JPS62295698A - 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 3. Detailed Description of the Invention Field of Industrial Application The present invention relates to a steam iron for general household use.

BACKGROUND OF THE INVENTION Conventionally, steam irons of this type have been used, for example as described in U.S. Pat. No. 4,126,953.
It has been considered to control the opening/closing device so that water is not supplied to the vaporization chamber when the temperature of the base is inappropriate for water evaporation. Specifically, the temperature of the base is sensed by a thermally responsive member such as a bimetal whose one end is fixed to the top surface of the base, and if the base temperature is not suitable for vaporizing water, the water passage is closed via a switching device. This is how it was done.

Problems to be Solved by the Invention However, since the thermally responsive member having such a structure gradually moves as it is heated by the heat of the base, a stable jet of steam cannot be obtained. . That is, as the temperature of the base increases, the thermally responsive member gradually bends upward, and the opening/closing device also gradually moves upward in conjunction with this. When the water passage is opened even slightly, the water in the tank is supplied to the vaporization chamber, and when it comes into contact with this water, the temperature of the vaporization chamber decreases, and the thermally responsive member senses the temperature drop in the vaporization chamber and returns downward. This is because the opening/closing device operates in conjunction with this and closes the water passage again before it is sufficiently opened, resulting in the water supply being stopped. Therefore,
One idea is to use a bimetal that flips over and moves quickly when it reaches a certain temperature, but the problem is that the movement stroke needs to be large in order to open and close the water passage of the steam iron and ensure water circulation. . However, in order to increase the movable stroke by utilizing the reversal of the bimetal, the bending of the bimetal can be made larger and deeper, but the stress at the time of reversal becomes stronger and the ability to follow the base temperature becomes worse, so the water passage is opened. The differential between the temperature and the closing temperature becomes large. Therefore, there are problems in that the water passage does not open even when the base reaches the appropriate temperature for water evaporation, or it does not close even when the temperature drops to an inappropriate temperature, and there is also a limit to its bending shape. It was impossible to obtain an o-ri.

Therefore, the present invention reduces the stress during movement of the thermally responsive member, which moves rapidly when a predetermined temperature is reached, and increases the movement stroke to smooth the flow of water.

A technical means of the present invention for solving the problem described above is to make the end of the recess for accommodating the thermally responsive member higher than the center of the bottom surface.

action The effect of this technical means is as follows.

In other words, when the thermally responsive member is heated and reversed, its end is supported by the end of the recess formed higher than the center of the bottom surface, so the height of the recess is added to the reversal stroke of the thermally responsive member itself. This allows you to get big strokes. As a result, the water passage can be opened rapidly and to a large extent with a small stress during reversal, so that smooth water supply and accurate opening and closing can be performed.

EXAMPLE Hereinafter, an example of the present invention will be described based on the accompanying drawings. In the figure, 1 is a base in which a heater 2 is embedded, and a vaporizing chamber 3 and a steam hole 4 are formed therein. 5 is a pace lid that covers the vaporization chamber 3, and 6 is a cover that covers the entire base 1 from above.

Reference numeral 7 denotes a handle installed above the base 1, and a tank 8 is formed inside. Reference numeral 9 denotes a bottom plate that is fixed to the lower surface of the handle A to define the tank 8, and is formed with an opening 1o and a cylindrical protruding portion 11 that protrudes upward.
A support hole 12 is formed in the upper surface of the support member 1 . 13 is the bottom plate 9
This is a water passage forming member fixed to the back surface of the holder, and covers the opening 10 and the lower surface of the protruding cylindrical part 11, and forms a water passage 14 with the bottom plate 9. Reference numeral 15 denotes a concave portion formed on the outer diameter of the vaporizing chamber 3 of the base 1 so as to be separated from the vaporizing chamber 3, and its end portion 1551L is formed higher than the bottom center portion 15b, and the bottom center portion 1551L is higher than the bottom center portion 15b. 15b. Reference numeral 16 denotes a thermally responsive member such as a reversible bimetal that is placed in the recess 15 and senses the pace temperature and performs a reversal operation.At room temperature, it is bent so that the end 16a is higher than the center, similar to the bottom shape of the recess 16. The center portion is configured to invert upward into a convex shape when heated to a predetermined temperature. Reference numeral 17 denotes a lid that covers the recess 15, and a guide hole 19 is formed in the center of the lid 17 to slidably hold a pin 18 that moves up and down as the thermally responsive member 16 reverses.

Reference numeral 20 denotes a first opening/closing device having a valve shaft 20a integrally provided with an opening/closing valve 21 for opening and closing the opening 10 on the upper part;
0 and the opening 22 of the water passage forming member 13 located below the opening 10, and the spring 23 opens the on-off valve 2.
1 is urged downward to close the opening 1o. 2
4 is a flexible backing that covers the lower surface of the opening 22 of the water passage forming member 13. The first opening/closing device 20 moves up and down via the pin 18 in response to the up and down movement of the thermally responsive member 16 due to the reversal action, thereby opening and closing the opening 1o. 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 . An opening Z is formed in the base lid 5 located below the drip nozzle 25, and the drip nozzle 25
Water dripping from the opening 2 is supplied into the vaporization chamber 3 through the opening 2 and the like. 27 is a second opening/closing device having an opening/closing frame 271L that moves up and down inside the protruding cylinder 11 and opens and closes the opening of the dripping nozzle 2S at its lower end. However, when the upper end operation button 2B is manually pressed downward, the opening/closing frame 2a is lowered and closes the opening of the drip nozzle 25. 29 is a backing that connects the drip nozzle 25 and the opening 26 of the base lid 5.

In the above configuration, when ironing is performed using steam, the operation button 28 is released from the depression, 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 thermally responsive member 16 is in the state shown in FIG. 1, and the on-off valve 21 closes the opening 1o. Therefore, water does not flow into the water passage 14 and is not supplied into the vaporization chamber 3 even if the drip nozzle 25 is opened.

Then, when the base 1 is heated by the heater 2 and reaches the appropriate temperature for vaporizing water, the center portion of the thermally responsive member 16 turns upward into its actual state as shown in FIG. The valve shaft 20& is raised through the opening and closing device 20 to rapidly move the first opening/closing device 20 and open the opening 1o. At this time, since the end 16& of the thermally responsive member 16 is supported by the end 151L higher than the bottom center portion 15b of the recess 15, the end of the recess 16 is supported by the reverse stroke of the thermally responsive member 16 as shown in FIG. A large stroke C, which is the sum of the height B of the portion 151L, can be obtained, and the opening 1o can be opened to a large extent. In this state, the water in the tank 8 passes through the water passage 14 and is supplied from the drip nozzle 25 to the vaporization chamber 3.
The steam generated inside is discharged from the steam hole 4.

Of course, even when in use, press down the operation button 28,
It is possible to stop the supply of water to the vaporization chamber 3 by closing the opening of the dripping nozzle 25 with the second opening/closing device 27, and switching between steam and dry mode can be performed arbitrarily by manual operation.

Note that the bottom surface of the recess 16 extends from the end portion 152L to the center portion 15b.
If the bottom surface of the recess 15 is tilted toward the thermally responsive member 16
Since it is close to the bottom surface of the base, it is possible to better sense the base temperature. Furthermore, the steam iron of the present invention is not limited to the position or shape shown in the examples,
In short, it is sufficient that the height of the end portion supporting the thermally responsive member is added to the reversal stroke of the thermally responsive member.

Effects of the Invention As described above, in the steam iron of the present invention, the end of the recess in which the heat-responsive member is housed is made higher than the center of the bottom surface, so that when it is heated and turned upward in a protruding shape, the end of the recess is raised. Since it is supported by the end of the recess, a large stroke can be obtained, which is the sum of the reversal stroke of the thermally responsive member itself and the height of the recess.

Therefore, the water passage can be opened rapidly and with a small stress during reversal, allowing stable steam to be ejected through smooth water supply, and highly accurate operation at the appropriate water vaporization temperature. That's what you get.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of the main parts of a steam iron showing an embodiment of the present invention, Fig. 2 is a cross-sectional view of the main parts when steam is generated, Fig. 3 is an exploded perspective view of the main parts, and Fig. 4 is the same main parts. FIG. 5 is a top view of the base of the steam iron with the base lid removed, and FIG. 5 is an enlarged view of the main parts. 1...Base, 2...Heater, 3...
...Vaporization chamber, 8...Tank, 14...
Water passage, 16... recess, 15a... end, 16... heat responsive member, 20, 2 completion...
・Switching device. Name of agent: Patent attorney Toshio Nakao and 1 other person
-Head °-Set 3--At once A-゛-Gun 7 15・-Concave p 16゛-Stop water/moving member Fig. 1 February response-Recessed part/6-Response member/&L=- Hanawabe Fig. 2 Fig. 3 Fig. 4 Fig. 5 Fig. 15 /, 5b15 (L

Claims (2)

[Claims] (1) A base heated by a heater, a vaporization chamber provided on this base, a tank placed above the base, a water passage that supplies water in this tank to the vaporization chamber, and this water passage. A steam iron comprising an opening/closing device that opens and closes, a thermally responsive member that operates the opening/closing device, and a recess that accommodates the thermally responsive member, the end of the recess being higher than the center of the bottom surface. (2) The steam iron according to claim 1, wherein the bottom surface of the recess is inclined from the end toward the center.