JPH0574305A - Remote control relay - Google Patents

Abstract

PURPOSE:To get a remote control relay whose ON-operation current is small by fitting an attracting face of a plunger with a plate spring which acts as resisting force at the time of attracting the plunger. CONSTITUTION:A plate spring 30 fixed at a plunger 5 through a spacer 31 is installed such that the tip 30a of the plate spring 30 abuts against the sucking face 9b of a yoke 8. With this constitution, the spring 30 does not give resisting force to the plunger 5 in an ON-state, but the tip 30a of the spring 30 abuts against the sucking face 8b in an OFF state so that the spring 30 is curved to make the plunger 5 work upward, and as a result, resisting force which reduces the atracting force of the plunger 5 is generated. It is thereby possible to generate resisting force equal to a contact pressure of a contact at ON-time even at OFF time so that the attract force at the ON-time is balanced with that at the OFF-time and as a result, a relay whose ON-operation current is as small as the OFF-operation current can be obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote control relay.

[0002]

2. Description of the Related Art FIG. 6 is a side view showing an OFF state of a conventional remote control relay, FIG. 7 is a side view showing a main part of FIG. 6, and FIG.
FIG. 6 is a side view showing an ON state. The outer shell is composed of a base 1 and a cover 2, and has a groove 1 for a mounting bracket (not shown) at the bottom.
a and a DIN rail (not shown) mounting claw 1b, an opening 1c is formed in the upper portion, and they are integrally combined by rivets 3 at four holes 1d.

As shown in FIG. 6, the operating electromagnet device 4 is housed in an upright position with respect to the bottom portion (mounting surface) of the base 1 with the side projecting the plunger 5 at the center of the base 1 as the top. .. The operating electromagnet device 4 is of a polar type,
As shown in FIGS. 7 and 8, the plunger 5 is slidably arranged so as to penetrate the bobbin 7 around which the electromagnetic coil 6 is wound, and has the suction surfaces 5a and 5b at both ends. The first yoke 8 is in contact with the outer surface of the bobbin 7, and an opening 8a through which the tip 5c of the plunger 5 projects is formed in the upper surface. A pair of permanent magnets 9 are arranged on the left and right inner surfaces of the first yoke 8 and are in contact with the same kind of poles. A pair of U-shaped second yokes 10 are respectively in contact with the other poles of the permanent magnet 9 and are arranged so as to wrap the electromagnetic coil 6.

A link 12 for transmitting the movement of the plunger 5 to the movable contact 11 is located above the operating electromagnet device 4 and is rotatably supported by a pin 13 so that one end 12a is pin 14 at the plunger tip 5c. Are connected by.

The movable contact portion 15 is slidably engaged with an insulator 17 having one end connected to the other end 12b of the link 12 by a pin 16 and a groove 17a formed at the other end of the insulator 17. The movable contact 11 includes a mover 18 fixed to the movable contact 11, and a compression coil spring 19 arranged to press the contact by acting on the movable contact 11. The movable contact 11 is fixed to the main circuit terminal 20. It is arranged so that it can come into contact with and separate from. Convex portion 17b formed on the insulator 17
Engages with a groove (not shown) of the base 1 and a groove (not shown) of the cover 2, and the movable contact portion 15 is driven in the contact contact / separation direction in conjunction with the plunger 5. ..
The mover 18 is connected to the other main circuit terminal 2 by the shunt 22.
3 is electrically connected.

One of the pair of control terminals 24 for connecting the remote control electric wire is one of the leads 6a of the electromagnetic coil 6, and the other is the other of the electromagnetic coil 6 via the diode 25 and the control switch 26. Is electrically connected to the output line 6b of the printed circuit board 27.

Reference numeral 28 denotes an operation lever, which is the plunger 5
On the other hand, it is rotatably supported by a pin 29 on the side opposite to the link 12, one end of which is connected to the tip portion 5c of the plunger 5 by the pin 14, and the plunger 5 is driven to separate from the link 12. Can be rotated in the opposite direction.
This operation lever 28 is a manual operation unit 2 that can be operated from the outside
8a, which includes the base 1 and the cover 2
Is arranged in the opening 1c. In addition, this manual operation unit 2
There is a display part 28b on both sides of 8a, and the contact is ON / OFF.
The state is displayed through the opening 1c. Further, the manual operation lever 28 has an operating portion 28c which acts on the actuator 26a of the control circuit switch 26 to open and close the control circuit switch 26.

Next, the operation will be described. FIG. 7 shows a state in which the remote control relay is off.
As shown in, the magnetic flux of the permanent magnet 9 causes the plunger 5 to
Is held in a state where its suction surface 5a is suctioned to the bottom surface of the first yoke 8, and the contacts are also in a stable position in the open state.

In this main circuit open state (FIG. 7), when an ON operation switch (not shown) connected to the control circuit terminal 24 is turned on and the electromagnetic coil 6 is excited, the permanent magnet on the plunger attracting surface 5a. 9 reduces the adsorption force,
Magnetic flux is generated so as to increase the attraction force on the other attraction surface 5b. As a result, the plunger 5 is driven in the direction of the arrow in FIG. 7, and the link 12 moves the movable contact 11 into the fixed contact 2.
It is pushed down in the direction of 1, and the main circuit is closed as shown in FIG. In this main circuit closed state (FIG. 8), the suction surface 5b of the plunger 5 is suction-held on the upper surface of the first yoke 8. At this time, the operation lever 28 rotates clockwise in conjunction with the plunger 5, and the display changes from "OFF" to "O".
It changes to "N". In this series of operations, the operating lever 28 operates the actuator 26a of the control circuit switch 26 to switch the control circuit switch 26.

On the other hand, when the OFF operation switch is turned on in this main circuit closed state (FIG. 8), the electromagnetic coil 6 reduces the attraction force of the permanent magnet 9 on the plunger attraction surface 5b, and the other attraction surface 5a. Generates magnetic flux in the direction of increasing the attractive force. As a result, the plunger 5 is driven in the direction of the arrow in FIG. 8, and the movable contact 11 is separated from the fixed contact 21 by the link 12. As a result, the main circuit is opened as shown in FIG. This main circuit open state (FIG. 7) is an initial stable state in which the suction surface 5a of the plunger 5 is suctioned to the bottom surface of the first yoke 8. At this time, the operation lever 28 interlocks with the plunger 5 and rotates counterclockwise to change the display from "ON" to "OFF", and at the same time, switch the control circuit switch 26.

Next, when the main contact is opened and closed manually from the outside, the contact can be opened and closed by operating the manual operation portion 28a of the operation lever 28 to directly drive the plunger 5. In this case, the peeling force that is greater than the attraction force of the plunger 5 must be manually applied directly to the plunger 5.
In addition to forcibly peeling off the adsorption, another stable state is achieved. At this time, the movement of the movable contact portion 15 and the operation of the control circuit switch 26 are exactly the same as the series of operations of the electric operation described above.

[0012]

The operation of the polarized electromagnet device is such that an operating current is passed through the electromagnetic coil, thereby canceling out the magnetic flux of the permanent magnet on the attracting surface and reducing the attracting force.
With regard to releasing the plunger, in the conventional remote control relay as described above, the contact pressure of the contact acts as a reaction force in the ON state to reduce the attraction force of the attraction surface.
In the FF state, there is no force corresponding to this reaction force, and the suction force is large. Therefore, the operation current is larger than the OFF operation in the ON operation, and there is a problem that the operation current becomes large as a remote control relay.

The present invention has been made in order to solve the above-mentioned problems, and it works effectively when OFF, and O
The object of the present invention is to enable a well-balanced operation electromagnet device having a reaction force almost equal to that of the contact pressure spring at N, and to obtain a remote control relay with a small operation current.

[0014]

A remote control relay according to the present invention has a leaf spring provided on the attraction surface of a plunger of an operating electromagnet device.

[0015]

In the present invention, the leaf spring has the first position when it is turned off.
It comes into contact with the yoke and acts on the plunger and acts as a reaction force against the suction surface.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a side view of a remote control relay showing an OFF state, FIG. 2 is a view showing a main part of FIG. 1, and FIG. 3 is the same view as FIG. 2 showing an ON state. Are denoted by the same reference numerals and description thereof will be omitted. In the figure, reference numeral 30 denotes a leaf spring fixed to the plunger 5 via a spacer 31, and both ends 30a of the leaf spring abut on the attraction surface 8b of the first yoke 8.

In such an arrangement, the leaf spring 30 does not apply a reaction force to the plunger 5 in the ON state of FIG. 3, but the tip 30a of the leaf spring 30 in the OFF state of FIG.
Comes into contact with the attracting surface 8b of the first yoke 8 and the leaf spring 30 is bent to cause the plunger 5 to work in the direction of arrow A, and a reaction force that reduces the attraction force of the plunger 5 is generated.

Although the leaf spring 30 is fixed to the plunger 5 through the spacer 31 in the above embodiment, the plunger 5 is attracted by the spacer 5 as shown in FIGS. 4 and 5 without using the spacer 31. You may provide the leaf spring 30A bent so that a gap may be formed with the surface 5a.

[0019]

As described above, according to the present invention, a reaction force equivalent to the contact pressure of the contact at the time of ON can be generated even at the time of OFF, and the attraction force at the time of ON and the attraction force at the time of OFF can be balanced. This has the effect of enabling an electromagnet device and obtaining a remote control relay having a small ON operation current as well as an OFF operation current.

[Brief description of drawings]

FIG. 1 is a side view in an OFF state showing an embodiment of the present invention.

FIG. 2 is a side view showing a configuration of a movable contact portion and an operating electromagnet device in an OFF state.

FIG. 3 is a side view showing the ON state of FIG.

FIG. 4 is a side view showing a configuration of a movable contact portion and an operating electromagnet device according to another embodiment of the present invention in an OFF state.

FIG. 5 is a side view showing the ON state of FIG.

FIG. 6 is a side view showing an OFF state of a conventional one.

7 is a diagram showing a main part of FIG.

8 is a side view showing the ON state of FIG. 7. FIG.

[Explanation of symbols]

 1 Base 4 Operation Electromagnetic Device 5 Plunger 12 Link 15 Moving Contact 21 Fixed Contact 26 Control Circuit Switch 28 Operation Lever 30 Leaf Spring 31 Spacer

Claims (1)

[Claims] 1. A fixed contact and a movable contact for opening and closing a load circuit, a polar operation electromagnet device for driving the movable contact,
A control switch for controlling the operation electromagnet device, an operation lever for opening and closing the control switch in conjunction with a plunger performing forward and reverse motions in the operation electromagnet device, and the movable contact in association with the plunger. A remote control relay having a link that opens and closes, characterized in that a leaf spring that acts as a reaction force when the plunger is attracted is provided on the attraction surface of the plunger.