JPS60148026A - 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 shown in side sectional views showing the states shown in Figures E5 to O8, respectively. In the figure, (1) is fba
A base made of wood, (21 is a handle rotatably supported around a shaft (101) which is a part of this base (1), (3J is a twist mounted on the shaft (101)) One end of the spring is hung on the base +11 and the other end is hung on the handle (2) to bias the handle (21) counterclockwise. The legs are inside 4 (BOI) of the nondol (2) above.
To! The other leg of the σ pin (link) (5) is rotatably inserted into the hole (not shown) provided in the J-shaped hole (not shown). (not shown)
The latch (7) is connected to the latch (5) by a l1lIII-6), and the mover (7) is connected to the latch (5) by a shaft (8) supported on the base (1). )
The central part of the frame is rotatably supported. (9) is upper r3
i! , a lever rotatably supported by a shaft (8),
When completed, the hole at one end (901) is connected to the latch (5+).
It is something that engages with. (10) is the above-mentioned mouth” mover (7)
A tension spring is wound around the shaft (10) attached to the shaft, one end of which is attached to the shaft (10) above 11i[1It81
The other end is hooked to the lever (9) and urges the lever (9) counterclockwise. (12H
A contact point fixed to one end of the iJ mover (7),
11(8) is the shaft attached to the base (1), En is the tension spring stretched between this Tsumugi t131 and the above 1lIlb(10), te51 is the stator fixed to the base +11, and utn is the Above 0IIIAO contact +121 VC
The fixed contacts Qη are connected to the stator (1b) so as to be opposite to each other, one end of which is connected to the above-mentioned inverter (5)rCIJi, air rC, and the other end of which is connected to the steel wire (181VC).
- a coil electrically connected, the α field is the flexible copper stranded wire 11
81 vc 4-voltage VC-connected terminal 1, which connects an external conductor (not shown) with a spring presser and a terminal υ. 1 phantom is a yoke that is attached to the base +11 and forms a magnetic path, @ is a yoke that is attached to the base +11 and forms a magnetic path, and @ is a yoke that moves to the left in the figure +, f against the spring force of a push spring when the coil (17) is excited.
The plunger to be pulled, (to) is a bobbin around which the coil (Iη) is wound, and the plunger is loosely fitted into the hollow part of the bobbin. ■The force is the flexible ML stranded wire (+ the insulating tube attached to the barrel, μs is the insulation barrier that insulates and isolates the yoke (d and the arc extinguishing chamber described later),
4 is a sinkable copper stranded wire whose one end is electrically connected to the mover (7), - is a bimetal whose other end is electrically connected to this flexible copper stranded wire, and oXl is this bimetal - 〇 - A terminal fixed at one end, which is used to connect an external conductor (not shown) with the wire presser (2) and the terminal (■).轡 is an adjustment screw screwed onto the tip of the bimetallic wire, (to) is an insulating tube attached to the flexible copper stranded wire, and (to) is an insulating tube whose one end is connected to terminal 3υ! The other end of the base (1) is fitted into the groove of the base (1). @ is the base i above
■ is the insulating hole (rear) interposed between l+ and the arc runner (to); The side plate made of solid material, □ is a mounting bracket cut into the base (1) above, and can be attached to the rail (not shown) with one touch.
), and the other end of the bracket presses the mounting bracket to the right. 12/ is an arc extinguishing chamber for extinguishing the arc generated at the oJ excitation point and the delimiting contact (16), and a pair of 1ilJ
(O supported by M (B)) is for arc exhaust (required at the rear, a solid circuit breaker q) is in operation.

That is, as shown in Figure 1: From the OFF state of the open circuit breaker,
Handle +21: When turned clockwise (ON operation), the movement of the knob +21 goes through the σ bin (4) and the latch (5), and is tri by the draw (6)! IIIJ element (7), the movable element (7) rotates counterclockwise around the entire center of the shaft (8), and the town contact +121 becomes the identification contact (1 in 14).

In addition), Ndol (21 is 1! If you roll 21, sleeve (8)
moves slightly along the groove formed in the base (1), so the internal J'(11) and υ of the node 2)
The torque link structure formed by the pin (41) extends beyond the dead point and the inner end (20) of the handle (2)
This series of o
When nj1 is completed, the state becomes iM as shown in Figure 2. In addition,
The welding pressure between the oJ moving contact Q21 and the fixed contact (1→ is generated by the tension spring α).Next, due to the bad ON condition of the circuit breaker shown in Fig. 2, (O
FF operation), then handle + g + inner end (li)
The toggle link machine groove formed by and σ pin (4) faces the layer beyond the dead point, and the mover (7) is: 1lIli
It rotates clockwise around the center of 81 k, and the 01' auxiliary contact (1 bottle is separated from the 1 fixed contact river, resulting in the OFF state shown in Figure 1). When a small overcurrent flows, the %/(imetaru bends due to its own Joule heat generation, and the double-walled screw (end) provided at the tip of the bimetal (increase) presses the lever (9), causing the yumeru to bend. '-t
ill rotates clockwise around 1llllII (8), and the latch (5) and lever (9) are disengaged.

Therefore, the qf cutter (7) rotates in the clockwise and counterclockwise directions around 11ilII (8) due to the biasing force rC of the tension spring I.
1' auxiliary contact a21 is separated from the fixed contact (1→, and enters the trip 1 period state as shown in FIG. 8. After that,
The handle is +21 due to the biasing force of the torsion spring +31,
Through the U pin (4), the latch (5) is
6) Rotate clockwise around k, and the latch (6) is locked to the lever (9), resulting in the same OFF state +1B shown in Figure 5. 1. It is automatically reset,
Ruru. Note that the above-mentioned trip is performed with a time delay feature. On the other hand, when a large overcurrent flows due to a short circuit, the coil IIη is excited, the plunger (c) is attracted against the biasing force of the push spring, and the rod is pushed out. The lever 191 rotates in the 114J direction around the shaft (8), and the latch +51 and the lever (9) are disengaged. The stage will trip in the same manner as in the case of overload single flow. Note that this trip is made instantaneously by special order. However, because conventional circuit breakers have complicated opening/closing mechanisms, in the event of a trip due to overcurrent, the time from the occurrence of a short circuit to the opening of the contacts (contact opening time is long, and the ability to interrupt the short circuit' current t) (Cut-off capacity) cannot be improved very much.Furthermore, conventional circuit breakers have a disadvantage that the latch (5) is used in a different manner, making the assembly complicated, poor in ease of assembly, and expensive. Also, because the latch (6) is held in place by the hole in the lever +91, the latch (5)
) and the lever (9) due to shearing process 9, the latch +51 and the lever (9) did not come off smoothly. After the trip, the latch i51 is retained in the hole of the lever (9). There was also a drawback that the system did not reset automatically and the operation became unstable.

This invention was made in order to eliminate the drawbacks of the conventional ones as described above, and by locking the latch member at B6 and clamping the roller provided at the end of the link by the movable element and the retaining lever. The purpose of this invention is to provide a circuit breaker that is simple and inexpensive, with improved breaking performance and stable operation. This will be explained according to the diagram. Fourth
Figures to OFF diagrams all show one embodiment of the present invention. Figure 4 shows the QF'F-shaped heddle, Figure 5 shows its ON state, and Figure 6 shows its state at the moment of tripping. The side 1di side view and the off view are respectively exploded perspective views showing the main parts. As shown in the diagram, the movable element is supported in one section so as to be able to rotate 9 times by the shaft tal vC supported by the above P-X Il+; 2
There are a total of 11 latches (46a) and (46b), and the movable contact (+121) is disposed opposite the fixed contact (0) at the other rotating end. The shaft (10) housed in the movable senryo and the □ pace il
The movable contact (12+) is always biased in the direction in which the movable contact (12+) is separated from the solid contact cQ by the tension spring α stretched on the +11III (II) housed in the +11III (II).

(1υ is a locking lever that can be rotated by the shaft (8) to the oJ supporter (transferred) and is a locking lever that is similar to the locking lever (47a), and is a locking lever that is wrapped around the shaft (8). The movable element is always biased in the opposite direction to the biasing direction by the spring.

) is a roller that is rotatably loosely fitted to the other leg of the U-bin (4), and is normally attached to both the latch surfaces (46a) (46).
The operation of the present invention will now be explained with reference to b) and the zero order held by the retaining portion (47a). That is, both the anastomosis between the OFF state of the dark circuit breaker shown in FIG. 4 and the ON state of the circuit breaker shown in FIG.
It is clamped between both latch surfaces (aaa) (46b) of the d-element 1 and the retaining part (47a) of the retaining lever θ, and the U pin +
41 is retained. If the circuit breaker v shown in Fig. 4 is in the OFF state, turn the handle 217 to the right (ON operation).
Then, the inner end (205) of the handle (2) and the U pin (
4) The toggle link mechanism formed by extends beyond the put point t, and the cir motion θQ is +1lII]t81
The movable contact +121 is rotated counterclockwise around k, and the movable contact +121 comes into contact with the fixed contact ob, resulting in the ON state shown in FIG. Next, turn the handle 12) to the left ('OFF operation).
Inner end (201) of nondle (2) and □゛σ pin (4)
Both sides of the toggle link formed by and bend beyond the dead point, the 0J exciter member rotates clockwise around the entire center of the axis (8), and the of control contact +121 changes to i! Constant contact (open from trouble,
++1 and OF shown in Fang 4 diagram, ? state.

Next, when a relatively small overcurrent such as an overload current flows, the bimetal is bent by its own Joule heat, and the tip of the bimetal is bent by the regulating screw.
presses the locking lever θη, and the locking lever force is applied to the shaft (8)
Rotate clockwise around the center to release the rollers. When the U-bin (41) is released, the tension spring (I41) is released.
Due to the biasing force of 1, the l = J [child 2] rotates clockwise around the shaft (8), and the movable contact +121 is separated from the opposite contact H, resulting in a trip moment 16 as shown in Fig. 6. Become. After that, the handle (2) is moved by the biasing force of the torsion spring 13+.
rotates clockwise again, and the rollers touch both latch surfaces (46a
) (46b) and the locking cap (47 &), and the roller
7a) and the U pin 14) is locked, resulting in the same state as the OFF state shown in FIG. In other words, it is automatically reset. On the other hand, when a large overcurrent such as a short-circuit current flows, the coil lIη is excited, the plunger (2) is attracted against the urging force of the pusher, and the rod is pushed out. Then, the locking lever θ is aligned with the axis (
8) It rotates clockwise around t'', and the roller (41) is released from its grip, and the σ pin (4) is released from rest.O After that, it makes the same operating noise as in the case of overload-flow and trips. In the event of a trip due to such an overcurrent, the device of the present invention has a four-component structure in which the mover (2) is connected to the U pin (4) via the roller IIt, and the latch 1 is more stable than the conventional one.
5), the contact opening time (from Tanji Mitsuo to contact I
, filtration time) becomes shorter, the short-circuit region flow is quickly interrupted, and the interrupting performance is the same as above. For convenience, the present invention has a latch 15)
The structure is 0% simpler as the shaft (6) is not required, and the conventional one has a U pin +4) inserted into the hole of the latch (5).
, the shaft (
6), however, as is clear from FIG. 6, the present invention does not require this, and can be manufactured at low cost as it can be assembled automatically.

In addition, tripping and automatic reset of the circuit breaker can be avoided, and since the roller rotates, the %U pin (4) can be smoothly held and unlocked, resulting in stable operation.

In addition, in the above-mentioned embodiment, a U pin 141 formed in a U-shape was provided as the link (4).
The shape may be other than a pin, and the same effect as in the above embodiment can be achieved.

[Mimama effect]

As described above, according to the present invention, the contact opening time is shortened by sandwiching the roller provided on the link between Souko Machi and the retaining lever, which improves the breaker performance and stabilizes the operation. This will improve the effect obtained. History has 1. A circuit breaker that can be manufactured by any woman because it is made of Mizozoura single-piece and can be assembled automatically? The effects you can get are also something to see.

[Brief explanation of the drawing]

Figures 1 to 31 all show the conventional old l-way breaker. Figure 1 is a side sectional view showing its OFF shape, Figure 2 is a sub sectional view showing its ONN shape, and Figure 2 is a sub sectional view showing its ONN shape. Figure 3 shows the DI!71 ship in its state at the moment it tripped! It's a matter of fact. Figures 4 to 4 each show an embodiment of this invention.
Fig. 4 is a side sectional view showing its OFF position, Fig. 5 is a 11111...i side view showing its ON state, and Fig.
7 is the 1III Ranji diagram showing the state at the moment of tripping, and the front diagram is an exploded perspective view showing the main body. In the diagram, 121 is the Ei 1 handle, (4) is the link, and the I
121 is a 6IdJ contact, 01 is a fixed contact, @ [9n a
r moving element, (46&) (46b) is the latch surface, @ is the retaining lever, (47a) [i4 stop capital, (II4tr10-ra) e. In addition, the same symbol 9 in the figure is the same or the contact part Agent Masuo Odai Procedural amendment (self-presentation) Date: 31st August 1980 1, Issue f'1: Patent Application No. 59-5071 2, Name of the invention: Circuit breaker 3. Person making the amendment 5, subject of the amendment (1) Claims section of the specification (2) Detailed description of the invention section of the specification (3) Drawing 6, Contents of the amendment (1) In the specification, The scope of the claims is amended as shown in the attached sheet. (2) In the specification, on page 12, line 18, the word ``clutcho'' is corrected to ``latch''. (3) Of the drawings, Figure 1 is attached to the attached sheet. The above claims are as follows: (1) A link whose one end is rotatably connected to an operating handle and forms a toggle link mechanism together with the operating handle, and the link is rotatably provided at the other end of the link. roller, a rotatably pivoted nail having a latching surface disposed opposite the upper P roller at one pivoting end, and disposed opposite a fixed contact at the other pivoting end; a movable element having a movable contact and biased in a direction in which the movable contact separates from the fixed contact; a movable element rotatably supported on the movable element; The roller is normally held between the latch surface and the locking portion, and the operation handle is used to control both the rollers. A circuit breaker characterized in that when the contacts are connected and separated and an overcurrent of more than a predetermined value flows, the locking lever is activated to release the clamping, and both the contacts are opened and separated.

Claims (1)

[Claims] +11 A link whose one end is rotatably connected to the operating handle and forms a toggle link mechanism together with the operating handle; a roller rotatably provided at the other end of this link;
What is the latch thi that is rotatably supported and placed opposite the roller at one rotating end, and the 1liT auxiliary contact placed opposite the fixed contact at the other rotating end? The retractable contact is rotatably supported by the MI element which is biased at time g in the direction of opening from the fixed □ contact, and this +zJ exciter, and the latch is attached to the rotating end. A locking portion t is arranged opposite to the latch surface and is always biased in the direction 111. A locking lever is provided, and when the roller is clamped between the latch surface and the locking portion. When both of the contacts are brought into contact with each other by the operating handle and an overflow of a predetermined value or more flows, the locking lever is operated to release the clamping, and the two contacts are opened and separated. circuit breaker.