JPS6348170B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an organic electromagnet used in an electromagnetic relay.

With the miniaturization and lower power consumption of electromagnetic relays,
Polarized electromagnets with small size and low power consumption are becoming desirable.

However, the conventional one is, for example, 16635
As shown in the publication, since a C-shaped iron core is used, the armature and coil are stacked on top of each other, increasing the height dimension and increasing the overall volume when trying to secure a sufficient suction area. becomes larger, and the electromagnet becomes larger.

An object of the present invention is to provide a polarized electromagnet that is thin, has a sufficiently large attraction area, and has good magnetic efficiency.

An embodiment of the present invention will be described below with reference to the drawings. In FIGS. 1 and 2, a coil 2 is wound around the central portion 1c of a substantially H-shaped core 1 obtained by punching or the like from a plate-shaped magnetic material, and the front and rear portions thereof serve as adsorption portions 1a and 1b. On the other hand, four substantially U-shaped armatures 3 to 6 are formed by punching or the like from a plate-shaped magnetic material. Amachiyua 3-6
are the front end suction parts 3a to 6a and the rear end suction part 3, respectively.
b to 6b, and the suction portions at both ends are connected by connecting portions 3c to 6c located at the side portions. And suction parts 3a, 4a and suction parts 5a, 6
a to sandwich the suction part 1a of the core 1 above and below, and the suction parts 3b, 4b and the suction part 5b,
The armatures 3 to 6 are arranged above and below the core 1 so that the suction portion 1b of the core 1 is sandwiched between the two armatures 6b and 6b. The upper and lower armatures 3, 5 and 4, 6 have permanent magnets 71, 72 at their connecting parts 3c to 6c.
are connected. The permanent magnets 71 and 72 are magnetized in the same direction, for example, as shown in the figure, with the north pole at the top. Although not shown, these armatures 3 to 6 and permanent magnets 71 and 72 are integrated with a non-magnetic material such as plastic, and are held rotatably about an axis O-O that is substantially perpendicular to the axis of the coil 2. .

Next, the operation will be explained with reference to FIGS. 3A and 3B. First of all, when the coil 2 is de-energized, the armatures 3 to 6 are in a state of rotation in the direction A, and the attraction parts 3b, 4b and 5a, 6 of the armatures are rotated in the direction A.
It is assumed that the core 1 is attracted to the attraction parts 1a and 1b of the core 1, respectively, as shown in FIG. 3A.
At this time, the magnetic fluxes of the permanent magnets 71 and 72 are flowing in the same direction within the center portion 1c of the core 1, as shown in the figure. In this state, the coil 2 is energized to magnetize the core 1, so that the front end attraction part 1a becomes the S pole and the rear end attraction part 1a becomes the S pole.
Make sure that b becomes the north pole. Then, the suction parts that had been adsorbing each other become repulsive, and the suction parts that were previously separated become attracted to each other. Therefore, it rotates in the direction B, resulting in the state shown in FIG. 3B. At this time, as shown in the figure, the permanent magnetic flux 7
The magnetic fluxes 1 and 72 flow in the central portion 1c of the core 1 in the opposite direction to that shown in FIG. 3A. Therefore, even if the excitation of the coil 2 is stopped, this state is maintained. If a current is applied to the coil 2 in the opposite direction so that the front end attraction part 1a becomes the north pole and the rear end attraction part 1b becomes the south pole, the state shown in FIG. 3A is returned in the same manner as above, and this The state is maintained even after the excitation of the coil 2 ends. A latching operation is thus performed.

Note that two coils may be wound around the central portion 1c of the core 1 so as to generate magnetic flux in opposite directions.

In the above embodiment, four approximately U-shaped armatures 3 to 6 are used, but as shown in FIG.
and 6b can be connected integrally, so that the upper and lower armatures can be formed into a substantially square shape as shown in FIG.

The embodiments shown in FIGS. 1, 2, and 4 are all of the latching type, but if a single stable type is used, the configuration shown in FIG. 5 or 6, or Figures 5 and 6
A configuration that combines figures may be used. That is, in FIG. 5, the front end suction parts 3a, 4 of the upper armature
The area of the rear end suction parts 5b, 6b of the lower armature is larger than the area of the rear end suction parts 3b, 4b of the upper armature and the front end suction parts 5a, 6a of the lower armature. The attraction force is made weaker than the attraction force on the side with the larger area so that when the coil 2 is de-energized, it is always attracted towards the side with the larger area, and the side with the larger area is set as the return side and the side with the smaller area is set as the operating side. There is. 6th
In the figure, thin plate-shaped residial plates 8a and 8b made of a non-magnetic material are fixed to the lower surface of the front end adsorption part 1a and the upper surface of the rear end adsorption part 1b of the core 1 by welding or the like. , 8b are fixed, so that the suction force on the side to which they are fixed is weaker than the suction force on the side to which they are not fixed, so as to distinguish between the operating side and the return side. In addition, this residial plate 8
a and 8b may be attached to the amateur side.

As described above with respect to the embodiments, in the polarized electromagnet of the present invention, a coil is wound around the center of the H-shaped core, and permanent magnets are located on both sides of the coil. The connecting portions are connected together to form an armature. Therefore,
Coils and amateurs do not stack up,
Can be made thinner. Furthermore, since the entire leg portions of the H-shaped core can be used as adsorption portions, magnetic efficiency can be improved.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an embodiment of the present invention, FIG. 2 is an exploded perspective view of FIG. 1, FIGS. 3A and B are schematic diagrams for explaining the operation of FIG. 1, and FIG. FIGS. 5 and 6 are exploded perspective views showing other embodiments, respectively. 1...Approximately H-shaped core, 2...Coil, 3-6...
...Amateur, 71, 72...Permanent magnet, 8a~
8b...Residial plate.

Claims (1)

[Claims] 1. A coil is wound around the center of a substantially H-shaped core, and its front and rear ends are used as suction parts.The suction parts are connected to connecting parts on both sides. Arranging the connected amateurs above and below the core,
The upper and lower armatures are connected by making the attracting parts of the armature sandwich the attracting part of the core, and connecting the connecting parts of both arms with permanent magnets magnetized in the same direction. A polar electromagnet that is rotatably held around a substantially right-angled axis. 2. A patent claim in which the area of the front end suction part of the upper armature and the rear end suction part of the lower armature is changed with respect to the area of the rear end suction part of the upper armature and the front end suction part of the lower armature. A polarized electromagnet according to item 1. 3. A patent claim in which a non-magnetic material is arranged between the rear end suction part of the upper armature and the rear end suction part of the core, and between the front end suction part of the lower armature and the front end suction part of the core. A polarized electromagnet according to item 1.