JPH088045B2 - Polarized electromagnet device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a polar electromagnet device used in a polar electromagnetic relay, and its purpose is to reduce the number of parts to a necessary minimum. It is to make it compact and ultra-thin and to manufacture it economically.

[Conventional technology]

BACKGROUND ART Conventionally, as for a polarized electromagnetic relay, an electromagnet device as shown in FIG. 5 is known. (JP-A-53-1227
No. 52) This polarized electromagnetic relay is composed of two parts, an electromagnet device A and a contact spring mechanism B. In this figure, two armature plates 1 are made of a magnetic material and are magnetized to have different polarities by two permanent magnets 14, and the central portions of both are made of synthetic resin.
They are connected by 15, and the armature 6 is formed by insert molding of the armature plate 1. Cards 2 made of synthetic resin and formed in a substantially U shape are attached to both sides of the armature plate 1. The inner surface of the card 2 is provided with a groove 12 into which the narrowed portion of the side end of the armature plate 1 fits, and the stepped portion 13 of the armature plate 1 contacts the bottom piece of the card 2 and becomes thinner. The card 2 is positioned and attached to the armature plate 1 by press fitting the fitted portion into the groove 12.

In the figure, 4 and 4 are coil 3 wound around the body,
Are magnetic pole pieces having different polarities when excited, and the shaft hole 16 of the central base portion 15 is rotatably fitted to the support shaft 17 of the separator 16 mounted on the upper portion of the coil 3 to form the armature 6. It is supported and inserted into the pole pieces 4 and 4 in the opposing poles 7 and 8, respectively. Reference numeral 18 is a terminal block having a recess 19 in the center thereof, and the coil 3 on which the armature 6 is mounted is inserted and arranged in the recess 19. One end of the movable contact spring 5 is fixed to each of four terminal plates 20 projecting from four positions on the upper surface of the terminal block 18, and the movable contact 22 attached to the other end of the movable contact spring 5 is a terminal block. The contact points can be opened and closed freely with the fixed contacts 23 provided at the four corners of the upper surface. And the side projections 24,25 of the card 2
Are movable inside the contact springs 5, respectively, and the movable contact springs 5 are pushed or returned by the side projections 24, 25 by the rotation of the armature 6 by the excitation of the coil 3. It is designed to open and close the contacts.

[Problems to be solved by the invention]

In the polarized electromagnet device in which the armature 6 is normally and reversely rotated by such movement of the electromagnet device and the movement is transmitted to the contact spring mechanism to open and close the contact, the coil wound around the core barrel portion is used. 3 is provided with a support shaft 17 extending in the vertical direction and the armature 6 is rotatably supported on the support shaft 17, so that the thick armature 6 is superposed on the thick coil 3. Thinning cannot be achieved because of the combined structure. In addition, the structure is complicated and the number of parts is large, especially the armature 6
It is necessary to separately prepare a separator 16 for supporting
Further, there is a problem in that the shape becomes large due to poor space utilization efficiency.

[Means for solving problems]

In order to eliminate these drawbacks, the present invention considers the components of the electromagnet device, particularly the configuration of the iron core and the armature, and reduces the number of components and reduces the size of the ultra-thin polarized electrode with stable characteristics. The purpose is to provide a type electromagnetic relay.

That is, according to the present invention, both end portions of the iron core are bent at right angles in the plate thickness direction to form a magnetic pole surface, and the magnetic pole surface is positioned outside the iron core width portion in order to obtain a sufficient magnetic pole area. It was possible to manufacture an ultra-thin polarized electromagnet device.

[Operation and Example]

Hereinafter, the present invention will be described in detail with reference to the drawings.
The figure is a schematic exploded perspective view of a polar electromagnet device of the present invention.

In the figure, 1 is a U-shaped iron core formed by pressing,
The plate thickness surfaces 1a at both ends are formed so as to form magnetic pole surfaces facing the armature 2. In general, it is known that manufacturing the parts by press working is suitable for mass production and contributes to cost reduction. The parts of the present invention are also shown in FIG. 2 in consideration of this point. (A) is a front view seen from the plate thickness surface, (b) is a plan view showing the shape punched by press, and (c) is a plan view showing both end portions of the iron core 1. It is a front view bent at right angles in the same direction, and since the front portions 1a on both sides of the front portions are magnetic pole faces, the height direction and the length of the iron core 1 in the longitudinal direction can be shortened. Reference numeral 1b is a positioning hole for fixing to the base block 5, and 1c is a fixing portion when the lead piece 8 of the coil terminal 7 is insert-molded on the supporting member 9 made of synthetic resin.

Reference numeral 2 is an armature block in which a pair of plate-shaped armatures 2a, 2b are arranged in parallel, and a connecting member 4 made of a permanent magnet is integrally formed in an H shape in the lower center thereof. Is provided with a shaft hole 4a. Reference numeral 5 is a base block made of synthetic resin, and a support shaft 5b is projectingly provided at the center of the recess 5a. The support shaft 5b is rotatably supported by inserting the shaft hole 4a provided in the connecting member 4 of the armature block 2 into the support shaft 5b. After that, when the iron core 1 around which the coil 3 is wound is fixed in the recess 5a of the base block 5, the armature 2 is attached to each magnetic pole surface 1a of the iron core 1.
The a and 2b are rotated so as to be attracted or repelled.

Next, the magnetic circuit of the present invention will be described in detail with reference to the operation explanatory view shown in FIG. 3. As shown in FIG.
In the non-excited state of the coil 3 wound around, the magnetic flux is generated only from the permanent magnet 4, and the magnetic flux Φ1 generated from the permanent magnet 4 is the N pole of the permanent magnet 4 → the armature 2b → the iron core 1 → the contact The pole 2a flows to the S pole of the permanent magnet 4, and one piece of the armature 2a, 2b is held by the magnetic pole surface 1a of the iron core 1.

Next, when the coil 3 is excited so that a magnetic flux in the direction opposite to the magnetic flux Φ1 of the permanent magnet 4 is generated, the magnetic flux Φ2 causes the iron core 1 → the armature 2a → the iron core 1 and the iron core 1 → the armature as shown in FIG. 2b
→ It occurs in the direction of the arrow in the two passages of the iron core 1. This armature 2b
→ The magnetic flux Φ2 of the iron core 1 cancels each other in the opposite direction to the magnetic flux Φ1, and the magnetic flux in this portion produces a repulsive action, and the magnetic flux Φ2 flowing in the armature 2a → the iron core 1 overlaps with the magnetic flux Φ1 and produces an attractive action. Therefore, the armatures 2a, 2b rotate about the support shaft 5b as a fulcrum. That is, the repulsion and suction actions are generated so as to be diagonally opposite to each other with the support shaft 5b as the center. afterwards,
If the excitation of the coil 3 is canceled, the magnetic flux Φ1 ′ of the permanent magnet 4 is generated in the arrow direction as shown in FIG.
hold b At this time, as in the embodiment of the present invention shown in FIG. 4, the movable contact springs 11 are mounted on the armatures 2a and 2b via the support member 6 made of synthetic resin, so that the movable contacts can be moved relative to each other. Opening and closing operations are performed between the facing fixed contacts to switch the respective contacts.

〔The invention's effect〕

According to the present invention having the above-mentioned configuration, a great effect is obtained as shown below.

(1) By arranging the iron core between the pair of armatures,
Can be made ultra-thin.

(2) Since the rotary support shaft is provided in the base mold, the separator is not required, the number of parts is minimized, and the structure is extremely simplified, so that the manufacturing configuration can be reduced and the cost can be reduced.

(3) Two permanent magnets and central bases made of synthetic resin that make up the bearings of the permanent magnets were required on both sides of the rotary shaft hole. However, the permanent magnets should be used as connecting members between the armatures to directly provide the shaft holes. As a result, only one permanent magnet is needed, reducing the number of parts.

(4) Further, since the movable contact spring is mounted on the armature via the support member made of synthetic resin, the drive card which has been conventionally required can be eliminated.

[Brief description of drawings]

FIG. 1 is a schematic exploded perspective view of a polar electromagnet device of the present invention,
FIG. 2 is a process diagram showing the shape of an iron core which is a component of the present invention, FIG. 3 is an operation explanatory diagram of the present invention, and FIG.
Is a non-excitation state, (b) is a state in which the coil 3 is excited,
The figure (a) shows the operation end state. FIG. 4 shows a polar type electromagnetic relay showing an embodiment of the present invention, FIG. 4 (a) is a plan view and FIG. 4 (b) is a front view. FIG. 5 shows a conventional polarized electromagnetic relay. 1 is an iron core, 2 is an armature, 3 is a coil, 4 is a permanent magnet, 5
Is a base block and 5b is a support shaft.

Claims (1)

[Claims] 1. A polar electromagnet apparatus comprising a coil-wound iron core, an armature and a permanent magnet, wherein a pair of armatures are arranged in parallel, and a connecting member having a shaft hole in the center of the lower part thereof. A U-shaped iron core is fitted between the armature blocks that are fixed to each other to form an H-shape, the lower part of the magnetic pole is fixed to the recess of the base block, and the shaft hole provided in the connecting member is formed in the recess of the base block. Four pole faces, which are formed by bending both ends of the U-shaped iron core at right angles in the plate thickness direction, are rotatably supported by a support shaft provided at the bottom part, and are formed from the plate thickness face and the iron core width part. A polar electromagnet device, characterized in that it is configured to be positioned outside.