JPH0249666B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a fault indicator, and more particularly to a fault indicator that operates a magnetically driven switch for a short period of time during operation of the device.

[Background of the invention]

Examples according to the prior art will be explained with reference to FIGS. 1 to 5.

Figure 1 shows the front side of the fault indicator. There is a display window 1A and a return lever hole 1B in the center of the case 1, and a display board return lever 1 is located in the return lever hole 1B.
There is 0E. FIG. 2 shows the internal mechanism of the failure indicator, and the mechanism part disposed on the base 2 is housed in the case 1, and is designed to display information on the display window 1A on the front surface of the case 1.

When a failure occurs, a failure response relay (not shown)
When the contact is closed and the power supply voltage is applied to the coil terminal 3, the operating coil 6 is excited through the coil lead 4 connected to the coil terminal 3. The operating coil 6 is wound around the bobbin 5, and an inverted L-shaped yoke 7 is arranged below the bobbin 5, and an armature shaft is attached to the inverted L-shaped front part 5A below the bobbin 5. 1
An armature 9 is attached so that it can rotate at 1. Further, an iron core 8 is arranged at the center of the bobbin 5,
Its rear part is connected to a yoke 7.

On the other hand, at the rear part 5B of the bobbin 5, there is a display plate shaft 12.
A display board 10 is attached so that it can be rotated at. The base 2 also includes an upper fixed contact piece 14.
A, upper movable contact piece 15A, lower fixed contact piece 14
B. A lower movable contact piece 15B is arranged, and when there is no external force, the fixed contact piece and the movable contact piece come into contact with each other due to the elasticity of the movable contact piece.

When the operating coil 6 is excited by the operation of the device, a magnetic path is formed by the iron core 8 made of a magnetic material, the yoke 7, and the armature 9, and the armature 9 is attracted to the iron core 8, but the operation When coil 6 is not energized, return spring 1
3, the armature 9 is separated from the iron core 8, and the projection 9A of the armature 9 hits the yoke 7 and stops.

In the display board 10, the display board holding piece 10D is connected to the armature 9.
Under normal conditions, it is prevented from falling, and also engages with the upper movable contact insulation 16A at the tip of the upper movable contact piece 15A, and the upper fixed contact piece 14A
, the upper movable contact piece 15A is separated.

The display board 10 has a normal display section 10A and a failure display section 10B, which can be distinguished by painting or the like.

When a failure occurs, the armature 9 is attracted to the iron core 8, the engagement between the armature 9 and the display board holding piece 10D is released, and the display board 10 falls due to gravity. When the display board 10 falls and the engagement between the display board 10 and the upper movable contact piece insulation 16A is released, the upper fixed contact piece 14A and the upper movable contact piece 15A come into contact.

Upper fixed contact piece 14A and lower fixed contact piece 14
B is connected by a connecting line 17. Upper fixed contact piece 14A, upper movable contact piece 15A, lower fixed contact piece 14B, lower movable contact piece 15B, connection line 17
are made of a conductor, so while the display board 10 is falling, the upper movable contact piece 15A, the upper fixed contact piece 14A, the connection wire 17, the lower fixed contact piece 14B,
The lower movable contact piece 15B is electrically closed and can send a signal to an external circuit, as shown in FIG. 3.

When the display board 10 further falls due to gravity from the state shown in FIG.
The arm portion 10C of the bobbin 5 rests against a protrusion 5C on the inverted L-shaped front portion of the bobbin 5. At this time, the contact between the lower fixed contact 14B and the lower movable contact 15B is separated, so the signal to the external circuit is cut off and the display window 1
A failure display section 10B of the display board 10 is displayed. This state is shown in FIG.

Due to failure recovery, failure response relay (not shown)
When it returns, the operating coil 6 becomes non-excited, and the armature 9 is separated from the iron core 8 by the return spring 13. This state is shown in FIG. When the display board return lever 10E of the display board 10 is pushed upward from this state, the armature 9 compresses the return spring 13 by the amount that the armature 9 engages with the display board holding piece 10D. When the armature 9 rises further upward, the return spring 13 returns the armature 9 to the position where the armature protrusion 9A touches the yoke 7, and the display board return lever 10
Even if the external force pushing up E is removed, display board 1
Since the armature 9 and the display plate holding piece 10D engage with each other, the display plate 10A is held in a position where the display plate 10A is normally displayed on the display window 1A, resulting in the state shown in FIG. 2 before the failure occurs.

In the fault indicator configured in this manner, the contact devices that generate a signal when a fault occurs are the upper fixed contact piece 14A, the upper movable contact piece 15A, the lower fixed contact piece 14B, and the lower movable contact piece 15B. Two sets are required, which has the disadvantage of increasing the number of parts, reducing the reliability of the failure indicator, and increasing the cost.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a fault indicator in which a single set of contact devices generates a signal in the event of a fault.

[Summary of the invention]

In the present invention, when a failure occurs, a magnetic drive switch is operated by the magnetic flux of an operating coil, and a magnetic induction piece is operated by a display board that falls due to the operation of an armature.
It is designed to generate a signal that restores the operation of the magnetically driven switch.

[Embodiments of the invention]

Examples according to the present invention will be explained with reference to FIGS. 6 to 11.

FIG. 6 shows the front side of the fault indicator. There is a display window 1A and a return lever hole 1B in the center of the case 1, and a display plate return lever 1 is located in the return lever hole 1B.
There is 0E. FIG. 7 shows the internal mechanism of the failure indicator. The mechanism part arranged on the base 2 is housed in the case 1, and is adapted to display information on the display window 1A on the front side of the case 1.

When a failure occurs, a failure response relay (not shown)
When the contact is closed and the power supply voltage is applied to the coil terminal 3, the operating coil 6 is excited through the coil lead 4 connected to the coil terminal 3. The operating coil 6 is wound around the bobbin 5, and an inverted L-shaped yoke 7 is arranged below the bobbin 5, and the armature shaft 1 is attached to the inverted L-shaped front part 5A at the tip of the bobbin 5.
An armature 9 is attached so that it can rotate at 1. Further, a display plate 10 is attached to the rear portion 5B of the bobbin 5 so as to be rotatable about a display plate shaft 12.

Therefore, when the working coil 6 is excited, a magnetic path is formed by the iron core 8 made of a magnetic material, the yoke 7, and the armature 9, and the armature 9 is attracted to the iron core 8, but the working coil 6 When is not energized, the armature 9 is pulled away from the iron core 8 by the return spring 13, and the projection 9A of the armature 9 hits the yoke 7 and stops.

In the display board 10, the display board holding piece 10D is connected to the armature 9.
Under normal conditions, it is prevented from falling. Further, the display board 10 has a normal display section 10A and a failure display section 10B, which can be distinguished by painting or the like.

Between the front part 5A and the rear part 5B of the bobbin 5, a pair of conductive magnetic leads 18A and 18B are made so as to be elastically movable, and are provided with appropriate overlap and spacing, and are connected to the tube 18C. An encapsulated magnetically driven switch 18 is arranged.

The structure of the magnetic drive switch 18 is shown in FIG.

The conductive magnetic leads 18A and 18B of this magnetically driven switch 18 are connected to the contact leads 2, respectively.
1 is connected to the contact terminal 20 so that it can be connected to an external circuit.

When a failure occurs, the operating coil 6 forms a magnetic path with the yoke 7, iron core 8, and armature 9. At this time, the magnetic flux generated from the operating coil 6 causes the conductive magnetic leads 18A, 1 enclosed in the magnetic drive switch 18 disposed near the operating coil 6 to
8B becomes magnetized, attracts each other, and comes into contact with each other to form a signal circuit. At this time, since the armature 9 is attracted to the iron core 8, the engagement between the armature 9 and the display plate holding piece 10D is disengaged, and the display plate 10 falls due to gravity, causing the inverted L-shaped front part of the bobbin 5 to fall. The arm portion 10C of the display board 10 comes into contact with the protrusion 5C and comes to rest.

Since the magnetic induction piece 19 is arranged in a part of the arm portion 10C of the display board 10, the magnetic induction piece 19 also falls when the display board 10 falls, and the magnetic induction piece 19 falls between the magnetic drive switch 18 and the operating coil 6. In order to enter, the magnetic flux generated from the working coil 6 passes through the magnetic induction piece 19. Therefore, the effect of the magnetic flux on the magnetically driven switch 18 is eliminated, the operation of the magnetically driven switch 18 is restored, and the signal circuit is released. At this time, display window 1
The display of A is from the normal display section 10A to the failure display section 1.
Changes to 0B. This state is shown in FIG.

Due to failure recovery, failure response relay (not shown)
When it returns, the operating coil 6 becomes non-excited, and the armature 9 is separated from the iron core 8 by the return spring 13. This state is shown in FIG.

When the display board return lever 10E of the display board 10 is pushed upward from the state shown in FIG.
The return spring 1 is removed by the amount that engages with the display board holding piece 10D.
3 is compressed, but the display plate holding piece 10D is compressed by the armature 9.
When the armature 9 rises further upwards, the armature 9 returns to the return spring 13.
As a result, the armature protrusion 9A returns to the position where it touches the yoke 7, and even if the external force pushing up the display board return lever 10E is removed, the armature 9 and the display board holding piece 10D of the display board 10 are engaged. The display window 1A is held at a position where the normal display section 10A is displayed, resulting in the state shown in FIG. 7 before the failure occurs.

According to one embodiment of the present invention, the contact device constituting the signal circuit can be implemented with one set of magnetic drive switches 18, the number of parts is reduced, and the failure indicator is highly reliable and inexpensive. There are effects that can be produced.

In this embodiment, the magnetic induction piece is made of a magnetic material, but a permanent magnet is attached to the magnetic induction piece at a position adjacent to the magnetically driven switch to generate a magnetic flux with a polarity opposite to that of the operating coil, thereby controlling the operation of the magnetically driven switch. The same effect can be obtained since it is possible to restore the .

〔Effect of the invention〕

According to the present invention, the contact device constituting the signal circuit can be implemented with one set of magnetically driven switches. Therefore, the number of parts constituting the fault indicator can be reduced, making it highly reliable and inexpensive. There are effects that can be produced.

[Brief explanation of drawings]

FIG. 1 is a front view of a failure indicator according to the prior art, and FIG. 2 is a side view showing the internal mechanism of FIG. 1 in a normal state. FIG. 3 shows a state in which the display board is falling due to the occurrence of the failure shown in FIG. FIG. 4 shows a state in which the dropping operation of the display board in FIG. 3 has been completed.
FIG. 5 shows a state in which the failure has been recovered from the state shown in FIG. FIG. 6 is a front view of the fault indicator according to the present invention, and FIG. 7 is a side view showing the internal mechanism of FIG. 6 in a normal state. Figure 8 shows the state at the time of the failure in Figure 7. Figure 9 shows the state in which the failure has been recovered from the state in Figure 8. Figure 10 shows the failure shown in Figure 9 from the bottom. Shows the internal mechanism of the display. FIG. 11 shows the structure of the magnetic drive switch. 1...Case, 1A...Display window, 1B...Return lever hole, 2...Base, 3...Coil terminal, 4...Coil lead, 5...Bobbin, 5A...Bobbin front, 5B...Bobbin rear, 5C...Bobbin protrusion, 6 ...Operating coil,
7... Yoke, 8... Iron core, 9... Armature, 9A... Armature protrusion, 10... Display board, 10A... Display board normal display section, 10B... Display board failure display section, 10C... Display board arm, 10D ...Display board holding piece, 10E...Display board return lever, 11...Archive shaft, 12...Display board shaft, 1
3... Return spring, 14A... Upper fixed contact piece, 14B
...Lower fixed contact piece, 15A...Upper movable contact piece, 1
5B...lower movable contact piece, 16A...upper movable contact piece insulation, 16B...lower movable contact piece insulation, 17...connection line, 18...magnetic drive switch, 18A...magnetic lead, 18B...magnetic lead, 18C...tube, 19... Magnetic induction piece, 20... Contact terminal, 21...
contact lead.

Claims (1)

[Claims] 1 A controlled device, an electromagnet that is energized by the operation of this device and is energized continuously while the device is in operation, a display board that is allowed to fall due to the energization of this electromagnet, and a display board that is energized by the electromagnet and operates. When the device is operated, the magnetic drive switch is operated, and when the display board falls, the magnetic induction piece is operated and the magnetic drive switch is operated. A fault indicator that is characterized by being reset.