JP2701498B2 - Cordless iron - Google Patents

Description

Description: BACKGROUND OF THE INVENTION The present invention supplies power from a stand to a heater incorporated in an iron body when an iron body is set on a stand without an power cord in an airo body. The present invention relates to a cordless iron that is heated by heating.

2. Description of the Related Art Conventionally, this type of cordless iron has a configuration in which the electrodes (electric contacts) of the stand are exposed and are dangerous, so that the electrodes are covered by a structural means such as a shutter and also electrically. It is common to take measures to prevent electric shock. For example, as shown in FIG. 4, a magnet 28 is provided on an iron body 21 having a base 24, a heat-sensitive element 25, a signal conversion unit 26, and a body electrode 27, and a stand electrode 29, a signal detection unit 30, and a switching unit 31. The reed switch 33 is provided on the stand unit 22 having the temperature control unit 32, and the magnet 28 and the reed switch 33 are set in the iron body 21 on the stand unit 22 and the reed switch 33 is opposed by the magnetic force of the magnet 28.
33 turns on. The ON signal detects that the iron body 21 has been set on the stand 22, and energizes the stand electrode 29.

However, in the case of such a configuration, the positional relationship between the magnet 28 and the reed switch 33 is important, and the magnet 28 does not function properly unless it is mounted at an optimum position. Had the problem of receiving

An object of the present invention is to solve the above-mentioned problems, and an object of the present invention is to provide a cordless iron that can secure safety with a relatively inexpensive configuration without structural restrictions.

Means for Solving the Problems In order to solve the above problems, the present invention comprises a cordless iron comprising an iron body and a stand for setting the same, wherein the iron body includes a heater for heating a base of the iron. , A thermo-sensitive element that detects the base temperature,
A signal conversion unit for converting a signal of the thermosensitive element into a pulse signal; and a main body electrode for supplying power to the heater and the thermosensitive element, and a stand part connected to a main body electrode of the iron main body part. A signal detection unit for detecting an output of the signal conversion unit; a switching unit for opening and closing the power supply to the heater; and a temperature control unit for determining a base temperature based on information of the signal detection unit and controlling the switching unit. And a placement detection unit using a voltage drop of a resistor provided in parallel with the switching means.

According to the present invention, when the iron main body is set on the stand, the power supply loop is formed via the heater in the iron main body, and a voltage drop occurs in the resistor provided in parallel with the switching means. By detecting the voltage, the placement of the iron is detected (detecting whether or not the iron main body is set on the stand), and power is supplied to the stand electrode. When the iron main body is not set on the stand, the electric current to the stand electrode can be cut off to prevent electric shock.

Embodiment An embodiment of the present invention will be described below in detail with reference to FIGS.

FIG. 1 is a structural block diagram of a cordless iron showing one embodiment of the present invention. In the figure, reference numeral 1 denotes an iron body, a heater 4 for heating an iron base 3, and
It has a thermal element 5 for detecting the temperature of the base 3, a signal converter 6 for converting a temperature signal of the thermal element 5 into a pulse signal, and a main body electrode 7 for supplying electric power to the heater 4 and the thermal element 5. . Reference numeral 2 denotes a stand unit to which the iron body unit 1 is detachably connected and set, a stand electrode 8 connected to the body electrode 7 of the iron body unit 1, a signal detection unit 9 for detecting an output of the signal conversion unit 6, Switching means 10 for opening and closing the power supply to the heater 4 via the stand electrode 8;
A temperature control unit 11 that determines the temperature of the base 3 based on the temperature information of the signal detection unit 9 and controls the switching unit 10; a placement detection unit 12 using a voltage drop of a resistor provided at both ends of the switching unit 10; Code 13.

FIG. 2 is a circuit diagram showing a specific embodiment of the present invention. In the figure, 14 is a commercial power supply, 15 is a power supply circuit for producing a power supply for a control circuit, 16 is a microcomputer that determines temperature information and performs temperature control by opening and closing control of the switching means 10 (having a function of a temperature control unit 11). , 17a and 17b are relays (switching means) for controlling the energization of the heater 4.
10a and 18b are the relay drive units, 19a and 19b are the resistors provided in parallel with the relay 17a, 19c is the resistor provided in parallel with the relay 17b, and detect the voltage drop between the terminals of 17a By doing so, a placement detection unit 12 that detects whether or not the iron body is placed is configured.

FIG. 3 is a list showing the presence or absence of a voltage drop of the placement detector 12 when the iron body 1 is placed on the stand 2 or not.

The operation of the above configuration will be described with reference to FIGS. In FIG. 1, the iron body 1 is connected to a stand 2
When it is set to the
Is detected to be placed on the stand unit 2, the power supply to the stand electrode 8 is permitted, and power is supplied to the heater 4. The thermal element 5 detects the temperature of the base 3 and converts this information into a pulse signal by the signal converter 6. This pulse signal is transmitted to the signal detection unit 9 via the main body electrode 7 and the stand electrode 8. The temperature control unit 11 opens and closes the switching means 10 in response to this signal to control the temperature of the base 3 to a constant value.

FIG. 2 and FIG.
This will be described in detail with reference to the drawings. In the figure, when the iron main body 1 is set on the stand 2, a closed loop of the commercial power supply 14 is formed via the heater 4. At this time, a current flows through the resistor 19a and a voltage drop occurs. This voltage drop is taken into the microcomputer 16, and the mounting state of the iron main body is determined from the voltage waveform. The relationship is summarized in FIG. That is, when both the relays 17a and 17b are off, it is possible to determine that there is a voltage drop with iron and "no voltage drop" without iron. Similarly, when the relay 17a is off and the relay 17b is on, it is possible to determine that there is a voltage drop with an iron and "no voltage drop" without an iron. In addition, when the relays 17a and 17b are both on, the iron is present and the iron is not present, and there is no voltage drop. Thus, the determination is impossible. Therefore, placement detection becomes possible by combining this information.

As described above, according to the present invention, according to the present invention, there is provided a cordless iron that can secure safety with a relatively inexpensive configuration without structural restrictions by electrically performing placement detection. And its industrial value is enormous.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a cordless iron according to an embodiment of the present invention, FIG. 2 is a circuit configuration diagram illustrating a specific embodiment of the present invention, and FIG. FIG. 4 is a diagram showing a list of the presence / absence of a voltage drop in a placement detector when the placement is not carried out. FIG. 4 is a block diagram of a conventional cordless iron. DESCRIPTION OF SYMBOLS 1 ... Iron body part, 2 ... Stand part, 4 ... Heater, 5 ... Thermal element, 6 ... Signal conversion part, 7 ... Body electrode, 8 ... Stand electrode, 9 ... Signal detection part, 10: Switching means, 11: Temperature control unit, 12: Placement detection unit.

Claims (1)

(57) [Claims] An iron main body and a stand for setting the iron main body. The iron main body has a heater for heating a base of the iron, a heat-sensitive element for detecting a base temperature, and a pulse signal for the signal of the heat-sensitive element. And a main electrode for supplying power to the heater and the thermosensitive element. The stand unit includes a stand electrode connected to the main electrode of the iron main unit, and an output of the signal conversion unit. A signal detecting unit for detecting the temperature, a switching unit for opening and closing the power supply to the heater, a temperature control unit for controlling the switching unit by determining a base temperature from information of the signal detecting unit, and in parallel with the switching unit. A cordless iron comprising: a placement detector that uses a provided voltage drop of a resistor.