JPS5852285B2 - polarized relay - Google Patents

Description

[Detailed Description of the Invention] The present invention prevents the arc generated between the polarized and negative contacts from moving outside the contact area due to the influence of leakage magnetic flux and deforming or damaging the movable contact spring plate due to heat. The purpose is to

The configuration of the polarized relay according to the present invention will be described with reference to FIG. 1. Two magnetic bars 1 are connected in the center with a permanent magnet 2, and one of the magnetic bars is magnetized as an N pole and the other as an S pole. An armature A is rotatably supported on a shaft 10, and both ends 4 of a yoke B around which an excitation coil 3 is wound are placed between the tips of two magnetic rods 1 of the armature A. A rib 5 protruding outward from the tip of the body rod 1 presses the movable contact spring plate 7 to separate the movable contact 6 from the fixed contact 8. A magnetic plate 9 is placed on the opposite side of the body rod 1.
It is constructed by arranging.

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 therein.

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 in the coil 3 disappears, 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 the coil 3 in the opposite direction to the above, the yoke 4 is magnetized with the opposite polarity as shown in the figure, so the armature A rotates in the direction of the arrow to open and close the contacts 6 and 8 and self-hold. That's what I do.

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 magnetic bar 9 as shown in FIG.
Since the operating directions of are not parallel and the arc current crosses the magnetic field, the arc current (thick arrow) receives a force in the direction perpendicular to the plane of the paper in Figure 3, and depending on the polarity of the opposing magnetic pole 1, the arc current (thick arrow) is applied by the dotted line in Figure 4. The transition will occur as shown by the arrow.

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.

In FIG. 5, a magnetic plate 9 is provided to solve the above problem, and is disposed on the opposite side of the magnetic bar 1 in close proximity to both contacts 6 and 8. Since the magnetic flux passing nearby passes through the magnetic plate 9 with low magnetic resistance, the direction of the magnetic lines of force and the operating direction of the movable contact 6 are parallel, no force acts on the arc current, and arc migration can be prevented.

The magnetic plate 9 may be provided upright on the body 12 as shown in FIG. 5, or may be embedded in the case cover 13 as shown in FIG.

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 5 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. 1...Magnetic rod, 2...Permanent magnet, 3
... Coil, 4 ... Tip of yoke,
5...--Rib, 6...Movable contact, 7...
...Movable contact spring plate, 8...Fixed contact, 9
...Magnetic plate, 10...Rotation axis, A.
...Amateur, B...York.

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 rods of the armature, and the movable contact is pressed against the movable contact baffle plate by the ribs bored on the outer surface of the tip of each magnetic rod. A polarized wire 0 characterized in that a magnetic plate is disposed on the opposite side of a magnetic bar in close proximity to both contacts so as to be separated from a fixed contact.