JP2838949B2 - Circuit 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 circuit breaker provided with auxiliary devices such as an alarm switch and an auxiliary switch.

[0002]

2. Description of the Related Art A conventional circuit breaker will be described with reference to FIGS. 7 is an external perspective view, FIG. 8 is an exploded perspective view of FIG. 7, FIG. 9 is a view showing an ON state in a section taken along line IX-IX in FIG. 7, and FIG. 10 is an OFF state in the same section as FIG. Figure showing
FIG. 11 is a view showing a trip state in the same cross section as FIG.
2 is a sectional view taken along the line XII-XII in FIG. 8, and FIG. 13 is a view of FIG. 12 viewed from below.

In the drawing, reference numeral 1 denotes a circuit breaker case comprising a base 1a and a main cover 1b detachably fixed to the base 1a, 2 denotes an auxiliary device such as an alarm switch and an auxiliary switch, and 3 denotes a base of the main cover 1b. A recess formed on the surface 101 opposite to 1a for accommodating the accessory 2 is attached to the main cover 1b in a detachable manner, and an auxiliary cover for closing the recess 3 is provided in the circuit breaker case 1. A movable element that performs opening and closing operations, and has a movable contact 5a. 6 is a movable contact 5a
And a stationary handle 7 that opens and closes the movable element 5 via a toggle link mechanism 8, and a rotating section 7a that rotates along the inner surface of the main cover 1b.
And a handle portion 7b protruding from the rotating portion 7a and protruding outside from the opening of the main cover 1b. Reference numeral 9 denotes a lever connected to the toggle link mechanism 8, and reference numeral 10 denotes a trip bar, which is connected to the lever 9 via a lip 11 and a latch 12. Reference numeral 13 denotes a tripping mechanism (bimetal type, electromagnetic type) connected to the load side terminal plate 14, and the flexible twisted wire 1
5 is connected to the mover 5.

Next, the operation will be described. When the handle 7 is moved in the direction of arrow 16 from the on state shown in FIGS. 7 to 9, the mover 5 is pulled up by the bending of the toggle link mechanism 8, and is turned off as shown in FIG. 10. FIG.
When the handle 7 is moved in the direction of the arrow 17 from the OFF state of 0, the mover 5 is pushed down by the extension of the toggle link mechanism 8, and the ON state shown in FIG. When an overcurrent flows in the ON state of FIG. 9, the tripping mechanism 13 is operated to rotate the trip bar 10 in the direction of arrow 18, and the lever 9 is lifted by the release of the lip 11 and the latch 12, thereby causing the toggle link mechanism to move. The armature 8 is bent and the mover 5 is lifted up, and a trip state occurs as shown in FIG.

[0005]

In the conventional circuit breaker, when the auxiliary cover 4 is opened as shown in FIG. 8 and the attachment device 2 is attached to the recess 3, the circuit breaker is turned on as shown in FIG. In this case, there is a problem in that the mounting operation of the attachment device 2 involves danger because it is in a live state and an unnecessary trip operation occurs.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem. When the auxiliary cover is opened, the circuit breaker is tripped.
An object of the by mechanism and obtain a highly reliable circuit breaker enhance the safety of the accessory mounting operation by tripping independently.

[0007]

The circuit breaker according to the present invention is provided between the auxiliary cover and the trip bar.
Rotate the trip bar independently of the trip mechanism
An auxiliary cover linking device, and the auxiliary cover linking device
Is operated by the trip mechanism when the auxiliary cover is closed.
While the auxiliary cover is
When opened, the trip bar is independent of the trip mechanism.
Is rotated .

[0008]

According to the present invention, when the auxiliary cover is opened, the trip is performed.
Rotate the trip bar independently of the mechanism to cut off the circuit
Since the container is tripped, attachment work of the attached device can be performed safely.

[0009]

[Embodiment 1] One embodiment of the present invention will be described with reference to FIGS. 1 is an external perspective view, FIG. 2 is a view showing an opened state of an auxiliary cover, and FIG. 3 is a cross-sectional view taken along a line III-III in FIG. 1. In FIG. The description is omitted here. In the figure, reference numeral 19 denotes a rod engaged with the trip bar 10 and protrudes from the surface 101 of the main cover 1b. Reference numeral 20 denotes a spring for projecting the rod 19. this
Et al. Operate the trip bar independently of the normal trip mechanism.
An auxiliary cover connecting device to be rotated is formed.

When the auxiliary cover 4 is closed as shown in FIG. 1, the rod 19 is pushed in against the spring 20. Then, as shown in FIG. 2, when the auxiliary cover 4 is opened, the rod 19 protrudes by the spring 20 to rotate the trip bar 10 in the direction of the arrow 18, so that the trip is performed.

Embodiment 2 FIG. In the embodiment shown in FIG. 4, the trip button 21 is manually operated.
The trip button 21 is stopped at the inner surface of the auxiliary cover 4 as a projectable structure. FIG.
In the state shown in FIG. 5, if the trip button 21 is pressed through the hole 22 of the auxiliary cover 4, the
Is opened, the trip button 21 is projected by the spring 23 and the trip bar 10 is turned in the direction of the arrow 18 to trip.

Embodiment 3 FIG. 5, in the embodiment shown in FIG. 6, Oh Ru those provided trip bar lift-up projection 24 in the auxiliary cover 4. This protrusion
24 is the trip bar independently of the normal trip mechanism.
To form an auxiliary cover linking device for rotating. When the auxiliary cover 4 is opened, the projection 24 flips up the trip bar 10 and rotates in the direction of the arrow 18, so that the trip is performed.

[0013]

As described above, according to the present invention, when the auxiliary cover is opened, the auxiliary cover linking device is connected to the normal tripping mechanism.
In this case, the trip bar is independently rotated to trip the circuit breaker, so that the safety of the attachment device mounting work is enhanced and a highly reliable one can be obtained.

[Brief description of the drawings]

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

FIG. 2 is a view showing a state where an auxiliary cover is opened.

FIG. 3 is a sectional view taken along line III-III in FIG. 1;

FIG. 4 is a sectional view showing a second embodiment of the present invention.

FIG. 5 is a sectional view showing a third embodiment of the present invention.

FIG. 6 is a rear view showing the auxiliary cover of FIG. 5;

FIG. 7 is an external perspective view showing a conventional device.

FIG. 8 is an exploded perspective view of FIG. 7;

9 is a diagram showing an ON state in a cross section taken along line IX-IX in FIG. 7;

FIG. 10 is a diagram showing an off state in the same cross section as FIG. 9;

FIG. 11 is a diagram showing a trip state in the same cross section as FIG. 9;

FIG. 12 is a sectional view taken along line XII-XII in FIG. 8;

FIG. 13 is a view of FIG. 12 as viewed from below.

[Description of Signs] 1 Circuit breaker case 1a Base 1b Main cover 101 Surface of main cover opposite to base 2 Attached device 3 Recess 4 Auxiliary cover 5 Mover 6 Stator 7 Handle 10 Trip bar 19 Rod 20 Spring 21 Trip button 23 Spring 24 Projection

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Shinji Yamagata 1-8 Midoricho, Fukuyama City Mitsubishi Electric Corporation Fukuyama Works (72) Inventor Shiro 1-8 Midorimachi Fukuyama City Mitsubishi Electric Fukuyama Works ( 72) Inventor Nobusaku Yamabuchi 1-8 Midoricho, Fukuyama City Mitsubishi Electric Corporation Fukuyama Works (72) Inventor Tsukasa Iio 1-8 Midorimachi Fukuyama City Mitsubishi Electric Corporation Fukuyama Works (72) Inventor Yoshiaki Kobayashi Fukuyama No. 1-8, Midoricho, Mitsubishi Electric Corporation Fukuyama Works (72) Inventor Setsuo Hosugai No. 1-8 Midorimachi, Fukuyama City, Fukuyama Works, Mitsubishi Electric Corporation (58) Field surveyed (Int. Cl. ⁶ , DB name) H01H 69/01-83/22

Claims (1)

(57) [Claims] 1. A circuit breaker case comprising a base and a main cover fixed to the base and having a built-in breaking mechanism.
A circuit breaker having a recess formed on the surface of the main cover opposite to the base and for accommodating an accessory of the blocking mechanism, and an auxiliary cover attached to the main cover to close the recess; Wherein the shut-off mechanism is a stator having a fixed contact, a mover having a movable contact, a toggle link mechanism connected to the mover, a tilting handle for operating the toggle link mechanism, and the other end of the toggle link mechanism. lever for supporting the trip bar to trip the toggle link mechanism the lever is rotated, and the tripping the circuit breaker comprising a mechanism overcurrent rotates the trip bar flows, the said auxiliary cover trip between bars, the tripping independently an auxiliary cover interlocking unit which rotates the trip bar to the mechanism, the auxiliary cover interlocking device before
When the auxiliary cover is closed, the trip mechanism
When the auxiliary cover is opened and the
Rotating the trip bar independently of the can the tripping mechanism
A circuit breaker characterized in that the circuit breaker is adapted to be operated.