JPH06243773A - Remote control type circuit breaker - Google Patents

Abstract

(57) [Abstract] [Purpose] To improve the operational reliability of remote control, and to increase the armature linear drive force without increasing the effective space for storing the electromagnet device. [Structure] A bobbin 11 around which a coil 12 is wound and which has a U-shaped brim at each end, an armature main body 16 having a rectangular plate having projections above and below, and a square crimped at the base of each projection. A pair of armature plates 17, a non-magnetic film resistor 18 attached to the armature plates 17, and a U-shaped collar on the upper side of the bobbin 11,
A support 11a for the armature tip, which is erected after the armature body 16 is inserted into the center hole of the bobbin 11, a pair of lateral U-shaped inner yokes 13, and a pair of plate-shaped members fixed to the outer surfaces thereof. The permanent magnet 14 and the lateral U provided outside it
It is composed of a pair of character-shaped outer yokes 15. Moreover, the outer yoke
Only the central portion of the 15 that is in contact with the permanent magnet 14 is formed so as to project outward from both end portions.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit breaker for remotely opening and closing a movable contact with respect to a fixed contact through a two-position rectilinear type bistable electromagnet device. The present invention relates to a remote control type circuit breaker for improving the operational reliability of the.

[0002]

2. Description of the Related Art A conventional example will be described below with reference to the drawings. FIG. 4 is a side view of the conventional electromagnet device, and FIG.
6 is a cross-sectional view of the conventional example in the off state, and FIG. 6 is a plan view of the conventional example in the off state. First, referring to FIG. 5 and FIG. 6, the schematic configuration of the conventional example will be described. Next, returning to FIG. 4, the configuration of the conventional electromagnet device relating to the main part of the embodiment according to the invention to be described later will be described.

In FIG. 5, the main constituent elements of the conventional example are:
(1) Contact part that connects and disconnects the power supply side main terminal 50 and load side main terminal 51, (2) Opening / closing mechanism part that mechanically transmits the movement of the operating handle 42 to the movable contact 52, (3) External A bistable electromagnet device 80 that rotates the movable contact 52 via the operation handle 42 based on a command, (4) Trip section that performs overcurrent operation and trips, (5) Between contacts Arc extinguishing part for the arc that occurs in. Description of (5) is omitted because it is not directly related to the invention, and (1), (2),
Regarding (4), since it is not directly related to the invention, only a brief explanation will be given, and (3) will be described in detail because it is directly related to the invention.

The contact portion (1) will be described. A fixed contact 74 having a fixed contact 73 and a movable contact 52 having a movable contact 72 are interposed between the power supply side main terminal 50 and the load side main terminal 51, and the movable contact 52 has an opening / closing mechanism described later. Rotate around the shaft 54 to connect between the main terminals 50 and 51,
Cut off. The opening / closing mechanism of (2) will be described. The opening / closing mechanism is mainly provided with an operation handle 42 rotatable around a shaft 44, a latch 56 rotatable around a latch pin 66 attached to the operation handle 42 side, a latch 56 and a shaft 58. The movable element frame 55 is rotatably connected, and the movable contact element 52 is rotatably connected to the movable element frame 55 and the shaft 54. Here, the movable contact element 52 is rotated almost integrally with the movable element frame 55, and is displaceable by the contact pressure of the movable contact, so that the movable element frame 55 is provided with a stopper and a spring that are not attached to the reference numeral. Positioned. The latch pin 66 normally fits into the recess of the latch 56 and forms a rotational connection, but is disengaged from the recess during the tripping operation by the trip portion, and the rotational connection is released. Therefore, in normal times, the operation handle 42, the latch 56, and the movable element frame 55 form a four-bar rotation chain in mechanical terms, and the rotation of the operation handle 42 is transmitted to the rotation of the movable element frame 55 in a one-to-one relationship. To be Further, during the tripping operation, even if the operation handle 42 is in the ON position, the latch 56 is disengaged from the latch pin 66 on the operation handle 42 side by the pressing operation of the bimetal 63 or the instantaneous tripping device 67 described later, and the mover frame 55 and the movable contact 52 can be in the off position. By the way, when the operation handle 42 is in the off position, that fact is displayed and can be seen from the outside, as shown in FIG. Although not shown, the ON state is also displayed.

The trip section (4) will be described. FIG. 7 is a sectional view of the conventional example in the ON state, and FIG. 8 is a sectional view of the conventional example in the trip state. The bimetal 63 shown by the alternate long and short dash line and the instantaneous trip device that is a kind of electromagnet device
67, the former operates due to a slow overcurrent state, and the latter operates due to a sudden overcurrent state. In the ON state of FIG. 7, the connection between the latch 56 and the latch pin 66 on the operation handle 42 side is released and , The movable contact 52 is urgently opened regardless of the ON position of the operation handle 2 (see FIG. 8). A manual trip lever 49 is provided near the operation handle 42.

The electromagnet device 80 of (3) will be described. Figure 5
In, the electromagnet device 80 is a bistable type,
A locating armature 86 is provided, which is connected to the operating handle 42 by a link 46. Therefore, when the electromagnet device 80 is turned on and off remotely, the armature 86
Performs a descending operation when turned on and an ascending operation when turned off, and has an on state (see FIG. 7) and an off state (see FIGS. 5 and 6).
Take a position. The descending and ascending operations are transmitted to the operation handle 42 via the link 46, and the movable contact 72 is closed and opened with respect to the fixed contact 73 as in the manual operation.

Further details of the electromagnet device 80 are shown in FIG.
Will be described with reference to. In FIG. 4, the electromagnet device 80
Is mainly composed of the following parts. A bobbin 81 around which a coil 82 is wound, an armature main body 86 having a square plate having protrusions above and below, a pair of square armature plates 87 crimped to the roots of the protrusions, and upper and lower thereof. Of the armature plate 87, non-magnetic film resistors 88 attached to the upper and lower surfaces of the armature plate 87, a pair of horizontal U-shaped inner yokes 83, and a pair of plate-shaped permanent magnets 84 fixed to the outer surfaces thereof. And a pair of lateral U-shaped outer yokes 85 provided outside thereof. The armature main body 86 is inserted into a rectangular hole in the center of the bobbin 81 with a clearance of 0.1 to 0.3 mm and is guided so as to be able to move straight in the axial direction. It has a hole for no connecting pin and is connected to the link 46, through which the operating handle
42 (see FIG. 5). The electromagnet device 80 is stored in the outer case 41 by inserting and holding it in a holding portion formed in a rectangular shape inside the case 41.

[0008]

In the conventional electromagnet device 80, the armature body 86 is inserted into the square hole at the center of the bobbin 81 with a clearance of 0.1 to 0.3 mm and is guided so as to be able to move straight in the axial direction. And is connected to the link 46 at its tip portion 86a. Therefore, the armature body 86
With the play at the center of the bobbin 81, the tip portion 86a can be slightly swung back and forth and left and right, which hinders reliable transmission of motion to the operation handle 42 (not shown) (see FIG. 5). For example, there is a risk of misalignment.

An object of the present invention is to solve the above problems of the prior art, and to allow the armature tip end portion of the electromagnet device to be connected to the manually operated handle through a link by a support portion. Remote control type circuit breaker capable of increasing the armature linear drive force without increasing the effective space related to the storage of the electromagnet device. To provide.

[0010]

A remote control type circuit breaker according to a first aspect of the present invention remotely opens and closes a movable contact with respect to a fixed contact via a two-position rectilinear type bistable electromagnet device. The circuit breaker includes a support portion that supports the tip end portion of the armature of the electromagnet device.

According to a second aspect of the circuit breaker of the first aspect, in the circuit breaker according to the first aspect, the bearing portion is formed as a part of the electromagnet device. Claim 3
A remote control type circuit breaker according to claim 1,
In the circuit breaker described in (1), the bearing is integrally formed with the holder of the electromagnet device. A remote control type circuit breaker according to a fourth aspect is the circuit breaker according to the first aspect, wherein the support portion is integrally formed with the exterior case.

A remote control type circuit breaker according to a fifth aspect is the circuit breaker according to any one of the first to fourth aspects, wherein the armature of the electromagnet device has a distal end portion thereof via an operating handle and a link. Are connected.
A remote control type circuit breaker according to claim 6,
In a circuit breaker that remotely opens and closes a movable contact with respect to a fixed contact through a two-position rectilinear bistable electromagnet device, the electromagnet device includes a plate-shaped permanent magnet and a U that sandwiches the permanent magnet with each bottom. A pair of a pair of a character-shaped inner yoke and an outer yoke is arranged so that the corresponding leg portions are opposed to each other,
At the bottom of the outer yoke, a fixed magnetic field generating means is formed so that only a central portion in contact with the permanent magnet projects outward.

[0013]

In the remote control type circuit breaker according to any one of claims 1 to 5, the armature tip end of the electromagnet device is commonly guided straight by the support portion with little play. Particularly, in the remote control type circuit breaker according to the fifth aspect, the armature tip portion of the electromagnet device is connected to the operation handle via a link.

In the remote control type circuit breaker according to a sixth aspect of the present invention, the bottom portion of the outer yoke constituting the fixed magnetic field generating means of the electromagnet device projects only the central portion in contact with the permanent magnet to the outside, and both ends thereof are Position more inside.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a remote control type circuit breaker according to the present invention will be described below with reference to the drawings. The first embodiment corresponds to claim 2, which is different from the conventional example in the configuration of the electromagnet device. FIG. 1 is an exploded perspective view of the electromagnet device of the first embodiment. The electromagnet device 10 is mainly composed of the following parts. A bobbin 11 around which a coil 12 is wound and which has a U-shaped brim at each end, an armature body 16 having a square plate having protrusions above and below, and a pair of square shaped caulks at the bases of the protrusions. Armature plate 17,
In addition, the armature main body 16 is inserted into the center hole of the bobbin 11 by the non-magnetic film-resistors 18 attached to the upper and lower surfaces of the lower armature plate 17 and the upper U-shaped collar of the bobbin 11, respectively. After being installed, a pair of lateral U-shaped inner yokes 13, a pair of plate-shaped permanent magnets 14 fixed to the outer surface of the inner yokes 13, and a pair of lateral U-shaped members provided on the outer side thereof. It consists of an outer yoke 15. Moreover, the outer yoke 15
Is shaped so that only the central portion in contact with the permanent magnet 14 projects outward from both end portions. This is to cope with the increase in the thickness of the coil 12 and the permanent magnet 14 for increasing the driving force, and corresponds to claim 6. In addition, in Figure 1,
Each pair of inner yoke 13, permanent magnet 14 and outer yoke 15
Only the front left one is shown.

The armature body 16 is inserted into a rectangular hole at the center of the bobbin 11 with a clearance of 0.1 to 0.3 mm and guided linearly in the axial direction.
Engages with the rectangular hole of the support portion 11a, and is guided so as to be able to go straight in the axial direction with little play. Further, the tip portion 16a has a connecting pin hole which is not attached to the reference numeral and is connected to the operating handle 42 through a link 46 (see FIG. 5). Inner York
The upper and lower bent portions of 13 are U-shaped above and below the bobbin 11, respectively.
It contacts the bottom surface of the U-shaped brim, and the upper and lower bent portions of the outer yoke 15 contact the upper end surfaces of the legs of the U-shaped brim.

The operation of the electromagnet device 10 is as follows. It is assumed that the upper and lower bent portions of the inner yoke 13 are magnetic poles S, and the upper and lower bent portions of the outer yoke 13 are magnetic poles N. When the coil 12 is in the demagnetized state, the upper armature plate 17 is at the upper bent portion of the inner yoke 13 as shown by the solid line,
The lower armature plates 17 are in contact with the lower bent portions of the outer yoke 15, respectively. When the coil 12 is excited, the magnetic field formed causes the upper armature plate 17 to reach N,
The lower armature plate 17 becomes S. As a result, the N of the upper armature plate 17 repels the N of the upper bent portion of the outer yoke 15 and is sucked with the S of the upper bent portion of the inner yoke 13, and by the S of the lower armature plate 17. Sucks with N of the lower bent portion of the outer yoke 15 and repels with S of the lower bent portion of the inner yoke 13,
The armature main body 16 is driven straight downward as shown by the alternate long and short dash line.

Each armature plate 17 abuts on the outer surface of the bent portion of the inner yoke 13 and the inner surface of the bent portion of the outer yoke 15, respectively, and has two positions depending on the demagnetization and excitation states of the coil 12. It is a so-called bistable form.
The armature body 16 is guaranteed to be demagnetized by the armature main body 16 and reliably activated when the coil 12 is excited by the reciprocal 18 attached to the upper and lower surfaces of the upper and lower armature plates 17, respectively.
Moreover, the armature main body 16 is guided so that the tip portion 16a thereof can be moved straight with a square hole of the support portion 11a in a state where there is little play, so that the linear movement is surely performed without lateral sway, and the link 46 can be securely moved. The movement transmitted to the operation handle 42 through the operation is ensured (see FIG. 5), and the reliability of the remote control can be improved. Moreover, since the electromagnet device 10 of the first embodiment is a basic structural unit, it is possible to adopt a free holding system according to the overall structural conditions of the circuit breaker.

The second embodiment will be described with reference to the side view of FIG. The second embodiment corresponds to claim 3. The electromagnet device 20 of the second embodiment differs from that of the first embodiment mainly in the support system of the tip portion 16a of the armature body 16. The electromagnet device 20 in FIG. 2 comprises a portion excluding only the support portion 11a in the first embodiment shown in FIG. 1 and a holder 28 formed by bending a plate into a rectangular shape for holding this portion. Moreover, one of the holders 28 is
A support portion 28a is provided in the center of the upper side of the armature 16 and is connected to the link 46 by the support portion 28a.
16a is guided so as to be able to go straight, and two have a structure in which the middle part is removed only in the left side part and the outer yoke 15 is held by the upper and lower bent parts. The support portion 28a has the same function as in the first embodiment with respect to the tip portion 16a of the armature 16. Further, the structure in which the middle portion of the left side portion of the holder 28 is removed can effectively reduce the dimension of the electromagnet device 20 in the lateral width direction, and it is possible to support downsizing of the entire device. In other words, the driving force can be increased while maintaining the effective dimension related to storage.

The third embodiment will be described with reference to the side view of FIG. The third embodiment corresponds to claim 4. The electromagnet device 30 of the third embodiment differs from that of the second embodiment in that instead of using the holder 28 of the second embodiment, a rectangular holding portion is integrally formed on the exterior case 38,
In this holding portion, the bearing portion in the first embodiment shown in FIG. 1 is used.
That is, it is configured to hold the parts except 11a. Moreover, the support portion is provided at the upper center of the holding portion of the case 38.
38a is integrally formed, and thereby guides the front end portion 16a of the armature 16 connected to the link 46 so that it can move straight with little play. Further, the middle portion is removed only from the left side portion of the holding portion of the case 38, and as in the second embodiment, the upper yoke and the lower bent portion hold the outer yoke 15, so that the same effect is obtained. With.

[0021]

In the remote control type circuit breaker according to any one of claims 1 to 5, in common, the armature tip of the electromagnet device is linearly guided by the support portion with little play. As a result, the tip of the armature is guided straight forward without rocking, and operational reliability of remote control can be improved.

Particularly, in the remote control type circuit breaker according to claim 2, 3 or 4, the support portions are respectively formed as a part of the electromagnet device and integrally formed with the holder of the electromagnet device, or integrally with the exterior case. Since it is molded, appropriate options can be taken according to the design conditions, and the structure common to each claim is simple and the cost can be reduced.

In particular, in the remote control type circuit breaker according to the fifth aspect, since the armature tip of the electromagnet device is connected to the operation handle through the link, the tip is reliably guided straight without play. The need for things is high. In the remote control type circuit breaker according to claim 6, the bottom portion of the outer yoke constituting the fixed magnetic field generating means of the electromagnet device projects only the central portion in contact with the permanent magnet outward, and the both end portions are inwardly located. Position it. Therefore, since the electromagnet device can be held by both ends of the bottom portion of the outer yoke, the size of the holding portion can be effectively reduced in the direction perpendicular to the bottom portion of the outer yoke, and the size of the entire device can be reduced. In other words, by increasing the armature linear drive force without increasing the effective space for storing the electromagnet device, it becomes possible to support the improvement in reliability of remote control.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an electromagnet device according to a first embodiment of the invention.

FIG. 2 is a side view of an electromagnet device according to a second embodiment.

FIG. 3 is a side view of an electromagnet device according to a third embodiment.

FIG. 4 is a side view of a conventional electromagnet device.

FIG. 5 is a sectional view of a conventional example in an off state.

FIG. 6 is a plan view of a conventional example in an off state.

FIG. 7 is a sectional view of a conventional example in an ON state.

FIG. 8 is a cross-sectional view of a conventional example in a trip state.

[Explanation of reference numerals] 10 electromagnet device 11 bobbin 11a support portion 12 coil 13 inner yoke 14 permanent magnet 15 outer yoke 16 armature body 16a tip portion 17 armature plate 18 reciprocal 20 electromagnet device 28 holder 28a support portion 30 electromagnet device 38 support 38a Part 46 Link

Claims (6)

[Claims] 1. A circuit breaker for remotely opening and closing a movable contact with respect to a fixed contact through a two-position rectilinear type bistable electromagnet device, and a bearing portion for supporting a tip end portion of an armature of the electromagnet device. A remote control type circuit breaker comprising: 2. The circuit breaker according to claim 1, wherein the support portion is formed as a part of the electromagnet device. 3. The circuit breaker according to claim 1, wherein the support portion is formed integrally with the holder of the electromagnet device. 4. The circuit breaker according to claim 1, wherein the support portion is integrally formed with the exterior case. 5. The circuit breaker according to any one of claims 1 to 4, wherein the armature of the electromagnet device is configured to be connected at its tip end to an operation handle via a link. Remote control type circuit breaker. 6. A circuit breaker for remotely opening and closing a movable contact with respect to a fixed contact through a two-position rectilinear bistable electromagnet device, wherein the electromagnet device includes a plate-shaped permanent magnet and a plate-shaped permanent magnet. A pair of a U-shaped inner yoke and an outer yoke sandwiched between the bottoms is arranged such that the corresponding legs are opposed to each other, and only the central portion of the outer yoke that contacts the permanent magnet is outside. A remote control type circuit breaker, comprising fixed magnetic field generating means formed so as to project toward one side.