JPS60163700A - Temperture fuse apparatus 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 Field of the Invention The present invention relates to a temperature fuse device for irons used in general households.

1. Construction of a conventional example and its problems A conventional temperature fuse device will be explained based on FIGS. 1 to 3. 1 is a base with a heater 2 buried therein. Reference numeral 3 denotes a thermostat, which works intermittently to supply electricity to the heater 2 in order to maintain the surface temperature of the base 1 and L7 linked to a bimetal at a desired set value.

Now, if the above-mentioned thermostand 3 breaks down and it becomes impossible to stop the power supply to the heater 2, it is necessary to cut off the heater 2 from galvanic corrosion before the base 1 reaches an abnormally high temperature. As a means for this purpose, a conductive member 4 having elasticity is used. It is composed of three parts: a conductive member 6 for connecting the heater 2 and the conductive part t14, and a temperature sensing element 6 made of a eutectic alloy that holds the conductive parts 4 and 6 together in a conductive relationship. It had a 1A degree fuse device. The operation of the above temperature fuse device will be explained below.

The temperature sensing element 6 made of the eutectic alloy (for example, eutectic solder) has a melting point lower than the abnormal operating temperature of the base 1, but at least higher than its highest normal operating temperature. Therefore, under normal usage conditions, the temperature sensing element 6
Since the temperature fuse will not melt, the temperature fuse will not cut off power to the heater.

Next, when the thermostat 3 malfunctions and it becomes impossible to turn off the power to the heater 2, the temperature of the base 1 will rise rapidly, but the temperature will reach an abnormal level that will melt the base 1. The temperature sensing element 6 is already melted. Then, since the conductive turtle member 4 has a spring property and is separated from the conductive second member 6, it is possible to stop the current supply to the heater 2, which is a good mechanism.

Problems with the conventional temperature fuse device having the above configuration are shown below.

(1) If the surface condition of the joining part of Doichibetsu 4 and 6 is not good because it is not possible to weld 4 and 6 with Kanpuku 1 element 6 (for example, it is not degreased sufficiently and there is an oil film on the surface) If the conductive members 4 and 6 cannot be reliably joined by the temperature-sensing element 6 (for example, if there is a Coupled with the force of the spring, the conductive members 4 and 6 separated, causing a malfunction that stopped the power supply to the heater 2.

(2) Also, it is difficult to specify the amount ρ of the temperature sensing elements, and if the amount is a little small, the conductive members 4 and 5 will separate even below the normal temperature and the power to the heater 2 will be stopped. Even at high temperatures, the temperature sensing element 6 did not melt at the specified temperature, resulting in a malfunction in which the power to the heater 2 could not be stopped.

(3) Furthermore, in the conventional method, the conductive part A2 constituting the circuit
4 itself has spring properties, and its spring force gives it a feeling #l
When the element 6 melts, it has a mechanism to separate it from the conductive members, so if the spring force is weak, the element 6 will start to melt and there will be a time lag as it cannot be separated instantly. In some cases, the time to stop the power supply to heater 2 was delayed due to this, and malfunctions such as base 1 melting occurred.

On the other hand, if the spring becomes too strong by -1, as mentioned in item (2) above, if the temperature sensing element 6 is not soft enough, the conductive members 4 and 6 will separate even if the temperature is below normal, and the heater 2 will no longer be energized. A malfunction occurred, causing the vehicle to stop.

In any case, in the conventional method, the temperature sensing element 6 and the conductive part A
4, the regulation of the adhesive strength was narrow, and as mentioned above, there were various problems.

OBJECTS OF THE INVENTION The present invention solves these conventional problems and provides a safe temperature fuse device that does not malfunction by ensuring the operation of the iron temperature fuse device.

Structure of the Invention The temperature fuse device of the present invention includes a base heated by a heater, a thermostand that adjusts the temperature of the base, and a temperature fuse device provided in the heater circuit including the thermostat. The fuse device interposes a eutectic alloy as a conductive phase to a part of the paulownia circuit part constituting the heater circuit and connects it in a polymerized state, and also passes a spring device between the circuit members to remove the eutectic alloy. With the above configuration, the present invention provides a temperature fuse device that operates accurately without malfunction and is highly safe.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings.

In FIGS. 4 to 6, 7 is a base in which a heater s is embedded. 9 is a thermostat, which works in conjunction with a bimetal, etc., and has the function of intermittent energization to the heater 8 in order to maintain the E1F0 surface temperature at a desired set value.10 is the first conductor. The member 11 is a second conductive part, and the first conductive part 10 and the second conductive part 11 are electrically connected in a superposed state by a eutectic alloy 12. 14 is an elastic body. , an insulator 13 made of ceramic or the like is installed at the tip of the insulator 13, and is protruded in the direction of imparting elastic force to the eutectic alloy 12. That is, when set in FIG. As for the position, when the eutectic alloy 12 is strongly melted, the insulator 13 passes between the first conductive member 1o and the second conductive sound member 11, and is attached so that it comes to the person's position. There is.

The operation in the above configuration will be explained.

The eutectic alloy 12 is made of a material having a melting point lower than the abnormal operating temperature of the base 7, but at least higher than its highest normal operating temperature. (Usually, it is often 30 to 6 degrees higher than the maximum normal operating temperature.)
. Therefore, in normal usage conditions, the eutectic alloy 12 is not bath-melted, so the first conductive member 10 and the second conductive member 11 are electrically connected and connected to the heater 8. There is no need to stop the power supply.

Next, when the thermostat 9 fails and it becomes impossible to stop the power supply to the heater 8 described in -F, the temperature of the base 7 suddenly rises and the temperature of the surface of the base 7 becomes abnormally high. , the eutectic alloy 12 is melted. However, as mentioned above, the eutectic alloy 12 has the elastic body 14,
The eutectic alloy 12 is connected to the first guide member 10 and the second guide member 10.
Since an elastic force is applied to separate the first conductive part 10 and the second conductive part 11 from each other, when the eutectic alloy 12 is melted, the insulator 13 attached to the tip of the elastic body 14 separates the first conductive part 10 from the second conductive part 10. The heater 8 can pass between the conductive member 11 and the first conductive member 10 and the second conductive member 11, thereby stopping power supply to the heater 8.

As is clear from the above embodiments, according to the embodiments of the present invention, the eutectic alloy 12 can be molded into a rivet shape, making it easy and accurate to specify the amount.

Furthermore, according to the present invention, since the first conductive member 1Q and the second conductive member 11 can be joined by interlocking the eutectic alloy 12,
Table 1 of first conductive member 1o and second conductive part A) Jll
Even if the condition is bad (for example, there is an oil film due to insufficient degreasing), malfunctions that previously occurred will not occur.

゛As described above, if the eutectic alloy 12 of the embodiment of the present invention is used, the amount can be specified in particular, so as shown in the conventional example, 1.
Malfunctions due to differences in i (problems of turning off during normal use or not turning off in abnormal situations) can be resolved. or,
According to the embodiment of the present invention, when the eutectic alloy 12 melts, the elastic body for removing it does not serve as a conductive member as in the past, but is provided separately, so that the spring force is reduced. The regulations have also become simpler and more accurate. (The reason is that conventionally, a conductive member that has elastic force is joined to another conductive member using a eutectic alloy using a soldering method, but in this case, the conductive member that does not have elastic force may be deformed, etc.) ,) The twisting force may change, or the positional relationship between the two conductive parts (especially the difference in the height direction) may cause a change in the force.
.

Therefore, when the eutectic alloy 12 reaches a certain temperature and melts,
At that temperature, the conduction between the first conductive member 10 and the second conductive member 11 is immediately cut off, and reliability in terms of safety is greatly improved.

Effects of the Invention As is clear from the embodiments described above, the temperature fuse device of the present invention has a eutectic alloy interposed as a barrel part in a part of the circuit part constituting the heater circuit so as to be in a Φ-coupled state. By connecting them together and having a structure that removes the eutectic alloy by applying current to the spring device between the circuit parts AA, the temperature fuse device can move to +E@I without malfunction, making it possible to provide an extremely safe iron. be.

[Brief explanation of drawings]

Fig. 1 is a plan view of the main part of a conventional iron temperature fuse device, Figs. 2 and 3 are enlarged views of the main part explaining the operation of the conventional iron, and Fig. 4 is an iron of an embodiment of the present invention. FIG. 6 is an enlarged cross-sectional side view of the essential part, and FIG. 6 is an enlarged plan view of the equipment showing the same operation. 7...Base, 8...Heater, 10...
...First conductive part (circuit member), 11...
・Second conductive department system (circuit department (you), 12... eutectic alloy, 14... elastic body (spring device). Name of agent: Patent attorney Toshio Nakao and others 1 person 1st
Figure 4 Figure 5- Figure 6 Figure 4

Claims (1)

[Claims] It includes a base heated by a heater, a thermostat that adjusts the temperature of the base, and a temperature fuse device provided in the heater circuit including the thermostat, and the temperature fuse device is one of the circuit members constituting the heater circuit. A temperature fuse device for an iron, in which a eutectic alloy is interposed as a conductive member to connect the circuit parts, and a spring device is passed between the phases of the circuit part to remove the eutectic alloy.