JPS602298A - Steam 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 Field of the Invention The present invention relates to a steam iron used for finishing clothes, etc.

Configuration of the conventional example and its problems The configuration of the conventional example will be explained with reference to FIGS. 1 and 2.

In the figure, 1 is a base in which a heater 2 is embedded;
06 is a base lid that covers the vaporization chamber 3, and 6 is a cover that covers the entire base 1. 7 is a handle installed above the base 1, and a tank 8 is placed inside. 9 is a bottom plate of the tank 8, which is fixed to the lower surface of the handle 7.The bottom plate 9 has a 1° opening and a cylindrical protruding portion 11 that protrudes upward. A watertight seal 12 is provided at the upper end of the portion 11. A water-tight seal 12 is provided at the upper end of the bottom plate 9. 13 is a water passage forming member fixed to the back surface of the bottom plate 9, and covers the opening 10 and the lower surface of the protruding portion 11, and also seals the space between the bottom plate 9 and the bottom plate 9. A water passage 14 is formed. 15 is a recess formed in the base 1 in the vicinity of the vaporization chamber 3, and a reversible bimetal 16 that senses the base temperature and performs reversal operation is disposed within this recess 16. 1.
7 is a lid that covers the recess 16, and in the center of this lid 17 there is a pin 1 that moves up and down by the reversal action of the bimetal 16.
A guide hole 19 is formed to hold the slider 8 slidably up and down. Reference numeral 2o designates a valve shaft integrally provided with a valve body 21 for opening and closing the opening 10 at the upper part, which passes through the opening 1° and the opening 22 of the water passage forming member 13 located below the opening 10, and is opened by a spring 23. The valve body 21 is biased downward to close the opening 10, and constitutes a first pulp device.

24 is a flexible backing that covers the lower surface of the opening 22 of the water passage forming member 13. The valve shaft 20 moves up and down in response to the vertical movement of the pin 18, and as the valve shaft 20 moves up and down. The valve body 21 opens and closes the opening 10. Reference numeral 25 denotes a drip nozzle provided on the water passage forming member 13 facing the lower surface of the protruding cylindrical portion 11 . A lower opening 26 is formed in the base phthalo located below the dripping nozzle 25.
The water dripping from the lower opening 26 is supplied into the vaporization chamber 3 through the lower opening 26. Reference numeral 27 denotes an opening/closing frame that moves up and down within the protruding cylinder 11 and opens and closes the opening of the dripping nozzle 26 at its lower end, and constitutes a second valve device, and is always urged upward to close the opening of the dripping nozzle 25. Although it is open to
When the operation button 28 at the upper end is pressed downward, the opening/closing frame 2 is lowered to close the opening of the drip nozzle 25. 29 is a backing that connects the drip nozzle 26 and the lower opening 26 of the base lid 5.

In the above configuration, when ironing is performed using steam, the pressure on the operation button 28 is released, the opening/closing frame 27 is raised, and the opening of the dripping nozzle 25 is opened. When the temperature of the base 1 is lower than the appropriate steam temperature, such as when the heater 2 is initially energized, the bimetal 16 is in the state shown in FIG. 1, and the valve body 21 closes the opening 10. Therefore, since no water flows into the water passage 14, no water is dripped into the vaporization chamber 3, and no water is supplied into the vaporization chamber 3.

Thereafter, when the temperature of the base 1 is increased by the heater 2, the bimetal 16 is reversed as shown in FIG. 2, and the valve shaft 2o and the valve body 21 are raised via the pin 18 to open the opening 1o. In this state, the water in the tank 8 passes through the water passage 14 and drips from the drip nozzle 25 into the vaporization chamber 3.
It turns into steam inside and is discharged from the steam hole 4. As mentioned above, if the base temperature is below the appropriate steam temperature,
Since the opening leading from the tank 8 to the water passage 14 is closed, consideration is given to preventing the water in the tank from dripping into the vaporization chamber 3 of the base 1 through the water passage 14. However, in this case, a reversible bimetal 16 is used as the thermal element, and the amount of displacement obtained before and after reversing the bimetal depends on the size of the bimetal (diameter in the case of a disc type), material, operating temperature difference (inversion temperature and However, if the conditions for actual use are satisfied, (outer diameter 1
3. Temperature difference is reversal temperature 180"C1 return temperature 120℃
6011 B), the displacement amount is approximately 0.4 to 0.6 a. Therefore, during mass production, there is a risk that the above displacement amount will be absorbed due to assembly irregularities, resulting in a large number of devices that do not operate. As a countermeasure to this problem, it may be possible to increase the size of the bimetal, but in that case, a large space would be required in the base to accommodate the bimetal, which would result in considerable design difficulties and would not be easy to use.

In addition, in the case of this reversible bimetal, the initial convex shape often deforms during long-term use, and as a result, the operating temperature, especially the return temperature, becomes higher than the initial value, and of course, the temperature changes before and after operation. The amount of displacement becomes small, and eventually a malfunction occurs (in the case of use in this example, the base temperature is high and the valve body 21 closes the opening 10 even though the steam temperature is appropriate). The reason for the above shape change is that when the bimetal is reversed, it overcomes the biasing force of the spring 23 and pushes up the valve shaft 20, so the bimetal receives that force.

As a thermal device, a combination of a heat sensitive body and a permanent magnet is also considered, but the amount of displacement between the heat sensitive body and permanent magnet is small, equal to or less than that of a bimetal, and the drop in adsorption force due to displacement is large, so it is not suitable for practical use. It is something that cannot be done.

OBJECTS OF THE INVENTION An object of the present invention is to address the above-mentioned problems, and to provide a steam iron that can provide a sufficient amount of displacement to ensure reliable operation even during mass production.

Structure of the Invention In order to achieve this object, the steam iron of the present invention has a base forming a vaporization chamber, a tank installed on the base, a tank provided at the bottom of the tank, and the vaporization chamber communicated with each other. A first pulp device having a water passage, a valve body that opens and closes an opening communicating from the tank to the water passage, and a second valve device that opens and closes a drip nozzle communicating from the water passage to the vaporization chamber by a manual operation device. ing. The structure of the first pulp apparatus includes a heat sensitive body having a predetermined cue point, a permanent magnet having a yoke at one end, and an elastically supported body outside the water supply channel including an opening leading from the tank to the water channel. The heat sensitive body is fixed in thermal association with the vaporization chamber, the other end of the permanent magnet is fixed in magnetic association with the heat sensitive body, and the ferromagnetic body and The steam iron is configured such that the valve body is arranged to interlock with each other and opens and closes the first valve device under the force relationship between the magnetic force acting between the permanent magnet and the ferromagnetic body and the elastic supporting force. It is.

DESCRIPTION OF THE EMBODIMENTS An embodiment of the present invention will be described below with reference to the attached FIGS. 3 and 4.

Portions that are the same as those in the conventional example are designated by the same reference numerals, and description thereof will be omitted. 30 is a heat sensitive body having a predetermined Curie point fixed in thermal relation to the base 1;
2 is fixed, and the other end is a permanent magnet that is magnetically associated and fixed to the heat sensitive body 30. 33 is a ferromagnetic material, and is disposed so as to interlock with the valve shaft 20 integrally provided with the valve body 21, and 34 is an elastic material that urges the ferromagnetic material 33 upward.

Next, the operation will be explained.

First, the pressure on the operation button 28 is released, the opening/closing frame 27 is raised, and the opening of the dripping nozzle 25 is opened.

When the temperature of the base 1 is lower than the appropriate steam temperature, such as when the heater 2 is initially energized, the temperature of the heat sensitive body 3 is also lower than its cue point and has magnetism.

Therefore, a magnetic circuit (permanent magnet 31→yoke 32→
A ferromagnetic body 33→heat sensitive body 30) is constructed, and the strong magnetic attraction force of the permanent magnet 31 magnetized in the axial direction overcomes the force of the elastic body 34 and attracts the ferromagnetic body 33 downward. Therefore, the valve body 21 closes the opening 10, so that no water is supplied to the water passage 14. This is the state shown in Figure 3.

Next, when the temperature of the pace 1 rises and becomes higher than the Curie point of the heat sensitive body 30, the magnetism of the heat sensitive body 3o disappears, and the magnetic circuit between the permanent magnet 31 and the ferromagnetic body 33 is terminated at the heat sensitive body 3o. Large magnetic resistance occurs and magnetic attraction becomes weaker.

Therefore, the biasing force of the elastic body 34 overcomes the ferromagnetic attraction force and the ferromagnetic body 33 is pushed upward. At this time, the valve shaft 20 and the valve body 21 integrally provided on the valve shaft 2o are simultaneously pushed up, and the opening 10 is pushed up as shown in FIG.
is opened and water in the tank 8 is supplied to a water passage 14, and through this water passage 14, water is supplied to the vaporization chamber 3 to generate steam.

As described above, the function is equivalent to that of the conventional example.

However, in the case of the embodiment of the present invention, when the base temperature is around the Curie point of the heat sensitive body 30, the amount of displacement is 1.
It has been confirmed from the experimental results that 5 to 2 servings (approximately 3 times more than the conventional example) can be prepared, and its ease of use is clear.

Furthermore, even after long-term use, there is hardly any change in the material-specific characteristics of the Curie point of the heat sensitive element 3o. Therefore, there is no change in operating temperature as seen in conventional bimetals.

Effects of the Invention As explained above, the steam iron of the present invention has a larger amount of displacement of the heat-sensitive part before and after operation (approximately 3 times) compared to the conventional example, which improves the ease of design and assembly. . Furthermore, even during long-term use, there is little change in operating temperature, and there is no fear of malfunction, so it can be said that its reliability is extremely high. Therefore, it is possible to provide a steam iron that can exhibit stable performance over a long period of time.

[Brief explanation of drawings]

Figure 1 is a sectional view of a conventional steam iron;
The figure is a partial sectional view of a conventional steam iron.
The figure is a cross-sectional view of a steam iron showing an embodiment of the present invention, and FIG. 4 is a cross-sectional view of a main part of the steam iron of the present invention. 1... Base, 3... Vaporization chamber, 8...
... Tank, 14 ... Water passage, 20 ...
...Valve body, 26...Dripping nozzle, 3o...
...Thermal sensitive body having a predetermined cue point, 31...
...Permanent magnet, 32...Yoke, 33...
...Ferromagnetic material, 34...Elastic material. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 7 Figure 3 Figure 4 Figure 7

Claims (1)

[Claims] A base having a vaporization chamber, a tank installed on the base, a water passage provided at the bottom of the tank and communicating the tank and the vaporization chamber, and a valve body that opens and closes an opening communicating from the tank to the water passage. a pulp device; and a second valve device that opens and closes a drip nozzle leading from the water passage to the vaporization chamber by a manual operation device, and the first valve device includes an opening leading from the tank to the water passage. A heat sensitive body having a predetermined Curie point, a permanent magnet having a yoke at one end, and an elastically supported ferromagnetic body are provided outside the water supply channel, and the heat sensitive body is thermally associated with the vaporization chamber. The other end of the permanent magnet is fixed in magnetic relation to the heat sensitive body, and the ferromagnetic body and the valve body are arranged to interlock with each other, and the ferromagnetic body and the valve body are arranged to interlock with each other, and a The first pulp device is opened and closed under the force relationship between the magnetic force acting on the iron and the elastic supporting force.