JPS58140936A - Temperature fuse - 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 temperature fuses.

Conventional temperature fuses are shown in Figures 1 to 4, and the one shown in Figure 1 is an easily fuseable fuse in which the terminal wire A heat-softening resin (3) for oxidation prevention is applied to the surface of the gold (1). and an insulating case with openings at both ends (
Store the easily fusible metal (1) in 4) and insulate the insulating paint (5) (5).
1, the opening of the insulating case (4) is sealed by casting. Temperature fuses manufactured in this way are difficult to position when storing the easily fusible metal (1) in the insulating case (4), and in order to overcome the fixing method using jigs, etc., the temperature fuse is continuously passed through to the next process. I can't. Furthermore, as shown in Figure 3, when the opening of the insulating case (4) is sealed by casting, etc., the insulating paint (51+51) flows too much onto the inner surface of the insulating case (4), causing the easily fusible metal (1) and the terminal wire to flow. +21 It may adhere to the connection part with +21. Figure 2 shows the state after the temperature fuse made as shown in Figure 1 is normally blown.

Figure 4 shows the state where the insulating paint (5) (5) has blown out the temperature fuse attached to the connection between the easily fusible metal (1) and the terminal wire +2) as shown in Figure 3. (1) Spheroidization is slow, and if the temperature does not rise above the specified temperature, molten PI)
There was a drawback that the easily fusible alloy (1) did not become completely spherical after melting, and the distance between the electrodes became short.

In this way, it is good for conventionally made temperature fuses.
The drawbacks were that the defects were uneven and the characteristics were not stable.

In order to solve this problem, the present invention is designed to provide a temperature fuse with excellent fusing characteristics without the occurrence of defective products such as soldering, and to fuse both ends of an easily fusible alloy that melts at a predetermined temperature or higher. Connecting a terminal wire to the part, covering the outer periphery of the easily fusible metal with a heat-softening resin having flux and adhesive properties, and storing the easily fusible metal part in an insulating case having openings at both ends;
Insert the terminal wire into a metal plate that has a terminal wire insertion hole in the center, press fit this metal plate into the insulating case near the connection between the terminal wire and the easily fusible metal, and fill the openings at both ends of the insulating case with an insulating material. The insulating material is sealed and brought into contact with the metal plate.

The present invention will be explained below based on drawings (FIGS. 5 to 9) showing embodiments. First, a first embodiment shown in FIGS. 5 and 6 will be described. In Figure E (Ill lct,
It is a thread-like easily fusible metal made of tin, lead, bismuth, indium, cadmium, or an alloy thereof, and terminal wires CL2Q2 are connected to both ends thereof. This resin a3
is made of flux, etc., and has flux properties and adhesive properties. a< is an insulating case made of glass, ceramic, etc. and having openings at both ends, into which the first fusible metal aυ coated with the thermosoftening resin 03 is inserted. 05 is a disk-shaped metal plate having a hole (15a) in the center through which the terminal JR, ■ is inserted, and whose outer diameter is slightly larger than the inner diameter of the case a. The easily fusible metal Oυ is held at a fixed position in the case 04 by fitting the a7J to the vicinity of the connecting portion with the easily fusible metal OD and press-fitting it into the openings at both ends of the case a. aQ is an insulating paint that seals the openings at both ends of the case (141), and this insulating paint 00 is in contact with the outer surface of the metal plate α9.

During manufacturing, the temperature fuse made in this manner fixes the insulating case (14) and the terminal wire a2 (12) connected to the easily fusible metal αυf with the metal plate Q5Q5. It can be easily positioned at the center of the case α4.Also, the paint aa aei is prevented from flowing into the part of the metal plate 090Q that easily gets stuck in the metal plate 090Q, and stable bath characteristics can be obtained.

By the way, the metal plate αQ may be a metal plate having an uneven portion α formed on the outer periphery as shown in FIG. 7, or a cap-shaped metal plate as shown in FIG. In addition, as shown in FIG. 9, by plating the inner surface of the metal plate 05 with a highly wettable metal or alloy q barrel, the metal plate Q5 can be easily melted when melting the easily melted metal 011.
(The speed of spheroidization can be accelerated to fli.

Since the temperature fuse of the present invention can be implemented as described below, there is no variation in blowout, and since a sufficient distance can be maintained between the electrodes, the performance can be greatly improved. In addition, since the metal plate is press-fitted into the case with the easy-to-melt metal inserted into the case and the insulating material is applied after the easy-to-fuse metal is fixed, the easy-to-fusible metal can be positioned more easily than in the past. It can be mass-produced at low cost.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing a conventional example, Fig. 2 is a sectional view of the conventional example shown in Fig. 1 after fusing, Fig. 8 is a sectional view showing another conventional example, and Fig. 4 is similar to Fig. 3. FIG. 5 is a sectional view showing the first embodiment of the present invention, and FIG.
FIG. 7 is a perspective view of a metal plate in another embodiment 1 of the present invention, and FIGS. A perspective view and a sectional view of a metal plate in an embodiment, and FIG. 9 is a sectional view showing still another embodiment of the present invention. 0°C...Easily fused metal, ■...Terminal wire, 03...Thermosoftening resin, α4...Insulating case, Qf9...Metal plate, (15a)...Insertion hole, αG・...Insulating paint, α...Irregularities, (G)...Metal or alloy agent Yoshihiro Morimoto Figure 1 Figure 3 Figure 4 Figure 7 Figure 3

Claims (1)

[Claims] 1. Terminal wires are connected to both ends of an easily fusible metal that can be melted and cut with a predetermined temperature tool, and the outer periphery of the easily fusible metal is covered with a heat-softening resin having flux and adhesive properties; The easily fusible metal part is housed in an insulating case that has openings at both ends, and the terminal wire is inserted through a metal plate having a terminal wire insertion hole in the center, and this metal plate is inserted near the connection area between the terminal wire and the easily fusible metal. A temperature fuse is press-fitted into an insulating case, the openings at both ends of the insulating case are sealed with an insulating material, and the insulating material is brought into contact with the metal plate. 2. Claim 1 in which unevenness is formed on the outer periphery of the metal plate
Humidity fuse as described in section. 8. The temperature fuse according to claim 1, which is plated on the inner surface of a metal plate.