JPS58112592A - Electronic control type iron - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] This invention relates to an electronically controlled iron.

Temperature detection in conventional electric irons generally uses a bimetal, and when setting the temperature, the intervening member connected to the bimetal is connected to a mechanical device using a screw or cam plate. The displacement dimension was converted into a rotation angle, and the position was adjusted to the fiber multi-temperature set on the orbit of the thermometer.

Therefore, due to the need for space to accommodate the thermo knob and other components that have a circular trajectory, the thermo recess should be installed in the center of the body of the handle body 500 or in the As shown in Figure (6), it was inevitably determined at the tip of the handle body 50.In addition, in Figure 8 (A, @), 51ij pace, 52 is a cover, 53 is a water tank, 54 and 55 are thermo knobs.

However, particularly in the former case, the handle body 50 is rounded to be just below the grip part, and the positioning is difficult because it is in the shadow of the hand holding it, so it is difficult to operate with one hand. Also, although the latter does not have the same disadvantage as the former, it is the same as the former in that it is difficult to operate with one hand.

On the other hand, the finishing work for ironing is done with one synthetic fiber.

A good way to use it is to gradually raise the temperature from a low temperature to a high temperature using cotton, linen, or steam.
l[ was surprisingly common, and each time it caused me a feeling of inconvenience.

Accordingly, an object of the present invention is to provide an electronically controlled iron that can perform highly accurate temperature control and can easily perform temperature setting operations at hand.

The electronically controlled iron of the present invention has an output switching circuit in which the output state changes sequentially each time the switch is turned on and off, and the resistance and temperature of the pace part are selected according to the output state 11 of the output switching circuit. A comparator compares the two outputs of a bridge circuit that includes a temperature detection element that detects the By activating the display in response to the sudden output state of the switching circuit, temperature control of the pace section is performed in a positive manner, and the set temperature is also displayed to display the set humidity, making it easy for the user to understand. By taking advantage of the advantage that the temperature detection element 9 display and the power control element can be arranged individually, and the feature of using an electrical on/off switch instead of the conventional thermo switch,
This is a book that allows you to easily set the temperature at your hand by arranging the operating knob of the switch near the grip i of the handle.

An electronically controlled iron according to an embodiment of the present invention will be explained based on FIGS. 1 to 7.

FIG. 1 shows a block diagram of an electronically controlled iron. In the figure, reference numeral 1 denotes an output switching circuit consisting of a pace part of the iron, a temperature detection element for detecting the temperature of the pace part 2#-i, a 3Fi ring counter, and the like. This output switching circuit 3 is connected to the bridge [II] by the output of the ring counter.
The switch 64, which switches the resistance value on one side of v+ and also drives the set temperature display 8 to display the set temperature, is a switch that operates the output switching circuit 3, and changes the output of the output switching circuit 3 every time it is turned on or off. V-ft. 5 is a comparator that compares the two outputs of the bridge circuit including the selected resistor using the outputs of the temperature detection element 2 and the output switching circuit 3, and uses the output to drive the power control element 6 to energize the sheathed heater 7. Control is performed to set the temperature of the pace section 1 to a predetermined setting s7! Keep at temperature. That is, by turning the switch 4 on and off, the temperature of the pace section 1 can be maintained at a desired set temperature, and the set temperature is notified by the set temperature display 8. A specific electrical circuit diagram of the electronically controlled iron is shown. In the figure, 9 is an AC power supply,
A series circuit of a sheathed heater 7 and ten normally open relay contacts is connected. This relay contact 10m closes when a current (described later) flows through the relay contact 10m, and the sheathed heater 7 is energized.

Further, a series circuit of a resistor 11 and a capacitor 12 is connected to the AC power supply 9. This capacitor 12 serves as a constant voltage DC power source for a control circuit to be described later. 13 is a ring counter with a preset function connected in parallel to the capacitor 12), one end 13a is connected to one end of the capacitor 12, and the other end 13b is connected to the other end of the capacitor 12, and is kept at ground potential. . 4 is a switch that is opened and closed by operating the operating means described later, and the container 12
One end of the ring counter 13 with preset function is connected to the first input terminal 13cfSflK. 14 is a resistor connected between the second input terminal 13d and the third input terminal 13e of the ring counter 13 with a preset function, and 15 is the third input terminal 13e of the ring counter 13 with a preset function.
and a capacitor connected to the other end of the capacitor 12, and the values of the resistor 14 and capacitor 15 determine the time constant of the clock pulse for switching the output of the ring counter 13 with a preset function. 13f, 13g, H
lh and 131 are the first output terminal, second output terminal, third output terminal, and fourth output terminal, respectively, of the ring counter with preset function 13;
f, 13g, 13h.

13ゑ is each light emitting display element 16m + 16b *
16c.

The resistor 17 is commonly connected to one end of the resistor 17 via the resistor 16d, and the other end of the resistor 17 is connected to one end of the capacitor 12. Note that the circuit diagram shows four light emitting display elements 16 as an example.
A, 16b, 16c, and 16d constitute a set temperature display.

The temperature detection element 2 has one end connected to one end of the capacitor 12, the other end connected to the inverting input terminal 5a of the comparator 5, and the second output terminal of the ring counter 13 with BriseF F function via the resistor 18. 13g, via a resistor 19 to the third output terminal 13h of the ring counter with preset function 13, and further via a resistor 20 to the fourth output terminal 131 of the ring counter with preset function 13. 21 and 22 are resistors connected in series, and this series circuit is connected in parallel to the capacitor 12.

The connection point between the resistor 21 and the resistor 22 is connected to the non-inverting input terminal 5b of the comparator 5. A transistor 23 is connected in series to the relay coil 10b, and a series circuit of the relay coil 1v10b and the transistor 23 is connected to the capacitor 12 in parallel. transistor 2
The output of the comparator 5 is inputted to the base electrode of 3 through the resistor 24, and when the output of the comparator 5 is at H level, it becomes conductive and the current flows through the relay coil 10bKilE, and the relay contact 10
Close m. 25 is a diode connected in parallel with the relay coil A/10bK.

Next, the operation of this circuit configuration will be explained.

First, the operation of the ring counter 13 with preset function will be explained based on the specific block diagram shown in FIG. 2
6 is a ring counter, and when Km pressure is applied to the terminal 13a as shown in Fig. 4, the preset circuit 27)
It is preset, drives the first output circuit 261, and sets the output of the first output terminal 13f to the L level as shown in FIG. 40. At this time, the second output circuit 26b, the third output circuit 26c, and the @4 output circuit 26d all have an oven collector type configuration, and the second output terminal 13g.

The respective outputs of the third output terminal 13h and the fourth output terminal 131 are shifted by b by 4H as shown in FIG.
level.

Next, when the switch 4 is closed and the input of the first input terminal 13c is set to H level, the values of the resistor 14 and capacitor 15 connected to the second input terminal 134k and the third input terminal 13e K are determined. The oscillation circuit 28 oscillates according to the time constant and outputs a lock pulse as shown in FIG. 4 (6). This clock pulse is the ring counter 2
6, the second output circuit 26b is driven and the second
Only the output of the output terminal 13g is at L level as shown in FIG. 4(G), and the other output terminals 13f, 13h,
The output of 13i becomes H level as shown in the fourth time (O9■, (G)).

Furthermore, when the next clock pulse is input to the ring counter 26, the third output circuit 26C is driven, and only the output of the third output terminal 13h becomes the KL level as shown in FIG.

When the next clock pulse is input to the ringing counter 26, the fourth output circuit 26d is driven, and the fourth output terminal 131
Only the output of is at L level as shown in Figure 4).

Furthermore, when the next clock pulse is input to the ring counter 2d, the first output circuit 26a is driven, and only the output of the first output terminal 13f becomes L level as shown in FIG. 40. Repeat the same below.

Next, the operation of the circuit configuration shown in FIG. 3 will be explained.

First, when the AC power supply 9 is connected, the output of the first output terminal 13f of the ring counter with preset function 13 becomes L level, and tII! A current flows through the I1 light emitting display element 16m and it lights up. 2nd output terminal 13g, 3rd output terminal 13g
Since the output of the fourth output terminal 13i is at H level, the potential at the connection point between the temperature sensing element 2 and the resistor 18 is high, and therefore the input of the inverting input terminal 51 of the comparator 50 is higher than the input of the non-inverting input terminal 5b. (The output of the comparator 5 is L level), the transistor 23 is not conductive, and the relay coil /L'
Since no current flows through 10b, the relay contact 10a is opened and the sheathed heater 7 is not energized. therefore,
The lighting of the first light emitting display element 16m indicates the "off" state in which the sheathed heater 7 is not energized.

Next, K, when the operating means is operated to close the switch 4,
Only the output of the second output terminal 13g becomes L level, and the second
The light emitting display element 16b lights up. In addition, the second output terminal 1
Since the output of 3g is at the L level, the potential at the connection point between the resistor 18 and the temperature sensing element 2 decreases, and the input to the inverting input terminal 5a of the comparator 50 is lower than the input to the non-inverting input terminal 5b.
The output of comparator 5 becomes H level. Therefore, the transistor 23 becomes conductive, and current flows through the relay coil 10b.
Since the relay contact 10m is closed, the sheathed heater 7 is energized and the temperature of the base portion 1 increases. When the temperature of the base portion 1 rises, the resistance value of the temperature sensing element 2 decreases, and the levels of the input to the inverting input terminal 5a and the input to the non-inverting input terminal 5b of the comparator 50 are reversed, and the output of the comparator 5 is inverted. TeL
Once the level is reached, the power supply to the sheathed heater 7 is stopped.

As a result, when the resistance value of the temperature sensing element 2 becomes high, the sheathed heater 7 is energized again. By repeating such operations, the temperature of the base portion 1 is maintained at the first predetermined temperature T.

That is, when the second light emitting display element 16b lights up, it means that the set temperature has been set to the first predetermined temperature T. The resistance value RTH of the temperature sensing element 2 at this time is determined by the following equation.

In addition, R engineering 8. R2□ and R22 are resistors 18 and 2, respectively.
Each resistance value of 1°22 is shown.

Next, when the operating means is operated to close the switch 4,
Only the output of the third output terminal 13h is at L level.
As soon as the light emitting display element 16c is turned on, the temperature of the base portion 1 is maintained at the second predetermined temperature T2. That is, the third
When the light emitting display element 16c lights up, it means that the set temperature has been set to the second predetermined temperature T2. The resistance value RTH2 of the temperature sensing element 2 at this time is determined by the following equation.

“2Ja Note that R□9 is the resistance value of the resistor 19.

Furthermore, when the switch 4 is closed, only the output of the fourth output terminal 13 becomes L level, and the fourth light emitting display element 16d
lights up, indicating that the set temperature has been set to the third predetermined temperature T3. The resistance value RTH3 of the temperature sensing element 2 at this time is determined by the following equation.

Note that Rgo is the resistance value of the resistor 20.

As mentioned above, when the operating means is operated, the set temperatures are sequentially changed from K to K, and each predetermined temperature "r, ,"
T2. The relationship between T and O is the resistance value R□8. of resistors 18, 19, and 20. R engineering 9 # Since it is determined by the relationship of RQO, by setting R engineering, > R engineering 9 > R20,
The temperature of the base portion 1 is sequentially switched to low temperature, medium temperature, and high temperature.

Figure 5 shows a partially cutaway side view of this electronically controlled iron.
FIG. 6 similarly shows a sectional view, and FIG. 7 similarly shows a perspective view of the device in use. In FIGS. 5 to 7, 1 is a base portion of the iron, 2 is a temperature sensing element that is in close contact with the inner surface of the base portion, 30 is a cover that covers the upper part of the base portion 1, and 3
1 is a heat shield plate that covers the upper and rear sides of the cover 30 with a certain gap, and the six posts 31a are installed on the bottom surface of the cover 30.
It is fixed to the capper 30 by tightening the screw 32 through 0. Reference numeral 33 designates a handle body with an open bottom surface, which engages a locking pawl 31b at the rear of the heat exchanger plate 31 with a locking hole (not shown) provided at the rear end edge, and is attached downward to the inner wall surface of the body. It is fixed to the heat shield plate 31 by passing the through hole 31c of the heat shield plate 31 through the protruding post 33a and tightening the screw 34. Reference numeral 35 denotes a handle g cover that closes the rear opening of the handle body 33. By tightening a screw 36 to a post 33b on the inner wall surface of the rear leg portion of the handle body 33 through a boss 35a provided on the inner surface, the handle back cover is closed. 3S is fixed to the handle body 33. 37 is a control board placed in the space formed by the handle body 33, the heat exchanger plate 31, and the handle back cover 35, and the parts constituting the temperature control circuit are mounted on the back of the power supply F lance, the power control element, the capacitor, etc. The tall dovetail is located in the rear leg space of the handle body 33, and the K and other short parts are mounted on the top surface so that they are located in the body space.

Reference numerals 38 and 39 denote auxiliary heat insulating plates, which are interposed between the heat shield plate 31 and the control board 37 to form a multi-layer heat insulating space, and are interposed between the heat shield plate 31 and the auxiliary heat insulating plates 38 and 39. At corresponding positions on the opposite surfaces, there are concave and convex fitting portions 31d, 38m, and 38b for securing heat insulation space and mutual positioning, respectively.
, 39a are provided, and a protrusion 39b for supporting the control board 37 is provided on the upper surface of the uppermost auxiliary heat insulating board 39,
The control board 37 is held between the protrusion 39b and a downward step 33d provided inside the handle body 33. Reference numeral 40 denotes a switch board, which is disposed within the gripping portion of the handle body 33 and fixed with screws 41), on which the switch 4 is mounted. Reference numeral 42 designates an operating knob for operating the switch 16, which protrudes outward from the upper surface of the grip portion of the handle body 33.

43 is a water tank attached to the front part of the handle body 33, and a button 44 for switching between steam and dry is installed at the top. Below this button 44 for switching between steam and dry, there is a nozzle for supplying water to the base part 1. 45 is formed, and its opening/closing is controlled by moving the operating rod 46 up and down. Water supply nozzle/%/
45 is opened, water in the water tank 43 drips into the vaporization chamber 47 of the base part 1, steam is generated, and this steam is ejected from the steam hole formed in the base part 1. Further, the water tank 43 is provided near the grip portion of the handle body 33, and can be removed from the handle body 33 by operating a nine-lock knob 48.

Further, the light emitting display elements 16a to 16d are exposed to the outside through a through hole in the upper surface of the body portion of the handle body 33.

In this way, in this embodiment, the desired set temperature can be easily and accurately obtained by simply turning the switch 4 on and off, and the temperature control accuracy is high. 8. Since the display is automatically displayed, it is easier to distinguish at a glance compared to the conventional bimetal type.When the W power source cord is connected, which of the light emitting display elements 16a to 16d is always lit. Therefore, it is also possible to provide a visual notification function in case the user forgets to turn off the power. In addition, the switch 4 is disposed within the grip of the handle body 33, and its operating knob 44 is projected outward from the top surface of the grip, making it easy to manually set the temperature. can. In other words, since only the compact operation knob 42 can be installed in any position, it is possible to easily operate it with one finger at the front of the handle, which has traditionally been considered an ideal position. It is possible to select white meat, and the design is simple.Especially in the 4-type steam iron, which has a water tank 43 in the front of the handle, there is no space other than the center of the handle body. Although it was not possible to set it up, it is possible to set the temperature at the hand without adversely affecting other aspects such as ease of use by making the grip part thicker.

As described above, the electronically controlled iron of the present invention has -
a temperature sensing element attached to the base part to detect the temperature of the base part; a cover covering the base part; a handle body fixed on the cover; a switch; an output switching circuit whose output state is sequentially switched each time a switch is turned on and off; a plurality of temperature setting resistors, one of which is selected according to the output direction Ilk of the output switching circuit; 11 and 2- resistors, which constitute a bridge circuit together with any one of the plurality of temperature setting resistors, and 2 of the bridge circuit.
a comparator for comparing outputs; a power control element for controlling energization to the heater based on the output of the comparator to maintain the temperature of the base portion at a set temperature; and an output state of the output switching circuit. a display that displays a set temperature according to the switch, the output switching circuit, the plurality of temperature setting resistors, the first and second resistors, the comparator, the power control element, and the display; and an operating knob provided on the outer surface near the grip portion of the handle body to turn on and off the switch, so that highly accurate temperature control can be performed. Another advantage is that the temperature can be easily set by hand.

[Brief explanation of drawings]

Fig. wJ1 is a block diagram of an electronically controlled iron according to an embodiment of the present invention, Fig. 2 is its specific circuit diagram, Fig. 3 is its main part specific block diagram, and Figs. 4 (2) to (g) are its details. Waveform diagrams of each part, Figure 5 is a partially cutaway side view showing the configuration of this electronically controlled iron, Figure 6 is the same (cross-sectional view, Figure 7 is a perspective view of the same state of use, Figure 8 is the same), @ 1 is a side view of a conventional iron. 1... Base portion, 2... Temperature detection element, 3... Output switching circuit, 4... Switch, 5... Comparator, 6...
...Power control element, 7... Sheathed heater, 8... Display device, 18-22... Resistor, 30... Cover, 31
... Heat shield plate, 33 ... Handle body, 42 ... Operation knob

Claims (2)

[Claims] (1) A base part with a built-in temperature sensor, a temperature detection element attached to this base part to detect the temperature of this base part, a cover that covers the base part, and a K on this cover.
(2) A fixed handle body, a switch, an output switching circuit whose output state changes sequentially each time the switch is turned on and off, and a plurality of output switching circuits, one of which is selected depending on the output state of the output switching circuit. a temperature setting resistor, first and second resistors forming a glitch circuit with the temperature sensing element and one of the plurality of temperature setting resistors, and a comparator for comparing two outputs of the bridge circuit; , a power control element that controls energization to the heater based on the output of the comparator to maintain the temperature of the spinning base at a set temperature, and displays a set temperature according to the output state wAK of the output switching circuit. The handle body is equipped with a display, the switch, the output switching circuit, the plurality of temperature setting resistors, the first and second resistors, the comparator, the power control element, and the display. An electronically controlled iron comprising: a board disposed in an internal space; and an operating knob disposed on the outer surface of the handle near the grip portion for turning the switch on and off. (2) The electronically controlled iron according to claim (α), wherein the switch mounting portion of the board is separated as a switch board, and this switch board is arranged in an internal space near the grip portion of the handle body.