JPS63886B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a polarized electromagnetic relay. Conventionally, as shown in FIG. 1, this type of polarized electromagnetic relay has two yokes 2 and 2' of the same shape arranged symmetrically with a permanent magnet 1 in between, and the ends of the yokes serve as magnetic poles. A structure has been proposed in which an armature 3 is rotatably supported in the central portion a, and a coil 4 is wound around the armature. In the above magnetic circuit configuration, a symmetrical attractive force acts on the armature, so a latching type relay can be easily developed, but in order to develop a single type relay, it is necessary to This has the disadvantage that it is difficult to achieve an unbalanced suction force. FIG. 2 shows attractive force curves, where curve A shows the case of no excitation, curve B shows the case of forward excitation, and curve C shows the case of reverse excitation. The present invention has been proposed in order to improve the above-mentioned drawbacks, and is intended to provide a polarized relay that can be freely developed as a latching type relay or a single type relay. Next, embodiments of the present invention will be described with reference to the drawings. Fig. 3 shows an example of a latching type structure.
A permanent magnet 14 is arranged on the lower surface of the yoke so as to bridge the yokes 12 and 13, and the lower end of the armature 11 is rotatably supported at 15. It is arranged so that a gap is provided between the upper end and the upper ends of the yokes 12 and 13, and an equal gap is provided between the lower end of the armature 11 and the lower ends of the yokes 12 and 13. 16 indicates a coil provided on the armature. Furthermore, a contact (not shown) is provided which is turned on and off by rotation of the armature. With the above configuration, fixed magnetic resistance can be achieved by making two of the four fixed gaps fixed, and the armature is supported at a position where the magnetic resistance of these two fixed gaps is equal. In this case, the attraction force is obtained symmetrically and a latching type relay is obtained. Figure 4 shows the attraction force curves, where curve A is non-excitation, curve B is positive excitation, and curve C is
indicates the case of reverse excitation. FIG. 5 shows another embodiment, and the difference between this embodiment and the embodiment shown in FIG.
This is the point where the support point 15' of No. 1 is shifted to the left. The lower end of amateur 11 and yokes 12 and 13
By arranging the armature so that the magnetic resistance between the armature 11 and the lower end is different, an unbalanced attractive force will act between the upper end of the armature 11 and the upper ends of the yokes 12 and 13, making it difficult to use a single type relay. I can get it. FIG. 6 shows the attractive force characteristics in the case shown in FIG. 5, where curve A' shows the case of non-excitation, and curve B' shows the case of non-excitation. FIG. 7 shows a perspective view of a specific embodiment of the present invention, in which 11 is an armature, 17 is a movable contact, 1
8 is a coil block, into which an armature 11 is inserted. Fixed contacts 19 and 19' are attached to an opening at one end of the coil block. 12,
A yoke 13 is integrally connected to a synthetic resin base 20, and a permanent magnet 14 is placed on the base 20. The yoke is placed on both sides of the coil block 18 . 21 indicates a case. 22, 22' indicate terminals. FIG. 8 shows an assembled view, in which A shows a top view with the case 21 removed, and B shows a side view. In the figure, the same reference numerals as in FIG. 7 indicate the same things. As described above, the present invention includes a four-gap magnetic circuit,
By using a two-gap magnetic circuit configuration in which the remaining two gaps are used as fixed magnetic resistances, if you want to obtain a symmetrical attractive force, make the two fixed magnetic resistances equal to obtain an asymmetrical attractive force. This can be achieved by providing a magnetic resistance different from that in the case. This makes it easy to obtain a latching type relay or a single type relay, which can be achieved in any magnetic circuit currently used as a four-gap circuit, by changing the shape and number of parts. Latching type relays and single type relays can be easily developed.

[Brief explanation of the drawing]

Figure 1 shows a conventional polarized electromagnetic relay, Figures 3 and 5 show the polarized electromagnetic relay of the present invention, Figures 2, 4 and 6 show attractive force characteristics, respectively. Figures A and B show specific embodiments of the present invention. 11...Amateur, 12,13...York,
14... Permanent magnet, 15... Support point, 16... Coil, 17... Movable contact, 18 ... Coil block, 19, 19'... Fixed contact, 20... Stand, 2
1...Case, 22, 22'...Terminal.

Claims (1)

[Claims] 1. A pair of approximately U-shaped yokes are arranged facing each other at both ends of each yoke with a predetermined spacing between them, and a permanent magnet is arranged so as to bridge the yokes, and an excitation coil is arranged. The lower part of the armature having the above-mentioned armature is rotatably supported within the cavity formed between the lower ends of the respective yokes, and the upper part of the armature is supported within the cavity formed between the upper ends of the respective yokes. A polarized relay characterized by being placed in