JPS5916241A - Polarized electromagnet - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of the Invention The present invention relates to a polarized electromagnet used in a polarized relay or the like.

(b) Prior Art and its Problems Conventionally, a polarized electromagnet having a structure as shown in FIG. 1 has been provided in order to form an efficient magnet poor circuit and increase sensitivity. That is, an iron core 11 with a coil 10 wound around the center.
One end 11a protrudes upward, and the other end 11
b, liG protrudes upward in a bifurcated shape, and this iron core 1
Above 1, a movable part A having a permanent magnet 14 sandwiched in the magnetization direction between a pair of L-shaped movable iron pieces 12 and 13 is rotatable about the shaft support hole 15a of the shaft support member 15. It is provided. By energizing the coil 10, the movable part A rotates, for example, in the direction of the arrow, and as one end 12a of one iron piece 12 approaches one end 11a of the iron core 11,
The other end 13b of the other iron piece 13 is the other end 11 of the iron core 11.
It is approaching c.

However, in this case, the movable part A consists of two iron pieces 12.
13, at least one permanent magnet 14, and a shaft supporting member 15 that pivotally supports these, the movable part A becomes large and complicated, and the positional accuracy of the movable iron piece and the iron core becomes difficult. In addition, the weight of the movable part increases, resulting in a large moment of inertia, which has the drawback of being inferior in terms of high-speed operation, vibration resistance, impact resistance, etc.

(c) Purpose of the Invention The present invention has been made in view of the above-mentioned drawbacks of the conventional art, and provides a polarized electromagnet whose movable parts are miniaturized and simplified, speeding up the operation, and improving performance such as impact resistance. The purpose is to

B) Structure and effect of the invention In order to achieve the above object, the present invention comprises a movable part made of a single movable iron piece, a permanent magnet held between a pair of iron cores, and a coil wound around the outer periphery of the iron core. It was rotated. With this configuration, the moving part can be made smaller and simpler while maintaining high sensitivity, improving dimensional accuracy, and reducing the weight of the moving part and the moment of inertia, resulting in faster operation. , vibration resistance, and impact resistance can be improved.

(Explanation of Embodiments FIGS. 2 and 3 show an example of a polar electromagnet according to the present invention, and 1 and 2 are a pair of symmetrical iron cores, and one end portions 1a and 2a of these iron cores are spaced apart at a predetermined distance. The other end portions 1b and 2b protrude upward so as to face each other with a gap between them.A permanent magnet 3 is located between the central portions of the iron cores 1 and 2. is sandwiched in the direction of magnetization, and a coil 4 is mounted on the outer periphery of the iron cores 1 and 2 that sandwich the permanent magnet 3.
is wound.

Reference numeral 5 denotes a substantially T-shaped movable iron piece punched out of a single magnetic plate, one end of which has a central leg 5a located between opposing ends 1a and 2a of the iron core 1.2, and the other end with both shoulders. Part 5b
, 5c face the other ends 1b and 2bK of the iron cores 1 and 2. Reference numeral 6 denotes a shaft support hole provided at the center of both shoulders of the movable iron piece 5, into which a support shaft (not shown) protruding from a spool, an insulating stand, etc. is fitted. Thereby, the movable iron piece 5 is rotatably supported so as to short-circuit diagonal poles of the iron cores 1 and 2.

In the polarized electromagnet having the above configuration, when the coil 4 is not energized, N poles are formed by the permanent magnet 3 at both ends 1a and lb of one iron core 1, and both ends 2a and lb of the other iron core 20,
An S pole is formed at 2b. Since the movable iron piece 5 is pivoted so as to short-circuit diagonal poles, it is stably maintained with the ends 1a and 2 of the iron core short-circuited or with the ends 1b and 2a short-circuited.

Now, when a current is applied to the coil 4 to excite it in the m direction, N poles are formed at the ends 1b and 2b of the iron core, and S poles are formed at the ends 1a and 2a. The north pole at the end 1b and the south pole at the end are strengthened, and the end 1a
The north pole of the end portion 2b and the south pole of the end portion 2b are weakened. therefore,
The movable iron piece 5 is the end portion 1b of the iron core.

Rotate so as to short-circuit 2a. Further, when the coil 4 is excited in the opposite direction (m' direction), the movable iron piece 5 similarly rotates so as to short-circuit the end portion la + 2b of the iron core.

As in the above embodiment, since the movable iron piece 5 is made of a single plate in the shape of a single letter, the weight of the movable iron piece 5 is reduced, the dimensional accuracy is greatly improved, and sharp and reliable operation can be obtained. In addition, since the pivot point of the movable iron piece 5 is located at the center of both shoulders 5b and 5c, the weight balance is good and no unreasonable force is applied to the shaft support hole 6, resulting in smooth operation. .

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a conventional polarized electromagnet, FIG. 2 is an assembled perspective view of the polarized electromagnet according to the present invention, and FIG. 3 is an exploded perspective view thereof. 1.2... Iron core, la, 2a, one end, 1b, 2b
Other end, 3. Permanent magnet, 4. Coil, 5. Movable iron piece, 5a. Central leg, 5b, 5c.. Shoulder.
6... Pivot hole. Patent applicant: Tateishi Electric Co., Ltd. Agent
Patent attorney Tamotsu Oohaku and two others Figure 1 Figure 2 t.

Claims (1)

[Claims] (1) A pair of symmetrical iron cores with one end facing each other at a predetermined distance and the other end formed at right angles thereto, and a permanent magnet held between the central parts of both cores in the direction of magnetization. and a coil wound around the outer periphery of an iron core holding a permanent magnet in between, one end of the central leg being located between the opposite ends of the iron core, and both shoulders of the other end facing the other end of the iron core. The movable iron piece is rotatably supported so that when the tip of the central leg of the movable iron piece approaches one of the iron cores, one shoulder approaches the other iron core. A polar electromagnet characterized by: