JPH01129900A - Electric iron - Google Patents

Abstract

PURPOSE: To speedily fuse a temperature fuse when the base is heated to an abnormal temperature, to surely attain safety by providing the temperature fuse at a part positioned on the side of the upper surface of a base and on the tip side rather than the intermediate part in the longitudinal direction of the base. CONSTITUTION: On the side of the upper surface of the base 1, the temperature fuse 13 is provided at a part positioned on the tip side rather than the intermediate part in the longitudinal direction of the base i.e., the upper surface part of a lid board 6. When the base 1 is heated to an abnormal temperature because of a fault of a thermostat 4 in a state where the electric iron is mounted in a self-standing state, convection heat at a high temperature is diffused from the upper surface of the base 1 and elevated to the tip side of the base 1. The fuse 13 is provided on the tip side of the base 1, thereby the convection heat contacts this fuse 13, which is heated and fused to attain safety. Of course, even in a state where the base is horizontally arranged, the convection heat is raised to the upper side of the upper surface side of the base 1 and the fuse 13 is fused to secure safety.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Field of Application) This invention relates to an electric iron used for press-finishing clothing and the like.

(Prior Art) This type of electric iron has a handle attached to a base equipped with a heater, and is used by holding the second handle in your hand and pressing the bottom surface of the base against the fabric. It is. A thermostat that conducts to the heater and a temperature fuse are provided on the upper surface of the base and are spaced apart from and facing the base, and the thermostat controls the supply of electricity to the heater, and this control maintains the temperature of the base at a selected set temperature. When the temperature of the base rises to an abnormal level due to a malfunction of the thermostat or the like, the temperature fuse is blown by the heat, and this blowing cuts off the power supply to the heater. The thermostat and temperature fuse are arranged on the rear end side of the base for reasons of wiring and installation.

(The target point to be solved by the invention) When an electric iron is actually used and the base is placed horizontally, if the base rises to an abnormal temperature, convection will occur on the top side of the base. Since the heat rises and makes good contact with the temperature fuse, the temperature fuse quickly blows out, ensuring safety. However, in the conventional configuration in which the temperature fuse is disposed at the rear end of the base, the ironing operation is interrupted for a period of time and the electric iron is placed freestanding on the floor. When the temperature of the base rises to an abnormal level, the convective heat dissipated from the base rises along the base toward the tip of the base, reducing the chances of the convective heat coming into contact with the temperature fuse. There is a risk that the timing of fusing will be delayed, and the temperature of the base will rise even more, which could eventually lead to a fire. In particular, when the ironing operation is temporarily interrupted and the electric iron is allowed to stand on its own, the user often leaves the electric iron unattended, which further increases the danger. This invention aims to solve these problems.

[Structure of the Invention] (Means for Solving the Problems) In order to solve the above problems, the present invention provides a handle on a base equipped with a heater, energizes the heater through a temperature fuse, The temperature fuse is cut off to cut off electricity to the heater when the temperature of the base rises to an abnormal temperature, and the temperature fuse is placed on the upper surface side of the base and on the tip side of the base rather than the middle part in the longitudinal direction of the base. It is designed to be installed in a certain position.

(Function) When the electric iron is placed in a free-standing state and the base rises to an abnormal temperature, high-temperature convection heat is dissipated from the upper surface of the base, and this convection heat flows along the base. rises to the tip side. Here, since the temperature fuse is provided in the part located on the tip side of the base rather than the middle part, the convection heat comes into good contact with this temperature fuse,
This heats the temperature fuse sufficiently and blows it out quickly, ensuring safety.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

In the figure, reference numeral 1 denotes a die-cast base made of, for example, an aluminum alloy.A heater 2 is cast into this base 1, a vaporization chamber 3 is formed on the upper surface of the front end of the base 1, and a well-known thermostat 4 is formed on the upper surface of the rear end of the base 1. is installed. The vaporization chamber 3 communicates with the lower surface side of the base 1 via the communication path 5,
Further, the opening on the top surface of this vaporization chamber 3 is sealed with a metal lid plate 6. A heat shield plate 7 is attached to the upper surface of the base 1, this heat shield plate 7 is covered with a heat shield cover 8, and a handle 9 is attached on the heat shield cover 8. A U-shaped water tank 10 is removably attached to the front part of the handle 9, and this water tank 10 has a nozzle (not shown) on the lower surface, and this nozzle is connected to the heat shield cover 8, It passes through the heat shield plate 7 and the lid plate 6 to face the inside of the vaporization chamber 3, and the water tank 10
The water contained in the interior is appropriately supplied into the vaporization chamber 3 through this nozzle, and this water is vaporized by the heat of the base 1 and becomes steam, and this steam passes through the communication path 5 into the vaporization chamber 3. The liquid is ejected onto the lower surface of the base 1.

Further, a temperature fuse 13 is provided on the upper surface of the base 1 at a portion located closer to the tip than the intermediate portion in the longitudinal direction of the base, for example, on the upper surface of the cover plate 6. As shown in FIG. 3, this temperature fuse 13 is connected in series to the heater 2 and thermostat 4 via lead wires 14.14, and its charging portion 13a,
13a and is inserted into a heat-resistant tube 15, and a temperature fuse 1 is inserted around the outer periphery of this tube 15.
A portion corresponding to 3 is covered with a heat-resistant and electrically insulating protective tube 16. The upper half of the protective tube 16 projects toward the upper surface of the heat shielding plate 7 through an opening 17 formed in the heat shielding plate 7, and the upper end surface of the protective tube 16 and the lower surface of the heat shielding cover 8 meet. A leaf spring 18 having a trapezoidal cross section is interposed between the two, and this leaf spring 18 protects the protective cylinder 1.
6 is elastically pressed against the lid plate 6 of the vaporization chamber 3.

Next, we will discuss the effect.

When the base 1 rises to an abnormal temperature due to a malfunction of the thermostat 4 while the electric iron is placed in a free-standing state, high-temperature convection heat is dissipated from the top surface of the base 1.
This convection heat rises along the base 1 toward the tip side of the base 1. Here, the temperature fuse 13 is provided on the tip side of the base 1, and therefore, the convection heat comes into good contact with the temperature fuse 13, and the temperature fuse 13 is thereby sufficiently heated and quickly blown out, thereby accurately blowing the temperature fuse 13. Safety is ensured. Of course, even when the base 1 is placed horizontally, the convection heat rises upwards on the upper surface of the base 1 and similarly contacts the temperature fuse 13, so that the temperature fuse 13 is quickly blown out. Safety can be ensured accurately.

Furthermore, in this embodiment, the temperature fuse 13 is connected to the protective tube 16.
The base 1 is in contact with the base 1 through the cover plate 6, so that the heat of the base 1 is transmitted to the temperature fuse 13 by conduction, thereby further improving the responsiveness of the temperature fuse 13.

[Effects of the Invention] As explained above, according to the present invention, when the base is placed horizontally, even when the electric iron is placed in a free-standing state, when the base rises to an abnormal temperature, In addition, the temperature fuse can be quickly blown out to ensure safety.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a partially broken side view of an electric iron, Fig. 2 is a sectional view taken along the line ■-■ in Fig. 1, and Fig. 3 is a diagram showing a temperature fuse. The side view, FIG. 4, is a perspective view of the leaf spring. 1...Base, 2...Heater, 9...Handle,
13...Temperature fuse. Applicant's agent Patent attorney Takehiko Suzue Figure 1 Figure 3 Figure 4

Claims (1)

[Claims] A handle is provided on a base provided with a heater, the heater is energized through a thermal fuse, and when the temperature of the base rises to an abnormal temperature, the thermal fuse is fused to cut off the energization of the heater, wherein the thermal fuse An electric iron characterized in that the electric iron is provided on the upper surface side of the base and at a portion located closer to the tip than the middle portion in the longitudinal direction of the base.