JPH0729480A - Display device for leak and circuit breaker using it - Google Patents

Abstract

PURPOSE:To provide a display device for lead which can be thinned while improving display performance by providing an electromagnet having a yoke, a coil and a movable iron piece, and positioning the movable iron core in such a manner that the display part is changed in parallel to a display window. CONSTITUTION:A movable iron piece 9 is formed into an U-shape by opposed pieces 9a, 9b and a connecting piece 9c for mutually connecting them, and the opposed pieces 9a, 9b have support holes 9d, 9d forming rotating supporting points. In the movable piece 9, the support holes 9d, 9d are rotatably supported to a frame in such a manner that the connecting piece 9c can be attracted to or separated from the end surfaces of the opposed leg piece corresponding parts 3a, 3b of both yoke pieces 3, 4. When the movable iron piece 9 is separated from a yoke 2, a reset part 9e makes contact with the frame to regulate its position. A display member 10 is moved to the state where a circuit breaker is not seen through the display window and the state where it can be seen, or the visual state is changed to display the generation of a leak.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device for electric leakage suitable for use in a circuit breaker having a function of displaying an abnormal state such as electric leakage.

[0002]

2. Description of the Related Art As a display device of this type such as an electric leakage, the one disclosed in Japanese Utility Model Publication No. 55-121444 is known. In this device, a movable iron piece provided with a yoke, a coil wound around the yoke, and a display unit for displaying the occurrence of the electric leakage is attracted to the yoke by energizing the coil in response to the occurrence of the electric leakage. When a leakage or the like occurs, the display portion can be visually recognized from a display window such as a circuit breaker. Although this one fulfills the basic function of displaying leakage current, etc., it is difficult to see that the inside of the circuit breaker is visibly unsightly or in a normal state at normal times, that is, when the display is not visible through the display window. there were.

As a means for solving such problems,
The one disclosed in JP-A-62-105334 has been proposed. This one is basically similar to the one described above, but in a normal state, that is, the display portion (in the specification, a member substantially corresponding to the movable iron piece is called a display lever, and a part thereof is referred to as a display lever). When the (yellow color) is not visible from the display window, make the coil (in that specification referred to as the earth leakage trip coil) visible and attach the green tape to that location, This solves the above-mentioned problems.

[0004]

The above-mentioned display device for electric leakage and the like can be improved in display performance because it is easy to understand that it is in a normal state, and the unsightly interior of the circuit breaker is hidden to improve the appearance performance. It was However, if the area of the display is enlarged to make it easier to see the display of the normal state or abnormal state, the movable iron piece (including the display lever) rotates, so the length from the rotation fulcrum to the display Must be made larger, and the thickness direction of the display device (thickness direction of the circuit breaker, etc.) also becomes larger, and the circuit breaker, etc. becomes larger. Further, since the electromagnet is a non-polar type that does not use a permanent magnet, the power consumption of the coil is large and the magnetic efficiency is not good. Further, the work of sticking the tape is troublesome and the workability of assembling is not good as a whole. Further, when a short-circuit accident occurs, dust scattered in the circuit breaker may adhere to the coil or the movable iron piece, which may cause disconnection of the coil or impair normal operation of the movable iron piece.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a display device such as an electric leakage for solving the following problems. That is, it is possible to reduce the thickness while improving the display performance, the appearance performance is good, the assembling workability is good, the magnetic efficiency is improved, and the failure is hard to occur. Also,
It is an object of the present invention to provide a circuit breaker having various advantages described above.

[0006]

In order to solve the above-mentioned problems, a display device for earth leakage or the like according to claim 1 comprises a yoke,
A coil wound around the yoke, and a movable iron piece that is provided with a display section that displays the occurrence of the electric leakage by suctioning and separating from the yoke by controlling the energization of the coil according to the occurrence of the electric leakage. In a display device for electric leakage, etc., which is provided with an electromagnet having, and is arranged in a circuit breaker or the like so that the visible state of the display part from the display window of the circuit breaker or the like can be changed, The movable iron piece is positioned so as to be displaced in parallel with respect to.

A display device for leaking electric current according to a second aspect is a substrate having a portion for fixing the yoke of the electromagnet according to the first aspect and rotatably supporting the movable iron piece, and having a portion which does not overlap with the yoke and the coil. And a frame formed so that a portion of the substrate portion that does not overlap with the coil and the coil can be positioned in the display window in an overlapping manner.

Further, in the display device for electric leakage according to claim 3, the movable iron piece according to claim 2 is provided with a reset portion extending from the frame with a constant length.

Further, the display device for electric leakage or the like according to claim 4 has a structure in which the movable iron piece according to claim 2 or 3 is provided with a switch pressing portion protruding from the frame with a constant length.

According to a fifth aspect of the present invention, there is provided a display device for electric leakage or the like, wherein the frame according to the third or fourth aspect is formed into a box shape in which the reset portion and / or the switch pressing portion of the movable iron piece is movably projected. It has a formed structure.

According to a sixth aspect of the present invention, there is provided a display device for electric leakage or the like, in which the display section according to the first to fifth aspects is formed by a display member having a shape corresponding to a display window.

Further, the display device for electric leakage and the like according to claim 7 is configured such that the display portion according to claims 1 to 6 and the portion of the substrate portion where the yoke and the coil do not overlap are colored differently.

According to an eighth aspect of the present invention, there is provided a display device for electric leakage or the like, in which the electromagnets according to the first to seventh aspects are of a polar type including permanent magnets, and the movable iron piece is normally attracted to the yoke and coiled. The spring is biased so as to separate from the yoke when electricity is applied to.

According to a ninth aspect of the present invention, there is provided a display device for electric leakage or the like, wherein the yoke according to the eighth aspect has a substantially U-shaped configuration including an opposed leg piece and a connecting piece, and is connected to a portion corresponding to the opposed leg piece. The first yoke piece and the second yoke piece having an L-shape having a one-piece corresponding portion
In the yoke piece, both connecting piece corresponding portions are superposedly positioned, and a permanent magnet is interposed between both connecting piece corresponding portions.

According to a tenth aspect of the present invention, there is provided a display device for electric leakage or the like, wherein a thin spacer is provided between the end surface of the connecting piece corresponding portion of the first yoke piece and the second yoke piece and the opposing leg piece. It has an intervening configuration.

The display device for electric leakage or the like according to claim 11 comprises a coil frame having a wide flange part around which the coil according to claim 9 or 10 is wound, and the first part is provided on the flange part. The yoke support and the second yoke support are configured to have a penetrating support part through which the corresponding leg part corresponding to the opposing leg penetrates.

A circuit breaker according to a twelfth aspect of the invention is a circuit breaker according to any one of the first to eleventh aspects of the invention.
The movable iron piece is incorporated so that it can be reset by operating the handle.

According to a thirteenth aspect of the circuit breaker, the handle and the movable iron piece according to the twelfth aspect are linked by a transmission member having elasticity.

[0019]

According to the structure of claim 1, even if the display portion is enlarged, the display device is enlarged only in the direction parallel to the display window, and the thickness direction of the display device (such as a circuit breaker) is increased. (Thickness direction) does not increase.

According to the second aspect of the present invention, even if the display portion cannot be seen from the display window, it can be seen from the display window if the frame is formed of a material of an appropriate color. Therefore, the display performance and the appearance performance are not deteriorated.

According to the third aspect of the invention, the shape of the handle for resetting the movable iron piece in response to the operation of the handle or the member responsive thereto can be simplified.

Further, according to the structure of the fourth aspect, by providing the switch whose opening and closing is controlled by the switch pressing portion, it is possible to output the signal in which the abnormality such as the electric leakage occurs.

According to the structure of claim 5, the coil and the movable iron piece are protected, and the cause of the failure can be reduced.

Further, according to the structure of claim 6, it is not necessary to change the shape of the movable iron piece according to the shape of the display window,
Only the display member needs to be changed.

According to the configuration of claim 7, the display of the normal state and the abnormal state is easy to see, and the display performance and the appearance performance are good.

According to the structure of claim 8, the movable iron piece is attracted to the yoke by the magnetic flux of the permanent magnet when the display portion is seen from the display window in the normal state, and a small current is supplied in the abnormal state. The movable iron piece can be separated from the yoke simply by flowing the coil to the coil.

According to the ninth aspect of the invention, since the magnetic flux generated by the current flowing through the coil in the abnormal state flows through the magnetic path that does not pass through the permanent magnet, the current flowing through the coil can be made smaller.

Further, according to the structure of the tenth aspect, optimum magnetic characteristics can be obtained by adjusting the thickness of the spacer.

According to the eleventh aspect, the structure of the yoke and the coil frame becomes strong.

According to the twelfth aspect of the invention, a circuit breaker can be obtained that makes use of the various advantages of the display device for earth leakage and the like according to the first to eleventh aspects.

Further, according to the structure of claim 13,
The reset operation of the movable iron piece and the opening mechanism of the circuit breaker by the operation of the handle is performed more reliably.

[0032]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of a display device for leaks and the like according to the present invention will be described below with reference to FIGS. This display device for leaking electric current has a polar type electromagnet 1 having a yoke 2, a permanent magnet 5, a coil 7 wound around a coil frame 8 and a movable iron piece 9.
And the frame 12 as main constituent members.

The yoke 2 has a substantially U-shape formed by the opposing leg piece and the connecting piece, and more specifically, a first L-shape.
It consists of a yoke piece 3 and a second yoke piece 4. Both yoke pieces 3,
4 is the opposite leg equivalent parts 3a, 4a and the connecting leg equivalent parts 3b, 4
Although it has b, the portion 3a corresponding to the opposite leg piece of the first yoke piece 3 is longer than the portion 4a corresponding to the opposite leg piece of the second yoke piece 4. Therefore, when the front end surfaces of the opposing leg piece corresponding portions 3a, 4a are aligned, the connecting piece equivalent portions 3b, 4b are superposedly positioned and a constant gap is formed. Then, the permanent magnet 5 is inserted between the gaps, that is, the portions 3b and 4b corresponding to both connecting pieces. Permanent magnet 5
Are magnetized in the direction of the portions 3b and 4b corresponding to both connecting pieces.

Reference numeral 6 denotes a spacer, which is in the form of a thin plate, and is formed on the end surface of the connecting piece equivalent portion 4b of the second yoke piece 4 and the first yoke piece 3.
It is interposed between the opposite leg piece 3a and the opposite leg piece 3a. This spacer 6
Adjusts its thickness to adjust the magnetic resistance of the magnetic path as described later.

The coil 7 is wound around the coil frame 8, and the energization from the abnormal current detection circuit (not shown) is controlled according to the occurrence of leakage or the like. That is, the current does not normally flow, but the current flows when a leakage or the like occurs. Coil frame
8 is a wide collar at both ends of the winding body around which the coil 7 is wound.
8a and 8a are eccentrically arranged with respect to the winding drum section and are connected in series. This collar part 8
a and 8a are the portions 3a and 4a corresponding to the opposite leg pieces of both yoke pieces 3 and 4, respectively.
The penetrating support portions 8b, 8b are formed so as to penetrate therethrough. One of the penetrating support portions 8b penetrates through the center of the winding drum portion, that is, the center of the coil 7, and accordingly, the opposing leg piece equivalent portions 3a, 4
The coil 7 is wound around the yoke 2 by penetrating one side of a. Reference numerals 8c and 8c denote screw through holes into which fixing screws are inserted when fixing to a frame described later.

The movable iron piece 9 is formed in a U-shape by the facing pieces 9a and 9b and the connecting piece 9c connecting these pieces, and the facing pieces 9a and 9b are provided with support holes 9d and 9d serving as pivot points. . Further, one of the facing pieces 9a, 9b is provided with a locking portion for locking one end of a spring described later. Further, one facing piece 9b is a reset portion 9e in which a portion having a support hole 9d is further extended outward.
have. This movable iron piece 9 is supported in a state in which the support holes 9d and 9d are rotatable in a frame described later so that the connecting piece 9c is sucked and separated from the end faces of the corresponding leg pieces 3a and 4a of the two yoke pieces 3 and 4. To be done. Further, when the movable iron piece 9 is separated from the yoke 2, the reset portion 9e comes into contact with a frame described later, and the position thereof is regulated. Reference numeral 10 denotes a display member, which is made of, for example, yellow plastic and is formed on the facing piece 9a so as to have a circular shape in plan view. The display member 10 moves to a state invisible or visible from the display window 21 such as a circuit breaker, that is, the state of visual recognition is changed to display the occurrence of leakage or the like. That is, the display member 10 includes the facing piece 9a of the movable iron piece 9.
When the movable iron piece 9 is positioned, it is important to position the movable iron piece 9 because it is displaced in parallel with the display window 21. Reference numeral 11 is a spiral spring that biases the movable iron piece 9 away from the yoke 2.

The frame 12 is made of, for example, green plastic, a base plate 12a for fixing the coil frame 8 in which the yoke 2 is integrated, a support shaft 12b for supporting the movable iron piece 9, and a lock for locking the other end of the spring 11. The part 12c, the position restricting part 12d for restricting the position of the movable iron piece 9, and the like are molded. Board part 12a
Has a portion which is sufficiently larger than the planar size of the coil 2 including the yoke 2 and the coil frame 8 and therefore does not overlap with these by biasing and fixing them. Then, when the frame 12 is incorporated in the circuit breaker, the non-overlapping portion is arranged so as to overlap the display window 21. The movable iron piece 9 described above has support holes 9d, 9
The reset portion 9e projects from the frame 12 by a certain length in a state where d is fitted and supported by the support shaft 12b.

Since the frame 12 has a support shaft 12b, a locking portion 12c, and a position regulating portion 12d which are erected orthogonally with respect to the base plate portion 12a, the assembling work described later is extremely easy. In particular, the position of the movable iron piece 9 is obtained with high accuracy, and the operation is stable.

A display device such as an earth leakage comprising such a member is
Assemble as follows. First, the yoke 2 and the coil frame 8
, Then fix them to the base plate 12a of the frame 12, then fit the movable iron piece 9 and the spring 12 to the support shaft 12b of the frame 12, and attach one end of the spring 12 to the locking portion of the movable iron piece 9. , The other end is locked to the locking portion 12c of the frame 12, respectively. In this case, the reset portion 9e of the movable iron piece 9 projects from the frame 12 by a certain amount. Then, as shown in FIG. 2, the connecting piece 9c of the movable iron piece 9 is connected to a portion corresponding to the connecting piece of the yoke 2.
Suction to the end faces of 3b and 4b. In this case, the movable iron piece 9
Is attracted by the magnetic force of the permanent magnet 5, and therefore the spring force of the spring 12 is set to such an extent that this attraction is possible.

In the display device for electric leakage and the like assembled in this way, the movable iron piece 9 is separated from the yoke 2 and the reset portion 9e
When the position is restricted by the position restricting portion 12d of the frame 12, the display member 10 is incorporated in the circuit breaker so that the display member 10 is visible from the display window 21 of the circuit breaker.

FIG. 2 shows a normal state, in which the movable iron piece 9
The connecting piece 9c is attracted to the end surfaces of the leg-corresponding portions 3a, 4a of the yoke 2, and therefore the display member 10 for displaying the occurrence of an abnormal state such as an electric leakage is in a position invisible from the display window 21. As a result, the substrate portion 12a of the green frame 12, which is a normal display, can be seen through the display window 21.

FIG. 3 shows a state in which an abnormality such as an electric leakage has occurred. The current flowing in the coil 7 causes the movable iron piece to move.
9 is rotated to a position where the connecting piece 9c is separated from the end surfaces of the leg piece corresponding portions 3a, 4a of the yoke 2 and the reset piece 9e comes into contact with the position regulating portion 12d. In this case, the display member 10 is displaced parallel to the display window 21. As a result, the yellow display member 10, which indicates the occurrence of an abnormal state such as an electric leakage, can be seen from the display window 21.

The resetting of the movable iron piece 9 to the normal state is performed by operating the handle such as a circuit breaker so that the handle or a member responsive thereto displaces the reset portion 9e by a predetermined amount in the direction B of FIG. .

FIG. 4 schematically shows the magnetic circuit of the electromagnet. Magnetic flux φ1 of permanent magnet 5 is equivalent to permanent magnet 5 → first yoke piece 3 → movable iron piece 9 → second yoke piece 4 → permanent magnet 5 and permanent magnet 5 → first yoke piece 3 → same leg piece Department
3a → spacer 6 → connecting piece 4b of the second yoke piece 4 → the magnetic path of the permanent magnet 5. That is, the movable magnetic piece 9 is attracted by overcoming the spring force of the spring 11 by the magnetic flux flowing in the former magnetic path.

Next, when an abnormal state such as a leakage occurs, the coil
When the current is applied to 7, the magnetic flux φ2 is generated in the opposite direction to the magnetic flux φ1 in the direction of the second yoke piece 4 → the movable iron piece 9 → the first yoke piece.
It flows in the magnetic path of the leg equivalent part 3a of 3 → spacer 6 → second yoke piece 4. Therefore, the magnetic attraction force attracting the movable iron piece 9 decreases, the spring force of the spring 11 increases, and the movable iron piece 9 separates from the yoke 2.

As is clear from this magnetic circuit, the magnetic flux φ
Since 2 does not pass through the permanent magnet 5, the magnetic resistance of its magnetic path is small, so that the energizing current can be made small and the magnetic efficiency can be improved. Further, in setting the magnetic attraction force, the thickness of the spacer 6, that is, its magnetic resistance can be appropriately adjusted.

It should be noted that this embodiment can be modified in various ways when only thinning of the circuit breaker or the like is realized. That is, the frame 12 is not essential, but the yoke 2 and the coil 7
The movable iron piece 9 may be fixed or supported by an appropriate member so as to have such a positional relationship. In addition, the display member 10
Is not essential, and an appropriate color may be applied to a predetermined position of the movable iron piece 9. Also, the structure of the coil frame 8 is not limited. Further, the electromagnet 1 may be of non-polar type, and the polar type magnetic circuit is not limited. Further, as the current passed through the coil 7, it is possible to directly pass an abnormal current. In addition, each member can be appropriately selected according to the problem to be solved.

Next, a second embodiment of the present invention will be described with reference to FIGS. In this embodiment, the frame structure is different from that of the first embodiment, and other members are given the same reference numerals and their explanations are omitted.

The frame 12 of this embodiment is a frame main body.
The movable iron piece 9 is formed by combining the cover 13 and the cover 14.
The reset part 9e is formed in a box shape that is movably projected. The frame body 13 is a substrate portion 12a of the frame.
Side walls 13a, 13a, ... are erected from the four peripheral ends of the side wall so as to form a box shape with a single opening, and a side wall 13a corresponding to the support shaft 12b is formed with a notch 13b having a certain area, and a locking portion. The 12c and the position restricting portion 12d are connected to different side walls 13a and 13a, respectively.

The cover 14 is composed of a closed base portion 14a and a cutout closed portion 14b so as to close the entire opening of the frame main body 13 and most of the cutout portion 13b, and is located at a position corresponding to the display window 21 of the closed base portion 14a. The opening 14c corresponding to the shape is provided.
The notch blocker 14b is provided at the bottom of the notch 13b.
The movable iron piece 9 is designed so that the reset portion 9e of the movable iron piece 9 has a non-blocking portion that protrudes in a movable state. The opening 14
A plate-shaped member made of a highly transparent material, a lens, or the like may be fitted in c, or the entire cover may be made transparent.

FIG. 6 shows a normal state, and FIG. 7 shows an abnormal state such as an electric leakage. Since this is substantially the same as that of FIGS. 2 and 3 in the first embodiment, description thereof will be omitted. In addition, (a) of both figures illustrates a state in which the cover 14 is removed.

When a short circuit accident or the like occurs in a circuit breaker incorporating a display device such as an electric leakage, dust scattered in the circuit breaker adheres to the coil or the movable iron piece, and the coil breaks or breaks. It is possible to reduce the cause of the phenomenon that the normal operation of the movable iron piece is obstructed.

Incidentally, in forming the frame body 13 and the cover 14 into a box shape, the shape is not limited to that of the embodiment.

Next, a third embodiment of the present invention will be described with reference to FIGS. In this embodiment, the structure of the frame and the movable iron piece is different from that of the first embodiment, and other members are given the same reference numerals and the description thereof will be omitted.

In the movable iron piece 9 of this embodiment, a switch pressing portion 9f is continuously provided in a direction orthogonal to the facing piece 9b on the side of the substrate portion 12a of the frame 12 so that the switch 22 to be described later can be opened / closed. . The frame 12 has an opening portion through which the switch pressing portion 9f is inserted in the board portion 12a and does not hinder the operation thereof.
We have 12e. Therefore, the switch pressing portion 9f projects from the frame 12 with a constant length. Switch 22
For example, it is a micro switch, and is appropriately arranged in the circuit breaker at a position where opening / closing can be controlled in response to the operation of the switch pressing portion 9f.

FIG. 9 shows a normal state, and FIG. 10 shows an abnormal state such as an electric leakage. This is shown in FIG. 2 in the first embodiment.
3 and is substantially the same as that shown in FIG.

This device can output a signal notifying that an abnormality such as a leakage has occurred outside through an electric wire connected to the terminal of the switch 22.

The switch pressing portion 9f is a movable iron piece.
It may be formed integrally with 9, or may be formed separately and then integrated.

Next, a fourth embodiment of the present invention will be described with reference to FIGS. This embodiment is an example of a circuit breaker incorporating the display device for the electric leakage or the like of the second embodiment, and in particular, the reset operation of the electromagnet 1, that is, the movable iron piece 9 is surely performed.

In FIG. 11, reference numeral 12 is a frame that serves as an outer frame of a display device for electric leakage, 21 is a display window, 23 is a front case provided with the display window 21, 24 is a handle, 25 is a handle link,
26 is a movable contact block having a movable contact 27, and 28 is a part of the contact opening mechanism. The basic structure of the contact opening mechanism is a general one and is not the main part of the present invention, but the handle 24
It is reset by the operation of, and therefore the displacement of the handle link 25.

The handle link 25 has a reset drive section 25a for resetting the above-mentioned contact opening mechanism, and a transmission member linked to the movable iron piece 9 of the display device for electric leakage.
29 are provided. This transmission member 29 is made of an elastic plate material.
The base end is fixed to the reset drive unit 25a and the other end is a movable iron piece.
9 is formed so as to extend to a position where it engages with the reset portion 9e.

FIG. 12 shows a state immediately after resetting, and FIG. 13 shows an abnormal state such as a leakage. This is roughly the second
The transmission member 29 is added to FIGS. 6 and 7 in the embodiment. FIG. 12 shows a state immediately after the handle 24 is moved from the trip position to the OFF position, the reset driving unit 25a resets the contact opening mechanism, and the transmission member 29 resets the movable iron piece 9. That is, in FIG. 13, the handle 24, which has been in the ON position, has moved to the trip position in the trip operation state. That is, when the handle 24 is operated in the state shown in FIG. 13, the transmission member 29 moves in the B direction to rotate the movable iron piece 9 counterclockwise.
Then, when the handle 24 is moved to the ON position, that is, the normal position, the transmission member 29 moves leftward in the drawing, and a small gap is interposed between the transmission member 29 and the reset portion 9e.

In this case, since the transmission member 29 has elasticity, it is turned off (reset) from the trip position of the handle 24.
When moving to the position, the movable iron piece 9 is reset early during the movement, that is, even if the connecting piece 9c is attracted by the yoke 2, the reset drive unit 25a does not stop at that position and reaches the predetermined position. Move and reset the contact opening mechanism securely.

Next, a fifth embodiment of the present invention will be described with reference to FIGS. 14 and 15. In this embodiment, the handlebar link, the reset driving member, the transmission member and the like in the circuit breaker of the fourth embodiment are changed to improve the linkage with the abnormal current detection device.

Reference numeral 30 denotes an abnormal current detection block, which is a plunger
An electromagnet 31 having a protruding portion 32, a substantially L-shaped trip member 33 that reciprocates in response to the plunger 32, a reset piece 34 provided on the trip member 33, the plunger 32 and the trip member 33 are urged outward. And a trip link 36 that responds to the trip member 33 to drive the latch link in the part 28 of the opening mechanism. The handle link 25 has a base end portion as a rotation fulcrum, the handle 24 is coupled to the tip end portion, and a reset pressing portion 25b for pressing and driving the reset piece 34 is provided on a side surface of an intermediate portion.

The transmission member 29 linked to the movable iron piece 9 for the reset operation associated with the handle operation of the display device such as an electric leakage is replaced with the trip member instead of being provided on the handle link 25 in the fourth embodiment. It is provided in 33. The transmission member 29 is also formed by an elastic plate material so that the base end is fixed to the trip member 33 and the other end extends to a position where it engages with the reset portion 9e of the movable iron piece 9.

The normal state and the state of occurrence of an abnormality such as electric leakage are substantially the same as those in FIGS. 12 and 13 of the fourth embodiment. In FIG. 12 of the fourth embodiment, the transmission member 29 moves further in the normal state immediately after resetting, but in this embodiment the transmission member 29 is provided on the trip member 33, so the state immediately after resetting is maintained. Of.

In addition to the preferable operation described in the fourth embodiment, in this state, the spring force of the transmission member 29 is applied in the direction in which the movable iron piece 9 is attracted to the yoke 2 in the normal state, and vibration or shock is generated. This prevents the movable iron piece 9 from malfunctioning. Reset drive 25
Make sure that a moves to the specified position without stopping at that position and resets the contact opening mechanism securely.

The transmission member described in the embodiment of the circuit breaker may be provided on the movable iron piece of the display device for electric leakage. In addition, although it has been described above that various modifications can be made to the display device such as the electric leakage, an appropriate modification can be selected for the combination of these and the circuit breaker according to the problem to be solved.

[0070]

In the display device for electric leakage according to the first aspect, even if the display portion is enlarged, the display device only increases in the direction parallel to the display window. The thickness of the circuit breaker, etc. does not become large, thus making it possible to reduce the thickness while improving the display performance.

In addition to the effects of the first aspect of the invention, the display device for electric leakage and the like according to the second aspect forms a frame with a material of an appropriate color even when the display section is invisible from the display window. If this is done, it will be visible from the display window, and the display performance and appearance performance will not be degraded.

In addition to the effect of the second aspect, the display device for electric leakage or the like according to the third aspect can simplify the shape of the handle for resetting the movable iron piece according to the operation of the handle or the member responsive thereto.

In addition to the effect of the second or third aspect, the display device for leaks and the like according to claim 4 is provided with a switch whose opening and closing is controlled by a switch pressing portion, so that a signal indicating an abnormality such as a leak is generated. Can be output.

According to the display device of the fifth aspect of the present invention, in addition to the effect of the third or fourth aspect, the coil and the movable iron piece are protected and the cause of the failure can be reduced.

In the display device for electric leakage according to claim 6, in addition to the effect of any one of claims 1 to 5, it is not necessary to change the shape of the movable iron piece according to the shape of the display window, and only the display member is provided. It can be changed, and the investment amount of the mold can be reduced.

According to the display device for electric leakage and the like according to claim 7, in addition to the effect of any one of claims 1 to 6, the display of the normal state and the abnormal state is easy to see, and the display performance and the appearance performance are good. .

In the display device for electric leakage according to the eighth aspect, in addition to the effect of any one of the first to seventh aspects, in a normal state, when the display portion is visible from the display window, the movable iron piece is attached to the yoke by the permanent magnet. The magnetic flux is absorbed by the magnetic flux, and the movable iron piece is moved away from the yoke by only applying a small current to the coil in the abnormal state, and the magnetic efficiency of the electromagnet is improved.

In addition to the effect of the eighth aspect, the display device for leaking electric current according to the ninth aspect, in addition to the function and effect of the eighth aspect, causes the magnetic flux due to the current flowing through the coil to flow through the magnetic path that does not pass through the permanent magnet, so that it flows through the coil. The current can be made smaller, and the magnetic efficiency of the electromagnet can be further improved.

According to the display device for electric leakage and the like described in claim 10, in addition to the effect of claim 9, optimum magnetic characteristics can be obtained by adjusting the thickness of the spacer.

According to the eleventh aspect of the display device for electric leakage and the like, in addition to the effects of the ninth or tenth aspect, the structure of the yoke and the coil frame becomes strong.

The circuit breaker according to claim 12 is the circuit breaker according to claim 1.
It is possible to select and utilize various advantages of the display device such as the earth leakage described in FIGS.

According to a thirteenth aspect of the present invention, there is provided a circuit breaker according to the first aspect.
In addition to the action and effect of 2, the reset operation of the movable iron piece and the reset operation of the opening mechanism of the circuit breaker by the operation of the handle can be performed more reliably.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a first embodiment of the present invention.

FIG. 2 shows the normal state, (a) is a plan view,
(b) is a side view.

FIG. 3 shows the trip state, (a) is a plan view and (b) is a side view.

FIG. 4 is a schematic diagram illustrating a magnetic circuit of the electromagnet.

FIG. 5 is an exploded perspective view showing a second embodiment of the present invention.

FIG. 6 shows the normal state, (a) is a plan view,
(b) is a side view.

FIG. 7 shows the trip state, (a) is a plan view and (b) is a side view.

FIG. 8 is an exploded perspective view showing a third embodiment of the present invention.

FIG. 9 shows the normal state, (a) is a plan view,
(b) is a side view.

FIG. 10 shows the trip state, (a) is a plan view and (b) is a side view.

FIG. 11 is an exploded perspective view of essential parts showing a fourth embodiment (circuit breaker) of the present invention.

FIG. 12 shows a state immediately after the reset, (a)
Is a plan view and (b) is a side view.

FIG. 13 shows the trip state, (a) is a plan view and (b) is a side view.

FIG. 14 is an exploded perspective view of essential parts showing a fifth embodiment (circuit breaker) of the present invention.

FIG. 15 is a perspective view of the abnormal current detection block.

[Explanation of symbols]

 1 Electromagnet 2 Yoke 3 First yoke piece that constitutes a yoke 4 Second yoke piece that constitutes a yoke 5 Permanent magnet 6 Spacer 7 Coil 8 Coil frame 9 Movable iron piece 9e Movable iron piece reset part 9f Movable iron piece switch pressing part 9f 10 Display member 11 Spring 12 Frame 12a Frame base plate 12b Frame support shaft 21 Circuit breaker display window 22 Switch mounted on the circuit breaker 23 Front case of the circuit breaker 24 Handle of the circuit breaker 25 Circuit breaker Handle link 25a Handle link reset drive part 25b Handle link reset push part 29 Transmission member 30 Abnormal current detection block 31 Electromagnet of abnormal current detection block 32 Plunger of abnormal current detection block 33 Trip member of abnormal current detection block

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[Procedure amendment]

[Submission date] January 20, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0039

[Correction method] Change

[Correction content]

A display device such as an earth leakage comprising such a member is
Assemble as follows. First, the yoke 2 and the coil frame 8
, Then fix them to the base plate 12a of the frame 12, then fit the movable iron piece 9 and the spring 11 to the support shaft 12b of the frame 12, and attach one end of the spring 11 to the locking portion of the movable iron piece 9. , The other end is locked to the locking portion 12c of the frame 12, respectively. In this case, the reset portion 9e of the movable iron piece 9 projects from the frame 12 by a certain amount. Then, as shown in FIG. 2, the connecting piece 9c of the movable iron piece 9 is connected to a portion corresponding to the connecting piece of the yoke 2.
Suction to the end faces of 3b and 4b. In this case, the movable iron piece 9
Is attracted by the magnetic force of the permanent magnet 5, and therefore the spring force of the spring 11 is set to such an extent that this attraction is possible.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0047

[Correction method] Change

[Correction content]

It should be noted that this embodiment can be modified in various ways when only thinning of the circuit breaker or the like is realized. That is, the frame 12 is not essential, but the yoke 2 and the coil 7
The movable iron piece 9 may be fixed or supported by an appropriate member so as to have such a positional relationship. In addition, the display member 10
Is not essential, and an appropriate color may be applied to a predetermined position of the movable iron piece 9. Also, the structure of the coil frame 8 is not limited. Further, the electromagnet 1 may be of non-polar type, and the polar type magnetic circuit is not limited. Then, the current supplied to the coil 7 is an abnormal current , for example, zero phase.
It is also possible to directly flow the output of the current transformer . In addition, each member can be appropriately selected according to the problem to be solved.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0068

[Correction method] Change

[Correction content]

In addition to the preferable operation described in the fourth embodiment, in this state, the spring force of the transmission member 29 is applied in the direction in which the movable iron piece 9 is attracted to the yoke 2 in the normal state, and vibration or shock is generated. This prevents the movable iron piece 9 from malfunctioning .

Claims (13)

[Claims] 1. A yoke, a coil wound around the yoke, and a display unit for indicating the occurrence of the electric leakage by attracting and separating from the yoke by controlling energization of the coil according to the occurrence of the electric leakage. In a display device such as an electric leakage, which is provided with a movable iron piece provided with, and which is arranged in a circuit breaker or the like so as to change a visual state of a display portion from a display window of the circuit breaker or the like. A display device for electric leakage, in which the movable iron piece is positioned so that the display portion is displaced in parallel with the display window. 2. A yoke for the electromagnet is fixed, a movable iron piece is rotatably supported, and a substrate portion having a portion that does not overlap with the yoke and the coil is provided. The yoke and the coil of the substrate portion are overlapped with each other. 2. The display device for electric leakage or the like according to claim 1, further comprising a frame formed so that a portion not to be positioned can be superposedly positioned on the display window. 3. The display device for electric leakage according to claim 2, wherein the movable iron piece is provided with a reset portion extending from the frame with a constant length. 4. The display device according to claim 2, wherein the movable iron piece is provided with a switch pressing portion which projects from the frame with a constant length. 5. The display device for earth leakage or the like according to claim 3, wherein the frame is formed in a box shape in which a reset portion and / or a switch pressing portion of a movable iron piece are movably projected. 6. The display device according to claim 1, wherein the display portion is formed of a display member having a shape corresponding to a display window. 7. The display device according to claim 1, wherein the display portion and the yoke and coil of the substrate portion are colored differently from each other. 8. The electromagnet is of a polar type including a permanent magnet, and the movable iron piece is normally attracted to a yoke and spring-biased so as to separate from the yoke when energized to a coil. A display device for electric leakage or the like according to items 1 to 7. 9. A first yoke piece having an L-shape, wherein the yoke has a substantially U-shape including an opposing leg piece and a connecting piece, and has an opposing leg piece corresponding portion and a connecting piece corresponding portion. 9. The second yoke piece and the second yoke piece position the connecting piece corresponding portions in a superposed manner, and a permanent magnet is interposed between the connecting piece corresponding portions.
Display device for earth leakage etc. 10. The display device according to claim 9, wherein a thin spacer is interposed between the end surface of the connecting piece corresponding portion of the first yoke piece and the second yoke piece and the opposing leg piece. 11. A penetrating support, comprising a coil frame having a wide brim around which the coil is wound, and through which the opposing leg pieces corresponding to the first yoke piece and the second yoke piece penetrate. The display device for electric leakage according to claim 9 or 10, wherein a portion is formed. 12. A circuit breaker in which the display device for electric leakage or the like according to any one of claims 1 to 11 is incorporated so that the movable iron piece is reset by operating a handle. 13. The circuit breaker according to claim 12, wherein the handle and the movable iron piece are linked by a transmission member having elasticity.