JP2889744B2 - breaker - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shutoff mechanism for shutting off an electric circuit in response to operation of a steering wheel or an operation of an abnormal current detecting unit, and a remote opening / closing circuit for closing and cutting an electric circuit in response to a remote control signal. The present invention relates to a breaker for selectively mounting a mechanism unit.

[0002]

2. Description of the Related Art As a breaker, for example, there is a contact breaker. In this contact breaker, there is provided a shutoff mechanism that cuts off the electric circuit in conjunction with the operation of the steering wheel or the operation of the abnormal current detection unit, and a remote opening / closing mechanism that closes and cuts off the electric circuit in response to a remote control signal, The movable contact fixed to the movable contact that rotates according to the operation of the shutoff mechanism and the remote contact fixed to the remote contact that rotates according to the operation of the remote opening / closing mechanism contact and separate from each other. As a result, the electric circuit was closed and cut off.

[0003]

By the way, the breaker having only the function of the cut-off mechanism of the contact breaker and the remote control relay having only the function of the remote opening / closing mechanism are conventionally known as the contact breaker. Designed and manufactured separately. By the way, in this type of contact breaker, breaker and remote control relay, the shape and dimensions of the housing may be standardized so that they can be integrally mounted on a distribution board or the like. In such a case, it is wasteful to separately design and manufacture the contact breaker, the breaker, and the remote control relay.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and an object of the present invention is to make it possible to easily manufacture a contact breaker, a breaker and a remote control relay having housings having substantially the same shape and dimensions. Open the movable contact and fixed contact of the breaking mechanism.
The purpose is to improve the separating operation .

[0005]

According to the present invention, in order to achieve the above object, an interruption mechanism for interrupting an electric circuit in response to an operation of a steering wheel or an operation of an abnormal current detection unit, and a remote control signal A fixed contact, in which a housing for accommodating a remote opening and closing mechanism for closing and closing the electric circuit as necessary is provided in each housing, and a movable contact fixed to a movable contact of the breaking mechanism contacts and separates; The remote fixed contact that contacts and separates the remote movable contact fixed to the remote contact of the remote
A fixed contact that allows the movable contact to separate from the fixed contact
Shift them away from the pivot point of the moving contacts
The fixed contact plate which is fixed to the table back is disposed between the housing portion of each.

[0006]

The present invention has the above-described structure,
The breaking mechanism and the remote opening / closing mechanism can be selectively mounted, so that a contact breaker, a breaker and a remote control relay having a housing having substantially the same shape and the same dimensions can be easily manufactured,
Since only the shutoff mechanism and the remote opening / closing mechanism are selectively mounted, it is not necessary to individually design each contact breaker, breaker and remote control relay . Moreover, fixed contacts and remote fixed contacts
Release the movable contact from the remote fixed contact
Moving the fixed contact away from the fulcrum of the movable contact.
Because they are staggered and fixed to the front and back of the fixed contact plate,
When used as a contact breaker or breaker,
The direction of the current flowing through the movable contact and the fixed contact
In pairs, an electromagnetic repulsion is generated between the movable contact and the fixed contact.
To perform a good separation operation between the movable contact and the fixed contact.
Can be made.

[0007]

1 to 4 show an embodiment of the present invention. First, the overall configuration and operation of the contact breaker will be briefly described. The housing 10 of this contact breaker
As shown in FIG. 1A, a power supply terminal 25 for connecting a power supply line, a load terminal 9 for connecting a load line, and a remote input terminal 26 for connecting a signal line for inputting a remote control signal are formed. Are disposed at both ends of the housing 10, respectively. Note that each terminal 26 is a screw terminal.

A handle 1 protrudes from the upper surface of the housing 10. When the handle 1 is turned to a solid line state in FIG.
The movable contact 3 to which is fixed is rotated counterclockwise. When the handle 1 is rotated clockwise, the movable contact 3 is rotated clockwise. In this contact breaker, an abnormal current detection unit 2 includes an overcurrent detection unit using a bimetal 21 for detecting an overcurrent and a short-circuit current detection unit using an electromagnet device 22 for detecting a short-circuit current.

The bimetal 21 is deformed toward the breaking mechanism A when an excessive load current flows, and presses the upper part of the latch link 13 of the breaking mechanism A, so that the breaking mechanism A
Is tripped. When a short-circuit load current flows through the coil 11, the electromagnet device 22 pulls the output shaft 12 to the left in FIG. 2 and forcibly moves the movable contact 3 at the tip of the output shaft 12 in the counterclockwise direction. And the lower end of the latch link 13 of the shutoff mechanism A is pushed leftward in the figure by the base end of the output shaft 12 (not shown) to trip the shutoff mechanism A.

The breaking mechanism A is not shown in detail, but when the latch link 13 is rotated clockwise by the bimetal 21 or the electromagnet device 22 as described above, the latch link 13 is tripped by the latch piece. The latched state with the link is released, and the trip link and the connecting link 16 connecting the trip link and the movable contact 3 by the return force of the opening spring (not shown).
Is driven, and the cutoff mechanism A trips. At this time, the movable contact 3 rotates clockwise as shown by a broken line in FIG.

When the shut-off mechanism A trips as described above, the handle 1 is returned clockwise by a return spring (not shown). However, the rotation of the handle 1 by the return spring at this time is such that the handle 1 is in a neutral state (FIG. 2).
It is structured to stop when standing upright inside.
When the handle 1 in the neutral state is pivoted to fully tilt clockwise, the shut-off mechanism A is reset. Part A is set.

Next, the remote opening / closing mechanism B is provided with an electromagnet device 6 that performs bistable operation in response to a remote control signal.
And a remote contact 5 which is connected to the electromagnet device 6 via a driving plate 7 and is driven to rotate. Here, the upper end of the remote contact 5 and the hanging piece 7a of the drive plate 7
And a contact pressure spring 8 for applying a contact pressure to the remote movable contact 44 fixed to the remote contact 5. The remote contact 5 is supported by the driving plate 7 so as to be capable of seesaw movement.

Now, when a remote control signal for interrupting the electric circuit is input to the electromagnet device 6, the movable iron core 6a of the electromagnet device 6 moves upward, whereby the drive plate 7 moves counterclockwise about the shaft 7a as a fulcrum. The remote contact 5 fixed to the driving plate 7 rotates counterclockwise as shown by a broken line in FIG. Conversely, when a remote control signal for closing the electric circuit is sent, the movable iron core 6a moves downward, and the driving plate 7 rotates clockwise in the opposite direction to that described above by the contraction force of the return spring 20, The remote contact 5 also rotates clockwise.

In this contact breaker, a display device 5 for displaying the open / closed state of the electric circuit by the remote operation is provided.
0, and a display piece 5 that rotates with the rotation of the driving plate 7 from a display window 51 formed on the upper surface of the housing 10.
1a, the remote control state can be identified. Hereinafter, the structure of the contact portion, which is a feature of the contact breaker, will be described. In the contact breaker of the present embodiment, the movable contact 3 and the remote contact 5
A fixed contact plate 42 is interposed between the fixed contact 42 and the movable contact 41 fixed to the movable contact 3 is separated from and separated from the fixed contact 42, and the remote movable contact 44 fixed to the remote contact 5 is separated from the remote movable contact 44 and separated. The fixed contact 43 is fixed to the front and back of the fixed contact plate. In this embodiment, the arc traveling plate 17a of the arc extinguishing device 17 is used as the fixed contact plate to save space. Here, the arc extinguishing device 17 extinguishes an arc generated when the movable contact 41 and the fixed contact 42 are separated.

Therefore, the electric circuit inside the contact breaker is composed of the power supply terminal 25 and the coil 22 of the electromagnet device 22.
a, a bimetal 21, a conductive frame 24 incorporating the above-described members of the breaking mechanism A, a movable contact 3, a contact 4 (a movable contact 41, a fixed contact 42, an arc traveling plate 17a, a remote fixed contact 43). , Remote movable contact 4
4), formed by the path of the remote contact 5 and the load terminal 9. Incidentally, members each other not touch each other Inise' in the path is coupled with braided wire 28 or the like. A signal line for giving a remote control signal to the remote opening / closing mechanism B is connected to a remote input terminal 26.
And the coil 6b of the electromagnet device 6 are connected by a lead wire 27.

By the way, as described above, the arc traveling plate 17
When a is interposed between the movable contact 41 and the remote contact 44, the substantial insulation distance between the movable contact 41 and the remote contact 44 can be increased. When the fixed positions of the fixed contacts 42 and 43 fixed to the arc traveling plate 17a are shifted up and down, the direction of the current flowing through the movable contact 3 and the arc traveling plate 17a is reversed. Therefore, a magnetic repulsive force is generated between the movable contact 41 and the fixed contact 42, and the moving operation of the movable contact 41 and the fixed contact 42 can be performed well.

Further, in the case of this embodiment, the movable contact 3
The direction of the current flowing through the remote contact 5 and the direction of the current flowing through the remote contact 5 are also opposite, so that a magnetic repulsive force is generated to turn the remote contact 5 counterclockwise when the load is short-circuited. Simultaneously with the separation of the fixed contact 42 and the fixed contact 42, the remote fixed contact 43 and the remote movable contact 44 are also separated. For this reason, the above-described increase in the insulation distance and the movable contact 41
By increasing the magnetic drive and the cooperative operation when the remote movable contact 44 is short-circuited, it is possible to realize the high limit current blocking performance of the contact breaker.

Further, as described above, the arc traveling plate 17a
The movable contact 4 between the movable contact 3 and the remote contact 5
If the fixed contacts 42 and 43 respectively contacting with each other are provided separately, an arbitrary contact can be selected according to the required characteristics between the shut-off mechanism A and the remote opening and closing mechanism B, and the advantage of stabilizing the quality is also obtained. can get. By the way, the arc traveling plate 17a
The fixed portion of the fixed contact 42 is bent toward the remote opening / closing mechanism B side, and the contact surface of the fixed contact 42 with the movable contact 41 is substantially flush with the surface of the arc traveling plate 17a on the blocking mechanism A side. It is like that. The contact surface of the remote fixed contact 42 with the remote movable contact 44 is substantially the same as the arc traveling plate 17a.
Is flush with the surface on the remote opening / closing mechanism B side of the bent portion.

By doing so, each of the fixed contacts 42, 43
The distance between the contact surfaces facing the movable contact 41 and the remote movable contact 44 can be reduced, and the arc traveling plate 1 interposed between the movable contact 3 and the remote contact 5 can be reduced.
The exclusive space of 7a can be reduced. For this reason, the driving space of the remote contact 5 can be widened, and the remote movable contact 4
4 and the remote fixed contact 43, the insulation distance is widened, the contact life can be prolonged, and the advantage of good switching performance can be obtained.

Further, a gap is provided between the bent portion between the fixed contacts 42, 43 of the arc traveling plate 17a and the fixed contacts 42, 43. As a result, the substantial distance through which the current flows increases, and the movable contact
The magnetic repulsion generated between the fixed contact 42 and the fixed contact 42 can be increased. The above is the description of the case where the contact breaker is manufactured as shown in FIG. 1A. In the case of the contact breaker of the present embodiment, the housing 10 is used.
Has a shut-off mechanism A at one end and a remote opening / closing mechanism B at the other end, so that a breaker having only the shut-off mechanism A or a remote control relay having only the remote opening / closing mechanism B can be used. Changes can be made easily.

For example, in the case of the breaker shown in FIG. 1B, as shown in FIG. 3, the circuit may be manufactured without the remote opening / closing mechanism B. In this case, the braided wire 28 connects between the load terminal 9 and the arc traveling plate 17a. In addition, in the case of the remote control relay shown in FIG. 1C, as shown in FIG. Here, only the arc traveling plate 17a is left as a fixed contact plate, and the ground traveling plate 17a and the power supply terminal 25 are connected by a braided wire 28.

In this way, the contact breaker, the breaker and the remote control relay can be formed with housings having the same shape and dimensions. For example, when they are integrally arranged on a distribution board or the like, they can be easily mounted. This is advantageous in that it is interchangeable and can be freely replaced. The body constituting the housing 10 may be one without an opening such as the handle 1 or the display window 22, but the opening is closed by post-processing according to the type of breaker to be manufactured. You may do so.

[0023]

According to the present invention, as described above, the interruption mechanism for interrupting the electric circuit in response to the operation of the steering wheel or the operation of the abnormal current detector, and the closing and the interruption of the electric circuit in response to a remote control signal. A storage section for accommodating the remote opening / closing mechanism section as required is provided in each housing, and a fixed contact where the movable contact fixed to the movable contact section of the blocking mechanism section contacts and separates, and a remote contact section of the remote opening / closing mechanism section. The remote fixed contact, which contacts the remote movable contact fixed to the remote fixed contact, contacts the movable fixed contact with the remote fixed contact.
Move the fixed contact that separates away from the pivot point of the movable contact
Slide one another so because the fixed contact plate which is fixed to the table back is disposed between the housing portion of the respective, selectively can be mounted and a blocking mechanism portion and a remote opening and closing mechanism, substantially the same Contact breakers, breakers and remote control relays having housings of the same shape and dimensions can be easily manufactured. In addition, since the shutoff mechanism and the remote opening / closing mechanism are only selectively mounted, there is an advantage that it is not necessary to individually design each contact breaker, breaker, and remote control relay . In addition, fixed contacts and remote fixed contacts
Release the movable contact from the remote fixed contact
Moving the fixed contact away from the fulcrum of the movable contact.
Since they are staggered and fixed to the front and back of the fixed contact plate,
When used as a contact breaker or breaker,
The direction of the current flowing through the movable contact and the fixed contact
In pairs, an electromagnetic repulsion is generated between the movable contact and the fixed contact.
To perform a good separation operation between the movable contact and the fixed contact.
The effect that it can be made to play is produced.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing an external structure and a schematic internal configuration when an embodiment of the present invention is a contact breaker, a breaker, and a remote control relay.

FIG. 2 is a cross-sectional view when a contact breaker is used.

FIG. 3 is a sectional view when a breaker is used.

FIG. 4 is a cross-sectional view when a remote control relay is used.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS A Breaking mechanism B Remote opening / closing mechanism part 1 Handle 2 Abnormal current detection part 3 Movable contact 4 Contact 5 Remote contact 10 Housing 17a Arc running plate 41 Movable contact 42 Fixed contact 43 Remote fixed contact 44 Remote movable contact

Claims (1)

(57) [Claims] An interrupting mechanism for interrupting an electric circuit in response to an operation of a steering wheel or an operation of an abnormal current detector, and a remote opening and closing mechanism for closing and interrupting an electric circuit in response to a remote control signal are required. The housings are provided in the housing, respectively.The fixed contacts that contact and separate the movable contacts that are fixed to the movable contacts of the shutoff mechanism, and the remote movable contacts that are fixed to the remote contacts of the remote opening and closing mechanism are provided. and remote fixed contacts in contact separable is remote solid
Movable fixed contact that separates the movable contact from the fixed contact
A breaker characterized in that fixed contact plates fixed to the front and back are shifted from each other so as to be away from the rotation fulcrum of the contact, and are arranged between the respective storage portions.