JPS60151927A - 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 is constructed as shown in Figures O1 to O8. It is a side sectional view showing the state at the moment of popping. In the figure, Hl
is a base made of an insulating material, (2) is a /-endle that is rotatably supported around a shaft (101) made up of a part of this base ix+, and (3) is attached to the shaft (101). Hang one end of the torsion spring on the base fil, the other end on the handle (21), and attach it to the handle (21).
1t - Forces in the counterclockwise direction. (4) is formed into a U-shape, one leg of which is rotatably inserted into a hole (not shown) drilled in the inner end (201) of the handle (2); +5; ) n A latch with a hole (not shown) into which the other leg of this U pin (4) is rotatably inserted, (7) is connected to the latch (5) by a shaft (6). The shaft (
8), the central portion of the movable element (7) is rotatably supported. Reference numeral (9) denotes a lever rotatably supported by the shaft (8), and a hole at one end (901) of the lever normally engages with the latch (5). (10) is the shaft attached to the movable element (7), (1 is this shaft (
10) A tension spring wrapped around the top, one end of which is hooked to the shaft (8) and the other end to the lever (9), biasing the lever (9) counterclockwise. It is. 0
No is l1liT fixed to one end of the movable element (7).
The moving contact point and the zero field are the axis % (
14+ is a tension spring stretched between this shaft 031 and the above-mentioned shaft (lO), Qc9i is the stator identified in the above-mentioned page 1), and ), one end of which is electrically connected to the stator (151), and the other end of which is electrically connected to the flexible copper stranded wire (to), α91.
U is a terminal electrically connected to the flexible copper strand α barrel, and is used to connect an external conductor (not shown) to the wire presser wire and terminal (2) υ. (2) is a yoke that is housed in the base 11+ and forms a magnetic path, and (b) is the coil αη.
The plunger is attracted to the left in the figure against the spring force of the push spring (241) when the coil aη is energized.
is wound around the bobbin, and the above-mentioned plunger (
c) is loosely fitted.

niI: is the rod that is driven to the left when the plunger (support) is attracted; @ is the insulating tube attached to the flexible copper stranded wire (I); An insulating barrier that insulates and isolates the arc extinguishing chamber (6) described later, 4 is a flexible steel stranded wire whose one end is electrically connected to the 0T blocker i7) K, the figure shows this flexible steel stranded wire. - A bimetal whose other end is electrically connected, 0υ is a terminal to which the other end of the bimetal is fixed, and is connected to an external conductor (not shown) through a terminal (to). (to) is the adjustment screw screwed onto the tip of the bimetal, (to) is the insulating tube attached to the flexible copper strand, and (to) is the insulating tube whose one end is connected to the terminal 0υ. The other end is fitted into the groove of the base il+. @ is the base;
an upper edge barrier interposed between 11 and the arc runner (g);
(1) is a mounting bracket provided on the base [11], which can be attached to a rail (not shown) with a single touch. One end of 0η is hooked to the base (l), and the other end presses the mounting bracket 10 in the row direction. (
6) is an arc extinguishing chamber that extinguishes the arc generated between the movable contact (121) and the end of the fixed contact, and a plurality of grid rings are supported by a pair of side plates (2) at a predetermined interval.
is a barrier for arc discharge.

Next, the operation of the conventional starting circuit breaker will be explained.

That is, when the handle (+21'ii) is turned clockwise (ON operation) from the OFF state of the circuit breaker shown in FIG.
It is transmitted to 0T#J child (7) by M axis (6),
The mover (7) rotates counterclockwise around the entire center of the shaft (8),
The tllr auxiliary contact (12) contacts the fixed contact a~. Furthermore, there is a handle (2)! When turning 121, the shaft (8) moves slightly along the groove formed in the base fil, so that the inner end (201) of the handle (2) and the U pin (4
) is extended beyond the dead point, and the internal end (gol) of the handle (2) is retained on the base 11), completing this series of ON operations, as shown in Figure 2. The state shown is shown. In addition, the movable contact [+2
1 and the fixed contact (16) is generated by the tension spring Hvc. Next, from the ON state of the circuit breaker shown in Fig. 2, when the handle (2) is rotated to the left (OFF operation), the internal 4 (2ol) of the hand/L/i2]
The toggle link mechanism formed by the pin ++I (!:) bends beyond the dead point, the mover (7) rotates clockwise around the shaft 18, and the movable contact H moves from the fixed contact (from I to It is opened and becomes the OFF state shown in Fig. 1.Next,
When a relatively small overcurrent such as an overcurrent flows,
No (Imetal is curved due to its own Joule heat generation,
) The adjustment screw ■ provided at the tip of the metal (9) presses the lever (9), and the /< -+91 rotates clockwise around the entire center of the shaft (8), and the latch (5) and lever (9)
becomes unlatched.

Therefore, due to the biasing force of the tension spring (14), 0Jlltl
The J element (7) rotates clockwise around the center of the song (8), and the movable contact ll2) is separated from the fixed contact 1J6), resulting in a "trip" state as shown in FIG. Thereafter, the handle i21. Through the U pin (4), the latch (5) rotates clockwise around Mt61', and the latch (5) engages the lever (9) K.
It is locked and becomes the same as the OFF state shown in FIG. In other words, it can be reset automatically. Note that the above trip is performed with a time delay characteristic. On the other hand, when a large overcurrent flows before the short-circuit current, the coil θη is excited and the plunger (c) resists the urging force of the push spring.
The rod end is pushed out by suction, the lever (9) rotates clockwise around the entire center of the shaft (8), and the latch (5) and lever (9) are disengaged. In this case, the operation is similar to that caused by an overload current, and the trip occurs. In addition,
This trip will take place at 2pm. However, conventional circuit breakers have complicated opening and closing mechanisms;
In the event of a trip caused by a short-circuit (θ), the time from short circuit occurrence to contact opening (contact opening time) becomes longer, and the disadvantage is that the ability to interrupt short-circuit current (breaking capacity) is not very high. Moreover, because the conventional circuit breaker has a latch (5), it has the disadvantage that it is complicated to assemble, is difficult to assemble, and is expensive.
Since the latch (-(9)) is configured to be locked by hooking into a hole drilled in the lever (-(9)), the trip can be removed by shearing the latch (5) and the lever (9), and the latch (5)/ ,<
-+91 may not release smoothly, or after tripping, the latch (5) may not be retained in the -+91 hole and may not automatically reset, resulting in unstable operation.

This invention was made in order to eliminate the drawbacks of the conventional ones as described above, and the latch member was abolished, and the latch surface provided on the mover and the locking part provided on the locking lever were respectively To provide a complete circuit breaker that has the same breaking performance and stable operation, and is simple in structure and easy to use, by the abutting roller and the second roller that is loosely fitted into the U pin and connected in series. This is the entire purpose.

[Example of invention husband]

Hereinafter, a part of this invention will be explained according to the diagram. Figure 4 to off-line diagrams all show instant embodiments of this invention.
Figure 4 shows its OFF state, and Figure 5 shows its ON state.
FIG. 6 is a side sectional view showing the tripped state, and the off view is an exploded perspective view showing the main parts. In the figure, 2) is an iT cutter rotatably supported by the shaft (8) supported on the base +11, and has a pair of latch surfaces (46a) at one rotating end; What is the purpose of the nine auxiliary contacts Q21 disposed at the other rotating end facing the fixed contact H? And the movable element M
The above-mentioned shaft (lO) attached to the vc and the above-mentioned base Il+
The above-mentioned power supply spring H is stretched over the above-mentioned shaft attached to
VC, the 0T# contact H is constantly biased in the direction of opening and separating from the fixed contact t161. 1 force above axis (8)
0]' is a locking lever rotatably supported on the supporter (to) and having a locking portion (47&), and is movable by a torsion spring wound around the shaft (8). It is always biased in the opposite direction to the biasing direction of the child. )...is the above U
An oar is rotatably fitted and connected to the other leg of the bottle (4).

A second roller (on this other roller) is on the latch surface (46&), and the second roller is on the locking part (47&).
The other leg of the σ bottle (4) is normally in contact with the a).

Next, the present invention will be explained in detail. That is, in both the OFF state of the circuit breaker shown in Fig. 4 and the ON state of the 1st river circuit breaker shown in Fig. 5, the J pin (4) is connected to the mover via each roller. Latch 1lfl (46a)
The U pin (4) is held by the locking part (4711L) of the locking lever.

When the handle (2) is turned to the right (oN operation) from the 0F11' state of the circuit breaker shown in Figure 4, the handle
The toggle link mechanism formed by the same end (201) and the jump pin (4) of 2) extends beyond the dart boin +-t-,
The movable element (461id r1181k rotates counterclockwise around the center, and the =T moving contact 0 connects the fixed contact Q6iVC, resulting in the O'N state shown in Fig. 5.Next, the handle (2
) When it is rotated to the left (OFF operation), the toggle link mechanism formed by the inside 4 (201) of the handle 2) and the U pin (4) bends beyond the dead point, and the mover (T) moves toward the shaft ( 8) Rotate clockwise around the entire center and move the movable contact 02
1 is separated from the fixed contact O0, resulting in the OFF state shown in FIG. Next, when a relatively small overcurrent such as an overload current flows, the Nohei Metal phosphor is bent due to the Joule heat generated by the eyes, and the E
The Af screw ■ presses the retaining lever θ, and the retaining lever 67
1 rotates clockwise around the shaft (81',
47a) respectively. Therefore, the lock of the U-bin (4) is released, and the force of the tension spring +14) causes the mover θ to
The ring rotates clockwise around the shaft (8), and the movable contact [+
21 is opened and separated from the fixed contact αQ, resulting in an instantaneous trip state as shown in FIG. Thereafter, the handle (2) is rotated counterclockwise by the biasing force of the torsion spring (3), and the steps on each roller are connected to the latch surface (46a) and the locking portion (47a).
The σ bottle (4) is held between the latch surface (46a) and the locking part (47a) through each roller ring, so that the σ bottle (4) is locked. The state is similar to the OFF state shown in FIG. The casing is one that resets automatically. On the other hand, when a large overcurrent such as a short circuit current flows, the coil 11η is energized, and the plunger is attracted against the urging force of the push spring (B), causing the rod m
is pushed out, and the locking lever (b) is ll1ift 18
1' in a clockwise direction, each roller separates from the latch surface (4ea) and the locking part (47a), and releases the lock of the U-pin (4).

After that, the circuit operates in the same way as the case due to overload current and trips. In the event of a trip due to such an overcurrent, the present invention is designed so that the first roller smoothly rotates in the A direction and the second roller smoothly rotates in the opposite directions in the off-line diagram. Laura (6) ■ divides and composes.

In addition, the conventional latch (5
), the contact opening time (the time from the occurrence of a short circuit to the time between the contacts) is shortened, so the short-circuit current can be cut off quickly, and the cutting performance is improved. It is. Furthermore, the present invention has a latch (5)
Since the shaft (6) and shaft (6) are not required, the structure is simple, and the conventional one requires inserting the U pin (4) into the hole of the latch (6), ) It is necessary to insert the holes 1f6)i into each of the holes 1f6)i to assemble, but as is clear from FIG. It is possible.

When the circuit breaker is tripped or automatically reset, the valley rollers () rotate smoothly in opposite directions, allowing the σ bottle (4) to be smoothly locked and unlocked. The operation is stable.

〔Effect of the invention〕

As described above, according to the present invention, the latch surface provided on the movable element and the first and second rollers iU bin that respectively abut on the recessed locking part on the locking lever (-). By loosely fitting and connecting them, the contact opening time is shortened.
What is the effect of improving the breaking performance and stabilizing the operation? Furthermore, it has a simple structure and can be assembled automatically, so it has the advantage of being a circuit breaker that can be manufactured at low cost.

[Brief explanation of the drawing]

Figures O1 to O8 all show conventional circuit breakers. Figure 1 is a side sectional view showing its OFF state, Figure 2 is a side sectional view showing its ONN state, and Figure 3 is its side sectional view. It is a side sectional view showing a break at the moment of tripping. Figures 4 to OFF diagrams all show an example of this invention, and Figure 4 shows the O]lI'F-like disease.
I cross-sectional view, the fifth factor is a side cross-sectional view showing its ON state, and the sixth factor is a side cross-sectional view showing its ON state.
The figure is a sectional side view showing the state at the moment of tripping, and the off view is an exploded perspective view showing the main parts. In the figure, (2) is the operating handle, (4) is the U pin, θ force is the dI contact, (161i' is the fixed contact, naq mover, (
+aa) is the latch, 0η is the locking lever, (47a) is the locking lever, (49) N II and 11. This is the second roller. In addition, in the figures, the same reference numerals indicate the same or equivalent parts. Agent Masuo Odai Figure 1 t! s : 2 r-l No. 3 Figure 11 1 4Zfθ Figure 5 もF, 00 (Figure 5 -1. Gansho 59-8884 No. 2, Name of the invention (j, circuit breaker; U. To the representative of the person making the amendment, Katayuni Kata 4, f (Representative person 5, subject of amendment (1) in the description) , the claims are amended as shown in the attached sheet. (2) The specification is amended as follows. .A U-pin that forms a toggle link mechanism together with the operating handle, a loosely fitted I that is rotatably attached to the other end of the U-bin, and first and second rollers that are connected and rotatably supported. ■One rotating end has a latch surface facing the first roller, and the other rotating end has a movable contact facing the fixed contact. This movable contact is attached to a movable element which is biased in the direction in which it opens from the fixed contact (1), and to a roller (1) rotatably supported on this movable element (1), and (1) 2 at the rotation end. A locking lever is provided with a locking portion disposed oppositely and always biased in a direction opposite to the biasing direction of the movable element, and a roller Tac!f, 1 is attached to the latch surface. , upper NF ffJ'r 2 are in constant contact with the locking portions, so that the upper MP
In addition to the U pin, the ``++;
The circuit breaker is characterized in that when the above-mentioned lock is released, the upper WE' locking lever operates and both of the contacts open.

Claims (1)

[Claims] ■ A pin that is formed approximately in a U-shape, one end of which is rotatably connected to the operating handle, and forms a toggle link mechanism together with the aforementioned operating nondle; Established O1. The second row is rotatably supported by 2%, has a latch surface t arranged at one rotating end facing the above-mentioned roller, and has a fixed contact at the other rotating end. The movable contacts disposed facing each other include a movable element which is always biased in a direction in which the movable contact is separated from the fixed contact, and a movable element rotatably supported by the movable element, and a rotating end. The above-mentioned OT! VC is always biased in the opposite direction to the biasing direction of the 40 rollers. , when the other end of the U pin is locked and both contacts are connected and separated by the operation/handle, and an overcurrent of more than a predetermined value flows, the locking lever (-) is released so as to release the lock. A circuit breaker 0 characterized in that the above-mentioned contacts are opened when the circuit breaker operates.