JPH0240829A - Circuit breaker - Google Patents

Abstract

PURPOSE:To make it possible to discriminate the ON condition and the OFF condition of a circuit breaker precisely by installing the third permanent magnet to a handle, converting between the ON position and the OFF position of the handle to turn over the first permanent magnet with the second and the third permanent magnets, and displaying the ON and the OFF conditions of the circuit breaker through a window. CONSTITUTION:Since the magnetomotive force of the third permanent magnet 7 is larger than that of the second permanent magnet 6 at the handle position where the third permanent magnet 7 is close to the pole of the second permanent magnet 6 which is close to the third permanent magnet 7, the third permanent magnet 7 overpowers the second permanent magnet 6, absorbs one pole of the first permanent magnet 4, and displays one side either the ON or the OFF condition. When the third permanent magnet 7 is apart from one pole 601 of the second permanent magnet 6, the magnetomotive force of the third permanent magnet 7 cannot overpower that of the second permanent magnet 6 at the handle position, the first permanent magnet 4 is turned over by the function of the second permanent magnet 6, and the other side display of the ON and the OFF conditions is presented. As a result, since the display is presented by the first permanent magnet 4 positively, a precise discrimination can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a circuit breaker, and particularly to improvements in its on/off indication.

[Conventional technology]

Fig. 7 is a partial cross-sectional side view of a conventional circuit breaker, Fig. 8 is a plan view of the circuit breaker of Fig. 7, and (1) is a breaker case with a built-in circuit breaker mechanism (not shown). There is a base (Lot) and a cover (1
02) is a handle that is interlocked with the circuit breaker mechanism and can be switched between the on position and the OFF position by the operation of the circuit breaker mechanism or by manual operation, and this handle (2) is connected to the cover (102). A handle (201) protrudes outward from a window (104) formed in the top wall (103) of the
) and a handle frame (203) that is fitted onto and supports the main body (202). It is pivotably supported so that it can be switched between. On the top wall (103) of the cover (102), there is an ON button that displays the on and off positions of the handle (2).
The word OFF is displayed, and depending on the direction in which the handle (2) is tilted, the operator can determine whether the circuit breaker is in the ON or OFF state by looking at the ON or OFF display.

Generally, a circuit breaker mechanism includes a switching contact that opens and closes a circuit, a switching mechanism that opens and closes this switching contact, and an overcurrent detection device that detects the overcurrent when an overcurrent flows in the circuit and operates the switching mechanism. It consists of a handle (2),
is linked to the opening/closing mechanism. When an overcurrent flows through the circuit, the switching mechanism is operated by the overcurrent detection device, the switching contacts open and close, the current is cut off, and the circuit breaker is turned off. The handle (2) is then switched from the on position to the off position by the operation of this opening/closing mechanism. When it is desired to close the circuit, that is, to turn it on, the handle (201) is manually operated to return the handle (2) to the on position, and the handle (2) operates the opening/closing mechanism to close the opening/closing contact. In addition, the opening/closing contact is handled by the handle (
2) can be opened and closed by manually switching it to the OFF position, or by providing an electromagnetic device for operating the opening/closing mechanism and reversing the direction of energization to the coil by remote control. In that case as well, the position of the handle (2) can be changed by the opening/closing mechanism. In any case, the handle (2) occupies a position corresponding to the on state and off state of the circuit breaker.

[Problem to be solved by the invention]

The conventional circuit breaker is constructed as described above, and depending on the direction in which the handle (2) falls, the O applied to the breaker case is
N. It is possible to determine whether the circuit breaker is on or off by looking at the OFF display, but it is difficult to see the direction in which the handle (2) is tilted from a distance, so the circuit breaker There was a problem in that it was not possible to clearly determine whether the circuit breaker was on or off.

This invention was made in order to solve the problems of the conventional circuit breaker, and its purpose is to provide a circuit breaker that can clearly distinguish between the on state and the off state even from a distance. .

[Means for Solving the Problems] In order to achieve the above-mentioned object, the circuit breaker according to the present invention includes a plate-shaped first permanent magnet in an on/off display window formed in the breaker case. The handle is supported by a holder made of non-magnetic material so as to be reversible about an axis substantially parallel to the switching direction of the handle, and both magnetic poles of the U-shaped second permanent magnet are opposed to both magnetic poles of the first permanent magnet. Further, the holder is provided with a magnetic pole having a larger magnetomotive force than the second permanent magnet and whose polarity is opposite to the magnetic pole of the second permanent magnet on the handle side when the handle is in the on position or the off position. The first permanent magnet is equipped with three permanent magnets, and when the handle is in the on position, an on indication is given on the plate surface of the first permanent magnet on the side that can be seen through the window, and an off indication is made on the other side plate surface. It is.

[Function] In the circuit breaker configured as described above, at the handle position where the third permanent magnet is close to the magnetic pole of the second permanent magnet, the third permanent magnet is closer to the magnetic pole of the second permanent magnet. Since the magnetomotive force is larger than that of the second permanent magnet, the third permanent magnet overcomes the magnetomotive force of the second permanent magnet and attracts one of the magnetic poles of the first permanent magnet, causing one of the on and off indications. In the handle position where the third permanent magnet is away from the above-mentioned one magnetic pole of the second permanent magnet, the third permanent magnet cannot overcome the magnetomotive force of the second permanent magnet, and the third permanent magnet The first permanent magnet is reversed by the action of the second permanent magnet to display the other on/off status (Embodiment) An embodiment of the present invention will be described below with reference to FIGS. 1 to 6. FIG. 1 is a partially sectional side view of the main parts of a circuit breaker according to an embodiment of the present invention, FIG. 2 is a sectional view taken along line II-II in FIG. 1, and FIG. FIG. 4 is a plan view of the entire circuit breaker, and FIG. 4 is a perspective view of the holder that holds the first permanent magnet in this embodiment.
The figure is a sectional view taken along the line ■-■ in FIG. 4, and FIG. 6 is a schematic plan view of the main parts for explaining the operation of this embodiment. The same reference numerals are used to omit the explanation.

In the figure, (4) is a plate-shaped first permanent magnet that integrally has a pair of protrusions (402) on one axis (401) passing through its center, and parts (402) on both sides of this axis (401). 403
) and (404) constitute magnetic poles of different polarities as shown by N and S in FIG. (5) is made of a suitable non-magnetic material such as a plastic material, and the first permanent magnet (4
) is a holder that supports a cylindrical part (501) and a bottom wall (502) so as to be reversible about the axis (401).
The bottom of the cylindrical part (501) has a flange (5).
03) is formed. A hole (504) is formed at the top of the cylindrical part (501) to rotatably accommodate the protrusion (402) of the first permanent magnet (4), and thus the first permanent magnet (4) It is supported by a holder (5) such that it can be turned over about the axis (401). Moreover, ON is displayed in letters on one plate surface of the first permanent magnet (4), and leaf F is displayed on the other plate surface (the front plate surface in FIG. 4).

(105) is adjacent to the side of the handle (2) at a position approximately halfway between the on position (solid line position in Figure 1) and the off position (position indicated by the phantom line in Figure 1) of the handle (2). A window (105) is formed in the top wall (103) of the cover (102), and as shown in FIG. 2, a sleeve (106) for attaching the holder (5) is integrated therein. is formed. The holder (5) has a flange (50
3) is inserted into the sleeve (106) until it abuts the lower end of the sleeve (106), and is positioned in the vertical direction. The holder (5) is also oriented such that the axis (401) of the first permanent magnet (4) is parallel to the switching direction of the handle (2). And holder (5)
is fixed to the sleeve (106), for example, by gluing. In this way, attach the holder (5) to the sleeve (10
6), the plate surface of the first permanent magnet (4) is fixed to the window (
105).

(6) is a U-shaped second permanent magnet supported by the holder (5) with its magnetic poles (601) and (602) facing both magnetic poles of the first permanent magnet (4), respectively. In the illustrated embodiment, the second permanent magnet (6
) is insert molded into the holder (5).

(7) is a pair of third permanent magnets, and the handle (2) is a pair of third permanent magnets.
), the main body (202 of the handle (2) ) (side surface on the holder (5) side) by adhesive or other appropriate means. Furthermore, the magnetomotive force of the third permanent magnet (7) is stronger than the magnetomotive force of the second permanent magnet (6). is close to the magnetic pole of the second permanent magnet (6) (soB, and the first permanent magnet (4) is close to the second permanent magnet (4)
Since the ON display is made in the direction shown in the figure, that is, in a state where the N pole is close to the handle (2), the third permanent magnet (7) has an S pole that is close to the second permanent magnet (6). It is attached to the main body (202) so as to overcome the magnetomotive force of the second permanent magnet (6) and attract the N pole of the first permanent magnet (4), in close proximity to the magnetic pole (601) on the handle side of the magnet. has been done.

Next, the operation will be explained. Now the handle (2) is the first
It is assumed that the switch is in the on position shown by the solid line in the figure and FIG. At this time, the third permanent magnet (
The S pole of the third permanent magnet (7) is close to the magnetic pole (601) on the handle (2) side of the second permanent magnet (6), and the S pole of the third permanent magnet (7) is close to the magnetic pole (601) of the second permanent magnet (6) on the handle (2) side. 6,), and attracts the N pole of the first permanent magnet (4), so that the plate surface labeled ON of the first permanent magnet (4) is facing upward, and the third As shown in the figure, the fact that the circuit breaker is on is displayed through a window (105). Then, when the handle (2) is switched to the off position shown in phantom in FIGS. 1 and 6, the third permanent magnet (7) is turned into the second permanent The magnetic pole (60) of the magnet (6)
1), the first permanent magnet (4) becomes unable to overcome the magnetomotive force of the second permanent magnet (6), and due to the action of the second permanent magnet (6), the first permanent magnet (4) moves away from its axis (401). The front and back sides of the circuit breaker are turned around, and as shown by the imaginary line in FIG. 6, the board side labeled ``F'' faces upward, indicating that the circuit breaker is in the OFF state. In this state, when the handle (2) is returned to the ON position, the first permanent magnet (4) is turned over again, and the plate side labeled "ON" faces upward, indicating that the circuit breaker is in the ON state. do.

Therefore, the on and off states of the circuit breaker are
Unlike conventional systems, the determination is not made based on the direction in which the handle (2) is tilted, but is actively displayed using the first permanent magnet (4), so that clear determination can be made.

In the above embodiment, the letters ON and OFF were displayed on the plate surface of the first permanent magnet (4), but other suitable means, such as different colors (for example, red for on and red for off), may be used. It is also possible to display on/off status using blue), or using a combination of text and coloring.

Furthermore, the on/off display according to the present invention can be used in combination with conventional display methods. Furthermore, in the above embodiment, the third permanent magnet (7) is attached to the main body (202) of the handle (2), but it may also be attached to the handle frame (203). (5), and therefore the height position of the first permanent magnet (4) may also be changed depending on the mounting position of the third permanent magnet (7). Furthermore, also
Holder (5) has cover (102) (7) top wall (1o3
), but without forming the sleeve (106),
The holder (5) itself may be fixed directly to the top wall (103) by an appropriate means such as adhesion or screwing, or the holder (5) itself may be attached to the cover (
102). Further, in the illustrated embodiment, the holder (5) has a bottom wall (502), which prevents dust from entering the breaker case (1) through the window (105). The wall (502) is not necessarily required. Furthermore, the third permanent magnet (7) can be attached to any position in the switching direction of the handle (2), and the position of the window (l○5) depends on the position of the third permanent magnet (7). All you have to do is change it.

In addition, the third permanent magnet (7) is connected to the magnetic pole (
601). In that case, the ON display and OFF display in the illustrated embodiment may be reversed. Further, the protrusion (402) is connected to the first permanent magnet (4).
It is not necessary that the projection (402) be integral with the first permanent magnet (4), and the projection (402) may be fixed to the first permanent magnet (4). Furthermore, the shape of the first permanent magnet (4) does not have to be circular, but can be any other suitable shape such as a square.

[Effects of the Invention] As described above, according to the present invention, a window is formed in the breaker case, a first permanent magnet is supported in a reversible manner with respect to the window, and a U-shaped second With both magnetic poles of the permanent magnet facing both magnetic poles of the first permanent magnet and a third permanent magnet attached to the handle, the second and second permanent magnets are connected by switching the handle between the OFF position and the OFF position. The first permanent magnet is turned over by the third permanent magnet to actively display the on and off states of the circuit breaker through the window, making it clear whether the circuit breaker is on or off. A discernible effect is obtained.

[Brief explanation of the drawing]

FIG. 1 is a partial cross-sectional side view of the main parts of a circuit breaker according to an embodiment of the present invention, and FIG. 2 is a line rr-rr in FIG.
3 is a plan view of the entire circuit breaker according to the embodiment, FIG. 4 is a perspective view of the holder for holding the first permanent magnet in the embodiment, and FIG. FIG. 6 is a schematic plan view of the main parts for explaining the operation of the embodiment, FIG. 7 is a partially sectional side view of a conventional circuit breaker, and FIG. FIG. 8 is a plan view of the circuit breaker of FIG. 7. In the figure, (1) the breaker case, (105) the window, (2) the handle, (4) the first permanent magnet, (40
1) is its axis, (403) and (404) are its axes (40
1), (5) is the holder, (6) is the second permanent magnet, (601) is the magnetic pole on the holder (5) side,
(7) is the third permanent magnet. Note that the same reference numerals in each figure indicate the same or corresponding parts. Agent Patent Attorney Masuo Dai Nyuu No. 2: Mizuhisa Shimazo, 5 Figures Figures Figures

Claims (1)

[Claims] (1) A breaker case with a built-in circuit breaker mechanism, interlocked with the circuit breaker mechanism, and with this circuit breaker mechanism,
Further, in a circuit breaker equipped with a handle that can be switched between an on position and an off position by manual operation, a window formed in the breaker case adjacent to the handle, and a holder made of a non-magnetic material can be used to see through the window. a plate-shaped first permanent plate, which is supported so as to be reversible from front to back about an axis that is substantially parallel to the switching direction of the handle with respect to the window, and has magnetic poles of different polarities on both sides of the axis; a magnet, a U supported by the holder with both magnetic poles facing both magnetic poles of the first permanent magnet;
a second permanent magnet in the shape of a letter, and a magnetic pole having a larger magnetomotive force than the second permanent magnet and having a polarity opposite to this magnetic pole on the handle-side magnetic pole of the second permanent magnet when the handle is in the on position or the off position. a third permanent magnet attached to the handle so that the handle is in close proximity to the handle; an on display is provided on the plate surface of the first permanent magnet on the side that can be seen through the window when the handle is in the on position; A circuit breaker with an OFF indication on the side board.