JP3506052B2 - 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 having two exhaust holes for individually discharging gas by arc generated when various contacts are forcibly opened.

[0002]

2. Description of the Related Art As a circuit breaker of this type, Japanese Unexamined Patent Publication No. Hei 11
-670496 exists. In this product, two pole contacts are arranged side by side in the width direction of the body inside the body, and an exhaust hole for individually discharging the gas of the arc generated when the contacts are forcibly opened is formed on one side surface of the body. They are arranged side by side in the width direction, making it difficult for various arcs to mix in the body.

[0003]

However, in the above-mentioned circuit breaker, since the exhaust holes are arranged side by side in the width direction of the body, the arcs generated by multiple poles are extended to the outside of the body. When it came out, it was easy to mix outside the body, which could cause a short circuit.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a circuit breaker which is unlikely to cause a short circuit between electrodes even when an arc extends to the outside of the body. It is in.

[0005]

In SUMMARY OF to the invention of claim 1 includes two fixed contacts which is fixed to the fixed contact, and two movable contact which is fixed a moving contact that faces the movable contact and separation to the each fixed contact A handle for holding the two movable contacts operably, and a handle for connecting and disconnecting the movable contacts to and from the fixed contacts through the opening and closing mechanism, and a handle for holding the handle from the outside. And a body having two exhaust holes for discharging gas generated by an arc generated when the movable contacts are separated from the fixed contacts,
In the circuit breaker provided with, the exhaust holes are formed in upper and lower two stages in the height direction of the body , and
The holes are characterized in that the outer openings are formed at an angle away from each other .

[0006]

According to a second aspect of the invention, in the first aspect of the invention, the movable contacts and the fixed contacts are arranged side by side in the width direction of the body, and are arranged vertically in the height direction of the body. Then, a partition member for isolating each fixed contact is provided, and the movable contact and the fixed contact are separately housed in two compartments divided by both side walls in the width direction of the body and the partition member. And an exhaust hole of the fixed contact is formed above the container in one compartment, and an exhaust hole of the lower movable contact and the fixed contact is formed below the container in the other compartment. .

According to a third aspect of the present invention, in the second aspect of the present invention, the partition member extends substantially parallel to the side wall of the container between the fixed contacts, and the device on the fixed contact side of the upper stage. A vertical wall portion for accommodating the upper fixed contact together with the side wall of the body, and a bottom wall together with the side wall of the lower fixed contact side of the body extending from the lower end of the vertical wall portion substantially parallel to the bottom surface of the body. The lateral wall portion that houses the conductor connection portion of the fixed contact, and the device on the fixed contact side of the lower stage that bulges from the vicinity of the fixed contact of the fixed contact of the upper stage toward the side wall of the device on the fixed contact side of the lower stage A lateral wall portion, a bulging portion, and both side walls of the container body, the fixed contact of the lower fixed contact is laid across the both side walls of the container body. It is characterized by having done.

[0009] In the present invention of claim 4, in the invention of claim 3, a rotatable having a kerf which the closing mechanism is in communication with the each partition to the lateral fitting inserted individually each movable contact from both sides Cross Bars are provided, and stoppers are provided on both side walls of the partition member and the body, with which the movable contact side tip end surfaces of the crossbars abut in a state where the movable contacts are separated from the fixed contacts. Is characterized by.

According to a fifth aspect of the invention, in the fourth aspect of the invention, a concave-convex engaging portion is provided on the tip end surfaces of the stopper and the crossbar.

According to a sixth aspect of the present invention, in any one of the second to fifth aspects, the partition member is formed of a material containing a hydroxide of an alkaline earth metal.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to FIGS.

The circuit breaker of this embodiment has two fixed contacts 1 having fixed contacts 2A and 2B fixed thereto as shown in FIG.
2A, 12B and two movable contactors 3A, 3B having fixed fixed contacts 2A, 2B and movable contacts opposed to each other so as to be freely separated from each other.
And a handle 6 for holding these two movable contacts operably and holding the movable contacts to and from the fixed contacts 2A and 2B through the opening and closing mechanism 5, and the handle 6 Of the movable contacts 3A. , 3B discharge the gas by the arc generated when the fixed contacts 2A, 2B are separated from each other 2
The two exhaust holes 110 and 109 are formed in two steps in the height direction of the body 1.

The first side case 1A made of synthetic resin on both sides
And the second side case 1B are overlapped and coupled to each other, and two fixed contacts 2A and 2B arranged side by side in the width direction of the body 1 are connected to the fixed contacts 2A and 2B. Two movable contactors 4A and 4B having movable contacts 3A and 3B fixed to each other so as to be freely separated, and these two movable contactors 4A and 4B.
An opening / closing mechanism 5 for driving B, and each movable contact 3A, 3B via the opening / closing mechanism 5 by an on / off operation of a handle 6.
Is configured to contact (separate / contact) the fixed contacts 2A and 2B, and the fixed contacts 2A and 2B and the movable contacts 4A and 4B are arranged vertically in the height direction of the body 1. One of the movable contacts 4A and 4B, which is provided and is interposed between the two fixed contacts 2A and 2B in the height direction, of the movable contacts 4A and 4B.
And the fixed contact 2A with which the movable contact 3A of the other movable contactor 4A comes in contact with and separates from the width direction of the body 1 with the movable contacts 3A and 3B separated from the fixed contacts 2A and 2B. It is placed at a height that does not intersect.

Both cases 1 are provided in one end of the body 1.
A partition member (hereinafter referred to as an intermediate case) 7 formed from a synthetic resin material containing a hydroxide of an alkaline earth metal (eg, Mg hydroxide) is disposed so as to be sandwiched between A and 1B. The recess 8 inside the side wall (outer wall) of the first-side case 1A
The second side case 1B side of the intermediate case 7 accommodates the terminal block 10A, which is a first fixed side electric circuit structure having a fixed contact 2A at one end, in a section constituted by the vertical wall portion 35 of the intermediate case 7. The terminal block 10B, which is a second fixed-side electric circuit, in which the lower fixed contact 2B is provided at one end in a partition formed by the recess 9 provided on the lower side and the side wall (outer wall) of the second-side case 1B.
Is stored.

The terminal block 10A is integrally extended with a terminal plate 11 bent in a U shape and above one end of a lower piece of the terminal plate 11, and extends from the upper end of the extension piece 11a to the extension piece 11a.
a fixed contactor 12A which is bent at a right angle to a and is integrally extended outwardly with respect to the terminal board 11, and the fixed contactor 12A
A fixed contact 2A which is caulked and fixed to the upper surface of one end of A, and a substantially U-shaped locking spring 13A which is placed on the lower piece of the terminal plate 11 and is housed in the terminal plate 11, The terminal board 11 is provided on the bottom surface of the recess 8 of the side case 1A which is inclined downward.
The lower piece is placed, the extension piece 11a is arranged along the rising wall 8a at one end of the recess 8, and the fixed contact 12A is led out of the recess 8 beyond the upper end of the rising wall 8a to form the rising wall 8a. , A fixed contact 12A on a fixed contact arranging portion 15 integrally formed with the partition wall 14 rising from the bottom of the first side case 1A in the same manner as the bottom of the recess 8 inclining.
By arranging the tip of the above, the terminal block 10A is arranged in the recess 8 as shown in FIG. The fixed contact arrangement portion 15 is formed with a recess 15a that allows the lower end of the fixed contact 2A protruding to the lower surface side of the fixed contact 12A to escape. The terminal plate 11 is formed by integrally extending a T-shaped piece 11b upward from the other end of the upper piece, and one end of a side protrusion of the upper end of the T-shaped piece 11b is attached to the inner surface of the first side case 1A. It is placed on the upper end surface of the formed convex flat portion 22. A protrusion 23 is inserted into the pressing piece 13b of the locking spring 13A on the side surface of the side piece of the terminal plate 11 to prevent rattling of the locking spring 13A.
Are integrally formed.

The locking spring 13A and the terminal plate 11 constitute a quick-connect terminal which is a conductor connecting portion, and when the intermediate case 7 is superposed on the first side case 1A, the other end portion of the first side case 1A is provided. Diagonal downward groove 1 with a semicircular cross section formed in the vertical wall
60 and an electric wire 111 inserted from the outside through an oblique downward electric wire insertion hole 16A formed by an oblique downward groove 160 having a similar shape on a wall formed on the opposing wall surface of the intermediate case 7.
The core wire (see FIG. 1) is the upper piece of the terminal plate 11 and the locking spring 13.
It is press-fitted between the upper end of the locking piece 13a of A and the upper end of the pressing piece 13b, and the core wire is locked by the tip of the locking piece 13a in the pull-out direction of the electric wire 111, and the core wire is formed on the upper end surface of the pressing piece 13b. Is pressed against the upper piece of the terminal plate 11, the core wire is electrically connected and mechanically held. This electric wire lock is released by a release handle 17, and a rotation shaft 18 provided on the lower side surface of the release handle 17 rotates into a shaft hole 20 provided on a convex flat portion 22 on the inner side surface of the first side case 1A. Freely pivoted and intermediate case 7
The shaft 36 projecting from the wall surface of the vertical wall portion 35 is rotatably supported in the recess 37 provided on the other side surface of the lower portion.
In the above, when the operating portion 17a exposed to the outside of the body 1 is manually operated to rotate in the counterclockwise direction, the drive projection 19 provided at the lower end of the locking spring 13A is provided at one side end of the locking piece 13a. It is possible to release the lock on the core wire by pushing the tip portion to bend the lock piece 13a. Reference numeral 21 in the drawing is a return spring for constantly biasing the release handle 17 in the clockwise direction.

On the other hand, the terminal block 10B is basically the same as the terminal block 10A and has a terminal plate 11 and a locking spring 13B.
And the fixed contactor 12B, the terminal block 10 is different from the terminal plate 11 of the terminal block 10A.
The terminal plate 11 of B is an extension piece 1 extending downward from one end of the lower piece.
1c is formed by extension, and the body 1 is formed from the tip of the extension piece 11c.
The fixed contact 12B is formed to extend in parallel with the bottom of the terminal plate 11 and the back piece 11d is formed to extend at a right angle from one end of the side piece of the terminal plate 11.

The locking spring 13B has the same structure as the locking spring 13A, and is placed on the lower piece of the terminal plate 11,
The protrusion 23 protruding from the side piece of the terminal board 11 is the pressing piece 1.
It is designed to be inserted into 3b.

The terminal block 10B constitutes the bottom portion of the recess 9 of the intermediate case 7, and the lower piece of the terminal plate 11 is placed on the lateral wall portion 24 extending substantially parallel to the bottom portion of the body 1. The inner strip 11d is provided along the vertical wall 25 at one end of the recess 9 and one end of the terminal plate 11 is fitted into a notch 27 formed between the lower end of the vertical wall 25 and one end of the horizontal wall 24 to extend the extension piece. When the intermediate case 7 is superposed on the first side case 1A side, the tip of the fixed contactor 12B, that is, the lower surface on which the fixed contact 2B is provided is the first side case. It is designed to be placed on the ribs 26, 26 at the bottom of 1A. That is, the fixed contact 2B includes the lateral wall portion 24 of the intermediate case 7, a bulge portion 30 described later, and both cases 1.
In the space formed between the side walls of A and 1B, both cases 1A and 1B
It is arranged across B. The recess between the ribs 26, 26 is a fixed contact 2 fixed by caulking to the tip of the fixed contact 12B.
The bottom end of the fixed contactor 12B of B protrudes to the lower surface side and escapes.

Further, the tip of the lateral projection of the upper end of the T-shaped piece 11b extended from the other end of the upper piece of the terminal plate 11 to the information is a convex flat portion 22 'formed on the wall surface of the intermediate case 7. Is placed on the top surface of the.

The locking spring 13B and the terminal plate 11 of the terminal block 10B constitute a quick connection terminal which is a conductor connecting portion as in the case of the terminal block 10A, and when the intermediate case 7 is superposed on the second side case 1B. , An oblique downward groove 1 having a semicircular cross section provided on the vertical wall portion at the other end of the recess 9 of the intermediate case 7.
60 and this diagonal downward groove 160 as well as the second side case 1
When an electric wire is inserted through an electric wire insertion hole 16B formed by a diagonal downward groove 160 provided in the vertical wall at the other end of B, the core wire is locked by the locking piece 13a of the locking spring 13B and pressed. The core wire is pressed against the upper piece of the terminal board 11 by the piece 13b to electrically connect the electric wire and mechanically lock it.

A release handle 17 'is used to release the electric wire lock. In the release handle 17', the rotary shaft 18 provided on the lower side surface is the convex flat portion 22 of the intermediate case 7 like the release handle 17 described above. 'A shaft 38 rotatably supported in a shaft hole 20 provided in the second side case 1B and protruding from an inner wall surface of the second side case 1B is rotatably supported in a recess 37 formed on a side surface of the second side case 1B. When the operating portion 17a exposed to the outside of the body 1 is manually operated and rotated, the driving projection 19 provided at the lower end pushes the tip of one end of the locking piece 13a of the locking spring 13B to lock the locking piece. The locked state can be released by bending 13a. Reference numeral 21 'in the drawing is a return spring for constantly biasing the release handle 17' in a clockwise direction.

As shown in FIG. 11, the intermediate case 7 projects toward the second side case 1B side with respect to a vertical wall portion 35 which is substantially parallel to the side walls of both cases 1A and 1B and abuts against the inner surface of the side wall of the second side case 1B. The wall that forms the bulging portion 30 that contacts and hangs from the lower surface of the bulging portion 30 is the vertical wall 25. The side wall facing the second case 1B side, the bottom wall 31, the vertical wall 32 at one end, and A recess 34 surrounded by the ceiling wall 33 is provided on the first side case 1A side. When the intermediate case 7 is butted to the first side case 1A side, the tip side portion of the fixed contact 12A of the terminal block 10A assembled to the first side case 1A side is on the step surface 31a of the bottom wall 31 of the recess 34. The ceiling wall 33 is arranged along the lower surface of the lateral wall 29 protruding from the inner surface of the first side case 1A. The fixed contact 2 fixed by caulking to the fixed contact 12A on the step surface 31a
A groove 31b that allows the lower end of A to escape is formed. Further, the vertical wall 32 is formed with an opening 39 for inserting the free end of the movable contactor 4A corresponding to the fixed contact 2A into the recess 34.

The opening / closing mechanism 5 for driving the movable contacts 4A and 4B to open and close includes an operating plate 43 which is a latch member, a crossbar 40, and a stepped locking portion 5 which locks one end of the operating plate 43.
First tripping plate 41 and second tripping plate 42
And an actuating plate 43 that is a latch member, a handle 6, a U-shaped link 44, and the like. In addition to these, two bimetals 45 and 46 that drive the opening / closing mechanism 5 when an overcurrent is detected,
Further, electromagnetic drive units 47 and 48 that drive the opening / closing mechanism 5 when a short-circuit current flows are added to form a common component.

The handle 6 is composed of an operating portion 6a, a rotating portion 6b, and a handle shaft 6c. The handle shaft 6c protruding in the center of both side surfaces of the rotating portion 6b is formed on the inner surface of the first side case 1A. Rotatably inserted into the shaft hole 49 formed in the second side case 1B and the shaft hole 49 formed in the inner surface of the second side case 1B, and held between the cases 1A and 1B. , 1B in a superposed and coupled state so as to face a window hole 50 opened on the upper surface of the body 1. A torsion spring 51 is attached to the handle shaft 6c, and the torsion spring 51 biases the handle 6 in the off operation direction at the on operation position (see FIG. 22).

The upper shaft 44a of the link 44 is rotatably inserted into the shaft hole 52 provided at the lower end of the rotating portion 6b, and is connected to the operating plate 43 via the link 44.

The operating plate 43 has bearing holes 4 provided on both sides of the center.
By inserting the lower shaft 44b of the link 44 into the 3a, the lower shaft 44b is connected to the handle 6 through the link 44, and is vertically movably arranged in the body 1.

The crossbar 40 is pivotally supported between the cases 1A and 1B by inserting the shafts 40a protruding from both side surfaces of the upper part into shaft holes 52 and 52 formed on the inner side surfaces of the cases 1A and 1B. As shown in FIG. 12, a groove 54 for laterally fitting the side portion of the movable contactor 4A is formed on the side portion on the first side case 1A side slightly below the shaft 40a, and the lower second side case 1B. Cut grooves 55 into which the movable contacts 4B are fitted in the lateral direction are provided on the side portions on the side. The movable contact side end surface is provided with stoppers 130 ... Protrudingly provided on the inner surfaces of the side walls of the intermediate case 7 and both cases 1A and 1B.
Is formed in the width direction so as to engage with the fixed contacts 2A and 2B in a separated state and to come into contact with the bottom thereof.

Here, the movable contactor 4A is made of a rigid conductive metal plate, is inserted into the cut groove 54 of the crossbar 40 from the side, and has a recess 54 provided behind the cut groove 54.
In a, the rear portion is urged upward by the coil spring 53 for contact pressure that is compressed and arranged between the lower surface of the rear portion and the bottom portion of the recess 54a.
When the movable contactor 4A is rotated about 0a, the movable contactor 4A is rotated about the opening edge of the cut groove 54, and the movable contact 3A caulked and fixed to the free end is opened / contacted with the corresponding fixed contact 2A. It is like this.

The movable contactor 4B is made of a conductive spring thin plate material. When the crossbar 40 is rotated counterclockwise in FIG. 19, the movable contactor 4B is pushed downward to bend, and from this bent state, the crossbar 40 is clocked. When the movable contact 3B is rotated in the direction, the movable contact 3B, which is caulked and fixed to the tip, is brought into contact with and separated from the fixed contact 2B by the bending and the return.

The lower end of the crossbar 40 is
The coil spring 62 compressed between the first side case 1A and the wall 63 that stands upright from the bottom of the first side case 1A pushes the coil spring 62 to urge a clockwise rotational force in FIG.

The first trip plate 41 has a shaft portion 41a, a protruding portion 41b protruding above the shaft portion 41a, and a shaft portion 41.
a side piece portion 41c having a surface orthogonal to the shaft portion 41a on the side of the second side case 1B of a, and an arm piece 41d integrally extended from one end to the upper end of the side piece portion 41c.
Both ends of the case are inserted into shaft holes 56, 56 provided on the inner side surfaces of the cases 1A, 1B, and are rotatably supported between the cases 1A, 1B. Locking portion 57 with which one end (the right end in FIG. 19) of the plate 43 is disengaged
And a receiving portion 88 that is driven by the driving portion 58a of the movable iron core 58 of the electromagnetic driving portion 47 at the upper end of the arm piece 41d.
Are formed respectively. Further, on the side surface of the second side case 1B below the side piece portion 41c, the receiving portion 5 which is pushed and moved by the facing portion 42a provided on the end surface of the lower end portion of the second trip plate 42.
9 is formed on the side surface of the receiving portion 59. The engaging portion 6 is provided on the side surface of the receiving portion 59 for engaging both ends of the torsion spring 60 for fitting the ring portion to the shaft portion 41a.
1 is provided. On the side surface of the first side case 1A below the side piece portion 41c, the first side which is opposed to the lower end of the bimetal 45 hanging from the conductive plate 71 that holds the electromagnetic drive unit 47 fixed and is pressed when the bimetal 45 is bent and displaced. A drive unit 69 is provided.

The second tripping plate 42 has a shaft hole 42b in the center.
In the first side case 1A, the shaft body 66 provided at the center of the end face of the separation wall 65, which is a partition integrally formed from the upper side of the first side case 1A to the vicinity of the bottom side, is inserted into the inner side surface of the first side case 1A. , 1B is rotatably supported, so that the electromagnetic drive unit 4 is provided on the lower end face on the opposite side of the facing unit 42a.
8 is provided with a receiving portion 68 that is pushed and driven by the driving portion 67a of the movable iron core 67. Further, on the side surface of the upper side of the second tripping plate 42 on the side of the first case 1A, the upper surface of the bimetal 46 which stands upright from the rear end of the movable contact child 4B which holds the electromagnetic drive 48 is opposed to the bimetal 46. There is provided a second drive unit 70 which is pushed when the vehicle is bent.

The conductive plate 71 made of a thin metal material is formed by being bent in an inverted L shape as shown in FIG.
The electromagnetic drive portion 47 is fixed to the outer piece 71a, and the outer piece 71a
The upper end of the bimetal 45 is reversed L on the stepped surface at the lower end of the inner piece 71b folded back in a U shape from the tip of the
The horizontal piece of the shaped portion is fixed by welding and the bimetal 45 is hung.

As shown in FIG. 13, the electromagnetic drive unit 47 includes a fixed iron core 74 having a U-shaped horizontal cross section by bending a magnetic iron plate in an inverted L shape and bending both ends of the vertical pieces at right angles, and a movable iron core 58. And a leaf spring 73 for supporting the movable iron core 58 on the magnetic pole surfaces of both ends of the fixed iron core 74 so as to swing freely, and is a flat plate 75 composed of a horizontal piece integrally formed at a right angle with the fixed iron core 74. Is inserted between the outer piece 71a and the inner piece 71b, and the cutout groove 7 at the center of both side edges of the flat plate 75 is inserted.
Inverted T hanging from 5a from the center of both side edges of the outer piece 71a
By engaging the strip-shaped pieces 76, the fixed iron core 74 is moved to the position shown in FIG.
As shown in FIG.

The movable iron core 58 is made to project to the surface on the fixed iron core 74 side, and the projections 58b, 58b are formed on the central piece 73a of the leaf spring 73.
It is swingably supported by the leaf spring 73 by inserting it into the holes 73b, 73b formed at the upper end of the plate and crimping it, and the leaf spring 73 has side pieces 73c, 73c bent and formed on both sides of the central piece 73a. Both side pieces 74a, 74 of the fixed iron core 74
Both side pieces 73c, 73 are arranged so as to follow the outer surface of a.
Locking pieces 73d, 73d protruding inward from the tip of c
Is formed in the outer corner of the fixed iron core 74.
It is fixed to the fixed iron core 74 by being locked to 4b.

The magnetic pole surfaces, which are the tips of the both side pieces 74a, 74a of the fixed iron core 74, face the movable iron core 58 via the center piece 73a of the leaf spring 73 and the both side pieces 73c, 73c.
When an excessive current such as a short-circuit current flows through the conductive plate 71, the magnetic force generated on the magnetic pole surfaces of the two side pieces 74a, 74a of the fixed iron core 74 causes the movable iron core 58 to be attracted and oscillated to move the movable iron core 58 to one side. The drive portion 58a protruding on the end face is moved.

An adjusting screw 77 is screwed into a screw hole 76 provided at the center of the flat plate 75 through the insertion hole 72 of the outer piece 71a of the conductive plate 71, and the tip of the adjusting screw 77 is a horizontal piece of the upper end inverted L-shaped portion of the bimetal 45. The inner position of the lower end of the bimetal 45 can be adjusted by bending the inner piece 71b by moving the adjusting screw 77 forward with the inner piece 71b interposed therebetween (see FIG. 17). ).

At the lower end of the vertical piece 71c of the conductive plate 71, a blade receiving spring portion 78 sandwiching a conductive bar (not shown) arranged in the distribution board is welded and fixed, and slightly above the lower end of the bimetal 45. The other end of the braided wire 79, one end of which is welded to the movable contactor 4A, is welded to the plate surface of the blade contact spring portion 78A, the conductive plate 71, the bimetal 47, the braided wire 79, and the movable contactor 4A. It is connected to the.

On the other hand, as shown in FIG. 15, the movable contactor 4B, which holds the electromagnetic drive portion 48, is folded back in a U shape with its rear end portion as an outer piece to form an inner piece 80 parallel to the rear end portion. The horizontal piece of the lower end L-shaped bent portion of the bimetal 46 is placed on the stepped surface of the upper end of the inner piece 80, and is welded and fixed to stand the bimetal 46 upright.

The electromagnetic drive unit 48 is the electromagnetic drive unit 47 described above.
Fixed iron core 74 'and leaf spring 7 formed in the same shape as
3 ', a movable iron core 67, and a flat plate 75' integrally formed with the fixed iron core 74 'are inserted between the rear end portion of the movable contact 4B and the inner piece 80, and both side edges of the flat plate 75' are inserted. By engaging the T-shaped pieces 76 'which are erected from the central portions of the both side edges of the rear end portion of the movable contactor 4B with the notch groove 75a' in the central portion of the movable contactor 4B, Figure 1 at the end
It is held as shown in FIG.

The movable iron core 58 'is made to project from the surface on the fixed iron core 74' side and has a protrusion (not shown) on the center piece 73 of the leaf spring 73.
By being inserted into holes 73b 'and 73b' formed in the upper end of a'and fixed by caulking, the leaf spring 73 'is swingably supported, and the leaf spring 73' is bent and formed on both sides of the central piece 73a '. Fixed both sides 73c 'and 73c' to the fixed iron core 74 '
The locking pieces (not shown), which are arranged along the outer surfaces of the both side pieces 74a ', 74a' and project inwardly at the tips of the both side pieces 73c ', 73c', are attached to the outside of the fixed iron core 74 '. By being fixed to the recesses 74b ′ and 74b ′ formed at the corners, they are fixed to the fixed iron core 74.

Both side pieces 74a ', 74 of the fixed iron core 74'
The magnetic pole surface at the tip of a'is the center piece 73 of the leaf spring 73 '.
a ′ and both side pieces 73c ′, 73c ′ face the movable iron core 67 through a gap, and when an excessive current such as a short-circuit current flows to the movable contactor 7B, both side pieces 7 of the fixed iron core 74 ′.
The movable iron core 6 is generated by the magnetic force generated on the magnetic pole surfaces 4a 'and 74a'.
7 is moved by suction to move the drive portion 67a projecting from one end surface of the movable iron core 67 '.

Insertion hole 8 provided at the rear end of the movable contactor 4B
The adjustment screw 77 ′ is screwed into the screw hole 76 ′ provided at the center of the flat plate 75 ′ from the lower side so that the tip of the adjustment screw 77 ′ faces the horizontal piece of the lower L-shaped portion of the bimetal 46 via the inner piece 80. The upper end position of the bimetal 46 can be adjusted by bending the inner piece 80 by moving the adjusting screw 77 forward (see FIG. 17).

On the plate surface slightly below the upper end of the bimetal 46, one end is attached to a blade receiving spring portion 81 for sandwiching a conductive bar (not shown) arranged in the distribution board in the same manner as the blade receiving spring 78 described above. The other end of the welded braided wire 82 is welded, and the blade receiving spring portion 8
1, the bimetal 46, and the movable contactor 4B are electrically connected. The blade receiving spring portion 81 is housed in a frame portion 83 made of a synthetic resin molded product.

In assembling the circuit breaker of this embodiment, first, the terminal block 10A is housed in the recess 8 of the first-side case 1A, and the release handle 17 is installed in place with the return spring 21. Further, the handle 6 is incorporated in a predetermined position together with the torsion spring 51, and the blade receiving spring portion 78 is housed in the blade receiving spring portion housing portion 90 provided near the bottom of the one end portion shown in FIG.
The vertical piece 71c is arranged along the L-shaped gap between the partition walls 91 and 92 of the first side case 1A, and the outer piece 71a is arranged parallel to the upper surface of the upper horizontal wall portion 92a of the partition wall 92. Separation wall 6 formed on the inner side surface of the first side case 1A
The electromagnetic drive unit 47 and the bimetal 45 are arranged on the left side wall surface (in FIG. 19) of FIG. At this time, the semicircular rib 103 protruding from the inner surface of the first side case 1A is fitted and positioned in the U-shaped bent portion of the outer piece 71a of the conductive plate 71 and the inner piece 71b.

Then, the movable bar 4A is fitted in the cut groove 54 of the crossbar 40, the coil spring 53 is housed in the recess 54a, and the crossbar 40 is rotatably arranged at a predetermined position of the first side case 1A. Further, the operating plate 43 is arranged so as to be connected to the handle 6 by a link 44. Further, the separation wall 65 and the partition wall 92
The electromagnetic drive portion 48 and the bimetal 46 are housed in a space between the blade receiving spring portion 81 and the frame portion 83 above the blade receiving spring portion housing portion 90 of the blade receiving spring portion 81 of the first side case 1A. It is arranged in the upper blade receiving spring storage portion 93 located at. At this time, the locking claw 83b at the lower end of the support piece 83a integrally extending from the lower portion of the frame portion 83 is provided as shown in FIG.
The frame portion 8 is locked by the locking hole 94 formed in the side case 1A.
The lower portion of the frame portion 83 is supported by a projection 97 having a semicircular cross section that supports the third portion 3 and projects toward the inner surface of the front wall of the first side case 1A.

Further, the slanted upwardly inclined portion of the central portion of the movable contactor 4B is moved toward the other end of the first-side case 1A from the lower end of the separation wall 65 located slightly above the bottom of the first-side case 1A. Is arranged between the partition wall 95 which is parallel to and extending upwardly from the parallel portion and which is extended upward and the bottom portion of the first side case 1A, and the free end side of the movable contactor 4B is mounted on the partition wall 1.
It is arranged in the space in which the fixed contact 12B is arranged via the four notches 14a. At this time, the rear ends of the movable contacts 4B are sandwiched and fixed by ribs 96 ... Protruding on the bottom surface of the parallel portion of the partition wall 95 and the bottom portion of the first side case 1A. At this time, a semi-circular rib 103 'protruding from the inner surface of the first side case 1A is fitted and positioned in the U-shaped bent portion between the rear end portion and the inner piece 80.

Further, the first trip plate 41 is attached to the torsion spring 60.
At the same time, the second tripping plate 41 is rotatably arranged at a fixed position, and the second tripping plate 41 is rotatably arranged at a fixed position.

Thus, as shown in FIG. 19, except for the intermediate case 7, the terminal block 10B housed in the recess 9 of the intermediate case 7, the release handle 17 'and the return spring 21' thereof, the first case 1A side. After being arranged and assembled, the intermediate case 7 in which the terminal block 10B, the release handle 17 'and the return spring 21' are assembled in the recess 9 is arranged so as to overlap the first side case 1A side.

When the intermediate case 7 is disposed at a fixed position on the first side case 1A side, the free end side of the movable contactor 4A is disposed in the recess 34 through the opening 39 of the vertical wall 32 and at the same time. , Fixed contactor 1 provided on the terminal block 10A
The front end side portion of 2A is placed on the step surface 31a of the bottom wall 31, and the shaft 36 is provided with the recess 3 of the release handle 17.
It will fit in 7.

On the other hand, the fixed contacts 12B provided on the terminal block 10B are placed on the ribs 26 on the bottom of the first side case 1A. Further, the lower surface of the downward step formed on the end of the intermediate case 7 is placed on the flat surface formed on the end wall of the first side case 1A.

In this state, the second side case 1B is superposed on the first side case 1A side and joined. At this time, the claw-shaped hooking locking portions 101 at the tips of the elastic locking pieces 100 at the upper and lower ends of the four portions integrally projected from the first side case 1A to the second side case 1B side are located on the second side case 1B side. The first side case 1A and the second side case 1B are coupled and fixed by being locked to the corresponding projecting hooked portions 102 (FIGS. 4, 5, and 5). (See FIG. 7, etc.). When removing the connection fixing of the first side cases 1A and 1B,
The driver 151 is inserted into the side case 1B through the release holes 150 that are opened corresponding to the hooked portions 102, and the hooked locking portions 101 of the corresponding elastic locking pieces 100 are pressed upward to receive the hooked portions. By removing the hooking state with the hooking portion 102, the second side case 1B can be removed from the first side case 1A.

By attaching the second side case 1B, the shaft 40a of the crossbar 40 and the shaft portion 41a of the first trip plate 41 are fitted in the shaft holes 52 and 56 provided on the inner surface of the second side case 1B. It is inserted rotatably.

The heads of the adjusting screws 77 and 77 'corresponding to the bimetals 45 and 46 respectively face the opening 104 opening to the upper surface of the body 1 and the opening 105 opening to the bottom, and after assembly. Of the operation adjusting screw 7 through the openings 104 and 105 so that the optimum operating point can be obtained during the operation test of
7 and 77 'are screwed to adjust the initial positions of the bimetals 45 and 46 as shown in FIG. 17 (a) to FIG. 17 (b).
After the adjustment, the upper lid 106 and the lower lid 106 ′ are fitted to the respective parts of the container 1 by utilizing the elasticity thereof to open the opening 10
4,105 is covered.

Here, the bimetals 45 and 46 are arranged side by side so that the width direction of the body 1 is the width direction and a part of the bimetal 45 overlaps in the longitudinal direction of the body 1, so that the size of the body 1 in the width direction can be made compact. ing. Further, since the displacement directions are set to the outer sides of each other, the initial positions where the bimetals 45 and 46 are not displaced are known in advance, and even when the bimetals 45 and 46 are displaced, the bimetals 45 and 46 are not closer than the initial positions. Work is easy. In other words, if they are displaced in the same direction, it is necessary to check the displacement amount before disposing them.
In the present embodiment, the work of disposing 5, 46 does not have to be troublesome.

Further, since the partition wall 65, which is a partition wall, exists between the bimetals 45 and 46, the space between the bimetals 45 and 46 can be narrowed, and the opening / closing mechanism 5 and the contact portion housed in the body 1 can be made. The installation space of is sufficiently large. Furthermore, since the braided wires 79 and 82 connected to the bimetals 45 and 46 are drawn from the vertical direction of the body 1,
This facilitates the work of routing the braided wires 79 and 82.

Thus, inside the one end of the body 1, blade receiving spring portions 78 and 81 for vertically sandwiching the conductive bar are accommodated and arranged, and the body is arranged so as to correspond to these blade receiving spring portions 78 and 81. The conductive bar insertion grooves 107 and 108 opened in a U shape are formed on one end of the body 1 on the end surface and both side surfaces of the body 1.

At the other end of the body 1, a pair of electric wire insertion holes 16A and 16B are formed in parallel with each other and opened obliquely upward.

Further, on the lower end faces of the wire insertion holes 16A, 16B, there are fixed contacts 2B arranged in the inner and lower compartments of the two compartments divided by the side walls of the cases 1A, 1B and the intermediate case 7. An exhaust hole 109 for exhausting gas generated by opening and closing the movable contact 3A and a locking hole 112 for mounting the body are opened, and the upper end of the other end of the body 1 has an upper section as shown in FIG. An exhaust hole 110 for exhausting gas generated by opening and closing the fixed contact 2A and the movable contact 3A, which are disposed in the above, is opened obliquely upward.

Since both of these exhaust holes 109 and 110 are vertically separated, and the directions facing the outside of the body 1 are at mutually different angles, the discharge directions of the arcs generated during forced opening are different from each other, and the arcs of both poles are different. It is possible to prevent a short circuit between the electrodes due to the mixture. Here, the exhaust holes 110 shown in FIG. 18 are the rising ribs 1 at the tip of the internal intermediate case 7.
13, release levers 17, ribs 11 protruding from the side surface of the lever 17
Since the exhaust gas is guided obliquely upward by the laterally projecting walls 115 facing the openings of the exhaust holes 110 of the exhaust gas holes 4, 114 and the cases 1A, 1B, it is difficult to intersect with the exhaust gas exhausted from the exhaust holes 109 below.

Then, the electric wires 111, 111 on the load side are inserted into the electric wire insertion holes 16A, 16B, respectively, and each terminal block 1
The circuit breaker of the present embodiment can be inserted in the electric path by connecting to 0A and 10B and connecting the conductive bar to each blade receiving spring portion 78. Reference numeral 112 in the drawing denotes a locking hole for fixing the body.

Next, the operation of this embodiment will be described with reference to FIGS.
Will be described.

FIG. 20 shows the off state. In this off state, the operating portion 6a of the handle 6 is exposed upside down from the opening 50, and the engagement between one end of the operating plate 43 and the first tripping plate 41 is shown. The combined state is in a disengaged state. The cross bar 40 is biased by the coil spring 62 so as to rotate clockwise in the figure, and the movable contact 4A inserted into the cut groove 54 of the cross bar 40 moves the free end upward. The movable contact 4B inserted into the cut groove 55 has its free end moved upward by its spring elastic force, and the movable contacts 3A and 3B provided at the respective free ends are It is in a state of being separated from the corresponding fixed contacts 2A and 2B.

When the operating portion 6a of the handle 6 is rotated clockwise in this state, the upper shaft 44a of the link 44 is pushed downward and the link 44 pushes down the operating plate 43 by the lower shaft 44b. By pushing down the operating plate 43, one end (the right end in the drawing) of the operating plate 43 hits the locking portion 57 of the first tripping plate 41, and the operating plate 43 rotates counterclockwise around that position as a rotation center. The other end (left end) of the operating plate 43 hits a protrusion 84 provided on the upper end of the crossbar 40 as shown in FIG. 21, and rotates the crossbar 40 counterclockwise against the spring bias.

By this rotation, the cut groove 55 of the crossbar 40 is formed.
The movable contactor 4B inserted into the flexible contact 4B is bent in the direction of moving the free end downward, and the movable contact 3B at the free end is brought into contact with the fixed contact 2B. Further, the movable contactor 4A inserted into the cut groove 54 rotates counterclockwise to bring the movable contact 3A at its free end into contact with the fixed contact 3B. This contact is delayed from the contact of the movable contact 3B with the fixed contact 2B.

Since the movable contactor 4B obtains contact pressure by its own elasticity, no spring means for contacting pressure is required, and since it is not necessary to connect the electric path by using a braided wire, parts are incorporated. No work or braided wire connection work is required, improving productivity.

When the handle 6 is further rotated clockwise, the position of the lower shaft 44b of the link 44 and the handle 6 are
The upper shaft 44b moves to the left as shown in FIG. 22 from the line connecting the center of rotation of the handle 6, and in this state, the torsion spring 51 of the handle 6 and the coil spring 62 for biasing the crossbar 44,
Further, the spring force or the like of the movable contactor 4B is balanced and the latched state between the one end of the actuating plate 43 and the locking portion 57 of the first tripping plate 41 is maintained, and the ON state of FIG. 22 is maintained. FIG. 23 shows the above ON state with the trip plates 41 and 42 removed.

When the operating portion 6a of the handle 6 is turned counterclockwise in the on state, the upper shaft 44a of the link 44 is rotated.
Is moved in the right direction beyond the line connecting the rotation center of the handle 6 and the lower shaft 44b, and moves upward, so that the left end of the operating plate 43 and the locking portion 57 of the first trip plate 41 are latched. The crossbar 40 is rotated clockwise by the biasing force of the coil spring 62, and the handle 6 is rapidly rotated back to the off side by the biasing force of the torsion spring 51. When the crossbar 40 is rotated clockwise, the movable contactor 4A is rotated clockwise to move the free end upward so that the movable contact 3A is separated from the fixed contact 2A. Further, the downward movement of the movable contactor 4B disappears, and the spring force restores the original state, so that the movable contact 3B at the free end is separated from the fixed contact 2B. This separation is delayed compared with the separation of the movable contact 3A from the fixed contact 2A. This delay is the same as in the forced opening described later.

Since the opening and closing of the contact portions of both poles are delayed as described above, the arc generated when the contacts are opened and closed is only the movable contact 4A on the rigid side, and the movable contact made of a spring material. It is possible to prevent consumption due to the 3B arc.

Further, the arcs generated at the contact points of both poles are generated in the respective arrangement sections, and since the exhaust directions of the exhaust holes 109 and 110 are different, the inter-electrode short circuit due to the arc can be prevented.

Further, the stoppers 130 ... Formed in both the cases 1A and 1B and the intermediate case 7 are inserted into the concave groove 131 formed in the width direction of the tip end surface of the crossbar 40 which rotates when the contact portion is opened. Since it abuts on the bottom of the concave groove 131, there is no risk that the arc generated in one compartment will sneak from the crossbar 40 side on the back side of the body 1 and enter the other compartment, and the arc inside the body 1 will be eliminated. Prevent short circuit between electrodes.

Further, the fixed contact 2 of the upper fixed contact 12A
The space near A is widened to the space between the side walls of both cases 1A and 1B by the bulging portion 30 of the intermediate case 7, and the space near the fixed contact 2B of the lower fixed contactor 12B is formed between both cases 1A and 1B. Since it is a wide space between the side walls,
It is possible to reduce the gas pressure due to the arc generated when the respective contact parts are separated, and it is possible to prevent cracks and breakage of both cases 1A and 1B due to the gas pressure.

Further, since the intermediate case 7 is made of a resin material containing Mg hydroxide, it is possible to oxidize the carbon generated when the contact portion is opened and prevent the insulation deterioration due to the carbon.

Now, in the ON state shown in FIG. 22,
When an overcurrent flows through the load, the bimetals 45 and 46 generate heat due to the overcurrent and are curvedly displaced. Here, the bimetal 45 hung from above is displaced so that the lower end moves leftward in the figure, and the bimetal 46 erected upright.
23 is displaced so that the upper end moves to the right, the lower end of the bimetal 45 pushes the first drive portion 69 of the first tripping plate 41 leftward, and the upper end of the bimetal 46 moves to the second pull, as shown in FIG. The second drive unit 70 of the removal plate 42 is pushed to the right.
That is, the free ends of both bimetals 45 and 46 are displaced in the direction away from each other. Due to this displacement, the first and second tripping plates 4
1, 42 rotate clockwise, but at this time, the facing portion 42a of the second tripping plate 42 pushes the receiving portion 59 of the first tripping plate 41 to apply a clockwise turning force to the first tripping plate 41. give.

Since the bimetals 45 and 46 are energized in opposite directions to each other, when a large current flows, magnetic forces are generated in the bimetals 45 and 46 in directions away from each other. Therefore, the curved displacement of the bimetals 45 and 46 can be made quick, and as a result, forced opening can be made faster. This operation is also effective during forced opening due to a short-circuit current, which will be described later.

When the first tripping plate 41 is rotated clockwise, the latched state between the locking portion 57 and one end (right end) of the operating plate 43 is released, and the operating plate 43 moves the lower shaft 44b of the link 44. It will rotate clockwise around. Therefore, the other end (left end) of the operating plate 43 causes the crossbar 40 to move.
24, the crossbar 40 is rotated clockwise by the spring force of the coil spring to return the movable contacts 4A, 4B to the off state as shown in FIG.
3B is separated from the fixed contacts 2A and 2B, respectively.

After that, the bimetals 45, 4 are cut off by disconnecting the electric circuit.
6 returns to the original state, the first tripping plate 41 is returned to the original position by the biasing force of the torsion spring 60, and at the same time, the receiving portion 59 pushes and moves the facing portion 42a of the second tripping plate 42. The second trip plate 42 is returned to its original position. Further, the handle 6 is rotated in the OFF direction (counterclockwise direction) by the bias of the torsion spring 51.

When an excessive current such as a short-circuit current flows in the ON state, magnetic force is generated in the fixed iron cores 74, 74 'of the electromagnetic drive units 47, 48, and the corresponding movable iron core 5 is moved.
8 and 67 are sucked and rocked. As a result, as shown in FIG. 25, the drive portion 58a of the movable iron core 58 pushes the receiving portion 89 of the first trip plate 41, and the drive portion 67a of the movable iron core 67 pushes the receiving portion 68 of the trip plate 42, respectively. Rotate clockwise. The same as when the overcurrent flows
When the trip plate 41 rotates clockwise, the latched state between the locking portion 57 and one end (right end) of the operating plate 43 is released,
The operating plate 43 rotates clockwise about the lower shaft 44b of the link 44. Therefore, the regulation of the crossbar 40 by the other end (left end) of the operating plate 43 is eliminated, the crossbar 40 is rotated clockwise by the spring force of the coil spring 62, and the movable contacts 4A and 4B are returned to the off state. The movable contacts 3A and 3B are separated from the fixed contacts 2A and 2B, respectively.

Thereafter, the electromagnetic circuits 47, 4 are cut off by disconnecting the electric path.
When the magnetic force is not generated in the fixed iron cores 74, 74 'of No. 8,
The movable iron cores 58 and 67 return to their original state by the spring force of the leaf springs, and the first tripping plate 41 returns to its original position by the biasing force of the torsion spring 60, and at the same time pushes the second tripping plate 44. Move it back. The handle 6 is a torsion spring 5
The urging force of 1 causes rotation in the off direction (counterclockwise direction).

Here, each fixed iron core 7 of the movable iron cores 58 and 67 is
Since the electromagnetic drive units 47 and 48 are arranged so that the directions of attraction to the magnets 4, 74 'are opposite to each other, even if vibration is applied, one of the movable iron cores 58 and 67 is attracted by the vibration. Since the other moves in the direction of anti-suction, the force for rotating the first and second tripping plates 41, 42 in the latch tripping direction is obtained only by the movement of one of the movable iron cores, and therefore the twisting First against the biasing force of the spring 60
It is not possible to obtain the force for pulling off the trip plate 41, and as a result, malfunction due to vibration can be prevented.

[0083]

The invention of claim 1 according to the present invention includes two fixed contacts which is fixed to the fixed contact, and two movable contact which is fixed a moving contact that faces the movable contact and separation to the each fixed contact, these two An opening / closing mechanism for operably holding one movable contactor, a handle for bringing the movable contacts into and out of contact with each of the fixed contacts via the opening / closing mechanism, and a handle for holding the handle so as to be operable from the outside. A circuit breaker comprising: a body having two exhaust holes for discharging gas due to an arc generated when the movable contact is separated from each of the fixed contacts; Since it is formed in upper and lower two stages in the vertical direction, the arcs of each pole are less likely to mix when the arcs generated when the movable contacts separate from the fixed contacts go out of the body. Becomes
There is an effect that a short circuit between electrodes can be prevented. Besides the above
Each exhaust hole is formed at an angle where the outer openings are separated from each other.
Therefore, if the arcs exit the vent holes, they will
It becomes easier to come out in the direction away from
There is also the effect of

[0084]

According to a second aspect of the invention, in the first aspect of the invention, the movable contacts and the fixed contacts are arranged side by side in the width direction of the body and arranged vertically in the height direction of the body. Then, a partition member for isolating each fixed contact is provided, and the movable contact and the fixed contact are separately housed in two compartments divided by both side walls in the width direction of the body and the partition member. Since the exhaust holes of the fixed contact and the fixed contact are formed above the body in one compartment, and the exhaust holes of the lower movable contact and the fixed contact are formed below the body in the other compartment, The exhaust hole is isolated by the partition member, and the arc generated when the movable contacts are forcibly opened from the fixed contacts is prevented from being mixed in the body to prevent short circuit between electrodes. There is.

According to a third aspect of the present invention, in the second aspect of the present invention, the partition member extends between the fixed contacts substantially parallel to the side wall of the container, and the device on the fixed contact side of the upper stage is provided. A vertical wall portion for accommodating the upper fixed contact together with the side wall of the body, and a bottom wall together with the side wall of the lower fixed contact side of the body extending from the lower end of the vertical wall portion substantially parallel to the bottom surface of the body. The lateral wall portion that houses the conductor connection portion of the fixed contact, and the device on the fixed contact side of the lower stage that bulges from the vicinity of the fixed contact of the fixed contact of the upper stage toward the side wall of the device on the fixed contact side of the lower stage A lateral wall portion, a bulging portion, and both side walls of the container body, the fixed contact of the lower fixed contact is laid across the both side walls of the container body. Therefore, the vicinity of the fixed contact of the upper fixed contact is expanded to the space between both side walls of the body by the bulging part. When the movable contact located in each compartment is separated from the fixed contact, the vicinity of the fixed contact of the lower fixed contact can be widened between both side walls of the body of the body. It is possible to reduce the gas pressure due to the arc generated at the time, and it is easy to prevent cracks and breakage of the vessel due to the gas pressure.

[0087] The invention of claim 4 is the invention of claim 3, wherein the closing mechanism is rotatable cross having a kerf communicating with each partition and the lateral fitting inserted individually each movable contact from both sides A bar is provided, and stoppers are provided on both side walls of the partition member and the body, with which the movable contact-side tip end surface of the crossbar abuts in a state where the movable contacts are separated from the fixed contacts. , It is possible to reduce the possibility that the arc generated when the movable contacts are separated from the fixed contacts enters the other section from the crossbar side on the inner side of the body, and to prevent the inter-electrode short circuit due to the arc. is there.

According to the invention of claim 5, in the invention of claim 4 , since the concave and convex engaging portions are provided on the tip surfaces of the stopper and the crossbar, the concave and convex engaging portions are provided on the end surfaces of the stopper and the crossbar. Since it is formed, there is no possibility that an arc generated in the upper or lower section will directly enter the lower or upper section as it is, and in addition to the effect of claim 5, short circuit between electrodes due to arc can be prevented. There is an effect.

According to a sixth aspect of the present invention, in any one of the second to fifth aspects, the partition member is formed of a material containing a hydroxide of an alkaline earth metal. There is an effect that it is possible to prevent insulation deterioration by oxidizing carbon generated when each fixed contact is separated.

[Brief description of drawings]

FIG. 1 is a front view of the present invention.

FIG. 2 is an exploded perspective view of the above.

FIG. 3 is a side view of the above.

FIG. 4 is a sectional view taken along line AA of FIG. 3 above.

5 is a sectional view taken along line BB of FIG. 3 above.

6 is a sectional view taken along line CC of FIG. 3 above.

FIG. 7 is a perspective view of the above.

FIG. 8 is a top view of the above.

FIG. 9 is a bottom view of the above.

FIG. 10 is a rear view of the above.

FIG. 11 is an enlarged perspective view of the intermediate case of the above.

FIG. 12 is an enlarged exploded perspective view in which a part of the above crossbar portion can be omitted.

FIG. 13 is an exploded perspective view of structural portions of the upper electromagnetic drive unit and the upper bimetal of the above.

FIG. 14 is a perspective view of structural portions of the upper electromagnetic drive unit and the upper bimetal of the above.

FIG. 15 is an exploded perspective view of structural portions of the lower electromagnetic drive unit and the lower bimetal of the above.

FIG. 16 is a perspective view of structural portions of the lower electromagnetic drive unit and the lower bimetal of the above.

FIG. 17 is an explanatory diagram of the adjustment of the above bimetal.

FIG. 18 is an enlarged perspective view, partly omitted and broken, for explaining the configuration of the upper exhaust hole of the above.

FIG. 19 is a side view showing a state where members are assembled to the first side case of the above.

FIG. 20 is a state explanatory diagram of an off state of the above.

FIG. 21 is a state explanatory view showing a state of transition to the ON state in the above.

FIG. 22 is a state explanatory view of the above-mentioned ON state.

FIG. 23 is an on-state explanatory view showing a state in which the trip plate is removed.

FIG. 24 is a state explanatory view of a trip operation due to an overcurrent in the above.

FIG. 25 is a state explanatory view of a momentary interruption state due to an excessive current in the above.

[Explanation of symbols]

1 body 1A First side case 1B Second side case 109,110 Exhaust hole

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor ▲ Taka ▼ Shinji Yama Inside 1048 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Works Co., Ltd. (72) Takuya Kagawa Inside 1048 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Works Co., Ltd. (72) Inventor Kenichiro Shimizu 1048, Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Works Co., Ltd. (72) Toshihiro Oido, 1048, Kadoma, Kadoma City, Osaka Prefecture (72) Takanobu Tanaka Osaka Prefecture 1048 Kadoma, Kadoma-shi, Matsushita Electric Works Co., Ltd. (72) Inventor, Hatsuo Mizuno 1048 Kadoma, Kadoma-shi, Osaka Prefecture Matsushita Electric Works, Inc. (72) Yoshiya Nakamichi 1048, Kadoma, Kadoma-shi, Osaka Matsushita Electric Works Incorporated (56) Reference JP-A-5-47291 (JP, A) JP-A-11-67046 (JP, A) (58) Fields investigated (Int.Cl. ⁷⁾ , DB name) H01H 73/06

Claims (6)

(57) [Claims] 1. Two fixed contacts having fixed contacts fixed thereto ,
Each of the fixed contacts is provided with two movable contacts fixed to the movable contacts that face each other so that the movable contacts can be separated from each other, and an opening / closing mechanism that operably holds these two movable contacts. A handle for bringing the movable contact into and out of contact with each fixed contact, and two exhaust holes for holding the handle so as to be operable from the outside and for discharging gas generated by an arc generated when the movable contact is separated from each fixed contact. in the circuit breaker and a device body formed with the exhaust hole in a height direction of the device body, it is formed on the upper and lower stages,且
First, each of the exhaust holes is shaped at an angle such that the outer openings are separated from each other.
A circuit breaker characterized by being made . 2. The movable contact and the fixed contact are provided in the body.
Side-by-side in the width direction of the
A partition member is installed below and separates the fixed contacts.
K, each movable contact and fixed contact in the width direction of the body
Divided into two compartments divided by both side walls and partition members
Stored separately, and the exhaust holes of the upper movable contact and fixed contact are
It is formed above the container in the compartment of
Exhaust holes of the moving contact and the fixed contact in the other compartment
The circuit breaker according to claim 1, wherein the circuit breaker is formed below the . 3. The partition wall member is provided between the fixed contacts in the container.
Extends almost parallel to the side wall of the body
A vertical housing for accommodating the upper fixed contact together with the side wall of the body.
Extend the wall and the bottom of this vertical wall approximately parallel to the bottom of the body.
Put it down together with the side wall of the body on the fixed contact side of the lower stage.
The side wall part that houses the conductor connection part of the fixed contact of the step, and the upper step
From the vicinity of the fixed contact of the fixed contact of the
Front of the lower fixed contact side, bulging toward the side wall of the body
A lateral wall portion and a lateral wall portion of the instrument body.
And the bulging portion and both side walls of the body to secure the lower fixed connection.
The circuit breaker according to claim 2 , wherein the fixed contact of the tentacle is housed so as to straddle both side walls of the body . 4. The opening / closing mechanism is arranged such that each of the movable contacts is on both sides.
Each of them has a cut groove that is laterally inserted and communicates with each compartment.
The partition member and the device, which include a rotatable crossbar.
On each side wall of the body, each movable contact opens from each fixed contact.
Keep the tip of the movable contact side of the crossbar in contact with
The circuit breaker according to claim 3, further comprising a stop piece that is in contact with the circuit breaker. 5. The uneven surface is formed on the tip surfaces of the stopper and the crossbar.
The circuit breaker according to claim 4, wherein an engaging portion is provided . 6. The partition wall member is a hydroxide of alkaline earth metal.
6. The circuit breaker according to claim 2 , wherein the circuit breaker is made of a material containing a compound .