B is connected to the second AND circuit 2.
5C and the second one-shot circuit 26A. At this time, the second one-shot circuit 26A sends a positive pulse to the S of the flip-flop 26D.
Since it is applied to the input terminal, the flip-flop 26D is set and outputs an "H" level signal from the Q output terminal, but due to the UP switch 12A being blocked, the third
The one-shot circuit 26B and the delay circuit 26C operate, and a positive pulse is applied to the R input terminal after a slight delay, so that the flip-flop 26D is immediately reset and an "L" level signal is output from the Q output terminal. Therefore, the first clock means 20
Regardless of the output of the comparing means 18B, the reset state is maintained and an "L" level signal is output, and as the heater 2 starts to be energized, the "high" level signal is output.
The display LED 13A blinks in synchronization with the output of the first oscillation circuit 27E to notify that the temperature is not suitable. As a result, the temperature of base 1 rises, and thermistor 4
detects 180°C, the output of the second comparator circuit 25B changes from an "H" level signal to an "L" level signal, so the power supply to the heater 2 is cut off, and the second one-shot circuit 26A sends the positive pulse to the flip-flop 26D. This is applied to the S input terminal of the flip-flop 26D to set the flip-flop 26D. Therefore, the switching circuit 27G switches to the output of the DC power supply circuit 15 and lights up the "high" display LED 13A to notify that the temperature is appropriate. Thereafter, the second comparator circuit 25B alternately outputs "H" and "L" level signals at 180° C., and starts or stops energizing the heater 2 to approximately keep the temperature of the base 1.
Although the temperature is controlled at 180° C., the flip-flop 26D maintains the set state unless the first OR circuit 24 outputs an "H" level signal. After the desired temperature is set, the thermistor 4 detects the set temperature for the first time, and then the first and second timer means 20 and 22 start timer operation based on the variable output of the attitude monitoring means 18. If you leave the iron in a horizontal position in this state,
Since the contact of the mercury switch 9 is opened, the first comparison circuit 18B transfers the "H" level signal to the first AND circuit 19.
is given to the first time measuring means 20 via
This first timer 20 starts a timer operation. After this, when the iron is moved to use and the contact of the mercury switch 9 is closed, the first comparison circuit 1
Since the "L" level signal is output from 8B, the first
The timekeeping means 20 has its timekeeping content reset, and starts counting again as the contact of the mercury switch 9 is opened. However, if three minutes have passed without moving the iron as described above, the first timekeeping means 20 outputs an "H" level signal, the heater 2 is de-energized regardless of the output signal of the second comparison circuit 25B, and the second timer 22 starts a timer operation. Also, at this time, the third to fifth AND circuits 27A to 2
7C outputs an "L" level signal, the second OR circuit 27D outputs an "H" level signal, and the switching circuit 27G outputs the output of the second oscillation circuit ("H" for 0.2 seconds, " Since the "L" is output alternately at a timing of 0.2 seconds, the "OFF" display LED1
3D blinks in synchronization with the output of the second oscillation circuit 27F, indicating that this state is different from the normal "off" state. Therefore, when the iron is accelerated and the contact of the mercury switch 9 is closed in order to use it again within one minute under this condition, an "L" level signal is output from the first comparator circuit 18B. is output, so
The first timekeeping means 20 has its timekeeping content reset, and its output changes from an "H" level signal to an "L" level signal, the second timekeeping means 22 also has its timekeeping content reset, and the control means 25 controls the setting means 17. Control of the heater 2 is restarted by the output (“high” state). At this time, flip-flop 26D is in the set state, so it is used for displaying "high".
LED13A lights up to notify that the temperature is appropriate. Also, if you move the iron to use it again after one minute has passed, the control means 2
5 restarts control of the heater 2 by the output of the setting means 17 (high state), but since the flip-flop 26D is in the reset state by the output of the second timer 22, the first and second timer 2
0 and 22 maintain the reset state regardless of the output of the first comparator circuit 18B, and are used for "high" display.
The LED 13A blinks in synchronization with the output of the first oscillation circuit 27F to notify that the temperature is not suitable. The subsequent operations are similar to those after the non-optimal temperature state described above. Incidentally, in the present invention, the clocking time of the second clocking means 22 is set to 1.
This was determined based on the premise that the temperature of Base 1 would not deviate from the usable temperature range within 1 minute based on the heat capacity of Base 1, which is normally used. It can be changed depending on conditions such as material and destination. Further, the present invention operates in a normal "off" state (a state in which an "H" level signal is output from the _O4 output terminal of the decoder 17B) and a state in which an "H" level signal is output from the first timer 20. The user can distinguish between the two states by changing the blinking cycle of the "off" display LED 13D, but for example, when the former state is present, the "off" display LED 13D is turned on, and when the latter state is present, the LED 13D blinks. It is sufficient if the information is announced in such a way that it can be easily understood. (G) Effects of the Invention As described above, the present invention has a first notification means that continuously reports that the "off" mode is set to cut off electricity to the heating means by the temperature setting means. , posture monitoring means for cutting off electricity to the heating means when the iron is not in use for a predetermined period of time based on the output of the sensor and the timing means for detecting the movement of the iron; When the power is cut off and the mode is in the "off" mode, a second notification means continuously makes a notification different from the notification by the first notification means to notify that the mode is in the "off" mode. Since the iron is left unattended during ironing, when the posture monitoring means determines that the iron has been unused for a predetermined period of time and the power to the heating means is automatically cut off, Continuously notifying that the second notification means is in "off" mode,
To accurately notify a user that the base is not being heated. Here, the notification by the second notification means (the "off" mode based on the user's neglect) is different from the notification by the first notification means (the "off" mode based on the user's operation).
Since the "off" mode is continuously performed in a different form, the user is made aware that the "off" mode was performed based on the user's neglect, and the effect of preventing recurrence of the ironing being left unattended can be enhanced.

[Brief explanation of the drawing]

FIG. 1 is a partial sectional view of an electric iron of the present invention;
FIG. 2 is a perspective view of the grip portion 8A, and FIG. 3 is a schematic electrical circuit diagram. DESCRIPTION OF SYMBOLS 1...Base, 2...Heating means, 17...Temperature setting means, 18...Position monitoring means, 20...Timekeeping means, 25...Controlling means, 27...Notification means.

Claims (1)

[Claims] 1 a base, a heating means for heating the base,
a temperature setting means for setting the temperature of the base; and a first notification means for continuously notifying that the temperature setting means has set an "off" mode for cutting off electricity to the heating means. , a temperature detection means for detecting the temperature of the base, a control means for controlling the heating means based on the outputs of the temperature setting means and the temperature detection means, a sensor for detecting movement of the iron, and a clock means, posture monitoring means for cutting off electricity to the heating means via the control means when the iron is not in use for a predetermined period of time based on the outputs of the sensor and the timekeeping means; When the power to the heating means is cut off and it is in "off" mode,
An electric iron characterized in that it comprises a second notification means that continuously provides notification different from the notification provided by the first notification means to notify that the iron is in the "off" mode.