JPS62101300A - Safety device of 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 [Industrial Application Field 1] The present invention relates to a safety device for irons that prevents heating accidents.

[Prior Art] Among the irons used in the past, there are those that are not equipped with a temperature control device, and those that can be temperature-controlled using a thermostat, bimetal, etc., and that can be heat-proofed.

[Problems to be Solved by the Invention] According to the former method, it is not equipped with a temperature control device. If you forget to turn it off, there is a risk that the water in the tank will run out and the heater will heat up, scorching nearby objects or causing a fire, as well as wasting power. or,
According to the latter, since it is equipped with a temperature control device, there is less risk of fire etc. even if you leave the place while ironing is done or forget to turn off the power switch. However, since the power switch remains on, there is a drawback that power consumption is wasted.

Therefore, the present invention immediately detects whether the iron is not in use and shuts off the power even if you leave the iron while ironing and leave the power switch on, or even if you forget to turn the power switch off. This is to ensure that the generation of electricity and waste of power consumption are prevented.

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention provides, in particular, a usage state detection means for detecting whether the handle is in a usage state where the handle is gripped or not in a usage state where the handle is not gripped; temperature detecting means for detecting whether or not the iron is in a heated state that allows ironing; and in a state in which the temperature detecting means detects a heated state, the use state detecting means detects a non-use state for a certain period of time. The present invention is characterized by comprising a control circuit that cuts off the power supply when the power source is turned off.

[Function] According to the above means, in the process of first turning on the power and heating the base with the heater from room temperature to a temperature that can be ironed, the power will not be cut off even if the handle is not gripped. do not have. When the base is heated to a temperature at which ironing is possible, the user grips the handle and performs the ironing operation, and in the middle of the ironing operation, the ironing operation is interrupted and the power switch is left on. Or, if you forget to turn off the power switch after finishing the ironing work, the power will be cut off after a certain period of time from when the operator takes his hand off the handle.

[Example] An example embodying the present invention will be described below with reference to the accompanying drawings.

In FIG. 1, a handle 2 to be held by an operator's hand is formed at the upper part of a main body 1 of the iron, and a base 4 heated by a heater 3 is provided at the lower part thereof. At the center of the main body 1, there is a heater 3 that controls the heat generation to adjust the temperature of the base 4 from a low temperature of about 80'C (suitable for ironing chemical fibers) to a high temperature of about 200'C (steam is used). An adjustment dial 5 is provided which can adjust the temperature to a level (suitable for ironing cotton or linen). The front upper part of the main body 1 has a check valve (not shown) that can be pushed downward to enable water to be injected into and drained from a water tank (not shown), and also protrudes upward. An operation button 6 is provided to close a check valve (not shown).

In FIGS. 2 and 3, the handle 2 is provided with usage state detection means 7. That is, the handle 2 is provided with a hollow part 8 that is open to the lower side, and a fixed contact 10 is provided at the lower end of a hanging piece 9 that hangs down from the center of the hollow part 8. A support plate 11 having an opening 11A is fixed to the open part of the hollow part 8.

An operating member 12 having an operating portion 12A penetrating the opening 11A and protruding downward is disposed on the upper surface of the support plate 11, and a movable member 12 facing the fixed contact 10 is disposed on the upper surface of the central portion of the operating member 12. A contact 13 is provided. The operating member 12 is normally pressed against the top surface of the support plate 11 by the action of a pair of compression springs 14 interposed between the top surface of the hollow portion 8 (see FIG. 2), and in this state, detects an unused state in which both contacts 10.13 are open and the handle 2 is not gripped by the operator's hands, and as shown in FIG. Both contacts 10 are bent upward against the action of compression springs 14 and 12.
．． 13 is closed to detect the state of use.

Next, an electric circuit for controlling the power source 15 of the heater 3, etc. will be explained with reference to FIGS. 4 and 5. The control circuit CPU, which is composed of a microcomputer,
Arithmetic unit PU, read-only ROM, random access memory RAM.

Timer counter TIM, input circuit IN and output circuit 0
Equipped with tJT etc. The control circuit CPU not only inputs the open/close signals of both contacts 10.13 of the use state detection means 7, but also detects whether the base 4 is at a lower temperature than the predetermined temperature set by the adjustment dial 5. The output signal of the temperature detecting means 16 is input.

Further, the control circuit CPU outputs a signal for turning on and off the power switch according to the output signals of the usage state detection means 7 and the temperature detection means 16, and also outputs a signal for turning on and off the power switch according to the output signals of the use state detection means 7 and the temperature detection means 16, and also outputs a signal for turning the power switch on and off according to the output signals of the use state detection means 7 and the temperature detection means 16, and also sets the power switch from the base 4 to the normal temperature to the adjustment die by the full 5. When the heating reaches the specified temperature, a signal is output to a buzzer drive circuit 17 that drives a buzzer BZ to notify the operator of this.

This embodiment is configured as described above.

The operation of this embodiment will be explained below in accordance with the control flowchart of the control circuit CPU shown in FIG.

First, when the power switch of the heater 3 is turned on, the heater 3 is energized in a switch ST1, and the base 4 is gradually heated by the heater 3 from room temperature. Then,
In step ST2, it is determined whether the base 4 has been heated to the temperature set by the adjustment dial 5. If the base 4 has been heated to the set temperature, the buzzer drive circuit 17 is driven in step ST3 to turn on the buzzer BZ for several seconds. By making a sound for a short period of time, the operator is informed that ironing is possible.

Here, the worker holds the handle 2 and performs ironing work. Since both contacts 10 and 13 of the use state detection means 7 are in the on state while the handle 2 is being held, the judgment in step ST4 is No, and this state is maintained.

Therefore, if the worker leaves the power switch on while the ironing process is in progress, or forgets to turn off the power switch after the ironing process is complete, the operator's hands may become detached from the handle 2. using state detection means 7
Since both contacts 10.13 are in the OFF state, the determination in step ST4 is YES, and the process proceeds to step ST5, where the timer counter TIM in the control circuit CPU is activated.

If the worker grasps the handle 2 and resumes ironing work until a certain period of time (several minutes set in advance, such as 3 minutes or 5 minutes) has elapsed after the timer counter TIM is activated, the usage state Since both contacts 10.13 of the detection means 7 are turned on, this is judged as YES in step ST6, and the timer counter TIM is reset to return to the normal ironing work state in step ST4. return.

If the handle 2 is still not gripped by hand and both contacts 10 and 13 of the usage state detection means 7 remain in the OFF state even after the count value of the timer counter TIM reaches the predetermined time, the step If YES is determined in ST8, the process proceeds to the next step ST9, where the power supply 15 is turned off to cut off the power supply to the heater 3.

This cools down the heater 3, so there is no risk of fire or the like, and there is no wastage of power consumption.

[Effects of the Invention] As described in detail above, the present invention particularly provides a use state detection means for detecting whether the handle is in a used state in which the handle is gripped or in an unused state in which the handle is not gripped, and a heating device that allows the base to be ironed. temperature detecting means for detecting whether or not the power supply is in use; It is equipped with a control circuit that shuts off the

Therefore, even if you leave the power switch on for a while during the ironing process or forget to turn off the power switch after the ironing process is complete, a certain amount of time will pass from the time you let go of the handle. Since the power supply is always cut off, there is no risk of fire or the like due to overheating of the heater, which is safe, and has great effects such as being economical without wasting power.

[Brief explanation of drawings]

Figure 1 is a perspective view of the iron, Figures 2 and 3 are cross-sectional views of the handle showing the usage state detection means, Figure 4 is a block diagram for controlling the power supply, etc., and Figure 5 is a block diagram of the control circuit. 6 are control flowcharts. 1...Body 2...Handle 3...Heater 4...φ...Base

Claims (1)

[Scope of Claims] In an iron that is provided with a heater that is energized when the power is turned on and a base that is heated by the heater at the bottom of the main body that has a handle, the iron is used when the handle is grasped or not. a usage state detection means for detecting whether the base is in a non-use state, and a temperature detection means for detecting whether the base is in a heated state that allows ironing;
It is characterized by comprising a control circuit that shuts off the power supply when the usage state detection means detects a non-use state for a certain period of time while the temperature detection means detects a heating state. Iron safety device.