JPH0641317Y2 - Electromagnetic relay - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION << Field of the Invention >> The present invention relates to an electromagnetic relay suitable for visually recognizing a contact state.

<Outline of the Invention> This invention is configured to open a monitoring window on the top plate of a box-type base that covers the fixed contact plate and the movable contact plate so that the contact position can be visually confirmed as the movable contact plate is displaced. However, it is intended to easily confirm each contact.

《Prior art and its problems》 Conventionally, in the switch operation of the electromagnetic relay, due to the displacement of the armature accompanying the excitation or demagnetization of the coil, a plurality of contact circuits which are implanted in a non-conductive base and are in an insulated state from each other are used. This is done by switching.

Now, this will be described with reference to the electromagnetic relays shown in FIGS. 6 and 7. In the case 13, the coil 2 is vertically arranged on one side of the bottom plate 1 and the coil core wire pulled out from the coil 2. Case bottom plate 1 is at the start side and the end side of 2a.
Is connected to the coil terminal 3 implanted in the.

An armature 5 urged by a hinge spring 4 is attached to the upper side of the coil 2 so that the armature 5 can come into contact with and separate from the magnetic pole surface 2b of the coil 2. A movable piece 6 is attached so as to operate.

Further, in the box-shaped base 7 mounted on the other side of the case bottom plate 1, a pair of fixed contact plates 9 and 9 and the fixed contact plates 9 and 9 are provided.
A movable contact plate 10 is disposed between the contact plates 9 ...
The terminals 8 of ... Are planted on the bottom surface of the base 7 and the case bottom plate 1.

In addition, a card 11 whose one end is joined to the lower end of the movable piece 6 is inserted into the base 7, and the card 11 is a box-shaped base along with the operation of the movable piece 6. It is mounted so as to move forward and backward in the space 7.

When the electromagnetic relay is energized, the amateur 5 is attracted to the magnetic pole surface 2b of the excited coil 2,
The movement of the movable piece 6 accompanying the displacement of the armature 5 causes the card 11 to move horizontally within the base 7, and the horizontal movement of the card 11 causes the movable contact plate 10 to separate from one fixed contact plate 9. Then, the other fixed contact plate 9 is pressed.

When the coil 2 is de-energized, the magnetic pole surface is demagnetized, the armature 5 is separated from the magnetic pole surface 2b by the hinge spring 4, and the movement of the movable piece 6 causes the card 11 to return to the original state. Move and therefore the other fixed contact plate 9
The movable contact plate 10 that has been pressed against is returned so as to be joined to one of the fixed contact plates 9, and the switch switching operation is performed.

By the way, in such an electromagnetic relay, when the contact plates 9 ..., 10 ... are loose, the positions of the contacts 9a ..., 10a. If the contacts 9a ..., 10a ... Of the contact plates 9 ..., 10 ... are worn or damaged, it may not be possible to make a good contact and cause a malfunction during contact operation.

When a malfunction occurs in an electronic device, it is necessary to quickly find out which electromagnetic relay contact is obstructed and repair it.In order to ensure stable operation of the device, the degree of wear and damage to each contact It is also necessary to carry out regular maintenance and inspection.

However, in this type of electromagnetic relay, since each contact plate is shielded by the base top plate, there is a problem that the state of each contact cannot be visually recognized from above the base. It has (see FIG. 6).

Of course, the visual recognition from the side direction is possible, but the visual recognition from the side direction becomes impossible in the densely mounted state.

<Purpose of the Invention> The present invention has been made in view of the above-mentioned problems, and the purpose thereof is, in particular, the contact state of each contact plate located below the base top plate, and An object of the present invention is to provide an electromagnetic relay in which a contact operation state can be easily visually recognized from a position above the base.

<< Constitution and Effect of the Invention >> In order to achieve the above-mentioned object, the present invention has a plurality of electrically insulated fixed contact plates and movable contact plates which are insulated from each other in a non-conductive box base. In the electromagnetic relay in which the contact circuits are formed and the contact circuits are switched by the displacement of the armature caused by the excitation or demagnetization of the coil, the base plate of the base corresponding to the movable contact plate is connected to the movable contact plate. It is characterized by the opening of a monitoring window that allows the user to visually check the contact point position due to displacement.

That is, according to the present invention, since the monitoring window for the movable contact plate is formed on the top plate of the box-shaped base that covers the fixed contact plate and the movable contact plate, the movable contact plate is opened through this monitoring window. The contact position due to displacement can be easily checked, and even if a malfunction occurs in the electronic device, the contact that is causing the malfunction can be found through the monitoring window, so repair work can be performed quickly and easily. be able to.

Further, since the degree of wear and the degree of damage of each contact can be visually confirmed, it is possible to easily perform a periodic inspection and the like, and it is also advantageous in terms of stable management of the device.

<< Description of Embodiments >> Hereinafter, details of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a plan view showing an electromagnetic relay according to the present invention, and FIG.
The drawing shows a sectional view taken along the line II in FIG. The same members as those of the related art are designated by the same reference numerals, and detailed description thereof will be omitted.

In the figure, reference numeral 1 denotes a bottom plate of a case 13. On one side of the bottom plate 1, a coil 2 having a coil core wire 2a wound around an outer circumference of a bobbin is vertically arranged and is drawn out from the coil 2. The starting end side and the terminating end side of the coil core wire 2a are connected to the coil terminals 3 embedded in the case bottom plate 1.

An armature 5 urged by a hinge spring 4 is attached to the upper side of the coil 2 in such a manner that the armature 5 can be brought into contact with and separated from the magnetic pole surface 2b of the coil, and the armature 5 operates as the armature 5 is displaced. The movable piece 6 is attached so as to operate.

Reference numeral 7 denotes a base mounted on the other side of the bottom plate 1, and this base 7 is formed in a hollow box shape, and fixed contact plates 9 ... The columns of the movable contact plates 10 ... And the projecting walls 7a ..., 7b.

Further, a plurality of terminals 8 ... Are planted on the bottom surfaces of the case bottom plate 1 and the base 7, and the respective terminals 8 ...
Are connected to a pair of fixed contact plates 9 and 9 in the base 7 and a movable contact plate 10 arranged between the fixed contact plates 9 and 9.

11 is a card, and this card 11 is the movable piece 6 described above.
One end of the movable contact plate 10 is joined to the lower end of the movable base 6 so as to move back and forth horizontally in the box-shaped base 7 as the movable piece 6 moves. Switching contact is made from the plate 9 to the other fixed contact plate 9.

On the other hand, the top plate of the base 9 is provided with a rectangular monitoring window through which the movable contact plate 10 provided on the lower surface side of the base 7 can be confirmed.

A transparent case 13 is attached to the outer periphery of the bottom plate 1 to cover the relay body.

Since the invention of the present application is configured as described above, when the electromagnetic relay is energized, the armature 5 is attracted to the magnetic pole surface 2b of the excited coil 2 and the movable piece 6 is moved by the displacement of the armature 5. By the operation, the card 11 moves horizontally in the base 7, and by the horizontal movement of the card 11, the movable contact plate 10 is separated from one fixed contact plate 9 and pressed to the other fixed contact plate 9. To be done.

When the coil 2 is de-energized, the magnetic pole surface 2b is demagnetized, the armature 5 is separated from the magnetic pole surface 2b by the hinge spring 4, and the movement of the movable piece 6 causes the movement of the card.
11 moves horizontally to the original state, so that the movable contact plate 10 pressed by the other fixed contact plate 9 is returned to one fixed contact plate 9 and the switch switching operation is performed. Such contact operation can be visually confirmed through a monitoring window 12 opened on the top plate of the box-shaped base 7 covering the fixed contact plate 9 and the movable contact plate 10.

As described above, according to the electromagnetic relay according to the present invention, it is possible to easily confirm the contact position due to the displacement of the movable contact plate by the monitoring window provided on the base top plate. Even when a malfunction occurs, the contact that is the cause of the malfunction can be found through the monitoring window, and the repair work can be performed quickly and easily.

In addition, since the degree of wear and damage of each contact can be visually checked, periodic inspections can be easily performed, and the safety management of the device is excellent.

Next, a second embodiment of the present invention will be described with reference to FIGS. 3 and 4.

That is, in this embodiment, a projecting piece 14 that appears in the monitoring window 12 when the coil is energized is bent and formed in the corner portion of the upper edge of the movable contact plate 10, and the projecting piece 14 is formed on the monitoring window 12. The small window 15 for visual recognition is attached.

Therefore, when the movable contact plate 10 is operating normally when the coil is energized, as shown in FIG.
The projecting piece 14 provided on the upper part of 10 appears in the small window of the monitoring window 12, and since it has a display function of the normal operation of the movable contact plate 10, it is possible to more easily confirm the contact operation.

Furthermore, what is shown in FIG. 5 is a third embodiment of the present invention, and in this embodiment, the end number 16 ... Or the end polarity 17 ... Is displayed around the monitoring window 12. With this configuration, there is an effect that the operating state of the circuit can be confirmed.

[Brief description of drawings]

FIG. 1 is a plan view showing the present invention, and FIG. 2 is II in FIG.
FIG. 3 is a partially broken view showing the movable contact plate in the second embodiment according to the present invention, FIG. 4 is an explanatory view showing the operation of the movable contact plate in the same embodiment, and FIG. FIG. 6 is a plan view showing a third embodiment according to the present invention, FIG. 6 is a plan view showing a conventional electromagnetic relay, and FIG. 7 is a sectional view taken along the line II-II in FIG. 1 ...... Bottom plate 2 ...... Coil 9 ...... Fixed contact plate 10 ...... Moving contact plate 12 ...... Monitoring window 14 ...... Projection piece 15 ...... Small window 16 ...... Terminal number 17 ...... Terminal polarity

Claims (1)

[Scope of utility model registration request] 1. A fixed contact plate and a movable contact plate are implanted in a non-conductive box base to form a plurality of contact circuits insulated from each other, and these contact circuits are used for exciting or demagnetizing a coil. In the electromagnetic relay that can be switched by the displacement of the accompanying amateur, a monitoring window is provided on the top plate of the base corresponding to the movable contact plate so that the contact position due to the displacement of the movable contact plate can be visually confirmed. Electromagnetic relay.