JPS58112589A - 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.

As we continue to improve the performance and user-friendliness of irons, it is highly conceivable to research advanced functions by adopting electronic components, but after all, irons are used at elevated temperatures. In addition, there are many disadvantages to the fact that a person can hold the kit in their hand and work on it, especially when it comes to ease of use with an iron and the need to lower the overall height.

In other words, even electronic components with high functionality and performance have the disadvantage of being sensitive to temperature, and some components such as power transformers, power control elements, and capacitors are relatively large in shape, and in the case of specifications with many added functions. .

Effectively incorporating these parts is an extremely difficult task given the limited size of the iron.

In addition, some conventional irons that incorporate electronic components have been put into practical use, but let's take a look at their forms.

It is not built into the iron itself, but is built into a separate case and electrically connected to the iron itself, which overcomes the problem caused by electronic components being sensitive to temperature, as explained above. It was commercialized without incident. In other words, the ironing work is done with 1 synthetic fiber @ Ji
A good way to use it is to set the temperature suitable for hemp, steam and fibers, and gradually raise the temperature from low to high.The number of times you need to adjust the temperature is surprisingly large, and each time you need to set the temperature separately. It can be seen that operating the control case is troublesome and inconvenient. In addition, it is inconvenient for general household use because it has poor storage properties.

Another method is to position the control board in the space near the an part of the iron body where the temperature rise is relatively low, but in order to incorporate large parts such as a power transformer and power control element, it is difficult to It was also common knowledge that when gender was taken into account, it was impossible to make the shape larger than 3Ji.

Therefore, an object of the present invention is to be able to incorporate electronic circuit components without making the shape and size difficult to use, to provide sufficient thermal protection for the electronic circuit components, and to facilitate wiring work. The purpose of the present invention is to provide an electronically controlled iron that can perform the following steps.

An embodiment of the present invention will be described based on FIGS. 1 to 7. In these drawings, 1 is the base part of the iron, 2 is a temperature detection element that detects the temperature of the pace part 1, and 3 is
4 is a cover that covers the base, 4 is a heat plate installed on the cover 3, and has a locking claw 4a at the rear of the top surface and a through hole 4b at the front.
A plurality of convex portions 4c are provided for positioning at a central position.
are provided on the lower surface and are fixed to the cover 3 and screws 5 to the nine bosses 4d. 6 is a handle body consisting of a grip part, a front leg part, a rear leg part, and a torso part, and is attached to the creation lotus heating plate 4 by opening the lower surface of the torso part.

The rear part has a locking hole 6m that fits into the locking claw 4m, and the front part has a boss 6b that protrudes downward from the inner wall of the body of the handle body 6 and faces the through hole 4b.

Furthermore, notches 6c are provided on both sides of the opening, and stepped portions 6d are partially provided on the inner surface of the opening. body 6
The locking hole 6 is locked, and the through hole 4b is connected to the boss 6b.
By tightening with the twist screw 7, a wide space is formed by combining the handle rear leg space A and the handle body space B. Therefore, a larger space can be secured by positioning the boss 6b of the handle body 6 as far forward as possible, and positioning the boss portion 88 for tightening and fixing the rear handle cover 8 as much as possible upward.

9Fi power transformer 10. A power control element 11, an integrated circuit selected according to the purpose of the specification, and a temperature display element 12 arranged for setting the temperature of the iron. In addition, it is a control board on which other electronic components are mounted and printed wiring is applied to the bottom surface, and a part thereof has a hole 9m through which a boss 6b from the inner wall of the body of the handle body 6 is passed. It will be done. In addition.

The control board 9 is fixed so as to be sandwiched between a stepped portion 6d provided on a part of the handle body 6 and a convex s4c provided on the heat shield plate 4, and the outer edge 9bt1 of the handle body 6
It is attached at a fixed distance from the inner wall of the fuselage, with only a portion of it in contact with the inner wall of the body.

13 is a hole provided at the rear of the cover 3.

The cut end face is smoothed so as not to damage the lead wire to be described later. 14Fi is provided at the rear of the heat plate 4, and near the hole 13 of the cover 3, a terminal block 15 is provided with screws 16 or the like.

17Fi heater, 18.18' is a lead wire with one end welded to the heater 17, 19.19' is a lead wire from the temperature sensing element 2, and this lead 118.18'
.

19 and 19' pass through the holes 13 and 14 to the handle body 6.
The leads li 18 and 18' are respectively connected to the terminal block 15. Further, lead wires 20 and 20' from the control board 9 and one end 21 of the power cord are connected 7 to the terminal block 15. In this case, the terminal 21' of the power cord, whose lead wire is not affected by heat, and the lead 48119.19' are connected to the control board 9 via the connector 22.23.

241i A water tank provided in the front part of the handle body 6,
A steam/dry switching button 25 is provided at the top, and an opening/closing nozzle 26 for supplying water to the base 1 is formed at the bottom, which is controlled by the upper and lower operation rods 27. When the water supply opening/closing nozzle 26 opens, the water in the water tank 24 drips into the vaporization chamber 28 of the base part l, generating steam, and this steam flows through the steam hole (
(not shown). Further, the water tank 24 can be removed from the handle body 6 by operating a lock knob 29 provided near the dug portion.

30ti is a switch board connected to the control base 4 [9, on which is mounted the switch device 31, etc., with the II part 31 protruding from the handle body 6, and the inside of the handle body 6 with a minimum size of K11111]. It is attached by screws 32 to. 3
A lead wire 3 connects the control board 9 and the switch board 30.

The main function of the electronically controlled iron configured in this way is to use the temperature detection means for setting the temperature.By changing the temperature detection element 2 from the conventional bimetal type to a thermistor, it is possible to detect when the iron is on and when it is off. In addition to reducing the temperature difference during operation, it also reduces the temperature difference between the initial stage after input and the stable state.

Next, we improved the operating method for setting the temperature from a push-and-turn system to a one-touch switching system using a switch, and also changed the display method from positioning the operating knob to the fiber scale to corresponding to the desired fiber name. This method has advantages such as ease of use, such as the method of lighting a light-emitting display element, and its features are unprecedented.

In other words, to explain its general structure, it consists of an output switching circuit, and by pressing a switch, a light-emitting display element displays the set temperature selected in accordance with the output of the output switching circuit, and also corresponds to the output of the output switching circuit. A comparator compares the output of a bridge circuit including a resistor selected as a resistor and a thermistor (temperature detection element 2) that detects the temperature of the pace part l, and a relay (power control element) is driven by the output of the comparator. This controls the power supply to the heater. In addition.

A detailed explanation of the circuit will be given later.

Next, structural features related to heat insulation for positioning the control board 9 that satisfies the above functions in the largest possible handle space will be described. When the heater 17 is energized, the base portion 1 is heated, and the cover 3 becomes high in temperature due to conduction heat and radiant heat, giving radiant heat to the heat shield plate 4. The heat shield plate 4 is made of heat-resistant resin and maintains the space necessary for heat to be dissipated to the outside through the notch 6c of the handle body 6, so it has an extremely heat insulating effect. Moreover, the control board 9Fi
The heat plate 40, which is set in a dotted manner on any space, has a structure that is almost unaffected by conductive heat. Also,
When heater generates heat, heater terminal, heater lead 1118.1
The 8' group is in a high temperature state, and this lead i118
, 18' are heat conductors, so if they are connected directly to the control board 9, the temperature of the control board 9 will rise due to the conduction heat, causing the temperature of the control board 9 to rise.
In contrast, in this embodiment, the leads are installed at the rear of the heat shield plate 4 where the temperature rise is relatively low, relayed by the terminal block 15, and connected to the control board 9 on the terminal board. Disturbances due to conductive heat in lines 18, 18' are alleviated.

Also, lead wires 18, 18', 19. from the base 3@.
19' are holes 13 and 14 at the rear of the cover 3 and heat shield plate 4.
Since the hot air is drawn out through the leads 4118, 18', 19, 19', the rising air flow is blocked and the hot air is released to the outside through the gap between the cover 3 and the heat shield plate 4.
The electronic circuit components on the control board 9 can be further cooled by the outside air, and the temperature between the lead @18°18' of the heater 17 and the control board 9 can be further sufficiently maintained. Buffering can also be performed more effectively.

In this way, it is possible to ensure a temperature rise that the electronic components can sufficiently withstand, and the large space obtained by this invention has a large base area, so it is possible to mount even more electronic components! It is a power transformer with 1% and 10. ! j Tall parts such as the Shire power control element 11) are placed in the space A in the rear leg of the handle.
By locating the control board 9 in the opening of the body of the handle body 6, it is highly appreciated that design elements are not obstructed by the control board 9. Heat shield plate 4. It has the advantage that it can be assembled smoothly with the cover 3 in an orderly manner, and even in one assembly, the terminal block 15 can be installed in nine places, so that the leads of the heater 17 @1g, 18 can be easily assembled.
' and the lead wires 20, 20' from the control board 9 can be connected at the rearmost part where it is easiest to work.

FIG. 7 shows a specific electrical diagram of the electronically controlled iron. In FIG. 7, reference numeral 50 denotes an AC power source, to which a series circuit of a heater 17 and a normally open relay contact 5111 is connected. When current flows through this relay contact 51m#i, a relay coil 51b (described later) closes, and the heater 17 is energized. Further, a series circuit of a resistor 52 and a capacitor 53 is connected to the AC current 1150. This capacitor 53 serves as a constant voltage DC power source for a control circuit to be described later.

54 is a ring counter with nine preset functions connected in parallel to the capacitor 53;
3, and the other end 54b is connected to the other end of the capacitor 53 and maintained at ground potential. 55 is a switch (corresponding to 31 of 1st &!J), and a capacitor 53
One end is equipped with a preset function. 56 is a resistor connected between the second input terminal 54d and the third input terminal 54e of the ring counter 54 with a reset function, and 57 is the other end of the capacitor 53 and the third input terminal 54e of the ring counter 54 with a preset function. is a capacitor connected to.

The values of the resistor 56 and capacitor 57 determine the time constant of the clock pulse for switching the output of the ring counter 54 with preset function. 54f, 54g.

54h and 54i are a first output terminal, a second output terminal, a third output terminal, and a fourth output terminal, respectively, of the ring counter 54 with a preset function, and these output terminals 54f, 5
4g, 54h, 54i are light emitting display elements 12 Kaede,
It is commonly connected to one end of a resistor 58 via 12b, 12c, and 12d, and the other end of this resistor 58 is connected to one end of a capacitor 53. Note that one circuit diagram shows four light emitting display elements 12ai2b and 12c as an example.

12d constitutes an optical display of the set temperature tL.

One end of the temperature sensing element 2 is connected to one end of the capacitor 53, and the other end is connected to the inverting input terminal 59a of the comparator 590, and also to the second output terminal 54g of the ring counter with preset function 54 via the resistor 60. It is connected to the third output terminal 54h of the ring counter 54 with a preset function via a resistor 61, and further connected to the 1s4 output terminal 54+ of the ring counter 54 with a preset function via a resistor 62.

63 and 64 are resistors connected in series.

This series circuit is connected in parallel to the capacitor 53.

The connection point between the resistor 63 and the resistor 64 is connected to the non-inverting input terminal 59b of the comparator 59.

65 if Relay coil 51bK series connected transistor To9 This series circuit is connected in parallel to capacitor 53. The output of the comparator 59 is input to the base electrode of the transistor 650 via the resistor 66.
When the output of 9 is at H level, it is driven and the relay coil 51
Flow the bK curse and close the relay contact 51a. 67#
i! This is a diode connected in parallel to the J-ray coil 51b.

Next, the operation will be explained.

First, when the AC power source 50 is connected, the output of the first output terminal 54f of the ring counter with preset function 54 becomes L level, and a current flows to the first light emitting display element 12ii, causing it to light up. Since the outputs of the second output terminal 54g, the third output terminal 54h, and the fourth output terminal 54i are at the #iH level, the potential at the connection point between the temperature sensing element 2 and the resistor 60 is high, and therefore the inverting input terminal of the comparator 590 59a is higher than the input of non-inverting input terminal 59b and becomes the output FiL level of comparator 59, transistor 65 is not driven and no current flows through relay coil 51b, so relay contact 51! is open and the heater 17 is not energized. Therefore, the lighting of the first light emitting display element 12a indicates the "off" state in which the heater 17 is not energized.

Next, when the switch 55 is closed, the second output terminal 54
Only the output of g becomes L level, and the second light emitting display element 12
b lights up. Well, since the output of the second output terminal 54g is at L level, the potential at the connection point between the resistor 60 and the temperature sensing element 2 decreases, and the input of the inverting input terminal 59m of the comparator 590 becomes higher than the input of the non-inverting input terminal 59b. becomes low, comparator 59
The output becomes H level. Therefore, transistor 6
5 is driven.

The relay coil 51bK current flows and the relay reading point 51m is closed, so that the heater 17 is energized and the temperature of the base portion 1 rises.

The resistance value of the temperature sensing element 2 decreases due to the temperature rise of the base portion l, and when the input level of the inverting input terminal 59a and the input of the non-inverting input terminal 59b of the comparator 59 are reversed, the output of the comparator 59 is inverted. Then, the level becomes L level, and the power supply to the heater 17 is stopped. As a result, when the resistance value of the temperature sensing cord 2 becomes high, the heater 17 is energized again. By repeating such operations, the temperature of the base portion 1 is maintained at the first predetermined temperature T. In other words, the second light emitting display element 12
When b lights up, it means that the set temperature has been set to the first predetermined temperature Tyu. Resistance value RT of temperature sensing element 2 at this time
H□ is determined by the following formula.

Note that -R60' and R63'' 64 are each a resistor 60.
Each resistance value of 63°64 is shown.

Next, when the switch 55t is closed, the third output terminal 5
Only the output of 4h becomes the L level, the third light emitting display element 12c lights up, and the temperature of the base portion 1 is maintained at the second predetermined temperature T2. That is, the third light emitting display element 1
2c lights up. and the set temperature is the 20th predetermined temperature 1LT2.
It is what was done. The resistance value "TH2" of the temperature sensing element 2 at this time is determined by the following equation.

Note that R6□ is the resistance value of the resistor 61.

Further, when the switch 55 is closed, the fourth output terminal 5
Only the output of 4i becomes L level, the fourth light emitting display element 12d lights up, and the set temperature is set to the third predetermined temperature T3. Resistance value RT of temperature sensing element 2 at this time
H3Fi is determined by the following equation.

Note that R62 is the resistance value of the resistor 62.

As described above, the set temperatures are sequentially changed by turning on and off the switch 55, and each predetermined temperature T, T2. The relationship of T3 is resistance 60.61°62
Since each resistance value R60' is determined by the relationship between R6□ and R6□, by setting %R6o>R6□>R62, the temperature of the base portion 1 is sequentially switched to low temperature, medium temperature, and high temperature.

As described above, the electronically controlled iron of the present invention includes a nine pace part with a built-in heater, a temperature detection element attached to the alpha pace part to detect the temperature of the base part, and a cover covering the base part. and a heat shield plate that is attached to the cover and covers the upper and rear parts of the cover, a grip part, a front leg part, a rear leg part, and a body part. The temperature of the base part is set to a set temperature by controlling the electricity supply to the heater based on the temperature detected by the temperature detection element, the handle body attached to the handle body, the handle rear cover body that closes the rear surface of the handle body, and the temperature detected by the temperature detection element. a temperature control circuit to be held in the substrate, a board on which components constituting the temperature control circuit are mounted and arranged in a space formed by the heat shield plate, the handle body, and the handle rear cover body; a terminal block disposed at the rear to relay the lead wires of the heater; and first and second through holes provided on the rear side surface of the cover and the rear side surface of the heat shield plate, respectively, through which the lead wires are inserted. As a result, electronic circuit components can be built-in without having to change the shape and size of the electronic circuit components, and the electronic circuit components can be sufficiently thermally protected, and wiring work can be easily performed. This has the effect of being able to buffer the temperature between the control board and the heater.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway side view of an electric iron according to an embodiment of the present invention, and FIG. 2 is an exploded perspective view thereof. 3 and 4 are perspective views of the main parts, FIG. 5 is a sectional view of the main parts, FIG. 6 is a perspective view of the main parts, and FIG. 7 is a schematic diagram of the electrical circuit. 1...Base part, 2...Temperature detection element, 3...Cover. 4... Heat shield plate, 6... Handle body, 8... Handle rear cover body, 9... Control board, 17... Heater, 15... Terminal stand. 13.14... Hole Figure 1 Figure 2 Figure 4 Figure 3 Figure 5 Figure 6

Claims (1)

[Claims] A base part with a built-in heater, a temperature detection element attached to the base part to detect the temperature of the base part, a cover covering the base part, and a cover attached to the cover to cover the upper and rear parts of the cover. A heat shield plate, a handle body consisting of a grip 9 part, a front leg part, a rear leg part, and a body part, which is attached to the upper surface of the heat shield plate with the lower surface of the body part open, and the rear surface of this handle body is closed. Controlling energization to the heater based on the temperature detected by the handle rear lid body and the temperature detection element.
A temperature control circuit for maintaining the temperature of the base portion at a set temperature, and components constituting this temperature control circuit are mounted in a space formed by the heat shield plate, the handle body, and the handle rear cover body. a terminal block disposed at the rear of the cover for relaying the lead wires of the heater; and a terminal block disposed at the rear side of the cover and the rear side of the heat shield plate through which the lead wires are inserted. An electronically controlled iron comprising first and second through holes.