JPS6114120Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a polarized electromagnetic relay.

Figure 1 shows a conventional polarized electromagnetic relay.
L-shaped magnetic poles 2 and 2' are attached to the inner surfaces of both sides of the U-shaped yoke 1, respectively.
A permanent magnet 3 is fixed to the lower side of the upper side of 2',
A column 4 is fixed to the center of the upper surface of the permanent magnet 3,
An amateur 5 is rotatably attached to the upper part of the support 4. Further, a coil 6 is wound around the yoke 1 described above. The operating characteristics of the polarized relay having such a structure are shown in FIG. 2, where curve A shows the case of non-excitation, curve B shows the case of forward excitation, and curve C shows the case of reverse excitation. As shown in the figure, the structure shown in Figure 1 provides a symmetrical magnetic absorption force and is suitable for realizing a latching type relay, but it is easy to match with a spring load to realize a single type relay. In order to achieve this, it is necessary to achieve an imbalance in absorption capacity.

The present invention aims to improve the above-mentioned drawbacks and provide a single-type polarized electromagnetic relay that can be easily constructed.

Next, to explain the present invention with reference to the drawings, in Fig. 3, 1 is a yoke, 2, 2 are magnetic poles, 3 is a permanent magnet, 4 is a column, 5 is an armature, and 6 is a coil, which is different in configuration from Fig. 1. The point is that an extension 1a is formed at one end of the yoke 1, and this extension extends close to the end of the armature 5.

With this configuration, amateur 5
Let the magnetic flux flowing between the NC side of the armature 5 and the magnetic pole 2' be _φ2 , and the NO side of the armature 5 and the extension part 1a of the yoke.
Let φ ₁ be the magnetic flux flowing between the magnetic pole 2 and φ ₁ ′, and the magnetic flux φ ₂ ≒ φ ₁ + φ _{1 ′} . , the relationship between the amount of magnetic flux that contributes to the attractive force acting on each magnetic pole is φ ₂ > φ ₁ ', and the NC side of the armature is attracted to the magnetic pole 2' side, achieving imbalance in the attractive force. It is possible to configure a so-called single-type polarized relay.

Figures 4A and 4B show specific examples of the polarized relay constructed as described above. In the figure, 7 is a movable contact piece, 8 is a fixed contact, 9 is a terminal group, and 10 is a case. FIG. 5 shows the operating characteristics of the polarized relay of the present invention, where curve A shows the attractive force in the non-excited state and curve D shows the attractive force in the energized state.

Further, in the same figure, point a indicates the suction force acting on the armature 5 at the position of FIG. 3.

FIG. 6 is a composite diagram of the attraction force of the armature 5 and the spring load characteristics of the NC contact spring and the NO spring, where curve A shows the attraction force in the case of non-excitation, and curve D shows the attraction force in the case of excitation. As is clear from this figure, the third
In the figure, when the coil 6 is excited so that the N pole on the magnetic pole 2 side and the S pole on the magnetic pole 2' side, the attractive force on the NC side, that is, the magnetic pole 2' and the left end of the armature 5, as shown in FIG. The flowing magnetic flux is canceled out,
The attraction force on the NO side, that is, the magnetic flux flowing to the right end of the magnetic pole 2 and the armature 5 is increased, and the D
As a result, the right end of the armature 5 overcomes the spring load and is attracted to the magnetic pole 2.

As mentioned above, the present invention makes the lengths of the normally closed and normally open sides of the U-shaped yoke unbalanced, and allows leakage magnetic flux (magnetic flux that does not contribute to the attractive force) to flow from the armature to the yoke on the normally open side. By configuring this structure, it is possible to unbalance the attraction force, and it has the effect of making it easier to realize a single type relay in a polarized relay.

[Brief explanation of the drawing]

Figure 1 shows the conventional polarized relay, Figure 2 shows its operating characteristics, Figure 3 shows the polarized relay of the present invention, and Figure 4
B shows an actual example, B shows A- in B.
A sectional view taken along line A', FIGS. 5 and 6 show its operating characteristics, and FIG. 7 shows an explanatory diagram of its operation. 1... Yoke, 1a... Extension part, 2, 2'...
Magnetic pole, 3... Permanent magnet, 4... Pillar, 5... Armature, 6... Coil, 7... Movable contact piece, 8...
Fixed contact, 9... terminal group, 10... case.

Claims (1)

[Scope of utility model registration request] L-shaped magnetic poles 2 and 2' are attached to the inside of both ends of a U-shaped yoke 1 formed by winding a coil 6, and the upper sides of the L-shaped magnetic poles 2 and 2' are arranged so as to face each other. At the same time, a permanent magnet 3 is disposed so as to be in contact with the lower side of the upper side of the magnetic poles 2, 2', and both ends thereof are in contact with the inside of the L-shaped magnetic poles 2, 2', respectively. The poles are configured such that the same pole is arranged in the center and the different pole is arranged in the center, and a pole 4 is erected in the center of the permanent magnet, and an armature 5 is swingably arranged on the pole 4. A polarized electromagnetic relay characterized in that only one end of the yoke 1 is extended so as to face one end of the armature 5.