JPS58158826A - Multiple point temperature sensitive switch - 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 The present invention relates to a bimetallic multi-point temperature-sensitive switch for controlling multi-point temperatures.

Nine temperature-sensitive switches using bimetal have been widely used in the past, but their structure is as shown in Figure 1, in which two metal plates with different coefficients of thermal expansion are pasted together and then shaped into strips. The processed bimetal electrode 1 is opposed to the fixed electrode 2 via the insulating base 3, and the bimetal electrode 1 is set in such a way that it vibrates against the fixed electrode 2 at a required temperature. However, due to the structure of the above temperature-sensitive switch,
K senses the temperature of multiple points instead of only sensing the temperature of one point.
It is necessary to prepare as many temperature-sensitive switches as there are nine.

SUMMARY OF THE INVENTION An object of the present invention is to provide a temperature-sensitive switch that solves the above-mentioned drawbacks.

Describing the structure of the present invention, the present invention provides a temperature-sensitive switch using a bimetal made by bonding two metal plates with different coefficients of thermal expansion, in which a base and a common base are mounted on the base. a bimetal electrode having a plurality of arm pieces having different lengths extending in parallel laterally from the common base; and a position on the base corresponding to the tip of each arm piece of the bimetal electrode. This is a multi-point temperature-sensitive switch composed of a plurality of fixed electrodes.

The present invention will be explained below by way of examples with reference to the drawings.

tsz diagram is a perspective view of an embodiment of a multi-point temperature-sensitive switch according to the present invention. In FIG. 2, a common base of bimetallic electrodes 21 is attached to one side of an insulating base 23. In FIG. The bimetal electric wire 1i21 has a comb-like shape in which a plurality of arm pieces having different lengths extend laterally from a common base in parallel. Next, a fixed electrode 2 is placed on the base at a position corresponding to the tip of each of these multiple arm pieces.
2m.

22b and 22c are provided. In this way, three sets of switches are configured.

Next, to explain the operation of the switch shown in FIG.
, , Ll are rounded, each yielding a different amount of deflection under a certain temperature. There, the fixed electrode 22 insects face each other.

By keeping the gaps between 22b and 22c constant, three temperature-sensitive points can be set.

Note that the present invention is not limited to the above embodiments,
It has a structure in which the contact gap can be changed freely, and it is made of glass, plastic, metal, etc. to insulate it from the outside air.
Alternatively, a container made of a combination of these may be used to form a sealed structure.

As described above, according to the present invention, since multiple temperatures can be sensed with one element, there is an advantage that accurate temperature difference setting can be easily and inexpensively carried out.

[Brief explanation of drawings]

FIG. 1 is a perspective view of an example of a conventionally used temperature-sensitive switch, and FIG. 2 is a perspective view of an example of a multi-point temperature-sensitive switch according to the present invention. The symbols used in the drawings indicate the following. 1.21...Bimetal electrode, 2.22a, 2
2b. 22C: Fixed electrode, 3.23: Insulating base, Ll * Ll * L S: Length of the arm of the bimetal electrode.

Claims (1)

[Claims] In a temperature-sensitive switch using bimetal, which is made by laminating two metal plates with different thermal coefficients, a base and a common base are mounted on the base, and the common base is attached to the sides of the base. A bimetal electrode in which a plurality of arm pieces of different lengths extend in parallel, and a plurality of fixed electrodes provided on a base corresponding to the tips of the respective arm pieces of the bimetal electrode. A multi-point temperature-sensitive switch characterized by being composed of: