JPH0240830A - 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 a pair of second permanent magnets to a handle, and turning over the first permanent magnet with the second permanent magnets by converting the handle, and displaying the ON condition and the OFF condition of the circuit breaker through a window. CONSTITUTION:When a handle 2 is at the ON position, the second permanent magnet 6A is close to the first permanent magnet 4, and the S pole of the second permanent magnet 6A absorbs the N pole of the first permanent magnet 4. As a result, the plate surface presenting ON of the first permanent magnet 4 faces upward, and displays that a circuit breaker is in the ON condition. On the other band, when the handle 2 is converted to the OFF position, the second permanent magnet 6B approaches the first permanent magnet 4, the N pole of the second permanent magnet 6B repels the N pole of the first permanent magnet 4, and absorbs the S pole. As a result, the first permanent magnet 4 is turned over, the plate surface presenting OFF faces upward, and displays that the circuit breaker is in the OFF condition.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application 1] This invention relates to a circuit breaker, and particularly to improvements in its on/off indication.

[Prior Art] Fig. 7 is a partial cross-sectional side view of a conventional circuit breaker, and Fig. 8 is a plan view of the circuit breaker shown in Fig. 7. (1) is a circuit breaker with a built-in circuit breaker (not shown). This breaker case includes a base (101) and a cover (101) mounted on the base (101).
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 breaking mechanism consists of a switching contact that opens and closes a circuit, a switching mechanism that opens and closes this switching contact, and an overcurrent that detects this overcurrent when it flows through the circuit and operates the switching mechanism. Consisting of a detection device, 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.

[Problems to be Solved by the Invention] The conventional circuit breaker is constructed as described above, and the O applied to the breaker case depends on the direction in which the handle (2) falls.
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 object, the circuit breaker according to the present invention has a plate-shaped first permanent magnet placed at an approximately intermediate position between the on position and the off position of the handle. A holder made of non-magnetic material supports the on/off display window formed in the breaker case adjacent to the handle so that it can be rotated around an axis approximately parallel to the switching direction of the handle. A pair of second permanent magnets are mounted so that magnetic poles of different polarity in the on position and the off position are close to the first permanent magnet, and a pair of second permanent magnets are mounted on a side that can be seen through the window when the handle is in the on position. , an ON indication is given on the plate surface of the first permanent magnet, and an OFF indication is given on the other plate surface.

[Operation] In the circuit breaker configured as described above, when the handle is switched from the on position to the off position or vice versa, the first permanent magnet is reversed by the second permanent magnet, and the handle is turned on and off. The on/off status of the circuit breaker is displayed through the off display window.

[Embodiment 1] 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 V-■ in Figure 4, and Figure 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 the parts on both sides of this axis (4o1) ( 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). Further, ON is displayed in letters on one plate surface of the first permanent magnet (4), and OFF is displayed on the other plate surface (the back 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 the holder (5
) is fixed to the sleeve (106), for example, by gluing.

In this way, when the holder (5) is fixed to the sleeve (106), the plate surface of the first permanent magnet (4) is fixed to the window (105).
It is something that can be seen through.

(6A) and (6B) are a pair of second permanent magnets,
The body ( 2
02) (side surface on the holder (5) side) by an appropriate means such as adhesive. In the illustrated embodiment, the ON display is made when the first permanent magnet (4) is oriented as shown in FIG. 2, that is, when the N pole is close to the handle (2), so that The permanent magnet (6A) is
A permanent magnet (6B) is attached to the main body (202) so that its S pole faces the first permanent magnet (4) and attracts the N pole of the first permanent magnet (4), and corresponds to the OFF position. is such that its north pole faces the first permanent magnet (4) when the handle (2) is switched to the off position, and the south pole of the first permanent magnet (4)
It is attached to the main body (202) so as to attract the poles.

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 second permanent magnet (
6A) is close to the first permanent magnet (4), and the south pole of this second permanent magnet (6A) attracts the north pole of the first permanent magnet (4), thus The surface of the board labeled ON of the magnet (4) is facing upwards, and as shown in FIG. 3, it is displayed through the window (105) that the circuit breaker is in the ON state. Next, when the handle (2) is switched to the off position shown in phantom in FIGS. The N pole of the second permanent magnet (6B) repels the N pole of the first permanent magnet (4) and attracts the S pole. The magnet (4) is turned upside down around its axis (401), and the plate surface labeled OFF faces upward, as shown by the imaginary line in Figure 6, 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 by 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 embodiment, the second permanent magnet (6A); (6B) is attached to the main body (202) of the handle (2), but the second permanent magnet (6A); (6B) is attached to the main body (202) of the handle (2).
), and in that case, the height position of the holder (5), and therefore the height position of the first permanent magnet (4), may also be the same as that of the second permanent magnets (6A), (6B). It may be changed depending on the mounting position. Furthermore, although the holder (5) is fixed within a sleeve (106) integrally formed on the top wall (103) of the cover (102), the sleeve (10
6), the holder (5) may be directly fixed to the top wall (103) by an appropriate means such as adhesion or screwing, or the holder (5) itself may be formed integrally with the cover (102). good. 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 holder (5) may have a shape other than the one shown in the figure, for example, a pair of holders on the inner surface of the top wall (103) of the cover (102) corresponding to the protrusions (402) of the first permanent magnet (4). A support protrusion may be provided, and this protrusion may be formed with a hole for accommodating the protrusion (402) of 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.

[Effect of the Invention J As described above, according to the present invention, a window is formed in the breaker case, a first permanent magnet is supported with respect to the window so as to be reversible, and a pair of second permanent magnets are attached to the handle. A permanent magnet is attached, and when the handle is switched between the on position and the off position, the first permanent magnet is reversed by the second permanent magnet, and the circuit breaker is turned on and off through the window. Since this is actively displayed, it is possible to clearly distinguish between the on state and the off state of the circuit breaker.

[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 II--II in FIG. 1.
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 above 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
Parts on both sides of 1), (5) are holders (6A), (6
B) is the second permanent magnet. Note that the same reference numerals in each figure indicate the same or corresponding parts. Agent Patent Attorney Masuo Oiwa 7.L? ! !
T calendar history 6:! ↓ Figure Figure Figure Figure

Claims (1)

[Claims] (1) A breaker case with a built-in circuit breaker mechanism, which is linked to the circuit breaker mechanism, and with this circuit breaker mechanism,
or a circuit breaker having a handle that is manually switched between an on position and an off position, wherein the breaker is located adjacent to the handle at a position substantially intermediate between the on position and the off position of the handle; a window formed in the case; supported by a holder made of a non-magnetic material so as to be able to see through the window and to be reversible about an axis substantially parallel to the switching direction of the handle with respect to the window; a plate-shaped first permanent magnet having magnetic poles of different polarities on both sides of the handle; and a plate-shaped first permanent magnet having magnetic poles of different polarities on both sides of the handle; a pair of second permanent magnets attached to the handle at intervals in the switching direction, the second permanent magnets being attached to 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 a display and an OFF display on the other side of the board.