JPS5922694Y2 - polarized electromagnetic relay - Google Patents

Description

[Detailed description of the invention] The present invention relates to a polarized electromagnetic relay, and its purpose is to have a thin overall design with low power consumption, to be able to set a large contact interval, and to have two-stage operation during excitation. It is an object of the present invention to provide a polarized electromagnetic relay that prevents this and increases the holding force.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the accompanying drawings showing embodiments thereof.

In Figures 1 to 4, 1 is a first insulator made by insert molding a U-shaped iron piece 2, and 5 is a second insulator made by insert molding two L-shaped iron pieces 6, which are obtained by dividing the U-shaped piece into two. Permanent magnets 8 and 9, each of which is magnetized with two poles on one side, are attached to the upper and lower surfaces of the above-mentioned cross-shaped iron piece 6゜6, which are insulators, and are attached across the opposite sides, and a card is attached to the lower surface of the tip of the second insulator 5. Part 1
0.10 is provided integrally.

Further, cylindrical projections 3, 3 are protruded from the lower surface of the first insulator 1, and a circular hole 11 formed in the second insulator 5 is provided with the projections.
, 11 and ultrasonic welding or thermal caulking, the two assembly bodies 1 and 5 are integrated to form the armature A.

Then, in the integrated state as described above, the iron piece 2. 6. 6 magnetic pole faces 2a, 5a.

6a are vertically opposed to each other at a predetermined angle, and iron pieces 2.6
Step portions 1a and 5a of the first insulator 1 and the second insulator 5 protrude inward by a slight height δ (for example, 0.05 mm) on the base end side (see FIG. 5).

15 is a U-shaped fixed iron core, 17 is a spool fixed to the center of the iron core 15, and a coil 19 is wound around the body of the spool 17.

Both ends 16.16 of the iron core 15 are inserted into the openings of the armature A, and their tips 16a, 16a slightly protrude from the end 12 of the armature A, and the ends 16.16 of the iron core 15 are inserted into the openings of the armature A. The lower surface faces the magnetic pole faces 2a, 6a, 5a of the armature A's iron piece 2, 6°6.

The armature A is supported at its end 12 by both ends 16, 16 of the iron core 15, and is swingable at a predetermined angle.

Reference numeral 22 denotes a movable contact piece 2 having spring properties and bent into a cylindrical shape.
3.23 is insert molded into a movable contact piece block,
The external terminal portion 24.24 of the movable contact piece 23.23 projects laterally, and a stepped portion 25 is formed on the outer periphery and recessed portions 26.26 are formed on both sides of the inner surface.

In addition, a claw part 27 is provided on the upper part, and a cylindrical protrusion 28 is provided on the lower surface.
28 are integrally molded.

Reference numeral 30 denotes a fixed contact piece block which is insert-molded so as to span two fixed contact pieces 31.31 and two coil terminals 34.34, and the fixed contact piece and the coil terminal are placed on the side of one block part 37. External terminal parts 32 and 35 protrude from the block part 37, and a circular hole 38 and a claw part 3 are formed in the block part 37.
9 and a stepped portion 40 are formed.

Further, a coil terminal 34 is provided on the top surface of the other block portion 41.
, 34 protrude, and a positioning step 4 is provided on the inner surface thereof to engage with the collar 18.18 of the spool 17.
2 is formed.

Then, by fitting the protrusion 28 of the movable contact piece block 22 into the circular hole 38 of the one block portion 37 and performing ultrasonic welding or heat caulking, the movable contact piece block 2
2 and the fixed contact piece block 30 are integrated, and the fixed contact 33.33 provided on the upper surface of the fixed contact piece 31.31 and the tip of the movable contact piece 23.23 face each other with a predetermined interval.

Here, the electromagnet section constructed by inserting the iron core 15 into the armature A is integrated into both blocks 22 and 30.
When the armature A is fitted into the fixed contact block 22, the end surface of the armature A comes into contact with the inner surface of the movable contact block 22, the tip 16a of the iron core 15 fits into the recess 26, and the flange 18 of the spool 17 contacts the fixed contact block 22. It is positioned by engaging with the inner surface of the block portion 41 of No. 30 and the stepped portion 42 .

In this state, the drawer part of the coil 19 is connected to the end part 36 of the coil terminal 34, and the card part 1 of the amateur A
0 comes into contact with the upper surfaces of the movable contact pieces 23, 23.

45 is a cover made of synthetic resin, and the fixed contact piece block 30
The open end is covered from the block part 41 side of the movable and fixed contact piece block 22.30, and the stepped part 25.4 of the block 22.30
At the same time, the claw portion 27 of the block 22.30 is positioned at the four portions 46.47 provided on the inner surface of the cover 45.
．． When 39 is engaged, removal is prevented.

Then, the inner surface of the cover 45, the outer surface of the block portion 41 of the fixed contact piece block 30, and the collar portion 18 of the spool 17.
The inside of the cover 45 is held without wobbling due to contact with one side of the cover 45.

The operation of the polarized electromagnetic relay assembled as described above will be explained.

First, in a normal state (when the coil 19 is demagnetized), the armature A is biased clockwise in FIG. are in contact with each other.

Note that the movable contact piece 23 and the fixed contact 33 are separated from each other.

Now, when a current is applied to the coil 19 in a direction that cancels out the magnetic flux of the permanent magnets 8 and 9, the iron pieces 6 on the lower surface repel the iron core 15, and the iron piece 2 on the upper surface is attracted, and the amateur A becomes as shown in FIG. Rotates in a moderately circular direction.

As a result, the card unit 10 of amateur A pushes down the movable contact piece 23.23, the movable contact pieces 23, 23 and the fixed contact 33.33 come into contact, and the contact is closed.
The tip side of the magnetic pole surface 2a of the iron piece 2 and the upper surface of the iron core 15 are brought into contact with each other.

Then, when the power supply to the coil 19 is stopped, the armature A rotates clockwise in FIG.
The lower surface of the iron piece 6 comes into contact with the tip end of the magnetic pole surface 6a of the iron piece 6, and the contact opens.

,. Generally, the iron pieces 2 and 6 are made of thin metal plates, so
During the manufacturing stage, the flatness of the magnetic pole faces 2a and 6a is often not achieved and the pole faces are often slightly curved.

On the other hand, if the iron pieces 2 and 6 are used in a bent state, the proximal ends (end 12 side) will come into contact with the iron core 15 first (as shown by point P in Fig. 6), and at the moment of this contact, the iron pieces will 2, 6 and iron core 1
A large amount of magnetic flux flows between the iron piece 2.5 and the iron piece 2.6, and when the tip side of the iron piece 2.6 comes into contact with the iron piece 2.6, the attraction force is lowered by 4 degrees (as shown by point Q in FIG. 6), resulting in a so-called two-stage operation.

In order to prevent such a problem, step portions 1a and 5a of a slight height δ are provided on the proximal end side of the iron piece 2. Instead of making contact, the tip sides of the magnetic pole surfaces 2a and 6a were always brought into contact.

As a result, the attraction force between the iron pieces 2, 6 and the iron core 15 increases to point R in FIG. 6 without decreasing.

In the above embodiment, the step portions 1a and 5a are provided on both insulators 1 and 5, respectively, but the step portion 5a of the second insulator 5 does not necessarily need to be provided.

The outer surface of the armature A is coated with a synthetic resin, and in particular, the synthetic resin wall is interposed between the contact piece 23, 23 and the iron pieces 6, 6, so that insulation is maintained even if the distance between them is reduced. is sufficiently guaranteed, making it possible to reduce the thickness.

Further, since each contact piece 23.31 and the coil terminal 34 are constructed of a single plate that connects to the external terminal portion, connection work using lead wires or the like is not required, and each contact piece 23.
31 and coil terminal 34 are shaped into insert bottoms and made into blocks, which can be assembled by stacking them.
Easy to assemble and position.

In the above embodiment, only the iron piece on the lower surface of the armature A is divided into two L-shaped iron pieces 6, 6), and the permanent magnets 8, 9 are passed over this divided part to turn off the current to the coil 19. We have described a so-called single stipple type polarized electromagnetic relay that returns when it stops, but if the iron piece 2 on the top of armature A is also divided into two parts and a permanent magnet is passed across this divided part, the current to the coil 19 will be stopped. It is also possible to use a so-called latching type polarized electromagnetic relay that maintains its operating state even when the coil 19 is turned on and returns to its original state only by passing a current in the opposite direction through the coil 19.

Furthermore, the card section 10 of the amateur A is not limited to being provided only on the bottom surface, but may be provided on the top surface, and accordingly, a contact mechanism section may be provided above the amateur A.

As is clear from the above explanation, according to the present invention, an armature made of iron pieces joined at a predetermined angle is supported so as to be swingable in the thickness direction of the iron core, and a part of the armature opens and closes the contacts. As a result, the overall structure can be made thin, and there is no need to provide a card or the like made of a separate member, and the structure is simplified.

In addition, the armature's permanent magnet also serves as a return spring, and a repulsive force acts when the coil is excited, so a large operating force can be obtained with a small size and low power consumption.

Moreover, since the card part is provided at the farthest position from the armature's hinge point, the stroke of the card part is large and the contact spacing can be set large.

Therefore, the present polarized electromagnetic relay can be used for large-capacity switching or DC switching, and the contact spacing can be easily adjusted during assembly.

In addition, because we provided an armature step made of non-magnetic material on the proximal end (joining end) of the iron piece, only the tip side of the magnetic pole face of the iron piece comes into contact with the iron core, even if the iron piece is curved. A large suction force can be obtained without causing a two-stage operation.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of a polarized electromagnetic relay according to the present invention;
Figure 2 is a partial cross-sectional plan view of the assembled state, and Figure 3 is a partial cross-sectional plan view of the assembled state.
The sectional view taken along the line III--III in the figure, and FIG. 4 is the IV--
5 is a partially enlarged view of FIG. 3, and FIG. 6 is a diagram showing the relationship between the spacing between the iron piece and the iron core and the suction force. 1...First insulator, 1a...Step part, 2
... Iron piece, 2a ... Magnetic pole surface, 5 ...
...Second insulator, 5a...Step part, 6...
...Iron piece, 6a...Magnetic pole face, 8,9...
・Permanent magnet, 10...Card part, A...
・Amateur, 15... Iron core, 17...
・Spool, 19... Coil, 22...
・Movable contact piece block, 23...Movable contact piece,
24...External terminal section, 30...Fixed contact piece block, 31...Fixed contact piece, 32...
...External terminal section, 34... Coil terminal, 3
5...External terminal section, 37.41...Block section, 45...Cover

Claims (1)

[Scope of utility model registration request] A U-shaped iron core with a coil wound around the center and two pieces of iron are connected to each other at a predetermined angle, and the joint ends are swingably supported on both ends of the above iron core, and the two pieces are At least one of the iron pieces is composed of an iron piece that comes into contact with one arm of the U-shaped iron core, and another iron piece that comes into contact with the other arm while keeping a predetermined distance from this iron piece, and one of the iron pieces has an N pole. A permanent magnet is passed over the armature so that the S pole is in contact with the armature and the S pole is in contact with the other arm. A movable contact piece that is displaced by the movement of the card part of the armature based on the excitation of the armature, and a fixed contact piece that comes into contact with and separates from the movable contact piece. A polarized electromagnetic relay characterized by integrally provided with a stepped portion projecting slightly toward the iron core from the magnetic pole face on the coupling end side.