JPS5852286B2 - polarized relay - Google Patents

Description

Detailed Description of the Invention The purpose of the present invention is to prevent the magnetic field of the contact part of the beam V- from moving the arc and annealing and deforming the operating spring by crossing the operating direction of the contact. To describe the embodiment shown in FIGS. 1 to 6, there is an armature in which the central parts of two magnetic bars 1 are connected by a permanent magnet 2, and one of the magnetic bars is magnetized as an N pole and the other as an S pole. A is rotatably supported 10,
Both ends 4 of the yoke B wound with the excitation coil/1/3 are placed between the tips of the two magnetic rods 1 of the armature A, and protruded from the outer surface of the tip of each magnetic rod 1. The rib 5 presses the movable contact spring plate 7 to separate the movable contact 6 from the fixed contact 8, so that the magnetic field near both contacts 6 and 8 is as parallel as possible to the operating direction of the movable contact 6. both contacts 6 and 8
This is a polarized relay in which a compensating permanent magnet 9 is disposed adjacent to the magnet.

In the figure, reference numeral 11 denotes a molded body that constitutes an armature by fitting two magnetic rods 1 and two permanent magnets 2, and a rib 5 is integrally molded.

12 is a body, and 13 is a case cover.

FIG. 2 is a simplified explanatory diagram showing the operating state of the polarized/no according to the present invention. When current is applied to the coil 3 in one direction and the tip 4 of the yoke B is magnetized to the polarity shown in FIG. , Amateur A is aspirated as shown in the figure.

Even if the current of /1/3 is lost, the armature A is held in the state shown in figure a by the attractive force of the permanent magnet 2.

Next, when a current is passed through Koi/I/3 in the opposite direction to the above,
Yoke 4 is magnetized with the opposite polarity to that shown in the figure, so it is amateur A.
rotates in the direction of the arrow to open and close the contacts 6 and 8, thereby self-holding.

FIG. 3 shows the positional relationship between the leakage magnetic field and the contacts 6 and 8 during the operation of the armature. If there is no permanent magnet 9 for arc transition compensation as shown in FIG. 5 or 6, Since the direction of the magnetic field lines and the operating direction of the movable contact 6 are not parallel, and the arc current crosses the magnetic field, the arc current (thick arrow) receives a force perpendicular to the plane of the paper in Fig. 3, and the polarity of the opposing magnetic pole 1 changes. Accordingly, the transition occurs as shown by the dotted arrow in FIG.

In other words, the arc current does not flow between the contacts 6 and 8, but instead flows through the terminal plate 1.
4 and the spring plate 7, and the heat damages the terminal plate 14 or anneales the spring plate 7, causing it to deform or break.

The permanent magnet 9 shown in FIGS. 5 and 6 is used to compensate for the above-mentioned transition of the arc, and as shown in the figure, the magnetic field produced by the compensating permanent magnet 9 coincides with the operating direction of the contact point of the magnetic field produced by the magnetic pole 1. are arranged so as to cancel the orthogonal components of , so that the combined magnetic field is approximately parallel to the direction of operation of the contact 6, and the arc current is not forced across the magnetic field.

The compensating permanent magnet 9 is fixed to the body 12 or is attached to the cover 13.
It can be fixed by embedding it in.

As described above, according to the present invention, it is possible to prevent arc transfer with an extremely simple structure, and since no damage is caused to components other than the contact portion, there is an advantage that the electrical life of the relay can be extended.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the polarized relay according to the present invention, and FIG. 2 is a simplified diagram explaining the operation of the same, in which a is a top view, b is a partially cutaway perspective view, and FIGS. Figure 6 is a simplified diagram explaining the principle, Figure 3 is a front view, Figure 4 is a side view of main parts,
FIG. 5 is a partial front view, and FIG. 6 is a partial front view of another embodiment. 1...Magnetic bar, 2...Permanent magnet, 3
... Coil, 4 ... Tip of yoke,
5...Rib, 6...Movable contact, 7...
...Movable contact spring plate, 8...Fixed contact, 9
......Permanent magnet for compensation, 10...Rotation axis, A...Amateur, B...Yoke.

Claims (1)

[Claims] An armature consisting of 12 magnetic rods connected in the center with a permanent magnet, one magnetic rod magnetized to the north pole and the other to the south pole, is rotatably supported, and an excitation coil is wound around it. Both ends of the yoke are placed between the tips of the two magnetic bars of the armature, and the movable contact spring plate is pressed by the ribs protruding from the outer surface of the tips of each magnetic bar to fix the movable contact. The compensating permanent magnets are arranged close to both contacts, so that the composite magnetic field near both contacts caused by the armature permanent magnet and the compensating permanent magnet is almost parallel to the operating direction of the movable contact. A polarized relay characterized by the following characteristics: