JPH03193100A - Cordless iron - Google Patents

Abstract

PURPOSE:To secure safety with simple configuration by detecting the placement of an iron electrically by utilizing the voltage drop of resistors provided at both ends of the switching means of the stand of a cordless iron. CONSTITUTION:When an iron main body part 1 is set at a stand part 2, a placement detecting part 12 detects the fact, and permits the energizing of a stand electrode 8, then, a power is supplied to a heater 4. When a thermosensitive element 5 detects the temperature of a base 3, a signal conversion part 6 converts it to a pulse signal, and it is transmitted to a signal detecting part 9 via a main body electrode 7 and the stand electrode 8. A temperature control part 11 receives it, and controls the temperature of the base 3 at a constant level by opening and closing a switching means 10. At such a case, a closed loop for a commercial power source 14 can be formed via the heater 4 with the function of the placement detecting part 12 by setting the iron main body part 1 at the stand part 2, and a current flows on the resistor 19a, then, a voltage drops. A microcomputer 16 fetches the fact, and judges the placing state of the iron main body part from a voltage waveform.

Description

[Detailed Description of the Invention] Industrial Application Field The present invention has an iron main body that does not have a power cord, and when the iron main body is set on a stand, power is supplied from the stand to a heater built in the iron main body. This relates to a cordless iron that heats the iron.

Conventional technology Conventionally, this type of cordless iron has exposed the electrodes (electrical contacts) on the stand, which is dangerous, so in addition to covering the electrodes with structural means such as a shutter, electrical Generally, measures are taken to prevent electric shock. For example, as shown in FIG. 4, a magnet 28 is provided on an iron main body 21 having a base 24, a heat-sensitive element 25, a signal converter 26, a main body electrode 27, and a stand electrode 29, a signal detector 30, a switching means 31 , a reed switch 3 is installed on the stand section 22 having the temperature control section 32.
3, the iron main body part 21 is set on the stand part 22, a magnet 28 and a reed switch 33 face each other, and the reed switch 33 is turned on by the magnetic force of the magnet 28. By this ON signal, either the iron body part 21 or the stand part 22
It detects that the stand electrode 29 is set and energizes the stand electrode 29.

Problems to be Solved by the Invention However, with such a configuration, the positional relationship between the magnet 28 and the reed switch 33 is important, and if they are not installed in the optimal position, the structure will not function properly, which limits the structural design. They had the challenge of receiving the necessary information.

The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a cordless iron that has no structural restrictions and can ensure safety with a relatively inexpensive configuration.

Means for Solving the Problems In order to solve the above problems, the present invention comprises a cordless iron consisting of an iron body and a stand on which it is set, and the iron body heats the heat of the iron. The stand part includes a heater, a heat-sensitive element that detects base temperature, a signal converter that converts a signal of the heat-sensitive element into a pulse signal, and a main body electrode that supplies power to the heater and the heat-sensitive element. A stand electrode connected to the main body electrode of the iron main body, a signal detection section that detects the output of the signal conversion section, a switching means that opens and closes energization to the heater, and a base temperature based on information from the signal detection section. The apparatus includes a temperature control section that determines the temperature and controls the switching means, and a placement detection section that utilizes a voltage drop across a resistor provided at both ends of the switching means.

Effect of the present invention With the above-described configuration, when the iron main body is set on the stand, a power supply loop is formed through the heater in the iron main body, and a voltage drop occurs across the resistors provided at both ends of the switching means. , detecting the placement of the iron by detecting the voltage (detecting whether the iron body is set on the stand)
This is done to energize the stand electrode.

Furthermore, when the iron main body is not set on the stand, electricity to the stand electrode can be cut off to prevent electric shock.

EXAMPLE Hereinafter, an example of the present invention will be described in detail based on FIGS. 1 to 3.

FIG. 1 is a block diagram of a cordless iron showing an embodiment of the present invention. In the figure, 1 is the iron main body, which includes a heater 4 that heats the base 3 of the iron, a heat-sensitive element 5 that detects the temperature of the base 3, and a signal converter 6 that converts the temperature signal of the heat-sensitive element 5 into a pulse signal. , a main body electrode 7 that supplies power to the heater 4 and the heat-sensitive element 5. Reference numeral 2 denotes a stand part to which the iron main body part 1 is detachably connected and set, and includes a stand electrode 8 connected to the main body electrode 7 of the iron main body part 1, a signal detection part 9 that detects the output of the signal conversion part 6, a switching means 10 for opening and closing energization to the heater 4 via the stand electrode 8;
A temperature control section 117 that determines the temperature of the base 3 based on temperature information from the signal detection section 9 and controls the switching means 10, a placement detection section 12 that uses the voltage drop of a resistor provided at both ends of the switching means 10, and a power supply. It has a code 13.

FIG. 2 is a circuit configuration diagram showing a specific embodiment of the present invention. In the figure,] 4 is a commercial power supply, 15 is a power supply circuit that generates a power supply for the control circuit, and 16 is a microcomputer (having the function of the temperature control section 11) that judges temperature information and controls the temperature by controlling the opening and closing of the switching means 10. ), 17
a・], 7b is heater 4. A relay (a typical example of the switching means 10) that controls energization to 18a and 1.
8b is a relay drive unit, 19a, 19b, and 19c are resistors provided between the terminals of relays 17a and 17b, and placement detection unit 1
2.

Figure 3 shows when the iron body part 1 is placed on the stand part 2,
Alternatively, it is a list showing whether there is a voltage drop in the placement detection unit 12 when the item is not placed.

The operation of the above configuration will be explained with reference to FIGS. 1 to 3. In FIG. 1, when the iron main body part 1 is set on the stand part 2, the placement detection part 12 detects that the iron is placed on either the main body part 1 or the stand part 2, and the iron body part 1 is placed on the stand part 2. energization is allowed, and power is supplied to the heater 4-. The thermal element 5 detects the temperature of the base 3, and the signal converter 6 converts this information into a pulse signal. This pulse signal is transmitted to the signal detection section 9 via the main body electrode 7 and the stand electrode 8. The temperature control unit 11 controls the temperature of the base 3 at a constant level by opening and closing the switching means 10 based on this signal.

Here, regarding the operation of the placement detection section 12, see FIGS. 2 and 3.
This will be explained in detail based on the figures. In the figure, when an iron main body part 1 is set on a stand part 2, a closed loop of commercial power source 14 is supplied via a heater 4. At this time, resistance 19
Current flows through a and a voltage drop occurs. This voltage drop is input to the microcomputer 16, and the placement state of the iron main body is determined from this voltage waveform. The relationship can be summarized as shown in Figure 3. That is, relay 1.
When both 7a and 1.7b are off, it can be determined that there is a voltage drop when an iron is used, and there is no voltage drop when there is no iron. Similarly, when relay 17a is off and relay 7b is on,
It is possible to distinguish between "voltage drop" and "no voltage drop" without ironing. Also, when both relays 17a and 17b are on, there is "no voltage drop" with and without ironing, making it impossible to distinguish, but when ironing is present, temperature information is sent electronically from the iron body 1. Therefore, by combining this information, placement detection becomes possible.

Effects of the Invention As described above, according to the present invention, with the above-described configuration, a cordless iron that performs placement detection electrically can ensure safety with a relatively inexpensive configuration without structural restrictions. It can be used to provide a large amount of energy, and its industrial value is great.

[Brief explanation of drawings]

Fig. 1 is a block diagram of a cordless iron according to an embodiment of the present invention, Fig. 2 is a circuit diagram showing a specific embodiment of the present invention, and Fig. 3 is a block diagram of a cordless iron according to an embodiment of the present invention. FIG. 4 is a block diagram of a conventional cordless iron, which shows a list of the presence or absence of voltage drop in the placement detection section when the iron is placed or not placed. 1... Iron body part, 2... Stand part, 4...
・Heater, 5... Heat sensitive element, 6... Signal converter, 7
... Main body electrode, 8... Stand electrode, 9... Signal detection section, 10... Switching means, 11... Temperature control section, 12... Placement detection section.

Claims (1)

[Claims] Consisting of an iron body and a stand on which to set the iron, the iron body includes a heater that heats the base of the iron, a heat-sensitive element that detects the base temperature, and a signal that converts the signal of the heat-sensitive element into a pulse signal. The stand part includes a conversion part and a main body electrode that supplies power to the heater and the heat-sensitive element, and the stand part has a stand electrode connected to the main body electrode of the iron main body part and a signal that detects the output of the signal conversion part. a detection section, a switching means for opening and closing energization to the heater, a temperature control section for determining a base temperature based on information from the signal detection section and controlling the switching means, and a resistor provided at both ends of the switching means. A cordless iron comprising a placement detection section that utilizes voltage drop.