JPS60241621A - Circuit breaker - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a circuit breaker, and particularly to an improvement in its opening/closing mechanism.

[Prior art]

Conventionally, this type of circuit breaker has been constructed as shown in FIGS. 1 to 4. Is the OF in Figure 1? Figure 2 shows the ON state 1, and Figure 8 shows the state 1 at the moment of tripping.
1 FIG. 1 is a side sectional view showing the state WA when the contacts are welded due to overcurrent. In the figure, 11) is a base made of an insulating material, (2) is a handle rotatably supported at the entire center of a shaft (101) made up of one group of this pace (1), and (31 is a shaft ( 101) with the tension spring attached to the other l1Il to the above pace ill
is applied to the handle (2) to urge the handle (2) counterclockwise. (4) It is formed in an iU shape, and one leg is the inner end (201) of the handle (2).
) is rotatably inserted into a hole (not shown) drilled in +51t'i; The 1st and 8th launch surfaces (5a) are opposite to each other at one rotating end.
(51))i-[is doing. (7) is rotatably supported on the mover (6) by the shaft (6), and the retaining portion (7) is rotatably supported by the shaft (6).
a), which is always biased in a direction opposite to the biasing direction of the movable element (5) by a torsion spring (8) wound around the shaft (6). 9) is the above σ
It is a roller loosely fitted to the other leg of the pin (4) so that it can rotate, and is normally held between the latch surface (5a) (s b ) and the lock 5 (7a).

(11) is the axis accommodated in the above oJ exciter (6), 04
is a movable contact fixed to one end of the six actuators (6),
Opposite is the axis housed in the above pace +11, 041 is the tension 9 spring stretched between this ao book and the above l11111),
(c) is a stator fixed at the above pace +11, Q@ is a fixed contact fixed to the stator o so as to face the above possible IIJm point O, and Oη is a fixed contact whose one end is fixed to the above stator t.
The coil is electrically connected to li9, and the other end is electrically connected to terminal H. (not shown).

A yoke W is attached to the pace Ill and forms a magnetic path, and a yoke (to) is attracted to the left in the figure against the spring force of the push spring when the coil 0η is excited.

The plunger (to) is a bobbin around which the coil 9η is wound, and the plunger is loosely fitted into the hollow part of the bobbin. (to) is a rond that is driven to the left when the plunger (to) is sucked, 4 is a flexible copper stranded wire whose one end is electrically connected to the movable element (6), and ■ is The other end of this flexible copper stranded wire is electrically connected to a bimetal, and 6 is a terminal that is electrically connected to this bimetal by VC. It is something that connects. The item is the 11 set screw screwed into the 4 pieces above.
(2) is an insulating tube attached to the bimetal tap, (7) is an arc runner whose one end is fixed to the terminal ■, and whose other end is fitted into the groove of the pace ill;
(to) is a sub-plate made of inorganic material arranged on both sides of the arc runner so as to be parallel to the traveling direction of the arc; In the chamber, a plurality of grid curves are supported by a pair of side plates at predetermined intervals.

Next, the operation of a conventional circuit breaker will be congratulated.

That is, in any case where the circuit breaker is in the OFF state shown in FIG.
(5a) (5b) G lock V bar 171 Q lock # (
7a), and the σ pin (4) is locked.

When the handle (2) is turned clockwise (ON operation) from the 0FIF state of the circuit breaker shown in Figure 1, the handle (2)
The toggle link mechanism formed by the inner end (gol) and jumper (4) extends beyond the dead point, and the mover 1
61#' The i-axis (6) rotates counterclockwise around the entire center, and the movable contact te'4 contacts the fixed contact 011, turning into the ON state shown in FIG. Next, turn the handle (2) to the left (OFF
operation), the toggle link mechanism formed by the handle (inner end (1101) of the handle (21) and the jumper pin (4+) bends beyond the dead point, and the qm element (5) rotates clockwise around the shaft 16) Fν. The fixed contact is opened from the end and the first
The OFF state shown in the figure is reached.Next, when a relatively small excessive current such as an overload current flows, the bimetal is bent by its own Joule heat generation, and the tip of the bimetal is turned off by the locking lever. 7), and the locking lever (7) is -(6
) in a clockwise direction to release the roller (9).

Therefore, when the rest of σ Bi/(4J is released and the biasing force of the tension spring o41 causes the Shimachi Moko (6) to rotate clockwise around the Suke (6), the movable contact H is moved away from the fixed contact 9Q. After that, the handle (2) is rotated counterclockwise by the biasing force of the tension spring (3), and the roller (9) is moved between both latch surfaces. (5a) (
The roller (9) is located between the locking portion (7a) and the locking portion (7a).
) is clamped between both latch surfaces (5a) (5b) and the locking part (7a), and the σ pin (4) is locked, turning OFF as shown in Figure 1.
It will be similar to the situation. In other words, it is automatically reset.

Note that the above-mentioned trip is performed with a time delay characteristic. On the other hand, when a large overcurrent such as a short circuit current flows, the coil Oη is excited and the plunger force is applied to the biasing force of the push spring. The Rondo Yai is pushed out by the suction against the resistance, the locking lever (7) rotates clockwise around 1!11161, the grip of the roller (9) is released, and the U-bin (4) is locked. Release the stop. After that, it makes the same noise as when it is caused by overload flow and trips. Furthermore, this trip 1
It is performed with the characteristic t when ltIl11. However, for some reason, if the above-mentioned overcurrent trip occurs in a case where both contact sides 9Q are welded together, the roller (9)
The grip of the σ bottle (4) is released, and the handle (2) is released by the counterclockwise rotational force of the I-handle (2).
The toggle link mechanism formed by the inner end (got) and the U pin (4) bends beyond the dead point 1 from the extended state, and the pause lever (7) is rotated clockwise.
As shown in the figure, the handle (2) is in the same state as the oyp position.Also, when both contacts -9Q are welded and the handle (21) is turned off with the (2) inner edge (Ill) and σ bin 14
The toggle link mechanism formed by + is bent beyond the dead point from the extended state, and the pause lever (7) is rotated clockwise, and as shown in Fig. 4, the handle (2) is bent.
is in the same state as the OFF position. In this way, in the conventional circuit breaker, even when both contacts + 121 trowel are welded, the handle (2) is in the same position as OFF, and it looks as if the breaker is OFF (the contacts are spaced apart). ).

Therefore, there is a risk that serious accidents such as discomfort during maintenance and inspection of the circuit may occur.

[Summary of the invention]

This invention was made in order to eliminate the drawbacks of the conventional ones as described above, and provides a circuit breaker in which a pair of opposing surfaces 1c are provided in the movable element, and one of the opposing surfaces 1c can be connected to the other. is intended to provide.

[Heavenly example of invention]

An embodiment of the present invention will be described below with reference to the drawings. Fifth
6 and 6 each show an embodiment of the present invention, FIG. 5 is a side sectional view showing a contact welding display state, and FIG. 6 is an exploded perspective view shown at s1. In the figure, IIl is a notch cut out in the movable element 16), and is a notch formed between a pair of opposing surfaces, with one opposing surface serving as the second latch circle (5b), and the other opposing surface serving as a stopper. (
SC). This stopper (5C) prevents the movement of the υ bottle (4) when an overcurrent flows between the two contacts 1121 and DI due to poor welding condition.

Next, the present invention will be explained in detail. That is, no.7 dollars (
In any case where the circuit breaker is tripped due to 2) ON operation, 01PF operation, or overcurrent, the circuit breaker operates in the same way as the conventional one. When the four ends of both contacts are welded to tX for some reason, the rated gL
If the excess current flows to the circuit breaker,
Either the Rondo or the bimetallic cylinder is activated, and the retaining lever (7) rotates clockwise 10 times around the sleeve 16), releasing the grip of the roller (9) and releasing the σ bottle +41. Therefore, due to the rotational force of the handle (2) in the counterclockwise direction, the inner end (2oi) of the handle (2) and the U pin (4)
The toggle link mechanism formed by is bent beyond the dead point from the extended state, and the biasing force of the torsion spring (3) causes the handle-21, U-pier 141, and roller (9
), the retaining member (7) attempts to rotate clockwise, but the roller (9) abuts against the stopper (6C), which prevents the U-bin (4) from moving. As shown, the handle (21 position is ON and the ON-like position is in the y intermediate position. Also, with both contacts in the haze welded state, the handle (21)
Even if 0FIIF is operated, the u-bin (4) is similarly prevented from turning, and the handle (2) remains at the y-intermediate position between ON and OFF.

In this way, when the contacts are welded, remove the fault or turn it off.
When the operation is performed, the handle (2) position of the present invention is in an intermediate position between ON and OFF states.
It is possible to clearly distinguish between the ON and 0IFF states of the circuit breaker.

In the above embodiment, one roller (9) was provided, but the roller t91t' is divided into eight parts, and the nine divided rollers (9) are the first roller (9). Second latch surface (5”) (
61)) and the locking portion (7a), respectively, and the same effect as in the above embodiment can be achieved.

〔Effect of the invention〕

As described above, according to the present invention, the movable element is provided with a notch having a pair of opposing surfaces, and one opposing surface is a latch surface and the other opposing surface is a locking surface. Since the contact welding indication can be performed at the non-driving position with a simple structure, it has the effect of preventing a serious incident from occurring.

[Brief explanation of drawings]

Figures 1 to 3 show conventional circuit breaker metals in both holes; Figure 1 is a side sectional view showing the OFF state,
The figure is a side sectional view showing the ON state, Figure 8 is a 1lIIWr side view showing the mt-1lIIWr state at the moment of tripping, and Figure 4 is the state when the contacts are welded due to supercurrent flow! FIG. 5 and 6 both show one embodiment of the present invention, FIG. 6 is a side sectional view showing the contact welding display state, and FIG. 6 is an exploded perspective view showing the main parts thereof. . In the figure, (1) is the housing, (2) is the operation handle, (4) is the σ bottle, (6) is the mover, (5a) and (6b) are the first and second latch surfaces, (SC) is a stopper, (7) is a locking lever, t9+r10-ra, (l is a movable contact, Q@ is a fixed contact, 0η is a coil, sub is a plunger, and 219 is a rond. υ is a notch. In the figures, the same reference numeral 1 indicates the same or equivalent parts. Agent Masuo Ohatsu

Claims (1)

[Claims] an operating handle that can be turned ON and OFF from outside the casing; a σ pin formed in a substantially U-shape, one end of which is rotatably connected to the operating handle, and forms a toggle link mechanism with the operating handle; Nine rollers are rotatably loosely fitted on the other end of the pin, are rotatably supported and have a latch surface disposed opposite the roller on one rotary end, and the other rotary end has a latch surface disposed opposite to the roller. A movable contact t disposed opposite to the fixed contact in the upper part; a movable element biased in a direction in which the movable contact is separated from the upper ε fixed contact; rotatably supported on the movable element; In addition, a locking lever whose rotating end cooperates with the latch surface to normally clamp the roller, and when an overcurrent of a predetermined value or more flows, releases the clamping and separates the movable contact from the fixed contact. The movable element is provided with a pair of opposing surface cutout portions, one of the opposing surfaces is used as the latch, the other opposing surface is used as a stopper, and both of the contacts are provided with an overcurrent tripping device. When welding is sudden and excessive flow is removed, or when the 0FIF operation is performed using the above operation /-/$, the stopper prevents the small t- of the σ bottle and the operation handle is turned ON and 0FIF. A circuit breaker characterized by being in an intermediate position.