JPS593462Y2 - electrical contact strip material - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to improvements in electrical contact strips.

Conventionally, electrical contacts made of silver-based composite materials have been widely used in relays, switches, etc. as medium-load and heavy-load electrical contacts.

However, as shown in FIG. 1, this silver-based composite electrical contact is coated with silver 2 on one side of the silver-based composite contact material 1 in advance in order to facilitate bonding with the base metal pedestal 3, but during use, the silver-based composite electrical contact There was a drawback that the contact material 1 could be rolled up or peeled off from the interface with the silver 2.

As a result of intensive research to eliminate the above drawbacks, the inventor of the present invention has discovered that by coating at least three long surfaces of the silver-based composite strip with silver or silver alloy, the silver-based composite contact material can be made of silver or silver. They devised an electrical contact strip that reliably prevents peeling from the alloy interface.

Below, the electrical contact strip material according to the present invention will be explained with reference to the drawings. Figures 2 to 6 show an electrical contact strip material in which silver or silver alloy 2' is coated on three or four long surfaces of the silver-base composite strip material 1'. It is a contact strip material.

Figure 7 shows the electrical contact strip material in Figure 2 as a base metal strip base material 3'.
Fig. 8 shows the strip plate shown in Fig. 7 cut to an appropriate length, or the electrical contact strip material shown in Fig. 2 cut to an appropriate length. This is an electric contact obtained by brazing to a base metal base 3.

When such an electrical contact is used as an electrical contact, unlike conventional products, it never peels off from the interface 4 of the silver-based composite contact material 1 (silver or silver alloy 2').

Silver or silver alloy 2' is also applied to the side surface 5 of the silver-based composite contact material 1.
This is because the silver-based composite contact material 1 is more firmly fixed.

As is clear from the above, the electrical contact strip material according to the present invention can reliably prevent the silver-based composite contact material from peeling off from the interface covered with silver or silver alloy, and can also be bonded to base metal materials to form an inlay. When making mold strips, the electrical contact strip material of the present invention is coated with silver or silver alloy on its sides, so it is easier to bond to base metal materials than conventional silver composite materials, so it can be used to form strong silver-based composite contacts. It has the advantage of being able to easily create inlay-type electrical contacts made of fixed materials.

[Brief explanation of the drawing]

Figure 1 is a perspective view of an electrical contact made of a conventional silver composite contact material, Figures 2 to 6 are perspective views of electrical contact strips according to the present invention, and Figure 7 is a perspective view of the electrical contact strip of Figure 2. FIG. 8 is a perspective view of an electrical contact made using the electrical contact strip material shown in FIG. 2; FIG. 1...Silver-based composite contact material, 1'...Silver-based composite strip material, 2...Silver, 2'...Silver or silver alloy, 3 ...Pedestal, 3'...Base material,
4: Interface between the silver composite contact material and silver or silver alloy, 5: Side surface of the silver-based composite contact material.

Claims (1)

[Scope of utility model registration request] An electrical contact strip material comprising a silver-based composite strip material, wherein at least three of its elongated surfaces are coated with silver or a silver alloy.