JPH0558360B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Field of Industrial Application The present invention relates to a cordless iron that can notify when it is time to reheat the base during ironing.

(B) Conventional Technology The most inconvenient thing about using a cordless iron is that you never know whether the temperature of the base is at an appropriate temperature while ironing.

Taking these points into consideration, for example,
The cordless iron shown in Publication No. 196194 is equipped with a temperature detection element and a battery and charging circuit to operate an appropriate temperature alarm circuit in the iron body, and the iron is equipped with a battery and a charging circuit to operate the temperature detection circuit, and when the base temperature falls below a certain level compared to the set temperature during ironing. When the base temperature becomes low, an appropriate temperature notification circuit is activated to notify the user that the base temperature has become low.

However, if the configuration is such that, for example, a buzzer is used to notify when the temperature of the base has fallen below a certain level, the volume of the buzzer cannot be set to a large amount in order to suppress battery consumption, so the sound of the buzzer may not be heard. It is possible to put it away. If the user misses the sound of the buzzer, the situation will be the same as in the case of a conventional cordless iron that does not have an appropriate temperature notification means, and it will be impossible to distinguish whether the base temperature is at the appropriate temperature.

(c) Problems to be Solved by the Invention Therefore, the present invention has been made in consideration of the above points, and provides a cordless iron that can reliably notify whether or not the temperature of the base is at an appropriate temperature during ironing. The challenge is to provide irons.

(d) Means for Solving the Problems The first invention provides an iron body having a base that is heated by a heating means, and a mounting table on which the iron body can be freely placed and which energizes the iron body when the iron body is placed. and a notification means, wherein the notification means includes at least a power storage device, a display device, and a constant current circuit provided in the iron main body, and when the iron main body is placed on a mounting table, the power storage device and stores the charge in the condenser and supplies the charge to the display via the constant current circuit until the temperature of the base drops to a temperature unsuitable for ironing after the iron main body is removed from the mounting stand. The display is configured to light up when the display is turned on.

A second invention provides a cordless iron comprising: an iron main body having a base heated by a heating means; a mounting table on which the iron main body can be freely placed and which energizes the iron main body when placed; and a notification means. , the notification means includes a buzzer and at least a display provided on the iron body, and lights the display until the temperature of the base drops to a temperature unsuitable for ironing after the iron body is removed from the mounting table. Additionally, the buzzer is configured to sound for a predetermined period of time after the indicator is turned off.

(E) Effect According to the first invention, by keeping the indicator provided on the iron body lit until the temperature of the base drops to a temperature unsuitable for ironing after the iron body is removed from the mounting table, Depending on the lighting status of the display at the user's hand, the user is reliably informed whether the temperature is at the appropriate temperature at any point during ironing.
To improve the workability of ironing. Furthermore, the charge stored in the capacitor is charged while the main unit is placed on the mounting table, and is supplied to the display through a constant current circuit to light the display, so the charge stored in the capacitor To stably notify whether or not the temperature is at an appropriate temperature by lighting a display in a substantially constant state even if the temperature changes.

According to the second invention, the notification means includes a buzzer and at least a display provided on the iron body, and the display remains on until the temperature of the base drops to a temperature unsuitable for ironing after the iron body is removed from the mounting table. The buzzer is configured to sound for a predetermined period of time after the display is turned off, so that the user can be reliably informed of whether the temperature is at an appropriate temperature at any point during ironing, depending on the lighting status of the display at the user's hand. ,
To improve the workability of ironing. Further, even if the user does not notice that the indicator is turned off, the sounding of a buzzer thereafter reliably informs that the temperature of the base has become inappropriate, thereby more reliably informing whether or not the temperature is at an appropriate temperature.

(f) Examples Examples of the present invention will be described based on the drawings. FIG. 1 will be explained. 1 is an iron main body, which is composed of the following members. 2 is a base, 3 is a heater embedded in the base, 4 is a temperature detection thermistor fixed to the base 2, and 5 is the base 2.
An ironing cover 9 which is fixed to the upper surface and has a grip part 7 having a recess 6 at the upper part and a protrusion 8 at the rear part.
10 is a first printed circuit board housed and fixed in the recess 6; 10 is an indicator lamp provided on the front side of the first printed circuit board and exposed to the outside of the iron body; 11;
is a second printed circuit board housed and fixed in the protrusion 8;
12 is a grip cover that covers the upper surface of the first printed circuit board 9; 13 is a back plate that covers the second printed circuit board 11 and is fixed to the iron cover 5; an engaging recess 14 is provided in the lower part of the back plate; A protrusion 15 that protrudes most rearward is provided at the lowest part of the mating recess. A plurality of connectors 17a, 17b, 17c, 17d, 17 16 are fixed approximately at the center of the engagement recess 14 and supply power to the heater 3, the first printed circuit board 9, and the second printed circuit board 11.
A power receiving pin 18 consisting of e and 17f is a tank detachably attached to the front of the iron cover 5.

Reference numeral 19 denotes a mounting table on which the iron main body 2 is placed, and is composed of the following members. 20 is the bottom plate, 2
1 is a top plate with a space 22 formed between it and the bottom plate;
Engagement receiving portion 23 and hole 2 provided close to the engagement receiving portion
4 and a slanted operation/display section 26 connected to the bulge. 27 is a ∩-shaped stand provided on the front side of the upper surface of the upper plate 21;
28 is a drain hole provided at the bottom of the engagement receiving portion 23;
Reference numeral 9 denotes an opening/closing plate having one side pivoted in the bulging part 25 by a shaft 30 and a pressing piece 30 on the other side freely protruding into the engagement receiving part 23, as shown by the two-dot chain line. The pressing piece 30 is always urged to protrude into the engagement receiving portion 23 by a spring (not shown), and the hole 24 is closed by a shielding piece 31 provided above.
32 is a U-shaped power supply plate provided in the bulging portion 25;
3 is a cord winding device provided in the space 22, and supplies AC power through a plug (not shown) provided at the tip of the cord 34. Reference numeral 35 denotes an operation board provided on the lower surface of the operation/display section 26, which includes a plurality of indicators 36, 36...36 for displaying the set temperature, an up switch 37 for increasing the set temperature, and a down switch 38 for lowering the set temperature. has been established. 39 is a reed switch provided in the bulge 25, and when the iron main body 1 is placed on the mounting table 19, a reed switch 39 is activated by a magnet <40 shown in FIG. 2> provided on the back plate 13 of the iron main body 1. It becomes ON state.

Next, the schematic electric circuit shown in FIG. 2 will be explained. Connectors 17a, 17b, 17c, 17d,
17e and 17f are designed to connect the electrical parts provided respectively when the iron body is placed on the 1 placement table 19, and the iron body 1 and the placement table 19 are connected to each other.
It is set up as follows. 41 is an AC power supply.

First, the first and second irons provided on the iron main body 1 side.
The circuits of the electrical components attached to the printed circuit boards 9 and 11 will be described. 42 is a power supply circuit connected between the connector 17a and the connector 17f, and the indicator lamp 10 is connected to the switching transistor 4.
3 and is connected to the power supply circuit 42 via a resistor 44. Reference numeral 45 denotes a first capacitor of relatively large capacity connected in parallel to the series circuit of the resistor 44, switching transistor 43, and display lamp 10, and serves as a power source for lighting the display lamp 10. 4
6 is a first diode connected to the first capacitor 45, and 47, 47 are constant current diodes connected between the base and emitter of the switching transistor 43. This constant current diode 4
7, 47, the resistor 44, and the switching transistor 43 constitute a constant current circuit that keeps the current flowing from the first capacitor 45 to the display lamp 10 constant, and controls the brightness of the display lamp 10 when it is lit. Make it constant.

48 is a bias resistor connected to the base of the switching transistor 43, and 49 is a latch means connected to the power supply circuit 42. This latch means includes a first transistor 50, a second transistor 51, a resistor 52 connected between the base and emitter of the first transistor 50, a resistor 53 connected between the base and emitter of the second transistor 51, A resistor 54 connected between the collector of the first transistor 50 and the base of the second transistor 51, a resistor 55 and a diode 56 connected between the base of the first transistor 50 and the collector of the second transistor 51. It consists of a series circuit and a diode 57 connected between the bias resistor 48 and the collector of the second transistor 51.

58 is a charging capacitor of relatively small capacity connected between the emitter of the first transistor 50 and the emitter of the second transistor 51, and holds the collector potential of the second transistor 51 of the latching means 49 in a latched state. 59 is an absorption transistor whose collector is connected to the base of the second transistor 51 and whose emitter is connected to the emitter of the second transistor 50, and whose base is connected to the connector 17.
c and by the trigger signal on the mounting table 19 side.
It becomes ON state. Reference numeral 60 is connected to the connector 17d and the base of the second transistor 51, and is connected to the mounting table 1.
This is a blocking diode that supplies the trigger signal on the 9 side to the base of the second transistor 51 and prevents potential changes on the latch means 49 side from affecting the mounting table 19 side. The thermistor 4 is connected to the connector 17e
The heater 3 is connected between the connector 17b and the connector 17f.

Next, the operation board 35 provided on the mounting table 19 side.
Let's talk about. 61 is a relay provided in the space 22 and has a relay contact 62 connected between one side of the AC power source 41 and the connector 17b; 63 is a temperature for setting the temperature of the base 2 by the up switch 37 and the down switch 38; A setting means 64 is a display circuit for displaying the temperature set by the output of the temperature setting means on the display 36...36;
65 connects the thermistor 4 via the connector 17e.
66 is the iron main body 1
67 is a proximity switch such as a reed switch that is turned on by the magnet 40 when the temperature setting means 63 and the temperature detection means 6 are placed.
68 is the temperature setting means 6;
The second comparing means compares the setting data of 3 and the temperature data of the temperature detecting means 65, and until the temperature data of the temperature detecting means 65 matches the setting data of the temperature setting means 63, the outputs 0 _{and 1} are used to compare the temperature data of the temperature detecting means 65 through the connector 17c. An OFF trigger signal is output to the base of the absorption transistor 59, and when they match, the output ₀₂ outputs the second transistor 51 via the connector 17d.
Turn it ON to drive the latch means 49.

Reference numeral 69 indicates the temperature data of the temperature detection means 65 and the temperature setting means 6 based on the output of the proximity switch 66 which detects that the iron main body 1 is placed on the mounting table 19.
The timer is reset to 0 when the respective data match with the setting data of No. 3, and counts a predetermined time based on the output of a proximity switch 66 when the iron main body 1 is detached from the mounting table 19. Reference numeral 70 is a buzzer provided on the mounting table 19 side, which sounds for a certain period of time according to the output of the timer when the timer 69 finishes counting a predetermined time, and prompts the user to place the iron main body 1 on the mounting table 19. It is an encouragement. The time point at which the buzzer 70 starts sounding is set by the timer 69 so that it occurs after the latch means 49 is unlatched and the indicator lamp 10 goes out. It is set in advance in consideration of the lighting time of the indicator lamp 10, which is determined by the value of the impedance (resistance in the discharge circuit).

Next, the operation will be described based on FIGS. 1 to 3. When the base surface of the iron main body 1 is placed on the stand 4, the iron main body 1 descends due to its own weight, and the protruding part 15 enters the engagement receiving part 23, and the pressing piece 3
Press 0. Therefore, the opening/closing plate 29 rotates, the shielding piece 31 unblocks the hole 24, the respective connectors come into contact with the power supply plate 32, and the bulge 25 is loosely engaged in the engagement recess 14 at the rear of the iron main body. The proximity switch 66 is turned on by the magnet 40.

Then, when the temperature is set according to the fabric by operating the up switch 37 (t ₁ in Fig. 3), the display circuit 6
4 lights up the indicator corresponding to the set temperature.
In addition, the first comparison means 67
The setting data and the temperature data output from the temperature detection means 65 based on the resistance value of the thermistor 4 are inputted to the , but since the temperature of the base 2 is low and the resistance value of the thermistor 4 is large, each data is If they do not match, the relay 61 is driven by the output of the first comparing means 67, turning on the relay contact 62, and energizing the heater 3 through the connectors 17b and 17f to heat the base 2 (point A in Figure 3). The base 2 is being heated and the relay contact 62 is in the ON state until the set temperature _t1 is reached. On the other hand, the second comparison means 68 also includes the temperature setting data and the thermistor 4.
Detected temperature data is input, but since the respective data do not match, an OFF trigger is output from output 0 to ₁ via the connector 17c to turn off the absorption transistor 59. Therefore, the second transistor 51 and the first transistor 50 are turned OFF.
Since the state is maintained and the collector potential of the second transistor 51 is high, the switching transistor 43 is in the OFF state and the indicator lamp 10 does not light up. However, during the period when the indicator lamp 10 is off, the connector 17a and the connector 17
The power supply circuit 4 is powered by the AC power supplied by f.
2, a predetermined voltage is applied to the first diode 46 and the second diode 46.
appears through the diode 71 and connects to the first capacitor 4
5 and the second capacitor 58 are charged.

When the base temperature eventually reaches the set temperature _t1 , the set data on the input side of the first comparing means 67 and the temperature data match, and the relay contact 62 is turned OFF, and the set data on the input side of the second comparing means 68 and the temperature match. Since the data also match, an ON trigger is output from the output Q ₂ via the blocking diode 60, and the second
The transistor 51 and the first transistor 50
It is turned on and becomes a latched state, and since the collector potential of the second transistor 51 becomes low, the switching transistor 43 turns on and the indicator lamp 10 lights up to indicate that the base temperature has reached the set temperature. On the other hand, the timer 69 is reset to 0 when it is detected that the set data and temperature data match and the set temperature is reached. As above, setting data > temperature data, relay contact 6
Turn on 2, energize heater 3, and set the setting data ≦
For temperature data, the relay contact 62 is turned OFF to stop energizing the heater 3 and maintain the set temperature _t1 .

Thus, when performing ironing work, the iron main body 1 is removed from the mounting table 19 (FIG. 3 c), but at this time, all the connectors 17
a...17f is disconnected, and the power supply to not only the heater 3 but also the power supply circuit 42 is cut off. However, since the latching means 49 is held in the latched state by the charge of the second capacitor 58, the second transistor 50 is turned on, so the indicator lamp 10 is caused by the discharge current of the first capacitor 45. Continues to be lit. Although the voltage across the first capacitor 45 gradually decreases as time passes during the ironing process, the brightness of the display lamp 10 remains approximately constant due to the constant current circuit including the constant current diodes 47, 47. Furthermore, since the proximity switch 66 is turned off as the iron main body 1 is removed, the timer 69 starts counting a predetermined time. Eventually, the base temperature gradually decreases and when it reaches a temperature unsuitable for ironing (point t2 in Figure 3) (point D in Figure ₃ ), the temperature at which the base temperature drops from approximately the temperature _t1 to the temperature _t2 is set. 2
The latched state is released by a time constant determined by the impedance values of the capacitor 58 and the latching means 49, the switching transistor 43 is turned off, the indicator lamp 10 is turned off, and the user is informed that the temperature has become unsuitable for ironing. Inform. Setting the time from H to D in Figure 3 using the above-mentioned time constant is, for example, when the setting temperature is recently set to ``Fake'' and the fabric is damp, it is possible to change from the optimum temperature t <sub>1</sub> to ironing at ``Failure''. The standard is until the temperature drops to an unsuitable temperature _t2 .

When the indicator lamp 10 goes out in this way, the iron body 1 is placed again on the mounting table 19 and the heater 3 is energized again to heat the base 2 (point in Fig. 3). If the user does not notice that the indicator lamp 10 is turned off or notices it late, the timer 6 is activated after the indicator lamp 10 is turned off.
9 finishes counting the predetermined time, and the buzzer 70 of the mounting table 19 sounds for a certain period of time (about 5 seconds) to prompt the user to place the iron main body 1 on the mounting table 19. (Point E in Figure 3), and when the iron body 1 is placed on the mounting table 19 while the buzzer 70 is sounding, the proximity switch 66 is turned on again, stopping the function of the timer 69 and immediately causing the buzzer 70 to sound. Stop at. Thereafter, the above-mentioned operation is repeated.

In the present invention, the time period during which the latching means is latched after the iron body is placed is fixed;
It may be possible to make it variable according to the set temperature (fabric). For example, if the set temperature is high, such as for ``linen'', shorten the latch time and set the temperature <sub>t2</sub> , which is not suitable for ironing, to a high value, and if the set temperature is low, such as for ``basen'', the latch time is set to a high value. and set _t2 to a low value. Further, the indicator lamp may be turned on only after the temperature reaches a temperature unsuitable for ironing.

(G) Effects of the Invention According to the first invention, the indicator provided on the iron body remains lit until the temperature of the base drops to a temperature unsuitable for ironing after the iron body is removed from the mounting table. This system reliably informs the user whether or not the temperature is at an appropriate temperature at any point during ironing, depending on the lighting status of the display at the user's hand.
The workability of ironing can be made extremely good. Furthermore, the charge stored in the capacitor is charged while the main unit is placed on the mounting table, and is supplied to the display through a constant current circuit to light the display, so the charge stored in the capacitor Even if the temperature fluctuates, the indicator can be lit in a substantially constant state to stably notify whether or not the temperature is at an appropriate temperature.

According to the second invention, the notification means includes a buzzer and at least a display provided on the iron body, and the display remains on until the temperature of the base drops to a temperature unsuitable for ironing after the iron body is removed from the mounting table. The buzzer is configured to sound for a predetermined period of time after the display is turned off, so that the user can be reliably informed of whether the temperature is at an appropriate temperature at any point during ironing, depending on the lighting status of the display at the user's hand. ,
The workability of ironing can be made extremely good. In addition, even if you do not notice that the display goes off, the buzzer will sound afterwards to reliably notify you that the base temperature has reached an inappropriate temperature, making it more reliable to notify you whether the temperature is at an appropriate temperature or not. It can be carried out.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of the cordless iron of the present invention, FIG. 2 is an electric circuit, and FIG. 3 is a base temperature characteristic diagram. 1...Iron body, 2...Base, 3...Heater, 10...Display lamp, 19...Placement stand, 4
9... Latching means, 63... Temperature setting means, 66
... Temperature detection means, 69 ... Timer, 70 ...
buzzer.

Claims (1)

[Scope of Claims] 1. An iron body having a base that is heated by a heating means; a mounting table on which the iron body can be freely placed and which energizes the iron body when placed;
In the cordless iron comprising a notification means, the notification means includes at least a power storage device, a display device, and a constant current circuit provided in the iron main body, and when the iron main body is placed on a mounting table, the power storage device is charged. and, after the iron main body is removed from the mounting table, until the temperature of the base falls to a temperature unsuitable for ironing, the electric charge stored in the capacitor is supplied to the display device via the constant current circuit to A cordless iron characterized in that a display device is configured to light up. 2. An iron body having a base heated by a heating means, and a mounting table on which the iron body can be freely placed and which conducts electricity to the iron body when placed;
In a cordless iron comprising a notification means, the notification means includes a buzzer and at least a display provided on the iron main body, and the iron main body is removed from the mounting table until the temperature of the base drops to a temperature unsuitable for ironing. The cordless iron is characterized in that the display device is turned on for a predetermined period of time, and the buzzer sounds for a predetermined period of time after the display device is turned off.