JP2636354B2 - Polarized magnet device - Google Patents

Description

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 relay.

This electromagnetic relay is roughly divided into an electromagnet block A, a movable block B, and a terminal base C. The terminal base C also serves as the main body of the polarized electromagnet apparatus.

The electromagnet block A includes a coil spool 2 around which an electromagnetic coil 1 is wound, a U-shaped iron core 3, and the iron core 3.
And a column-shaped permanent magnet 4 erected at the center of the column. That is, the iron core 3 is inserted into the shaft of the coil spool 2 made of an electrically insulating synthetic resin, and its both ends 3a, 3b
Are exposed to the outside from the flange portions 2a and 2b at both ends of the coil spool 2. The permanent magnet 4 is magnetized with different poles at the top and bottom, and is fixed to a part 2c at the center of the shaft of the coil spool 2 by insert molding.

A coil connecting piece 5 is implanted in the flange portions 2a and 2b of the coil spool 2 by insert molding, and is connected to the inner ends of the coil terminals 6 (6A and 6B) set on the terminal base C. .

The movable block B is a projection forming a fulcrum on the lower surface of the central portion.
A movable iron piece 7 having a flat plate shape having a movable iron piece 7c, a movable table 8 fixed to the center of the movable iron piece 7, and a conductive support extending to both sides in the width direction of the movable iron piece 7 and fixed to the movable table 8; Spring 9,
9, which extends in the longitudinal direction of the movable iron piece 7 and is fixed to the movable base 8, and is formed integrally with the support spring 9.
And a set of movable contact pieces 10 (10A, 10B).

The support spring 9 is connected and fixed to the inner end 11a of the common terminal 11 (11A, 11B) provided on the terminal base C.
Reference numerals 12 (12A, 12B) and 13 (13A, 13B) denote fixed terminals provided on the terminal base C, and fixed contacts which come into contact with and separate from the movable contact pieces 10A, 10B at respective inner ends 12a, 13a. 14A and 14B are fixed. The above-described electromagnet block A and the movable iron piece 7 constitute a polarized electromagnet device 15. 16 is the terminal base C
The cover is fitted to the cover.

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

Assuming that a magnetic path flowing through the right magnetic pole 3b of the iron core 3 is formed by the magnetic flux Φ of the permanent magnet 4 as shown in FIG. 6b, the right end 7b of the movable iron piece 7 is attracted to the magnetic pole 3b. You.

In this state, when a current in one direction flows through the electromagnetic coil 1 to excite it to generate an exciting magnetic flux Φa (FIG. 6a) for canceling the magnetic flux Φ of the permanent magnet 4, the magnetic flux is attracted to the left magnetic pole portion 3a of the iron core 3. A force is generated, and the left end 7a of the movable iron piece 7 is attracted. That is, the movable block B is turned around the fulcrum projection 7c in the direction of arrow a in FIG. 6a to be in a set state, and the movable contact piece 10A contacts the fixed contact 14A. Even if the excitation to the electromagnetic coil 1 is released, the left magnetic pole portion of the iron core 3
The set state is maintained by the magnetic flux Φ of the permanent magnet 4 passing through 3a.

6a, when the electromagnetic coil 1 is reversely excited, the magnetic flux Φ of the permanent magnet 4 passing through the left magnetic pole 3a of the iron core 3 is obtained.
Is canceled by the reverse excitation magnetic flux Φb (FIG. 6b), and the movable iron piece 7
The right end portion 7a is attracted to the right magnetic pole portion 3b of the iron core 3, and the movable block B is pivotally displaced about the projection 7c in the direction of arrow b in FIG. 6b to be in a reset state, and the movable contact piece 10B is fixed. Contact 14B.

In the conventional one, since the permanent magnet 4 is fixed to the central portion 2c of the coil spool 2 as described above, the coil cross-sectional area is small, and there is a limit in enhancing the attraction force. Further, when the movable block B operates, friction between the projection 7c at the center of the movable iron piece 7 and the permanent magnet 4 occurs, so that the operation of the movable block B becomes slow. Furthermore, since the permanent magnet 4 is fixed to the center of the coil spool 2 by insert molding, there is a problem that it is difficult to accurately determine the positional relationship between the iron core 3 and the permanent magnet 4.

<Object of the Invention> The present invention has been made in order to solve the above-mentioned problems of the conventional art, and an object of the present invention is to provide a polarized electromagnet device which can be simplified in configuration and excellent in operability.

<Position and Effect of the Invention> In a polarized electromagnet device according to the present invention, an electromagnet block in which an electromagnetic coil is wound between the magnetic pole portions of a U-shaped iron core whose right and left ends are set as magnetic pole portions is fixed to the main body of the device. A movable piece disposed at a position where the left and right ends face the left and right magnetic poles of the iron core, respectively, and a three-pole magnetized movable permanent magnet having a central portion magnetized to be different from the left and right ends. In addition, the central portion is pivotably supported on the apparatus main body via a support spring.

According to the present invention, since the movable piece is constituted by the three-pole movable permanent magnet, the permanent magnet at the center of the iron core can be omitted, the number of parts can be reduced, and the coil cross-sectional area can be increased to enhance the attractive force. Since the movable permanent magnet is pivotally supported on the apparatus main body by the support spring, the swinging operation of the movable permanent magnet can be facilitated, and the position of the movable permanent magnet relative to the iron core can be easily adjusted.

<Description of Embodiment> An embodiment of the present invention will be described below with reference to the drawings.

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

In the figure, reference numeral 17 denotes a plate-shaped movable piece arranged such that left and right end portions 17a and 17b face left and right magnetic pole portions 3a and 3b of the iron core 3. Parts 17a, 17
b is constituted by a three-pole magnetized movable permanent magnet magnetized to a different pole. The permanent magnet 17 is pivotally supported on the side wall of the terminal base C via support springs 9, 9 fixed to the movable table 8 at the center.

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

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

In this state, if a current in one direction is applied to the electromagnetic coil 1 to excite it to generate an exciting magnetic flux Φa of the movable permanent magnet 17 passing through the right magnetic pole portion 3b of the iron core 3, the movable coil becomes movable as shown in FIG. 3a. Attraction force to the left end portion 17a of the movable permanent magnet 17 is generated in the left magnetic pole portion 3a of the iron core 3. That is, the movable block B is rotated and displaced around the support spring 9 in the direction of arrow a in FIG.
Touch 4A. Even if the excitation of the electromagnetic coil 1 is released,
The set state is maintained by the magnetic flux Φ of the movable permanent magnet 17 passing through the left magnetic pole portion 3a of the iron core 3.

In the set state shown in FIG. 3a, when a current is applied to the electromagnetic coil 1 in the reverse direction to reversely excite it, the reverse excitation magnetic flux Φb
In FIG. 3B, the magnetic flux Φ of the movable permanent magnet 17 passing through the left magnetic pole portion 3a of the iron core 3 is canceled, and the right magnetic pole portion 3b of the iron core 3 is moved to the right end 17b of the movable permanent magnet 17 as shown in FIG. Attraction force is generated. That is, the movable block B is pivotally displaced about the support spring 9 in the direction indicated by the arrow b in FIG. 3b to be in a reset state, and the movable contact piece 10B contacts the fixed contact 14B.

Here, since no permanent magnet is provided at the center of the iron core 3, the winding cross-sectional area of the electromagnetic coil 1 wound around the iron core 3 becomes large, so that the attractive force can be increased and the movable piece 3 Since the structure is also used by the poled movable permanent magnet 17, the number of parts is reduced and the structure is simplified.

Further, since the movable permanent magnet 17 is pivotally supported only by the support spring 9, unnecessary frictional force at the time of rotation is required as compared with the conventional one in which the protrusion of the movable block B is supported by the permanent magnet. Does not occur, and the movable block B is smoothly rotated. Further, since the positioning between the movable permanent magnet 17 and the iron core 3 can be performed only by adjusting the support spring 9, the accuracy of the positioning can be easily obtained, and the proper operation can be ensured.

In the above embodiment, the bistable type is described, but the present invention can be applied to a monostable type by providing a magnetic plate on one of the two magnetic pole portions 3a and 3b of the iron core 3. .

[Brief description of the drawings]

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. FIGS. 3a and 3b are diagrams of the polarized electromagnet device in the electromagnetic relay. FIGS. 4 and 5 are an exploded perspective view and a sectional view showing an example in which a conventional polarized electromagnet apparatus is applied to an electromagnetic relay, and FIGS. 6a and 6b are polarized views of the conventional polarized electromagnet apparatus. It is operation | movement explanatory drawing of an electromagnet apparatus. DESCRIPTION OF SYMBOLS 1 ... Electromagnetic coil, 3 ... Iron core, 3a, 3b ... Magnetic pole part, 9 ... Support spring, 17 ... Movable permanent magnet, 17a, 17b ... Both ends, A ... Electromagnetic block, C ... Device main body.

Claims (1)

(57) [Claims] 1. An electromagnet block having an electromagnetic coil wound between said magnetic pole portions of a U-shaped iron core having right and left ends set as magnetic pole portions is fixed to an apparatus main body, and left and right both end portions of said iron core are left and right magnetic pole portions. The movable pieces arranged at positions facing each other are constituted by movable permanent magnets of three poles, the center of which is magnetized with different poles from the left and right ends, and the center of the movable piece is supported by a support spring. A polarized electromagnet device pivotally supported by the device main body.