JPH05243038A - Polar electromagnet - Google Patents

Abstract

PURPOSE:To make the operating characteristic of an armature invariable substantially even when the direction of fitting is changed. CONSTITUTION:The title electromagnet is so constructed as to have a pair of yokes 1 and 2 having opposite-end magnetic pole parts 1a and 1b, and 2a and 2b, disposed in parallel so that they are opposed to each other, a permanent magnet 3 of which the direction of magnetization is held between the paired yokes 1 and 2, a coil 4 wound on the virtually central part of the paired yokes 1 and 2 with a coil frame 4a interposed, and an armature 6 of which the central part 6a is supported rotatably by the center 5d of a supporting groove 5c of a supporting frame 5 and rotates when the coil 4 is excited in a specified direction and of which the opposite-end parts 6b and 6c are attracted alternately by either the opposite-end magnetic pole parts 1a and 1b, or 2a and 2b, of the paired yokes 1 and 2 respectively. Accordingly, the permanent magnet 3 is not disposed on the armature 6 and the armature is a single body and light in weight. When the central part 6a is supported and rotates, the operating characteristic of the armature 6 is invariable substantially even when the direction of fitting thereof is changed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary polarized electromagnet used for a polarized relay or the like.

[0002]

2. Description of the Related Art Heretofore, as a polarized electromagnet of this type, there has been one in which an armature provided with a permanent magnet is rotatably supported with its center portion rotatably supported.

[0003]

In the conventional rotary type electromagnet of the above-mentioned type, since the armature is provided with the permanent magnet and the weight thereof is heavy, the central portion is rotated. When the armature is freely supported and rotates, the weight of the permanent magnet may be added or subtracted depending on the mounting direction, and the operating characteristics of the armature may change significantly.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a rotary polarized electromagnet whose operating characteristics of the armature hardly change even when the mounting direction is changed. It is in.

[0005]

In order to solve the above-mentioned problems, a polarized electromagnet of the present invention has a pair of yokes arranged in parallel so that magnetic pole portions at both ends face each other, and a pair of yokes attached to the pair of yokes. Permanent magnets sandwiching the magnetic direction, a coil wound around the center of a pair of yokes, and when the coil is excited in the specified direction, the center is rotatably supported and rotates, and both ends are paired. And the armature that is alternately attracted to one of the magnetic pole portions on both ends of the yoke.

[0006]

According to the polarized electromagnet of the present invention, the permanent magnet is sandwiched between the pair of yokes instead of being disposed in the armature as in the conventional example, so that the armature is different from the conventional example. In contrast, the weight of the permanent magnet does not add to the weight, so it becomes lighter by itself, so when the central part is rotatably supported and it rotates,
Even if the mounting direction is different, the operating characteristics of the armature do not easily change.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS.

Reference numerals 1 and 2 are a pair of yokes, which are made of a magnetic material.
The flat plate is formed in a U shape, and magnetic pole portions 1a, 1b and 2a, 2b at both ends are arranged in parallel so as to face each other.

Reference numeral 3 denotes a permanent magnet which is sandwiched between the central pieces 1c and 2c of the pair of yokes 1 and 2 in the magnetizing direction, that is, the N pole is on one yoke 1 side and the S pole is on the other yoke 2 side. Abuttingly arranged.

Reference numeral 4 denotes a coil, which is wound around a coil frame 4a surrounding the central pieces 1c and 2c, which are substantially central portions of the pair of yokes 1 and 2, together with the permanent magnet 3.

Reference numeral 5 denotes a support frame, which is an insulating portion 5a made of an insulating material.
And a supporting portion 5b. The insulating portion 5a has a U-shaped cross section and is inserted and attached so as to cover the coil 4 from three directions. The supporting portion 5b is provided with a supporting groove 5c penetrating in the axial direction of the coil 4 and is connected to the outside of the central surface of the insulating portion 5a.
The center 5d is formed to have the same dimension as the plate thickness of the armature 6 described later and is made the narrowest, and widens toward the opening direction at both ends.

Reference numeral 6 denotes an armature, which is made of a magnetic material and is formed in a flat bar shape. The armature 6 is fitted to the support frame 5 so that the plate thickness direction of the central portion 6a is located at the center 5d of the supporting groove 5c, so that the central portion 6a can be freely rotated to the center 5d of the supporting groove 5c. Both ends 6b and 6c are supported and rotated, and the two ends 6b and 6c
The two opposite magnetic pole portions 1a, 2a and 1b, 2b facing each other can be alternately attracted.

Next, the operation will be described. First, as shown in FIG. 2, when the coil 4 is excited in the specified direction so that the opposite magnetic pole portions 1a, 2a and 1b, 2b of the pair of yokes 1, 2 become the N pole and the S pole, respectively. , The magnetic flux of the coil 4 and the magnetic flux of the permanent magnet 3 sandwiching the magnetizing direction between the pair of yokes 1 and 2 are aligned with each other, that is, the closed magnetic path shown by the two-dot chain line in the figure is formed. In the armature 6, the central portion 6a is rotatably supported by the central portion 5d of the support groove 5c to rotate, and both end portions 6b and 6c are magnetic pole portions at one end of the pair of yokes 1 and 2.
Aspirated by 1a and 2b. Here, even when the excitation of the coil 4 is turned off, the magnetic flux of the permanent magnet 3 still forms a closed magnetic path, and thus the state is maintained.

Next, as shown in FIG. 3, when the coil 4 is excited in the direction opposite to that of FIG. 2, the armature 6 is formed in the same manner as described above so that a closed magnetic circuit shown by a chain double-dashed line is formed.
The center portion 6a is rotatably supported by the center 5d of the support groove 5c and rotates, and the opposite ends 6b and 6c are opposite to the case of FIG. And 1b, the state is maintained even when the coil 4 is deenergized. That is, it is a rotating type polar electromagnet that performs a bistable operation.

In such a polarized electromagnet, the permanent magnet 3
Is not arranged on the armature 6 as in the conventional example, but is sandwiched between the pair of yokes 1 and 2, so that the armature 6 receives the weight of the permanent magnet 3 unlike the conventional example. Since it is lighter by itself without a unit, when the central portion 6a is rotatably supported and rotates, the operating characteristics of the armature 6 are unlikely to change even if the attachment direction is different.

Further, the armature 6 is a flat plate and has a simple rod-like shape, and moreover, by simply fitting it in the support groove 5c provided in the support frame 5, a rotary polarized electromagnet can be easily constructed. Becomes

[0017]

In the polarized electromagnet of the present invention, the permanent magnet is sandwiched between the pair of yokes instead of being disposed in the armature as in the conventional example, so that the armature is different from the conventional example. In contrast, the weight of the permanent magnet does not add to the weight, so it becomes lighter by itself, so when the central part is rotatably supported and it rotates,
Even if the mounting direction is different, the operating characteristics of the armature do not easily change.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention.

FIG. 2 is a cross-sectional plan view showing an operating state of the armature when the above coil is excited in a specified direction.

FIG. 3 is a cross-sectional plan view showing an operating state of the armature when the coil of the above is excited in a direction opposite to that of the case of FIG.

[Explanation of symbols]

 1 Yoke 1a One end magnetic pole part 1b Other end magnetic pole part 2 Yoke 2a One end magnetic pole part 2b Other end magnetic pole part 3 Permanent magnet 4 Coil 6 Armature 6a Central part 6b End part 6c End part

Claims (1)

[Claims] 1. A pair of yokes arranged in parallel so that magnetic pole portions at both ends face each other, a permanent magnet sandwiched between the pair of yokes in a magnetizing direction, and wound around substantially the center portion of the pair of yokes. And the armature in which, when the coil is excited in a specified direction, the central portion is rotatably supported and rotates, and both ends are alternately attracted to either one of the magnetic pole portions at both ends of the pair of yokes. A polar electromagnet characterized by comprising.