JP2623671B2 - Denji relay - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to an electromagnetic relay.

<Prior Art and Problems> Generally, an electromagnetic relay has only two modes, a return state (OFF) in which the coil is not energized and an operation state (ON) in which the coil is energized. A stepping type is required. As an example, for example, the first contact is ON, the second contact is ON, and the third contact is ON.
The one that gets three states of OFF, or the first
There is a configuration in which three states are obtained in which the second and third contacts are all ON, the first contact is ON, and the second contact is ON. However, this stepping type is the first and second
In addition, since the third state operates in a predetermined step order, it is inconvenient to obtain a state in which one step is skipped or to perform the reverse step.

In some cases, a plurality of electromagnetic relays are separately combined. For example, as shown in FIG. 3, a switching switch 103 is connected to first and second power supplies 101 and 102 having different voltage values.
The coils 104A, 105A of the first and second electromagnetic relays 104, 105 are connected via the
104a and the normally closed contact 105b of the second electromagnetic relay 105
And the normally open contact 105a of the second electromagnetic relay 105 is used for opening and closing the second load circuit 107.

That is, when the coils 104A and 105A are not energized, the first and second load circuits 106 and 107 are turned off because the first and second electromagnetic relays 104 and 105 are in the return state.
When the first power supply 101 is turned on (50% of the predetermined applied voltage), the first and second electromagnetic relays 104, 10
5 becomes the operating state and the returning state, respectively.
And the second load circuits 106 and 107 are turned on and off, respectively, and when the second power supply 102 is turned on (100% of the predetermined applied voltage), the first and second electromagnetic relays 1 and 2 are turned off.
04 and 105 are in operation, respectively, so that the first and second
Are turned off and on, respectively.

As another example, as shown in FIG. 4, a switching switch 1 is connected to first and second power supplies 108 and 109 having different polarities from each other.
03, the coils 110A, 111A of the first and second electromagnetic relays 110, 111 are connected.
The normally open contact 110a of the first electromagnetic relay 110 is connected to the first load circuit 114 by interposing diodes 112 and 113 having opposite polarities between the switch 110A and the switching switch 103 and the coil 111A.
And the normally open contact 111a of the second electromagnetic relay 111 is used for switching the second load.

This is because when the first power supply 108 is turned on (reverse voltage), the diodes 112 and 113 are in the forward and reverse directions, respectively, and the first and second electromagnetic relays 110 and 111 are in the operating state and the returning state, respectively. The first and second load circuits 114 and 115 are turned on and off, respectively, and the coil 11
When no power is supplied to the first and second electromagnetic relays 110 and 111A, the first and second load circuits 114 and 115 are turned off, respectively. At the time of turning on, the first and second diodes 112 and 113 are in the reverse and forward directions, respectively, and the first and second electromagnetic relays 110 and 111 are in the return state and the operation state, respectively. Therefore, the first and second load circuits 114 and 115 are provided. Are turned off and on, respectively.

3 and 4 described above, although three modes can be easily selected, a plurality of electromagnetic relays 104 (110), 105
Since (111) is required, there is a disadvantage that the cost increases.

<Object of the Invention> The present invention has been made in order to solve the above-mentioned disadvantages of the related art, and has as its object to provide an inexpensive electromagnetic relay having a relatively simple configuration, and being easy to use.

<Embodiment and Effect of the Invention> An electromagnetic relay according to the present invention is an electromagnet block which is fixed in a case and has pole faces set on the right and left sides of one end of an iron core, and contacts arranged on both left and right sides of the electromagnet block. A movable block which is magnetically connected by a permanent magnet between a mechanism and a pair of iron pieces disposed opposite to the two magnetic pole surfaces, respectively, and which is displaceable in a direction to attract and separate from the magnetic pole surfaces. A pair of left and right card portions for pressing and displacing the movable contact piece of the contact mechanism by the displacement of the movable block are provided on the movable block so as to face each other in the displacement direction of the movable block. A spring member for urging a different spring load to the movable block is provided in the case, and the spring load is temporarily stopped by the one spring member at a neutral position of the movable block. The stopper is provided in the case.

According to the present invention, there is provided a pair of spring members for biasing different spring loads in the direction opposed to the movable block, and the stopper is stopped by the stopper at the neutral position of the movable block. Thus, three modes can be easily obtained by selecting the voltage or current level applied to the coil or the polarity of the applied voltage, so that it is easy to use and the cost can be reduced.

<Description of Embodiments> FIGS. 1A to 1C are schematic configuration diagrams each showing an example of an electromagnetic relay according to the present invention in different modes.

In FIG. 1, reference numeral 1 denotes a case including a base 2 and a cover (not shown). 3 is a connecting piece 3c for both side pieces 3a and 3b.
A U-shaped yoke 4 fixed to the base 2 is an iron core fixed to the connecting piece 3c of the yoke 3, and a coil 6 is connected to the iron core 4 via a coil spool 5. Wound, one end left and right sides are magnetic pole faces 4a, 4b
Is set as The yoke 3, the iron core 4, the coil 6, etc. constitute an electromagnet block 7.

Reference numerals 8 and 9 denote contact mechanisms located on both sides of the electromagnet block 7 and arranged on the base 2, respectively. One contact mechanism 8 is a movable terminal piece 10 fixed to the base 2.
A movable contact piece 11 supported by the movable terminal piece 10, a movable contact 12 fixed to the tip of the movable contact piece 11,
And a fixed-side terminal strip 14 to which a fixed contact 13 facing the movable contact 12 is fixed. The other contact mechanism 9 includes a movable terminal piece 15 fixed to the base 2, a movable contact piece 16 supported by the movable terminal piece 15, and a movable contact piece.
The movable contact 17 is fixed to the distal end of the movable contact 16 and the fixed terminal piece 19 is fixed to the base 2 and has a fixed contact 18 opposed to the movable contact 17 fixed thereto.

Reference numeral 20 denotes a movable block formed by magnetically connecting a pair of iron pieces 21 and 21 disposed opposite to the magnetic pole surfaces 4a and 4b by permanent magnets 23. The movable block 20 is attracted to and separated from the magnetic pole surfaces 4a and 4b. Is set to be displaceable in the right and left directions, that is, in the left and right directions (arrows K1 and K2 directions). The structure for supporting the movable block 20 and the like are omitted for simplification of the drawing. Reference numerals 24 and 25 denote card portions provided on the movable block 20 and projecting in the left and right directions, respectively, so as to press and displace the respective inner surfaces of the movable contact pieces 11 and 16.

The movable contact pieces 11 and 16 also serve as spring members for pressing the movable block 20 from directions facing each other via the card portions 24 and 25, respectively. Are different from each other so that, for example, F> f.

26 is a stopper fixed to the base 2, and is provided at a neutral position of the movable block 20 at a position where the spring load of the movable contact piece 11 to the movable block 20 is temporarily stopped.

27 and 28 are a pair of coil terminals of the coil 6,
Originally, it is fixed to the base 2, but is symbolized here for convenience.

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

When the coil 6 is de-energized, the spring load F of the right movable contact piece 16 is larger than the spring load f of the left movable contact piece 11, and the difference acts on the movable block 20. On the other hand, in this case, the magnetic flux of the permanent magnet 23 is generated by the right iron piece 22, the magnetic pole surface 4b of the iron core 4, the iron core 4, the yoke 3, and the left piece 3a of the yoke 3,
In order to form a magnetic circuit loop of the iron piece 21 on the left side, an attractive force of the magnetic pole surface 4b acts on the iron piece 22. As a result,
The movable block 20 is displaced to the left (in the direction of the arrow K1), and the gap between the movable contact 17 and the fixed contact 18 of the right contact mechanism 9 is turned off.
Thus, the contact between the movable contact 12 and the fixed contact 13 of the left contact mechanism 8 is turned on.

When a voltage of, for example, 50% of a predetermined value is applied to the coil 6, the coil 6 is excited to generate a magnetic flux for canceling the magnetic flux of the permanent magnet 23, and the magnetic pole surface 4a of the iron core 4 is attracted to the iron piece 21 on the left side. Force acts. This allows the movable block 20
Begins to displace to the right (in the direction of arrow K2), but the movable contact piece 11 on the left side is at the neutral position of the movable block 20 (FIG. 1B).
The spring load f of the movable contact piece 11 with respect to the movable block 20 disappears against the stopper 26 as shown in FIG.
Only the spring load F of 16 acts against the suction force, and the movable block 20 is held at the neutral position. As a result, the connection between the movable contact 12 and the fixed contact 13 of the left contact mechanism 8 is turned off.
Thus, the gap between the movable contact 17 and the fixed contact 18 of the right contact mechanism 9 is also kept OFF.

When a voltage of a predetermined value (100%) is applied to the coil 6, the attractive force of the magnetic pole surface 4a of the iron core 4 with respect to the iron piece 21 on the left side is increased, and the spring load F of the movable contact piece 16 on the right side is increased.
, The movable block 20 is displaced rightward (in the direction of arrow K1) from the neutral position as shown in FIG. 1 (C).
Therefore, the connection between the movable contact 12 and the fixed contact 13 on the left is OFF.
As it is, the space between the right movable contact 17 and the fixed contact 18 is turned ON.

As described above, in the above configuration, only one electromagnetic relay changes the level of the voltage applied to the coil 6, and the three modes, namely, the ON / OFF state when no power is supplied and the OFF / OFF state when power is supplied. Neutral state and OFF / ON when energized
Can be selected, and a highly versatile one can be obtained at low cost. Of course, the same effect can be obtained by changing the current ratio instead of the level of the applied voltage.

2 (A) to 2 (C) show another embodiment of the present invention, in which a spring is applied to the movable block 20 of the right movable contact piece 16 from the spring load F of the left movable contact piece 11 to the movable block 20. The load f is set to be small, and the polarity of the voltage applied to the coil 6 is changed.

When a reverse voltage (negative voltage) is applied to the coil 6, the movable block 20 moves to the left as shown in FIG. 2A against the difference between the spring loads F and f of the movable contact pieces 11 and 16. (Arrow K1 direction)
The movable contact 17 and the fixed contact 18 on the right are turned off, and the space between the movable contact 12 and the fixed contact 13 on the left is turned on.

When the coil 6 is not energized, the movable block 20 is displaced to the right (in the direction of arrow K2) due to the difference between the spring loads F and f. Since only the spring load f of the right movable contact piece 16 acts on the stopper 26, the movable block 20
It is held at the intermediate position as shown in FIG. As a result, the portion between the left movable contact 12 and the fixed contact 13 is turned off, and the portion between the right movable contact 17 and the fixed contact 18 is also kept off.

When a forward voltage (positive voltage) is applied to the coil 6, the attractive force of the magnetic pole face 4a of the iron core 4 acts on the iron piece 21 on the left side, which overcomes the spring load f of the movable contact piece 16 and the movable block 20 Is displaced rightward (in the direction of arrow K2). As a result, the space between the left movable contact 12 and the fixed contact 13 remains OFF, and the space between the right movable contact 17 and the fixed contact 18 is turned ON.
That is, also in the case of this example, three modes can be arbitrarily selected as in the above-described embodiment.

In each of the above embodiments, a pair of spring members for urging the movable block 20 with a spring load are each provided with a movable contact piece.
As an example, the movable contact piece 1
It may be separate from 1,16.

Further, the electromagnet block 7 is not limited to the above-described structure, and various modifications can be adopted for details such as the shape of the yoke 3.

[Brief description of the drawings]

1 (A) to 1 (C) are schematic configuration diagrams showing one example of an electromagnetic relay according to the present invention in different modes, and FIGS.
(C) is a schematic configuration diagram showing another embodiment of the present invention in different modes, and FIGS. 3 and 4 are explanatory diagrams of a conventional electromagnetic relay. 1 ... case, 4 ... iron core, 4a, 4b ... pole face, 7 ...
Electromagnetic block, 8, 9 Contact mechanism, 11, 16 Spring member, 20 Movable block, 21, 22 Iron piece, 23 Permanent magnet, 24, 25 Card part, 26 Stopper .

Claims (1)

(57) [Claims] 1. An electromagnet block fixed in a case and having magnetic pole surfaces set on one side and right and left sides of one end of an iron core, contact mechanisms disposed on left and right sides of the electromagnet block, respectively, and opposed to the magnetic pole surface. A movable block which is magnetically connected between a pair of the disposed iron pieces by a permanent magnet and is set so as to be displaceable in a direction to be attracted to and separated from the magnetic pole surface; A pair of right and left card portions for pressing and displacing the movable contact piece of the mechanism is projected from the movable block, and biases different spring loads to the movable block in directions opposite to each other in the displacement direction of the movable block. A pair of spring members is disposed in the case, and a stopper for temporarily stopping the spring load bias by the one spring member at the neutral position of the movable block is provided in the case. Electromagnetic relay, wherein the door.