JPS6359086B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a composite temperature sensing element used for detecting and controlling the temperature of a heating element.

When you want to detect the temperature of a heating element such as a heater, semiconductor, or radiator over several stages and control electronic equipment according to the temperature, you can use a sensing element such as a positive temperature coefficient thermistor or a negative coefficient thermistor to detect the temperature at each temperature. Detecting elements with different characteristics are attached to the heating element in order to correspond to the heat generation, and the heat is converted into a current signal and detected.

As shown in FIG. 1, the conventional detection element mounting method involves fitting a resin-molded detection element 3 with lead wires 2 and 2 into a lug terminal plate 1 and fixing the detection element 3 with adhesive. As shown in FIG. 2, they were each attached to the heating element 4 with screws 5 separately.

However, the method of installing the sensing elements separately takes time and effort to install, and each sensing element needs to be processed individually, which increases the overall cost, and each element is large. There is a problem that a large installation space is required.

This invention was made in order to solve the above-mentioned problems, and it is an object of the present invention to manufacture a composite temperature sensing element that can easily and compactly attach a plurality of sensing elements to a heating element and has excellent sensing ability. The purpose is to provide a manufacturing method that can.

The structure of the present invention is that a common terminal and a plurality of independent terminals are integrally formed by punching out a single metal plate, and a detection element is inserted and attached between the tip of each independent terminal and the common terminal. After the electrodes of the sensing element are connected with solder, the common terminal is glued onto an insulating substrate, and unnecessary parts of the metal plate are cut off to separate the independent terminal and the common terminal.

Embodiments of the present invention will be described below with reference to FIGS. 3 to 8 of the accompanying drawings.

First, as shown in FIG. 3, a thin conductive metal plate 11 preferably having elasticity is used, a plurality of long holes 12 are punched out in line with the metal plate 11, and a plurality of independent terminals 13 are inserted into one side. A slightly wider common terminal 14 is integrally formed at the end.

The free tip of each independent terminal 13 is connected to the common terminal 1.
A U-shaped notch 15 is provided in the common terminal 14 portion of the adjacent elongated hole 12 so as to enter the inside of the terminal 4 .

Next, a plurality of sensing elements 16 having different detection temperatures, such as a positive characteristic thermistor or a negative characteristic thermistor, are used.
A, 16b, and 16c are prepared, each detection element is inserted between the common terminal 14 and each independent terminal 13, and attached as shown in FIG.

Each detection element 16a, 16b, 16c is pressed onto the common terminal 14 by the elasticity of the independent terminal 13, and the common terminal 14 and the independent terminal 13 come into contact with the electrodes provided on both sides of the common terminal 14. The overlapping portions of the electrodes, common terminal 14, and independent terminals 13 are fixed by soldering.

Next, as shown in FIG. 5, the common terminal 14, the sensing elements 16a, 16b, 16c and the independent terminal 13
The laminated portion is immersed in an exterior resin such as an insulating resin, and before the exterior resin 17 hardens, the common terminal 14 is placed on a separately prepared insulating substrate 18, and the exterior resin 17 is used as an adhesive. It will stick.

Thereafter, unnecessary portions around the metal plate 11 are cut off as shown in FIG. 6, for example, so that the common terminal 14 and each independent terminal 13 are separated and independent.

The material of the insulating substrate 18 is not limited at all as long as the surface is insulated, such as alumina porcelain, a resin plate, a metal plate coated with an insulating coating, etc.

Furthermore, since the outer circumferential surfaces of the detection elements 16a, 16b, and 16c are covered with the exterior resin 17, the detection elements can be protected from the external environment and reliability is increased.

The completed composite temperature sensing element may be attached to the heating element 19 by stacking the insulating substrate 18 on the heating element 19 and fixing it by tightening screws 20, as shown in FIG. As shown in FIG. 8, a printed circuit board 21 is set approximately perpendicular to the surface of the heating element 19, and a common terminal 1 is connected to the printed circuit board 21.
4 and the independent terminals 13 may be used to press the insulating substrate 18 onto the heating element 19.

As described above, according to the present invention, a common terminal and a plurality of independent terminals are integrally formed on one metal plate,
A sensing element is inserted and installed between the free tip of each independent terminal and the common terminal, and after connecting the electrode of the sensing element and the terminal by soldering, the common terminal is glued onto the insulating substrate, and the metal plate By cutting out the unnecessary parts and separating the common terminal and independent terminal, it is now possible to attach the terminals to multiple sensing elements at once, and it is also possible to attach multiple sensing elements to the heating element at the same time. , easy to assemble,
Installation work can be done easily and efficiently.

In addition, since multiple sensing elements are attached to a common terminal, the whole can be made compact.
It is possible to downsize electronic devices.

Furthermore, since the terminals are formed from a single metal plate, the terminal pitch is accurate and can be easily inserted into a printed circuit board and installed on a heating element.
In addition, since the common terminal functions as a heat absorbing plate, heat is easily conducted to the sensing element, resulting in excellent sensing ability.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing a conventional composite temperature sensing element, Fig. 2 is a plan view showing how it is attached to the above heating element, and Figs. 3 to 6 each show the manufacturing method of the present invention. Each of the process diagrams, FIGS. 7 and 8 is a side view showing the state of attachment to the heating element. 11...Metal plate, 13...Independent terminal, 14...
Common terminal, 16a, 16b, 16c...Detection element, 17...Exterior resin, 18...Insulating substrate, 19
...Heating element.

Claims (1)

[Claims] 1. A common terminal and a plurality of independent terminals are integrally formed using a single metal plate, and a detection element is inserted and attached between the tip of each independent terminal and the common terminal for detection. A composite temperature sensing element characterized in that after the electrodes of the element and each terminal are connected with solder, the common terminal is adhesively fixed on an insulating substrate, and the independent terminal and the common terminal are separated by cutting off unnecessary parts of the metal plate. manufacturing method. 2. The common terminal is adhesively fixed onto the insulating substrate by applying a resin sheath to the common terminal, the sensing element, and the independent terminal, and stacking the common terminal on the insulating substrate before the resin sheath hardens. A method for manufacturing a composite temperature sensing element according to claim 1, characterized in that: