JP2929863B2 - Cordless iron - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cordless iron that is used to heat a heater built in a base of an iron portion by supplying power from the stand portion when the iron portion is mounted on the stand portion and to use the heater for preheating.

[0002]

2. Description of the Related Art Conventionally, this kind of cordless iron
4 . Hereinafter, the configuration will be described.

As shown in FIG. 1, an iron unit 1 has a heater unit 4 for heating a base unit 3 when the iron unit 1 is placed on a stand unit 2.
The first electrode 5 and the second electrode 5 are supplied to both the iron 1 and the stand 2 respectively.
An electrode section 6 is connected to the control circuit section 7 provided on the stand section 2 via the first and second electrode sections 5 and 6, and the heater section 4 is connected to a commercial power supply via a power plug 8. Thus, electric power is supplied to the heater unit 4. Iron part 1
The control circuit unit 9 provided in the base unit processes the temperature of the base unit 3 detected by the temperature detection unit 10 and outputs the detected temperature signal via the third electrode unit 11 and the fourth electrode unit 12 of the stand unit. , The temperature of the base unit 3 is controlled.

[0004] In the cordless iron having such a configuration, since the second electrode portions 6 of the stand unit 2 is exposed, the second
In addition to the configuration in which the electrode section 6 is covered by a structural means such as a shutter, generally, safety measures are also taken electrically. For example, as shown in FIG. 4 , a magnet 13 is provided in the ironing unit 1, and a reed switch 14 that is turned on when the magnet 13 approaches the stand unit 2 is provided. By detecting the ON signal of the reed switch 14, it is determined that the ironing unit 1 is placed on the stand unit 2. Figure 5 (a) shows the circuit diagram. When the iron unit 1 is placed on the stand unit 2, the reed switch 14 is turned on, and the input voltage E to the microcomputer 15 provided in the control circuit unit 7 is input.
i is, at a high level as shown in FIG. 5 (b), it can be seen that the ironing unit 1 is placed on the stand unit 2. That is, the times T1 and T2 are placed, and otherwise, the ironing unit 1
Is detached from the stand 2. After determining that the iron unit 1 was placed on the stand unit 2, a voltage was applied to the second electrode unit 6 to start heating the base unit 3 of the iron unit 1.

[0005]

In such a conventional cordless iron, the positional relationship between the magnet 13 and the reed switch 14 is important, and it will not function properly unless the magnet 13 and the reed switch 14 are mounted at an optimum position. Had a problem of being restricted.

An object of the present invention is to provide a cordless iron that can secure safety with a relatively inexpensive configuration without structural restrictions and without any structural restrictions.

[0007]

In order to achieve the above object, the present invention comprises an iron portion, and a stand portion mounted with the iron portion and connected to a commercial power supply, wherein the iron portion includes a base portion, A heater section for heating the base section, and a first section for supplying a current to the heater section from the stand section.
An electrode unit, wherein the stand unit includes a heater control unit that controls energization of a heater unit of the iron unit;
A second electrode unit which is in contact with an electrode unit and which allows a current to flow from the commercial power supply to the heater unit by the heater control unit; and a minute current which flows to the heater unit of the iron unit via the second electrode unit and the first electrode unit. A first object of the present invention is to provide a current detecting unit comprising: a current detecting unit for detecting whether the iron unit is mounted on a stand unit by receiving an output of the current detecting unit as an input;

[0008] Further, the heater control system according to the first means for solving the problems described above.
The control unit consists of a relay, and the current detection unit
The resistor and transistor base and emitter connected between
Are connected in series as a second means for solving the problem.

[0009]

According to the first aspect of the present invention, there is provided:
When the iron is placed on the stand, a small current flows between the stand and the heater of the iron, and this small current is detected to detect that the iron has been placed on the stand. it can. The minute current for detecting the placement is set such that there is no danger of electric shock even if the iron part is touched to the electrode part of the stand part when the iron part is not placed on the stand part. That is, the current value is completely different from the current for heating the heater portion, and the current value is much smaller than the heating current for the heater portion, so that safety can be secured.
You.

According to a second aspect of the present invention, when the iron portion is placed on the stand portion, the heater of the iron portion is provided.
The base current of the transistor flows through the
The placement of the iron part can be detected with a small current, and safety can be ensured.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIG. The same components as those in the conventional example are denoted by the same reference numerals, and description thereof is omitted.

As shown in the figure, the ironing section 16 is provided with a heater section 4 for heating the base section 3 and a first electrode section 5 for supplying electric power to the heater section 4. Stand part 1
7 includes a second electrode unit 6 in contact with the first electrode unit 5 of the ironing unit 16 , a heater control unit 18, a current detection unit 19, and a placement detection unit 20, and the heater control unit 18 includes a commercial power supply. The current flowing through the heater unit 4 via the power plug 8 is controlled. The current detection unit 19 connects the iron unit 16 to the stand unit 1.
7, the heater controller 18 controls the second electrode 6
A minute current is supplied to the heater unit 4 through the first electrode unit 5 and the first electrode unit 5 and the current is detected. The placement detector 20 receives the output of the current detector 19 and the iron 16
7 is detected, and its output is input to the heater control unit 18 to control the operation of the heater control unit 18.

The operation of the above configuration will be described. When the iron unit 16 is placed on the stand unit 17, a minute current flows through the heater unit 4 from the heater control unit 18; otherwise, a minute current does not flow. By detecting this, it can be determined whether or not the iron unit 16 has been placed on the stand unit 17. At this time, the current flowing through the heater unit 4 is set to a very small current value in order to determine whether or not the iron unit 16 is mounted. Therefore, when the iron unit 16 is in the detached state, the second electrode unit of the stand unit 17 It is safe to touch 6 . When it is determined that the iron unit 16 is placed on the stand unit 17, the heater control unit 18 applies a voltage to the heater unit 4 from a commercial power supply via the second electrode unit 6 and the first electrode unit 5,
A large current is applied to the heater section 4 to heat the base section 3. If it is determined that the iron unit 16 is not placed on the stand unit 17, the voltage applied to the second electrode unit 6 is stopped by the heater control unit 18, so that it is safe to touch the second electrode unit 6.
is there.

As described above, according to the present embodiment, when the iron 16 is placed on the stand 17,
The first electrode portion 5 and if I and the second electrode portions 6 of the stand portion 17 is even contact, and it can be placed detected, is attached to by <br/> urchin ironing portion of the traditional magnet, it is not necessary to pay attention to the positional relationship between the reed switch mounted on the stand.
In the above embodiment, the iron part 16 is connected to the stand part 1.
7, the heater controller 18 controls the second electrode 6
When it is flowing a minute current to the heater unit 4 via the first electrode portion 5, if example embodiment, it is also allowed to flow a minute current by connecting a high resistance to the commercial power source.

[0015] Next, a second embodiment of the present invention with reference to FIG. 2 will be described. The same components as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

As shown in the figure, when the iron 21 is placed on the stand 31, the heater 4
Is connected to the contact SW1 of the relay through the electrode section (first electrode section) P4 and the electrode section (second electrode section) P3 of the stand section 31, and on / off control of the commercial power supply Vac is performed. A relay is constituted by the contact part SW1 and the coil part RL1, and a transistor Q2 and a relay coil RL1 for controlling the relay are formed.
The heater control unit is constituted by a diode D2 that absorbs a surge voltage generated in the heater. The base of the transistor Q2 is connected to a microcomputer IC, and the transistor Q2 is turned on and off by a mounting signal and a temperature signal input to the microcomputer IC to control the relay coil RL1. The emitter of the transistor Q1 between the terminals of the relay contacts SW1, based, resistors R1 and diode - connects the de D1, constitutes a current detector 19. An electrode portion (first electrode portion) P2 is connected to the other terminal of the heater portion 4 of the ironing portion 21, and this electrode portion P2 contacts the electrode portion (second electrode portion) P1 of the stand portion 31. ,
The electrode part P1 is connected to a contact SW2 of a relay for preventing electric shock, and is connected to another terminal of the commercial power supply Vac. further,
A resistor is connected across the contacts SW2 relay for preventing electric shock R2, when placing the ironing portion 21 on the stand unit 31, the emitter of the transistor Q1, base, a resistor R1, a diode D1, electrode portions P3, P4 , Heater part 4, electrode part P
2, a current flows through P1, and the resistor R2, the transistor Q1 is turned on, an output voltage Vo appears on the resistor R3 connected to the collector of the transistor Q1, and this output voltage Vo is input to the microcomputer IC, and Is placed on the stand 31. When the iron 21 is not placed on the stand 31, the resistors R 1 and R 2 apply a voltage to the electrodes P 3 and P 1 through the resistors, so that even if the electrodes P 3 and P 1 are touched, there is no electric shock. And a resistance value that allows a sufficient current to flow to turn on the transistor Q1.

The bidirectional thyristor TR1 forms the switching unit 32, and turns on the bidirectional thyristor TR1 when the transistor Q1 of the current detecting unit 19 is turned on and the placement of the iron unit 21 is detected. Then, a voltage is applied to the electrode section (fourth electrode section) P5 through the temperature signal detection section 25, and a voltage is applied to the electrode section (third electrode section) P6 of the ironing section 21, thereby operating the temperature signal generation section 23. . The thermistor Rth constituting the temperature detecting section 22 is connected to the temperature signal generating section 23. The temperature signal detection unit 25 detects temperature signals from the temperature detection unit 22 and the temperature signal generation unit 23 of the ironing unit 21 and inputs the detected signals to the microcomputer IC.
Therefore, while the iron unit 21 is placed on the stand unit 31, the temperature signal is input to the microcomputer IC, and after the bidirectional thyristor TR1 is turned on, the temperature signal is input to the microcomputer IC. It is determined that the ironing unit 21 is placed on the stand unit 31. In addition, the microcomputer IC uses the temperature signal to control the transistor Q2 for controlling the heater.
Is turned on and off, and the heater unit 4 is controlled to control the ironing unit 21.
Is maintained at a constant temperature.

The following will describe operations with reference to FIG. 3 in the above structure. Assuming that the output voltage of the transistor Q1 of the current detector 19 is Vo, the microcomputer IC first determines whether the output voltage Vo is at a high level or a low level. Output voltage V
If o is at a high level, the heater section 4 of the iron section 21
A base current flows through the transistor Q1 through the transistor Q1, the transistor Q1 is turned on, and the ironing unit 21 is placed on the stand unit 31. At this time, the bidirectional thyristor TR1 is turned on. If the output voltage Vo is not at the high level, the iron unit 21 is placed on the stand unit 31 and the relay RL1 is turned on, or the iron unit 21 is turned on.
Is not placed on the stand 31.

If the output voltage Vo is at a high level, the bidirectional thyristor TR1 is turned on and the relay RL2 is turned on. The relay RL2 is a relay for preventing an electric shock by touching the electrode portion P1. In the following, the temperature signal detection part 25
Check if the temperature signal is coming. If the temperature signal is received, the iron unit 21 is mounted, and if not, the iron unit 21 is not mounted. When the iron unit 21 is mounted and the temperature signal is higher than the set temperature, the relay RL1 is turned off, and when the temperature signal is lower than the set temperature, the relay RL1 is turned on. Then, the operator again looks at the output voltage Vo. When the temperature is high, the relay RL1 is off and the output voltage V
When o is high level, when the temperature is low, the relay RL1 is on, and the output voltage Vo is low level. Relay R
The microcomputer IC determines whether L1 is on or off.
The on / off of RL1 can be recognized by the microcomputer IC. If the output voltage Vo is low and the relay RL1 is off, the ironing unit 21 is not mounted. At this time, the bidirectional thyristor TR1 is turned off, the relay RL2 is turned off, and the relay RL1 is also turned off. If the output voltage Vo is low and the relay RL1 is on, the iron 21 is placed on the stand 31 and the base temperature of the iron 21 is high. To determine whether the sensor is mounted or not based on the presence or absence of the temperature signal.

As described above, the placement and non-placement of the iron unit on the stand unit are detected, and if the placement is performed, the voltage is applied to the electrode unit. If the placement is not performed, the voltage is applied to the electrode unit. Can be stopped to ensure safety.

[0021]

As described above, the cordless iron according to the present invention is provided.
Consists of an iron part and a stand part equipped with the iron part and connected to a commercial power supply.
A base unit, a heater unit that heats the base unit, and a first electrode unit that allows current to flow from the stand unit to the heater unit, wherein the stand unit controls energization of the heater unit of the iron unit. A heater control unit, a second electrode unit that is in contact with the first electrode unit and allows a current to flow from the commercial power supply to the heater unit by the heater control unit, and the iron unit via the second electrode unit and the first electrode unit. Since an iron detection unit is provided with a current detection unit that detects a small current flowing through the heater unit and a placement detection unit that receives an output of the current detection unit as input and detects whether the iron unit is placed on a stand unit. A small current to the heater section of the
And it can easily detect the placement of the iron part,
Safety can be secured with an inexpensive configuration with few structural restrictions .

Further , the heater control section is constituted by a relay, and the current detection section is formed by connecting the resistor connected between the contacts of the relay and the base and emitter of the transistor in series, so that the iron section is mounted on the stand section. When the iron portion is placed, the base current of the transistor flows through the heater portion of the iron portion via a resistor, and the placement of the iron portion can be detected with a very small current, thereby ensuring safety.

[Brief description of the drawings]

FIG. 1 is a block diagram of a cordless iron according to a first embodiment of the present invention.

FIG. 2 shows a cordless iron according to a second embodiment of the present invention.
circuit diagram

FIG. 3 is a flowchart showing the operation of the cordless iron .
Art

FIG. 4 shows an iron part of a conventional cordless iron
Perspective view of a state detached from the

FIG. 5 (a) shows a placement detection unit of the cordless iron.
Configuration diagram (b) Signal wave of placement detector of the same cordless iron
Shape

[Explanation of symbols]

 Reference Signs List 3 base unit 4 heater unit 5 first electrode unit 6 second electrode unit 16 iron unit 17 stand unit 18 heater control unit 19 current detection unit 20 placement detection unit

Claims (2)

(57) [Claims] 1. An ironing unit comprising: an ironing unit; and a stand unit mounted with the ironing unit and connected to a commercial power supply. The ironing unit includes a base unit, a heater unit for heating the base unit, and the heater unit. The first that allows current to flow from the stand
An electrode unit, wherein the stand unit includes a heater control unit that controls energization of a heater unit of the iron unit;
A second electrode unit which is in contact with an electrode unit and which allows a current to flow from the commercial power supply to the heater unit by the heater control unit; and a minute current which flows to the heater unit of the iron unit via the second electrode unit and the first electrode unit. A cordless iron, comprising: a current detection unit that performs the operation; and a placement detection unit that receives an output of the current detection unit and detects whether the iron unit is placed on a stand unit. 2. A heater control unit comprising a relay for detecting a current.
The sensing part is a resistor connected between the contacts of the relay and the transistor.
Claims wherein the base and the emitter are connected in series.
Cordless iron according to 1 .