JPS60206107A - Thermistor - 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 the improvement of a high-precision thermistor used in temperature sensors for air conditioners, electronic jars, and the like.

Configuration of a conventional example and its problems Hereinafter, a thermistor used in a conventional temperature sensor will be explained with reference to the drawings.

FIG. 1 is a side view of a conventional thermistor, and FIG. 2 is a sectional view thereof. Reference numeral 1 denotes a thermistor element. After applying conductive paste to the entire surface and baking it, metal caps 3 with l)-do wires are press-fitted from both ends to make pressure contact with the conductive paste, and complete electrical conduction is achieved. The conductive paste is peeled off from the center of the thermistor constructed in this manner and the resistance value is adjusted to a desired value. 2 is a conductive paste whose central portion has been peeled off.

In the above configuration, the resistance value of the thermistor is determined by the distance between the two divided conductive pastes.

However, when adjusting the distance between conductive pastes,
Because it is peeled off with conductive paste, sandbunst, etc.
Since frictional heat is generated, it is not easy to maintain a constant resistance value.

Furthermore, since the electrodes are present on the surface of the thermistor element, there is a drawback that current flows through the surface of the thermistor element, making it susceptible to deterioration.

Purpose of the Invention In view of the above-mentioned drawbacks, the present invention provides a method in which frictional heat is not generated when adjusting the resistance value, the resistance value can be kept constant, and the conductive paste does not come into contact with the external atmosphere. The aim is to provide a thermistor that is highly accurate and reliable due to its excellent weather resistance.

Structure of the Invention To achieve this object, the thermistor of the present invention has a thermistor element provided with a screw on its surface, a metal cap with a lead wire provided with internal screws attached to both ends of the thermistor element, and a metal cap with a lead wire provided with an internal screw. A conductive paste is applied to the joint between the internal screw and the screw on the surface of the thermistor element.

With this configuration, frictional heat is not generated when determining the resistance value, making it possible to increase the accuracy of the resistance value, and since current flows inside, there is no possibility of deterioration, resulting in a highly reliable thermistor. This means that you can do it.

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

FIG. 3 is a side view of a thermistor according to an embodiment of the present invention, and FIG. 4 is a sectional view thereof. 4 is a thermistor element, and a screw 4a (iz) is provided on the surface.

5 is a conductive paste, and 6 is a metal cap with a lead wire having a screw 62Li inside. Then, a conductive paste 5 is applied to the inside of the cap 6 with a lead wire, and the cap 6 is attached and fixed to one end of the thermistor element 4.

Next, from the other end, conductive paste 5 is applied inside the lead wire cap 6, which is tightened while measuring the entire resistance value, and when a desired resistance value is obtained, the lead wire cap 6 is fixed. do.

As described above, according to this embodiment, a screw is provided on the surface of the thermistor element, a metal cap with a lead wire that has an internal screw is used to take out the electrode, and a conductive material is used as the bonding material between the thermistor element and the metal cap with a lead wire. By using pastera, it is possible to maintain a constant resistance value and provide a highly accurate and reliable thermistor.

Effects of the Invention As described above, the present invention provides a screw on the surface of the thermistor element, attaches a metal cap with a lead wire and screws inside to both ends of the thermistor, pulls this out as a lead wire, and connects the thermistor element with a metal cap with a lead wire. By fully using conductive paste at the joint between the cap and the thermistor element, the resistance value of the thermistor can be kept constant and a highly reliable thermistor that is resistant to deterioration can be obtained, which has great practical effects.

[Brief explanation of the drawing]

FIG. 1 is a side view of a conventional thermistor 4), FIG. 2 is a sectional view thereof, FIG. 3 is a side view showing an embodiment of the thermistor according to the present invention, and FIG. 4 is a sectional view thereof. 4... Thermistor element with screw, 4a... Screw, 6... Conductive paste, 6... Metal cap with lead wire, 6a... Screw. Name of agent: Patent attorney Toshio Nakao and 1 other person
1 figure

Claims (1)

[Claims] A screw is provided on the surface of the thermistor element, a cap with a lead wire provided with an internal screw is attached to both ends of this thermistor element, and a conductive wire is installed at the joint between the screw inside the cap with a lead wire and the screw on the surface of the thermistor element. A thermistor coated with a chemical paste.