JPH0249328A - Polarized electromagnetic device - Google Patents

Abstract

PURPOSE:To simplify the constitution and improve the operability by opposing a movable piece comprising a 3-polar magnetized permanent magnet having the center part thereof magnetized differently from both right and left end parts to a U-shaped core wound with a electromagnetic coil in such a way as to be capable of oscillation via a support spring for the center part thereof. CONSTITUTION:An electromagnetic block A wound with an electromagnetic coil 1 between both magnetic poles of a U-shaped core 3 so set as to have both right and left ends as magnetized parts 3a and 3b is fixed to a device body C. A plate-shaped movable piece 17 is so positioned that both right and left end parts 17a and 17b thereof oppose the right and left magnetized poles 3a and 3b of the core 3, and the movable piece 17 is constituted with a 3-pole magnetized movable permanent magnet 17 having the center thereof magnetized differently from both right and left end parts 17a and 17b. The permanent magnet 17 is so pivotally fitted to the side wall part of the device body C as to be capable of oscillation via support springs 9 and 9 fixed to a center movable bed 8. According to this construction, it is possible to have the movable permanent magnet 17 oscillate smoothly.

Description

[Detailed description of the invention] <Field of invention> The present invention relates to a polarized electromagnet device.

<Prior Art and Problems> FIGS. 4 and 5 are an exploded perspective view and a front sectional view, respectively, showing an example in which a conventional polarized electromagnet device is applied to an electromagnetic barrel appliance.

This electromagnetic relay consists of an electromagnetic block Δ, a movable block B, an end T base C, and a terminal base C.
also serves as the main body of the polar electromagnet device.

The electromagnet block Δ is composed of a coil spool 2 around which an electromagnetic coil 1 is wound, a square-shaped iron core 3, and a columnar permanent magnet 4 erected at the center of the iron core 3. That is, the iron core 3 described in 1- is inserted into the shaft portion of the coil spool 2 made of electrically insulating synthetic resin, and its both ends 3a,
3b is exposed to the outside from both end flanges 2a, 2b of the coils boules 2. The permanent magnet 4 is magnetized with different polarities under L, and is fixed to a central portion 2c of the shaft portion of the coil sbourg 2 by insert molding.

A coil connecting piece 5 is implanted into the collar portions 2a and 2b of the coil spool 2 by insert molding, and the coil end r6 (6A, 61) is set on the terminal base C.
connected to the inner end of the

The movable block B has a protrusion 7 forming a fulcrum on the lower surface of the center.
A movable iron piece 7 in the shape of a flat plate having a diameter c, a movable base 8 fixed to the center of the movable iron piece 7, and a conductive support extending to both sides of the movable iron piece 7 in the width direction and fixed to the movable base 8. spring 9
. has been done.

1. The support spring 9 is connected and fixed to the inner end portion 1a of the common terminal 1) (IIA, IIQ) provided on the terminal base C. +2 (12A.

12B), +3 (+3A, +38) tf above end -f-
It is a fixed terminal provided on the base C, and each inner end + 2
a, l 3a, "2 movable contact piece + OA.

A fixed contact +48, 14B, which is brought into contact with and separated from 10B, is fixed. − to 2 electromagnet blocks A and the movable iron piece 7.
[Polar electromagnet device] 5. Reference numeral 16 denotes a cover fitted to the base C.

Next, the operation of the configuration described in item 1 will be explained.

Now, assuming that the magnetic flux Φ of the permanent magnet 4 forms a magnetic path flowing through the right magnetic pole part 3b of the iron core 3 as shown in FIG. 6b, the right end part 7b of the movable iron piece 7 is attracted to the L magnetic pole part 3b. be done.

In this state, when a unidirectional current is applied to the electromagnetic coil l to excite it and generate an excitation magnetic flux Φa (Fig. 6a) that cancels the magnetic flux Φ of the permanent magnet 4, the left magnetic pole of the iron core 3 A suction force is generated at 3a, and the left end 7a of the movable iron piece 7 is suctioned. That is, the movable block B is turned around the fulcrum protrusion 7c in the direction of the arrow a in FIG.
Contact 4A. Even if the excitation to the electromagnetic coil 1 is released, the magnetic flux Φ of the permanent magnet 4 passing through the left magnetic pole part 3a of the iron core 3
As a result, the set state is maintained.

In the state shown in FIG. 6a, when the electromagnetic coil 1 is reversely excited, the magnetic flux Φ of the permanent magnet 4 passing through the left magnetic pole part 3a of the iron core 3
is canceled out by the reverse excitation magnetic flux Φb (Fig. 6b), the right end 78 of the movable iron piece 7 is attracted to the right magnetic pole part 3b of the iron core 3, and the movable block [3 moves along the arrow mark in Fig. 6b with the protrusion 7C as the center. The movable contact piece 10I3 comes into contact with the (-1 constant contact 148).

In the conventional type, since the permanent magnet 4 is fixed to the center part 2c of the coil spool 2 as described above, the cross-sectional area of the coil is small, and there is a limit to the strength of the attractive force. In addition, when movable block B operates, Machi Motetsu)! Since friction occurs between the protrusion 7c at the center of +"'t and the permanent magnet 4, the movement of the movable block B becomes slow.Furthermore, the permanent magnet 4
is fixed in the center of the coil spool 2 by insert molding, so there is a problem that it is difficult to accurately determine the positional relationship between the iron core 3 and the permanent magnet 4.

<Objective of the Invention> The present invention has been made in order to solve the problems of the above-mentioned conventional ones, and has the following object: to provide a polarized electromagnet device that has a simplified configuration and excellent operability. .

<Structure and Effects of the Invention> The polarized electromagnet device according to the present invention includes an electromagnet block in which an electromagnetic coil is wound between the magnetic pole portions of a U-shaped iron core whose left and right ends are set as magnetic pole portions, and fixed to the device main body. , a movable piece whose left and right end portions are disposed at positions facing the left and right magnetic poles of the iron core, respectively, is composed of a three-pole magnetized movable permanent magnet whose center portion is magnetized with a different polarity from the left and right end portions. In addition, 1) the central portion is swingably supported on the main body of the device via a support spring;

According to this invention, since the movable piece is composed of a three-pole movable permanent magnet, the permanent magnet in the center of the iron core can be omitted, reducing the number of parts. Since the movable permanent magnet is pivotally supported on the main body of the device by a support spring, the movable permanent magnet can swing smoothly and its position with the iron core can be easily adjusted.

<Description of Embodiment> Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

1 and 2 are an exploded perspective view and a front sectional view, respectively, showing an example in which the polarized electromagnet device according to the present invention is applied to an electromagnetic relay, and are the same as the conventional one shown in FIGS. 4 and 5. The same reference numerals are given to the parts and the description thereof will be omitted.

In the same figure, 17 has both left and right end portions 17a+7b connected to the iron core 3.
The movable piece 17 is a plate-shaped movable piece arranged to face the left and right magnetic pole parts 3a, 3b, and the center part of the movable piece 17 has three poles magnetized with a different polarity from the left and right end parts 17a, +7b. It consists of a magnetized movable permanent magnet. This permanent magnet 17 is swingably supported on the side wall of the terminal base C via support springs 9, 9 fixed to the movable stand 8 in the center.

Next, the operation of the above configuration will be explained.

Now, due to the magnetic flux Φ of the movable permanent magnet 17, for example, the third
Assuming that a magnetic path passing through the right magnetic pole part 3b of the iron core 3 is formed as shown in figure b, the right end part +7b of the movable permanent magnet 17
is attracted to the right magnetic pole portion 3b of the iron core 3.

In this state, if a unidirectional current is applied to the electromagnetic coil l to excite it and generate an exciting magnetic flux Φa of the movable permanent magnet 17 passing through the right side magnetic pole part 3b of the iron core 3, the movable permanent magnet 17 will be movable as shown in FIG. 3a. A movable permanent magnet 1 is attached to the left magnetic pole part 3a of the iron core 3.
An adsorption force is generated against the left end portion +7a of 7. That is, the movable block B is rotationally displaced around the support spring 9 in the direction of the arrow a in FIG.
OA contacts fixed contact +4A. Even if the electromagnetic coil 1 is de-energized, the magnetic flux Φ of the movable permanent magnet 17 passing through the left magnetic pole portion 3a of the iron core 3 causes the upper 1 calligraphy set!
use is maintained.

In the set state shown in Fig. 3a, when a current is passed in the opposite direction to the electromagnetic coil l to reverse excite it, the reverse excitation magnetic flux Φb
(Fig. 3b), the magnetic flux Φ of the movable permanent magnet 17 passing through the left magnetic pole part 3a of the iron core 3 is canceled, and the right end of the movable permanent magnet 17 passes through the right magnetic pole part 3b of the iron core 3 as shown in Fig. 3b. An adsorption force is created for 17b. That is, the movable block 13 is rotated about the support spring 9 in the direction indicated by the arrow in FIG.
0B contacts fixed contact 148.

Here, since a permanent magnet is not provided in the center of the iron core 3, the winding cross-sectional area of the electromagnetic coil l wound around the iron core 3 becomes large, and the attractive force can be increased. Since the pole-magnetized movable permanent magnet 17 serves a dual purpose, the number of parts is reduced and the structure is simplified.

Furthermore, since the movable permanent magnet I7 is pivotally supported only by the support spring 9, there is no unnecessary frictional force during rotation compared to a conventional structure in which the movable permanent magnet I7 is supported by a protruding permanent magnet of the movable block B. This prevents the movable block B from rotating smoothly. Furthermore, since the positioning of the movable permanent magnet 17 and the iron core 3 can be accomplished by simply adjusting the support spring 9, it is easy to obtain positioning accuracy and, therefore, proper iE operation is ensured.

In addition, in the embodiment described in -■-, a bistable type was explained, but it can also be applied to a monostable type by providing a magnetic plate on either one of the magnetic pole parts 3a and 3b of the iron core 3. It is possible.

[Brief explanation of the drawing]

1 and 2 are an exploded perspective view and a sectional view, respectively, showing an example in which the polarized electromagnet device according to the present invention is applied to an electromagnetic relay, and FIGS. 3a and 3b show the polarized electromagnet device in the same electromagnetic relay. 4 and 5 are an exploded perspective view and a sectional view showing an example in which a conventional polarized electromagnet device is applied to an electromagnetic relay, respectively, and FIGS. 6a and 6b are polarized diagrams of the same conventional device t is an explanatory diagram of the operation of the magnet device. 1... Electromagnetic filter, 3... Iron core, 3a, 3b...
Magnetic pole part, 9... Support spring, 17... Movable permanent magnet,
+7a, 17b...both ends, A...electromagnetic block, C...device main body. Figure 3a Figure 3b

Claims (1)

[Claims] (1) An electromagnetic block in which an electromagnetic coil is wound between the magnetic pole parts of a U-shaped iron core whose left and right ends are set as magnetic pole parts is fixed to the device main body, and both left and right ends are set to the left and right magnetic pole parts of the iron core, respectively. The movable pieces disposed at opposing positions are composed of three-pole movable permanent magnets whose center part is magnetized with a different polarity from both left and right end parts, and the center part is connected to the center part through a support spring. A polarized electromagnet device characterized by being pivotably supported on the device body.