JP2003178666A - Circuit breaker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a miniaturizable circuit breaker. <P>SOLUTION: A body 1 houses locking springs 13A, 13B and a quick connection terminal comprising terminal plates 11, 11 on the inside at one end in the length direction, a selecting terminal T2 and a common terminal T1 are installed at the other end in the length direction, fixed contacts 2A, 2B and moving contacts 3A, 3B opening and closing an electric circuit between the selecting terminal T2, the quick connection terminal corresponding to the common terminal T1, and an opening and closing mechanism 5 are installed on the inside, and an operation part 6a of a handle 6 is exposed from one surface in the direction perpendicularly crossing to the length direction. Two sets of electromagnetic driving parts 47, 48 are installed on the inside of the body 1 in parallel in the length direction of the body 1. <P>COPYRIGHT: (C)2003,JPO

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an overcurrent
When current flows, the movable core is sucked into the fixed core of the electromagnetic drive unit.
To release the latch and forcibly open the contacts.
About the vessel. 2. Description of the Related Art An electromagnetic tripping device for a circuit breaker of this type and
And the movable core is located away from the fixed core,
A structure that urges in the latching direction by a torsion coil spring
is there. [Patent Document 1] Japanese Patent Application Laid-Open No. 58-131626 [0004] The above-mentioned prior art is movable.
The core and the fixed core are completely separated, and
Coil arm biases the armature in the latch direction.
Therefore, the installation space for the electromagnetic trip device itself is necessary.
Problem. In addition, the movable core and the fixed core
Because it is completely separated, the suction force of the movable iron core is weak.
Problem. SUMMARY OF THE INVENTION A claim for achieving the above object
The invention of Item 1 is characterized in that a pair of wire insertion holes is formed at one end.
And the other end is open over the end face and both side faces.
And a container provided with an insertion portion, and an end provided at one end of the container.
The core wire of the electric wire inserted from the electric wire insertion hole is locked with a locking spring.
A two-pole quick-connecting terminal that is connected by pressing against a terminal plate;
It is housed inside the other end of the body and inserted from the insertion part.
Two-pole blade receiving spring for sandwiching the conductive bar,
A fixed connection interposed in the current path between the spring and the quick connection terminal
A point and a movable contact, and the movable contact is moved toward and away from the fixed contact.
Opening and closing mechanism and a window hole formed on the upper surface of the body.
With the working part facing, the movable contact is brought forward through the opening / closing mechanism.
And a handle that contacts and separates from the fixed contact
When current flows, it generates heat and displaces through the opening / closing mechanism.
2 sets for forcibly opening the movable contact from the fixed contact
Bimetal and fixed iron core with pole tips at both ends
And opposed to the pole face of the fixed iron core and
A movable iron core supported by a leaf spring on a fixed iron core;
The magnetic pole surface of the fixed iron core when a short circuit current flows in the electric circuit
The movable core is attracted by the magnetic force generated in
The movable contact is forcibly opened from the fixed contact via a closing mechanism.
And two sets of electromagnetic driving sections for poles.
The part is one end of the body together with the two sets of bimetals and
It is characterized by being arranged side by side in the direction between the other ends. FIG. 1 to FIG. 14 show the present invention.
An embodiment will be described. The circuit breaker of the present embodiment is shown in FIG.
The first side case 1A made of synthetic resin and the second side case
In a container 1 configured by overlapping and connecting
Two fixed contacts 2A and 2B arranged side by side in the width direction of the body 1
To and from these fixed contacts 2A and 2B (contact and separation)
Two movable contacts 3A and 3B fixed to each other
Moving contacts 4A, 4B and these two movable contacts 4
A and 4B for driving the steering wheel 6.
Each movable contact 3 is turned on and off via an opening / closing mechanism 5.
A, 3B are brought into contact with and separated from the fixed contacts 2A, 2B.
And each fixed contact 2A, 2B and each movable contact 4
A and 4B are arranged up and down in the height direction of the body 1
Fixed in the height direction of both movable contacts 4A and 4B
One movable contact 4B interposed between the contacts 2A and 2B,
Fixed contact where the movable contact 3A of the other movable contact 4A comes and goes.
A point 2A is connected to each movable contact 3 from each fixed contact 2A, 2B.
A and 3B intersect when viewed from the width direction of the body 1 in the separated state
It is arranged at a height position that does not. The two cases 1A and 1B are provided inside one end of the body 1.
Partition wall molded from synthetic resin material so as to be sandwiched between
A member (hereinafter referred to as an intermediate case) 7 is provided.
The recess 8 inside the side wall (outer wall) of the first case 1A and the intermediate case
Fixed contact 2A in a section defined by the vertical wall portion 35
Block 10A as a fixed-side electric circuit configuration provided with one end
And provided on the second side case 1B side of the intermediate case 7.
It is composed of the concave portion 9 and the side wall (outer wall) of the second side case 1B.
A fixed-side power supply having a lower fixed contact 2B at one end in a section
The terminal block 10B serving as a road is accommodated. Opening and closing for driving the movable contacts 4A and 4B to open and close
The mechanism 5 includes an operating plate 43 serving as a latch member and a crossbar 4.
0 and a stepped locking portion 57 for locking one end of the operation plate 43.
A first tripping plate 41 provided, a second tripping plate 42,
It consists of a handle 6, a U-shaped link 44, etc.
In addition, when the overcurrent is detected, two
Metal 45, 46, switchgear when short-circuit current flows
The electromagnetic driving units 47 and 4 shown in FIGS.
8 are added to form a common part. These electromagnetic drive units
47 and 48 are electromagnetic trip devices of the circuit breaker of the present invention.
You. As shown in FIG. 2, the electromagnetic drive unit 47 is a magnetic drive unit.
Bend the iron plate to the opposite L and fold both ends of the vertical piece at right angles
The fixed core 74 has a horizontal U-shape when bent.
Moving core 58 and movable core 58 are fixed at both ends of fixed core 74.
It is a rotatable opposing supporter on the surface and a return means at the time of rotation.
It is composed of a leaf spring 73 and is perpendicular to the fixed iron core 74.
The horizontally formed flat plate 75 is placed outside the conductive plate 71
Between the piece 71a and the inner horizontal piece 71b,
Notch groove 75a at the center of both side edges and both side edges of outer horizontal piece 71a
The inverted T-shaped piece 76 hanging down from the center of the
As a result, the fixed core 74 is fixed to the conductive plate 71 as shown in the figure.
Is done. The movable core 58 protrudes from the surface on the fixed core 74 side.
The projections 58b, 58b are attached to the central piece 73a of the leaf spring 73.
And inserted into holes 73b, 73b formed at the upper end of
By being fixed, it is rotatably supported by the leaf spring 73. Board
The spring 73 is formed by bending both sides of the central piece 73a.
The side pieces 73c, 73c are attached to both side pieces 74a, 7 of the fixed iron core 74.
4a are arranged along the outer surface of each side piece 73c, 7c.
Locking pieces 73d, 73d protruding inward from the tip of 3c
Are formed at the outer corners of the fixed iron core 74.
4b, it is fixed to the fixed iron core 74.
You. Here, the fixed iron core 74 is made up of both side pieces 74a, 74.
The end faces of the two pieces 74a, 74a are connected to the movable iron core 58.
To the free end of the movable iron core 58 from the end on the rotation center point side of
Gradually inclining toward the vertical piece as the connecting piece
Inclined surfaces 74c, 74c. Of fixed iron core 74
It consists of inclined surfaces 74c, 74c of both side pieces 74a, 74a.
The magnetic pole surface has a central piece 73a of the leaf spring 73, and both side pieces 73c,
73c, and faces the movable iron core 58 via a short-circuit current.
When an excessive current such as that shown in FIG.
Magnetic force generated on the pole faces of both side pieces 74a, 74a of the core 74
The movable iron core 58 is attracted by the
The part in contact with the end (lower edge in the figure) is the center of rotation.
And pivot it to project from the free end side end face of the movable iron core 58.
That is, the driving section 58a is moved. The insertion hole 72 of the outer horizontal piece 71a of the conductive plate 71
The adjusting screw 77 is inserted into a screw hole 78 provided at the center of the flat plate 75.
And the tip is inverted L-shaped upper end of the bimetal 45.
The adjustment screw 7 is opposed to the horizontal piece of the section via the inner horizontal piece 71b.
7 by bending the inner horizontal piece 71b by screwing it.
The initial position of the lower end of the bimetal 45 can be adjusted.
(See FIG. 4). The lower end of the vertical piece 71c of the conductive plate 71 will be described later.
The common terminal T1 is fixed by welding.
One end of the movable contact 4A is melted on the plate surface slightly above the lower end.
The other end of the braided wire 79 is welded, and the common terminal T1,
Conductive plate 71, bimetal 45, braided wire 79, movable contact
4A are electrically connected. On the other hand, a movable contact that holds the electromagnetic drive unit 48
4B is folded into a U-shape with the rear end as an outer piece as shown in FIG.
Turning back to form an inner horizontal piece 80 parallel to the rear end,
The lower end L of the bimetal 46 is placed on the step surface at the upper end of the inner horizontal piece 80.
The horizontal piece of the character-shaped folded portion is placed and fixed by welding to fix the bimetal 46.
Standing upright. As shown in FIG. 3, the electromagnetic drive unit 48
Fixed iron formed in the same shape as that of the electromagnetic drive unit 47 of FIG.
A core 74, a leaf spring 73 and a movable core 58
The flat plate 75 integrally formed with the fixed iron core 74 is
B between the rear end portion and the inner horizontal piece 80,
The rear end of the movable contact 4B is inserted into the cutout groove 75a at the center of both side edges.
T-shaped pieces 76 that are suspended from the center of both side edges of the
The fixed core 74 is moved to the rear end of the movable contact 4B.
As shown in FIG. The movable iron core 58 protrudes from the surface on the fixed iron core 74 side.
And a projection (not shown) is attached to the central piece 73a of the leaf spring 73.
Insert into the holes 73b, 73b formed in the upper end
Is fixed to the leaf spring 73 so as to be rotatable.
73 is a side piece formed by bending both sides of the central piece 73a
73c, 73c are fixed to both side pieces 74a, 74a of the fixed iron core 74.
73c, 73c
Fix the locking piece (not shown) protruding inward at the tip of the
The recesses 74b, 74b formed at the outer corners of the iron core 74
By being stopped, it is fixed to the fixed iron core 74. Ends of both side pieces 74a, 74a of the fixed iron core 74
The magnetic pole surface composed of the inclined surface 74 c is a surface inside the leaf spring 73.
Through the gap between the central piece 73a and the two pieces 73c, 73c
An excessive current such as a short-circuit current is opposed to the movable iron core 58.
When it flows to the movable contact 7B, both sides 7 of the fixed iron core 74
The movable iron core 58 is formed by the magnetic force generated on the magnetic pole surfaces of the magnetic poles 4a and 74a.
Suction and rotation as described above, the free end of the movable iron core 58
The driving portion 58a projecting from the side end face is moved.
You. Insertion hole provided at rear end of movable contact 4B
(Not shown) into a screw hole 78 provided at the center of the flat plate 75.
Screw in the adjusting screw 77 from below, and
The lower end L-shaped portion of the barrel 46 is opposed to the side piece via the inner side piece 80.
The inner piece side 80 by screwing the adjusting screw 77
Adjust upper end position of bimetal 46 by bending
(See FIG. 4). The plate surface slightly below the upper end of the bimetal 46
The selection terminal T2 in the slide member 83 described later
The other end of the braided wire 82 whose one end is welded is welded.
The selection terminal T2, the bimetal 46, and the movable contact 4B are electrically connected.
Connected to Now, inside the other end of the container 1, there are different positions.
(Up and down) three conductive bars (shown in FIG.
One common connection for connecting the bottom conductive bar
A storage section 90 for storing and arranging the terminal T1, and the remaining two conductors
One selection terminal to select one of the power bars and plug in
The child T2 has at least two positions corresponding to two conductive bars.
An inner storage section 200 is provided so as to be movable between
You. Both the common terminal T1 and the selection terminal T2 are substantially
After the tips of the two parallel pieces are close to the difference,
Consists of a blade receiving spring that expands toward the tip
Facilitates insertion of the conductive bar,
Sandwiches the conductive bar. The inner storage portion 200 has the remaining two conductive members.
The selection terminal T2 is positioned at two positions corresponding to the bars, respectively.
As the positioning means, the inner side of the first side case 1A
A substantially semicircular cross section is formed on the end wall surface of the section constituting the storage section 200.
The protrusion 97 is provided in the width direction of the first side case 1A. In the ceiling of the inner storage section 200 of the container 1,
On the wall that is in contact, the selection terminal T2 has two conductive
Table showing which of the bars corresponds to which position
As an indicating means, a through hole 20 communicating with the inside of the inner storage portion 200 is provided.
1 is provided, and the selection terminal T2 is housed through the through hole 201.
Columnar display unit 20 formed on top of slide member 83
2 is visible from the outside facing the through hole 201,
01 and not visible from the outside
The position of the selection terminal T2 can be known more.
ing. Also, the slide member 83 is removed through the through hole 201.
It is also possible to push down from the part and move it down
You. This through hole 201 is formed on the upper side wall of both cases 1A and 1B.
Formed by abutting the semicircular cutout holes 201a provided in the
Consists of a circular hole. The slide member 83 is made of a synthetic resin molded product.
Frame with both ends open corresponding to both ends of the container 1
The blade receiver which is formed in a shape and constitutes the selection terminal T2
Insert the spring from one end opening and the tip of the blade receiving spring from the other end opening
Holding the selection terminal T2 so that the
The selection terminal T2 is moved inward with the slide member 83.
It is arranged movably in the up-down direction in the storage part 200. Both sides constituting both side walls of the inner storage section 200
A sliding member 83 is provided on the inner surfaces of the side walls of the cases 1A and 1B.
Slide protrusions 203 formed on both sides can be moved up and down
The engaging vertical guide groove 204 is formed by two parallel projections.
The inner storage part 200 is formed between the
Both sides of the slide member 83 are inserted into the guide grooves 204 of the side wall.
The slide member is engaged with the slide protrusion 203 on the side.
83 and slide the selection terminal T2 up and down.
It is stored and held. The slide member 83 is on the side of the first side case 1A.
Leg piece 8 extending downward in the figure as shown in FIG.
3a is formed integrally with the lower end of the leg piece 83a.
A protruding portion 206 protruding outward is formed in the portion.
You. The projecting portion 206 is located on the side of the inner storage portion 200.
A first side casing is provided outside the side wall of the first side case 1A constituting the wall.
A guide groove formed upward from the bottom surface of the base 1A (shown in FIG.
Not communicate with the inner storage section 200 at the bottom of the upper end
Inserted into a guide groove (not shown) from the opened insertion hole 208
Into the guide groove (not shown) together with the leg piece 208.
It is slidable in the vertical direction. The protrusion 206 is located inside the inner storage portion 200.
And an operation unit for vertically moving the selection terminal T2 of the
1 Hold the projection 206 from outside or use a driver, etc.
By pushing up or down with the inner storage unit 2
00, the slide member 83 is
Moved up or down by the guide with the id groove 204
And raise the selection terminal T2 mounted on the slide member 83 upward.
It can be moved up or down. Here, the projecting portion 206 is provided with a slide groove (not shown).
Is located at the lower end of the middle conductive bar.
At the position corresponding to T2, the projecting portion 206 is
(Not shown) is located on the upper conductive bar.
The length and length of the leg piece 83a are adjusted so that T2 is at the corresponding position.
And a slide groove (not shown).
By the operation of 206, the position of the selection terminal T2 is changed to the upper conductive bar.
-Or it can correspond to the middle conductive bar
is there. The slide member 83 is moved by the above operation.
When moving, the positioning protrusion 97 is
The upper or lower end has its elasticity and
And move over the positioning surface 97 after moving.
The lower end or upper end of the frame portion 83 hits and the selected end
The position of the child T2 is held. The other end of the body 1 has a double-sided case 1
L-shaped notch grooves formed on end walls and side walls of A and 1B
Conduction with open end and side surfaces by matching
Inserting parts 209a to 209c for bar insertion
Formed to correspond to three conductive bars arranged in three stages
The upper and middle insertion parts 209a and 209b are inside.
The lowermost insertion section 209c is located in the storage section 200.
90. The common terminal T1 is connected to an electromagnetic drive unit 4 described later.
7 is mechanically and integrally connected to a conductive plate 71 which holds and holds
And the selection terminal T2 connects the braided wire 82
It is electrically connected to a bimetal 46 to be described later. Now, these common terminal T1 and selection terminal T2
Terminal block 1 electrically connected through opening / closing mechanism 5
Terminal block 10A of 0A and 10B is bent in U-shape
Terminal plate 11 and one end of a lower piece of the terminal plate 11
A piece extending upward from the upper end of the piece 11a
11a and bent at right angles to the terminal board 11
Fixed contact 12A extending in one direction and the fixed contact
Fixed contact 2A fixed to the upper surface of one end of
Is placed on the lower piece of the terminal plate 11 and stored in the terminal plate 11.
And a lock spring 13A having a substantially M-shape.
The end on the downwardly inclined bottom surface of the concave portion 8 of the first side case 1A
The lower piece of the child board 11 is placed on the rising wall 8 at one end of the recess 8.
a, the extending piece 11a is arranged along the
The fixed contact 12A is led out of the recess 8 beyond the upper end of a.
From the rising wall 8a and the bottom of the first side case 1A.
Incline between the raised partition wall 14 and the bottom of the recess 8 in the same manner.
The fixed contact is made on the fixed contact disposing portion 15 which is integrally formed by being inclined
By arranging the tip of the terminal 12A, the terminal block 1
0A is disposed in the recess 8. In the fixed contact arrangement part 15,
Below the fixed contact 2A protruding from the lower surface side of the fixed contact 12A
A concave portion 15a for releasing the end is formed. Terminal board 11
A T-shaped piece 11b is integrally extended upward from the other end of the upper piece.
And one side of the side protruding portion at the upper end of the T-shaped piece 11b.
Convex flat part whose tip is formed on the inner surface of the first side case 1A
22 is placed on the upper end surface. Also, the side surface of the side piece of the terminal plate 11
Is inserted into the holding piece 13b of the locking spring 13A.
A projection 23 for preventing rattling of the lock spring 13A is integrally formed.
It has been done. The lock spring 13A and the terminal plate 11 are connected by a conductor connection portion.
It constitutes a quick-connecting terminal and is connected to the first side case 1A.
When the intermediate case 7 is overlapped, the first side case 1A
Oblique downward groove with a semicircular cross section formed in the vertical wall at the other end
160 and the opposite wall of the intermediate case 7 as shown in FIG.
It is formed with a diagonally downward groove 160 of a similar shape formed.
Inserted from the outside through the obliquely downward wire insertion hole 16A.
The core wire of the broken electric wire (not shown) is
On the upper end of the locking piece 13a and the holding piece 13b of the spring 13A
Between the end and the end of the locking piece 13a.
The core wire is locked with respect to the punching direction and the holding piece 13b is locked.
Press the core wire against the upper piece of the terminal board 11 at the upper end face of
More electrically connected core wire and mechanically
It has become so. The release handle is used to release the wire lock.
The release handle 17 is a rotating shaft provided on the lower side surface.
18 is provided on the convex flat portion 22 on the inner surface of the first side case 1A.
Vertical wall of the intermediate case 7 rotatably supported by the shaft hole 20
A shaft 36 protruding from the wall surface of the portion 35 is provided on the other side surface at the bottom.
14 is rotatably supported in the recess 37 of FIG.
And manually operating the operation unit 17a exposed outside the body 1.
Drive projection provided at the lower end when turned counterclockwise
19 is the tip of one end of the locking piece 13a of the locking spring 13A.
Press to bend the lock piece 13a to release the lock on the core wire
You can do it. 1 in Fig. 1 is released
A return spring that constantly biases the handle 17 clockwise
is there. The terminal block 10B basically has terminals
As with the block 10A, the terminal plate 11 and the locking spring 13B
And the fixed contact 12B.
Unlike the terminal plate 11 of the terminal block 10A, the terminal block 10
B terminal plate 11 extends downward from one end of the lower piece.
1c is extended and the body 1 is extended from the tip of the extension piece 11c.
The fixed contact 12B extends in parallel with the bottom of the
And extend at a right angle from one end of the side piece of the terminal plate 11
11d is formed. The lock spring 13B is the same as the lock spring 13A.
Of a structure, placed on the lower piece of the terminal plate 11,
The protrusion 23 protruding from the side piece of the terminal plate 11 is
3b. This terminal block 10B is
Constructs the bottom of recess 9 and extends substantially parallel to the bottom of vessel 1
When the lower piece of the terminal plate 11 is placed on the
Then, the back piece 11d follows the vertical wall 25 at one end of the concave portion 9.
Between the lower end of the vertical wall 25 and one end of the horizontal wall 24
One end of the terminal plate 11 is fitted into the notch 27 formed in
The piece 11c is put out of the recess 9 so that the intermediate cable
When the contact 7 is overlaid on the first side case 1A side,
The tip of the contactor 12B, that is, the lower surface on which the fixed contact 2B is provided is
It is placed on the ribs 26 at the bottom of the first side case 1A.
It has become so. The fixed contact 2B is connected to the side wall 24 of the intermediate case 7.
And a swelling portion 30 to be described later and side walls of both cases 1A and 1B.
Between the two cases 1A and 1B in a space formed between them.
Is placed. The recess between the ribs 26, 26 is the fixed contact 12
Fixed contact of fixed contact 2B caulked and fixed to the tip of B
The lower end protruding toward the lower surface side of 12B serves as a relief. Further, information is transmitted from the other end of the upper piece of the terminal plate 11.
The tip of the lateral protrusion at the upper end of the T-piece 11b formed to extend
Above the convex flat portion 22 ′ formed on the wall surface of the intermediate case 7
It is placed on the end face. Locking spring 13B and end of terminal block 10B
Sub-plate 11 is connected to conductors as in terminal block 10A.
And the intermediate cable is connected to the second side case 1B.
When the top 7 is overlaid, the recess 9 of the intermediate case 7
An obliquely downward groove 1 having a semicircular cross section provided in a vertical wall portion at an end.
60 and the diagonally downward groove 160 as well as the second side case 1
B with the diagonally downward groove 160 provided in the vertical wall at the other end of B
When an electric wire is inserted from the formed electric wire insertion hole 16B,
Is locked with the locking piece 13a of the locking spring 13B and pressed.
Press the core wire against the upper piece of the terminal board 11 with the
To be electrically connected and mechanically locked.
ing. The release handle is used to release the wire lock.
17 ', the release handle 17' is
A rotating shaft 18 provided on the lower side surface in the same manner as the
The shaft 7 is rotatably supported in a shaft hole 20 provided in the convex flat portion 22 ′ of the screw 7.
And protrudes from the inner wall surface of the second side case 1B.
A shaft 38 is rotatably supported in a concave portion 37 formed on the side surface.
Then, the operation unit 17a exposed outside the body 1 is manually operated.
When the drive projection 19 provided on the lower end is locked when
Press the tip of one end of the lock 13a of the lock 13B to lock the lock.
13a can be bent to release the locked state
It has become. In FIG. 1, 21 'is the release handle 17'
It is a return spring that is urged to rotate clockwise. The intermediate case 7 has two cases as shown in FIG.
The second vertical wall portion 35 substantially parallel to the side walls of
Side wall inner surface of second side case 1B protruding toward side case 1B
The swelling portion 30 is formed in contact with the swelling portion.
The suspended wall is the vertical wall 25, and the second side case 1
Side wall facing B side, bottom wall 31, vertical wall 32 at one end and ceiling
The recess 34 surrounded by the well wall 33 is located on the first side case 1A side.
It is provided. Then, the intermediate case 7 is provided on the first side case 1A side.
When assembling them, attach them to the first side case 1A side.
Of the fixed contact 12A of the terminal block 10A
It is placed on the step surface 31a of the bottom wall 31 of the recess 34, and
The well wall 33 protrudes from the inner surface of the first side case 1A.
It is arranged along the lower surface of the side wall 29. On the step surface 31a
Fixed contact 2A swaged and fixed to fixed contact 12A
A groove 31b is formed to allow the lower end portion to escape. Also vertical wall 3
2 is a free end of the movable contact 4A corresponding to the fixed contact 2A.
An opening 39 is formed for inserting the
You. The handle 6 includes an operating section 6a, a rotating section 6b,
It is composed of a handle shaft 6c and both sides of the rotating portion 6b.
The handle shaft 6c protruding to the center is placed inside the first side case 1A.
Hole 49 formed in the surface and the inner surface of the second side case 1B
Into the shaft hole 49 formed in the
The operation unit 6a is held between the cases 1A and 1B,
1A and 1B are superimposed and connected
It faces a window hole 50 opening on the upper surface of the container 1.
You. A torsion spring 51 is attached to the handle shaft 6c.
The handle 6 is turned on by the torsion spring 51.
In the OFF position. At the lower end of the rotating part 6b, as shown in FIG.
The upper shaft 44a of the link 44 is freely rotatable in the girder shaft hole 52.
And is connected to the operation plate 43 through a link 44.
ing. The operating plate 43 has bearing holes 4 provided on both sides of the center.
3a through the lower shaft 44b of the link 44.
Connected to the handle 6 via the link 44, and
It is arranged to be able to move up and down. The cross bar 40 is projected from both upper side surfaces.
Shaft 40a formed on the inner surface of both cases 1A and 1B.
Insert into the holes 52, 52 and pivot between the two cases 1A, 1B.
And slightly below the shaft 40a as shown in FIG.
The side of the movable contact 4A is attached to the side of the first side case 1A.
A notch 54 to be fitted from the lateral direction and a lower second side case
On the side of the 1B side, the movable contact 4B is fitted from the side.
Grooves 55 are provided respectively. And on the movable contact side end face,
The intermediate case 7 and the inner surfaces of the side walls of both cases 1A and 1B
Each movable contact 3A, 3B is
It is engaged with the fixed contacts 2A and 2B in a state where they are separated from each other, and
A concave groove 131 contacting the portion is formed in the width direction. The movable contact 4A is a rigid conductive metal plate.
And inserted into the cut groove 54 of the crossbar 40 from the side.
As well as behind the incision 54 as shown in FIG.
In the provided concave portion 54a, the rear lower surface and the concave portion 54a
Spring 53 for contact pressure, which is arranged to be compressed between the bottom and the bottom
The rear part is biased upward by the
Movable when the subbar 40 rotates about the shaft 40a
The contact 4A rotates about the opening edge of the cut groove 54, and
The fixed contact corresponding to the movable contact 3A caulked and fixed to the end
2A is opened and contacted. The movable contact 4B is made of a conductive spring thin plate.
And the crossbar 40 is turned counterclockwise in FIG.
When rotated, it is pushed downward and bends, this bent state
When the crossbar 40 rotates clockwise from
The movable and crimped to the tip by its bending and return
The contact 3B is brought into contact with and separated from the fixed contact 2B.
It has become. The lower end of the crossbar 40 is
Between the wall 63 suspended from the bottom of the first side case 1A
As shown in FIG.
In this case, clockwise turning power is energized. The first release plate 41 has a shaft portion 41a and the shaft portion 41a.
A projecting portion 41b projecting above the shaft portion 41a;
a near the second side case 1B side of FIG.
The side piece 41c having
The arm portion 41d is integrally formed at the end of the shaft portion 41a.
Shaft holes provided on both inner surfaces of both cases 1A and 1B
56, 56 and freely rotatable between both cases 1A, 1B
The operation plate is provided on the upper end of the projection 41b.
Locking portion 57 with which one end (right end in FIG. 14) of 43 is disengaged
And an electromagnetic drive unit 47 on the upper end of the arm piece 41d.
Receiving part 88 pushed and driven by driving part 58a of moving core 58
Are formed respectively. The second side below the side piece 41c
On the side of the case 1B, the lower end of the second tripping plate 42
Receiving part 5 pushed and moved by opposed part 42a provided on the surface
9 is formed on the side surface of the receiving portion 59 on the shaft portion 41a.
Locking portion 6 for locking both ends of torsion spring 60 for fitting the ring portion
1 is provided. In addition, the first side cable below the side piece 41c
A conductive plate fixedly holding the electromagnetic driving section 47
Facing the lower end of the bimetal 45 suspended from
The first driving unit 69 pressed at the time of bending displacement of the metal 45
It is provided. The second tripping plate 42 has a central shaft hole 42b.
Above the first side case 1A on the inner surface of the first side case 1A
Separation as a partition formed integrally from the vicinity to the bottom
Insert the shaft 66 provided at the center of the end face of the wall 65
It is pivotally supported between both cases 1A and 1B,
FIG. 3 shows a lower end surface opposite to the above-described facing portion 42a.
The drive unit 58a of the movable iron core 58 of the electromagnetic drive unit 48 is pushed.
A receiving portion 68 to be moved is provided. Also the second release plate
An electromagnetic drive unit is provided on the side surface of the upper end of the first case 1A side at the upper end of 42.
48 from the rear end of the movable contact 4B holding the
Facing the upper end of bimetal 46, bending of bimetal 46
A second drive unit 70 that is pressed at the time of displacement is provided. A conductive plate 71 made of a thin metal material is shown in FIG.
It is formed by bending it into an inverted L shape
The electromagnetic drive unit 47 is fixed to the outer horizontal piece 71a of the outer horizontal piece 71a.
folded back from the tip of a in a U-shape to make it parallel to the outer horizontal piece 71a.
On the bimetal 45 on the step surface at the lower end of the inner horizontal piece 71b
The horizontal piece of the inverted L-shaped part is fixed by welding and the bimetal 45 is hung down.
Let me do it. Then, the circuit breaker of the present embodiment is assembled.
First, a terminal is inserted into the recess 8 of the first side case 1A.
While storing the block 10A, release the handle 17
It is installed together with the return spring 21 at a fixed position. The handle 6 is moved to a predetermined position.
14 and as shown in FIG.
The common terminal T1 is stored in the storage section 90 provided at the end bottom, and
The vertical piece 71c of the electric plate 71 is attached to the partition 91 of the first side case 1A,
92 along the L-shaped gap between them.
The outer horizontal piece is parallel to the upper surface of the upper horizontal wall portion 92a of the wall 92.
71a, and formed on the inner side surface of the first side case 1A.
Electromagnetically driven on the left side wall (in FIG. 14) of the separated wall 65
The part 47 and the bimetal 45 are arranged. At this time the conductive plate
In the U-shaped bent portion of the outer horizontal piece 71a of 71 and the inner horizontal piece 71b
A semicircular shape protruding from the inner surface of the first side case 1A.
The rib 103 is fitted and positioned. Then, the cross bar 40 can be moved to the cut groove 54.
The contact 4A is fitted and the coil spring 53 is recessed.
Stored in 54a and rotated to predetermined position of first side case 1A
Arrange freely. In addition, the operation plate 43 is handed with the link 44.
To be connected to the console 6. Further, in the space between the separation wall 65 and the partition wall 92,
When storing the electromagnetic drive unit 48 and the bimetal 46
Then, the selection terminal T2 together with the slide member 83 is connected to the second side housing.
Inner storage unit 2 configured when butted against base 1B
00, the inner section of the first side case 1A corresponding to
The storage position corresponds to either the upper or middle conductive bar
Position). The legs of the slide member 83
The piece 83a is inserted through the insertion hole 208 into the side of the first side case 1A.
Into a slide groove (not shown) formed on the outside of the wall
The projection 206 is exposed to the outside. Further, the central part of the movable contact 4B is directed obliquely upward.
Slightly above the bottom of the first side case 1A.
The other end of the first side case 1A from the lower end of the separation wall 65 located
Parallel to the bottom in the part direction, and tilt upward from this parallel part
The partition wall 95 extending obliquely and the bottom of the first side case 1A
Between the movable contact 4B and the free end side of the movable contact 4B.
Fixed contact 12B is arranged via the notch 14a of
Arrange in space. At this time, the lower surface of the parallel portion of the partition wall 95 and the first side
Movable contact with ribs 96 projecting from the bottom of case 1A
The rear end of the contact 4B is fixed. Also at this time
First side case 1A in the U-shaped bent portion of
A semi-circular rib 103 'protruding from the inner surface of the
Positioned. Further, the first release plate 41 is connected to the torsion spring 60.
With the second pull
The detaching plate 41 is rotatably arranged at a fixed position. In this way, as shown in FIG.
Terminal 7 and a terminal accommodated in recess 9 of intermediate case 7
Block 10B, release handle 17 'and its return spring
After placing and assembling other than 21 'on the first side case 1A side
Terminal block 10B, release handle 17 'and return
The intermediate case 7 in which the spring 21 'is assembled to the recess 9 is placed on the first side.
It is arranged so as to overlap the case 1A side. Here, the intermediate case 7 is connected to the first side case 1A side.
The fixed end of the movable contact 4A
When placed in recess 34 via opening 39 in wall 32
Both of the fixed contacts 1 provided on the terminal block 10A
The tip side of 2A is placed on the step surface 31a of the bottom wall 31
In other words, the shaft 36 is
7 will fit. [0064] Fixing provided on one terminal block 10B
The contact 12B is on the rib 26 on the bottom of the first side case 1A.
Placed on In addition, downward facing formed at the end of the intermediate case 7
The lower surface of the step portion is formed on the end wall of the first side case 1A.
It is placed on a flat surface. In this state, the second side case 1B is connected to the first side case.
In this case, they are superimposed on the side 1A and joined. At this time
The first case 1A is integrally protruded from the first case 1A to the second case 1B.
Claw at the tip of four elastic locking pieces 100 at the upper and lower ends
Of the second side case 1B side.
The first side case is locked by the
1A and the second side case 1B are connected and fixed to form the body 1.
(See FIGS. 13 to 11 and the like). This first
When removing the fixed connection of the side cases 1A and 1B,
Opened in the case 1B corresponding to each hooked part 102.
A driver 151 is inserted from each release hole 150 to correspond to it.
Presses the hooking locking portion 101 of each elastic locking piece 100.
Then, by removing the hooked state with the hooked portion 102,
It is possible to remove the second side case 1B from the first side case 1A.
Wear. By attaching the second side case 1B,
The shaft holes 52 and 56 provided on the inner surface of the two-side case 1B
The shaft 40a of the crossbar 40 and the shaft of the first release plate 41
41a is rotatably inserted. Also, the keys corresponding to the bimetals 45 and 46
As shown in FIG.
An opening 104 opening on the upper surface of the bottom, as shown in FIG.
Will face the openings 105 that open to the
Opening for optimal operating point during subsequent motion test
Adjusting screws 77, 77 'are screwed through 104, 105
And the initial positions of the bimetals 45 and 46 from FIG.
Adjustment is performed as shown in FIG.
06, the lower lid 106 'is made of each
To cover the openings 104 and 105. Here, the bimetals 45 and 46 are the width of the body 1.
The part overlaps the longitudinal direction of the body 1 with the direction being the width direction.
The width of the body 1 is reduced in size.
I'm trying. Also, set the displacement directions to the outside
The initial position at which no displacement occurs
Even if the nozzles 45 and 46 are displaced, they must be closer than the initial position.
No work is required, so the work of arranging the bimetals 45 and 46 is easy.
And That is, if they are displaced in the same direction,
It is necessary to check the amount of displacement of
In the embodiment, the arrangement work of 5, 46 becomes troublesome.
There is no such annoyance. A partition is provided between the bimetals 45 and 46.
Between the two bimetals 45 and 46 due to the presence of the separating wall 65
Can be narrowed, and the
Make sure that there is enough space for the closing mechanism 5 and contact points
I have. Hen connected to each bimetal 45, 46
Since the braided lines 79 and 82 are routed from above and below the body 1,
The routing work of the braided wires 79 and 82 is facilitated. The inner storage portion 20 inside the other end of the container 1
0 and a storage terminal 90 are provided with a selection terminal T2 and a common terminal T1.
To accommodate these terminals T1 and T2.
One end of the body 1 extends over the end face and both side faces of the body 1.
The insertion portions 209a to 209c which are opened like this are formed.
And Further, one end of the container 1 is opened obliquely upward.
A pair of wire insertion holes 16A and 16B are formed in parallel.
You. Further, below the wire insertion holes 16A, 16B
The side surfaces of both cases 1A and 1B and the intermediate case 7
Fixed in the lower section of the two sections divided by
Gas generated by opening and closing of constant contact 2B and movable contact 3A
The exhaust hole 109 for exhausting air and the locking hole 112
It is open and furthermore, it is arranged in
Of the fixed contact 2A and the movable contact 3A
Exhaust hole 11 for exhausting gas generated by closing obliquely upward
0 is open. The two exhaust holes 109 and 110 are vertically separated.
And the angle at which the directions facing the exterior of the container 1 are separated from each other.
Therefore, the arc discharge directions at the time of forced opening
In contrast, the gap between the two poles
Short circuit can be prevented. Here, the exhaust hole 110 is inside
Rib 113 of the middle case 7
Ribs 114, 114 projecting from the side surfaces of the bars 17, 17 '
And a side collision facing the opening of the exhaust hole 110 of the case 1A, 1B.
Since the exhaust gas is guided obliquely upward by the outlet wall 115,
Intersects with the exhaust gas exhausted from the lower exhaust hole 109
It is difficult. The electric wire insertion holes 16A and 16B are respectively
Insert the load-side wire into each terminal block 10A, 10B
Connect and connect the lower conductive bar to the width direction through the insertion part 209c.
To the common terminal T1 and connect the upper or middle conductive bar
Through the insertion portion 209a or 209b.
If it is inserted in the width direction, the circuit using this embodiment
A road circuit breaker can be inserted. Next, the operation of the circuit breaker using the present embodiment
Will be described with reference to FIGS. FIG. 15 shows an off state.
In the state, the operation unit 6a of the handle 6 is inverted from the opening 50.
In an exposed state, one end of the operation plate 43 and the first release
The engagement state with the plate 41 is in a disengaged state. And coil
The crossbar 40 is moved clockwise in the drawing by the spring 62.
It is urged to rotate, and the kerf of the crossbar 40 is
The movable contact 4A penetrated through 54 has its free end upward.
It is in a state where it is moved, and it is movable
The contact 4B moves its free end upward by its spring elastic force.
Movable contacts provided at each free end
3A and 3B are separated from the corresponding fixed contacts 2A and 2B
In state. In this state, the operation section 6a of the handle 6 is
When the rotation operation is performed in the direction, the upper shaft 44a of the link 44 is moved downward.
The link 44 is moved by the lower shaft 44b
The operating plate 43 is pushed down. To push down the operation plate 43
One end (right end in the figure) of the operating plate 43 is the first pull-out.
It hits the locking portion 57 of the work plate 41, and its position is defined as the rotation center.
As a result, the operation plate 43 rotates counterclockwise,
The end (left end) is the upper end of the crossbar 40 as shown in FIG.
The crossbar 40 against the projection 84 provided on the
Rotate clockwise against spring bias. The rotation causes the cutting groove 55 of the crossbar 40 to be cut.
The movable contact 4B penetrated through the free end moves the free end downward.
The movable contact 3B at the free end.
It is brought into contact with the constant contact 2B. In addition, it is possible to insert
The moving contact 4A rotates counterclockwise to move its free end.
The contact 3A is brought into contact with the fixed contact 3B. This contact is movable
Such that the contact 3B lags behind the fixed contact 2B
ing. Here, the movable contact 4B has its own elasticity.
Since contact pressure is obtained, no spring means for contact pressure is required.
Since there is no need to make electrical connections using braided wires,
Work is not required to incorporate
I'm making it up. Then, the handle 6 is further rotated clockwise.
Then, the position of the lower shaft 44b of the link 44 and the handle 6
The upper shaft 44a from the line connecting the rotation centers of
Move to the left, and in this state, twist the handle 6
, A coil spring 62 for urging the cross bar 44,
Further, the spring force and the like of the movable contact 4B are balanced and the operation plate 43
Latched state between one end and the locking portion 57 of the first release plate 41
Are maintained, and the ON state of FIG. 17 is maintained. FIG.
The ON state is shown with the trip plates 41 and 42 removed.
You. In the on state, the operating section 6a of the handle 6 is
When rotated counterclockwise, the upper shaft 44a of the link 44
Position connects the center of rotation of the handle 6 and the lower shaft 44b.
Of the operation plate 43 to move upward beyond the right
Latch state between the left end and the locking portion 57 of the first release plate 41
Is released, and the crossbar 40 is biased by the coil spring 62.
While turning clockwise, the handle 6 is
With the urging force of 51, it is quickly turned and returned to the off side. Crossbar
The movable contact 4A is clocked by the clockwise rotation of -40.
To move the free end upward to move the movable contact 3A.
It is separated from the fixed contact 2A. The movable contact 4B is lower
There is no push down in the direction, and the spring force returns to the original state
The movable contact 3B at the free end is fixed to the fixed contact.
Separated from 2B. This separation is fixed by the movable contact 3A.
It is later than opening from the contact 2A. This delay will be described later.
The same applies to forced opening. Here, as described above, the opening and closing of the contact portions of both poles
Due to the delay as described above, the
Only the movable contact 4A on the rigid body side
Of the movable contact 3B made of
You. The arcs generated at the contact points of the two poles are respectively
Exhaust generated in the installation compartment and exhausted through the exhaust holes 109 and 110
Since the directions are different, a short circuit between the poles due to the arc can be prevented. Further, a crossbar which rotates when the contact portion is opened.
The two grooves are formed in the groove 131 formed in the width direction of the front end face of the case 40.
Stop pieces 130 formed on 1A, 1B and intermediate case 7
One section to engage and abut against the bottom of the groove 131
Is the arc generated at the crossbar 40 on the back side of the body 1
Eliminate the risk of getting around and entering other compartments,
1 Prevent short circuit between poles due to an arc inside. The fixed contact 2 of the upper fixed contact 12A
The space near A is bulged by the bulging portion 30 of the intermediate case 7.
Wide space between the side walls of the bases 1A and 1B, and the lower side
The space near the fixed contact 2B of the fixed contact 12B of
Because it is a wide space between the side walls of the
Reduce the gas pressure due to the arc generated when each contact is opened.
The two cases 1A and 1B can be
Cracks and breakage can be prevented. The intermediate case 7 is made of a resin containing Mg hydroxide.
Since it is formed of a material,
Oxidize carbon to prevent insulation deterioration due to carbon.
Can be. Now, in the ON state shown in FIG.
If an overcurrent flows through the load, the bimetals 45 and 46
Heat is generated by the flow, causing a curved displacement. Up here
The lower end of the bimetal 45 hanging from the left side in the figure
The bimetal 46 is displaced to move to
Is displaced so that the upper end moves to the right, as shown in FIG.
The lower end of the bimetal 45 is
1 Push the drive unit 69 to the left, and the upper end of the bimetal 46
The second drive unit 70 of the second release plate 42 is pushed rightward.
That is, the free ends of the bimetals 45 and 46 are separated from each other.
Displace in the direction. This displacement causes the first and second tripping plates 4
1 and 42 rotate clockwise, but at this time,
The facing portion 42a of the strip 42 is a receiving portion of the first tripping plate 41.
Press 59 to apply a clockwise turning force to the first release plate 41.
give. Here, the energizing direction of the bimetals 45 and 46 is
Because the directions are opposite to each other, when a large current flows
In addition, both bimetals 45 and 46 have a magnetic field in a direction away from each other.
Force is generated. Therefore, the bending deformation of the bimetals 45 and 46 is changed.
Position can be made faster, resulting in faster forced opening.
Can be done. This operation depends on the short-circuit current described later.
It is also effective at the time of forced opening. Now, the first release plate 41 rotates clockwise.
Then, the connection between the locking portion 57 and one end (right end) of the operation plate 43 is made.
Is released, and the operation plate 43 is connected to the lower shaft of the link 44.
It will rotate clockwise around 44b. So
Therefore, the crossbar 40 is formed by the other end (left end) of the operation plate 43.
The crossbar 40 is replaced by a coil spring.
Rotate clockwise by force, and move as shown in FIG.
The contactors 4A, 4B are returned to the off state, and the movable contacts 3A,
3B is separated from the fixed contacts 2A and 2B, respectively. Thereafter, the bimetal 45, 4
6 returns to the original state, and the first release plate 41 is a torsion spring.
It returns to the original position by the bias of 60, and at the same time the second pull
The receiving portion 59 pushes and moves the receiving portion 59a of the facing portion 42a of the detaching plate 42.
To return the second tripping plate 42 to its original position. Also handle 6
It is turned off (counterclockwise) by the bias of the torsion spring 51.
Will move. In the on state, the short-circuit current
When such an excessive current flows, each of the electromagnetic drive units 47 and 48 is fixed.
Each magnetic core 58 corresponding to a magnetic force generated in the
Suction and rotate. Thereby, as shown in FIG.
The driving unit 58a of the movable iron core 58 of the electromagnetic driving unit 47 is
The receiving portion 89 of the release plate 41 is pressed, and the electromagnetic driving portion 48 is pressed.
The driving portion 58a of the movable iron core 58
Press the parts 68 to rotate them clockwise. The first trip is performed in the same manner as when an overcurrent flows.
When the plate 41 rotates clockwise, the locking portion 57 and the operating plate 4
3 is released from the latched state with one end (right end) of the operation plate 4.
3 is clockwise around the lower shaft 44b of the link 44
It will rotate. Therefore, the other end of the operation plate 43 (left
The end of the crossbar 40 is no longer restricted,
-40 rotates clockwise by the spring force of the coil spring 62
Then, the movable contacts 4A and 4B are returned to the off state,
The contacts 3A and 3B are separated from the fixed contacts 2A and 2B, respectively.
You. Thereafter, the electromagnetic drive units 47, 4
When no magnetic force is generated in each fixed iron core 74 of FIG.
The iron core 58 returns to the original state by the spring force of the leaf spring 73,
The first release plate 41 is restored to its original state by the bias of the torsion spring 60.
To the position, and simultaneously pushes and moves the second release plate 44
And put it back. The handle 6 has a torsion spring 51.
Force to rotate in the off direction (counterclockwise).
You. Here, the fixed iron core corresponding to each movable iron core 58
Electromagnetic so that the directions to be attracted by 74 are opposite to each other
Since the drive units 47 and 48 are provided, vibration is applied.
The direction in which one of the movable iron cores 58 is attracted by the vibration
In addition, since the other moves in the direction of anti-suction, the first and second pulls
Force for turning the release plates 41 and 42 in the latch release direction
Can be obtained only by the movement of one of the movable iron cores.
The first release plate against the urging force of the torsion spring 60.
The force to trip 41 cannot be obtained, resulting in an error due to vibration.
Operation can be prevented. (Embodiment 2) In the electromagnetic drive unit 47 (48) of this embodiment,
Supports the movable iron core 58 rotatably on the fixed iron core 7 and
Leaf spring 73 serving as return means and the corresponding fixed iron core 7 side
2 is different from that of the first embodiment.
As shown in FIG. 1, the leaf spring 73 is formed in a U-shape, and
And the central piece located on the lower side
Insert the projections 58b, 58b formed on the inner surface and swage
The fixing holes 73b, 73b for fixing
c and 73c are bent at right angles to the plate surface
A projection 73e is formed. Meanwhile, both sides of the fixed iron core 74
Projections 74d are integrated upward on the upper end surfaces of the pieces 74a, 74a.
Projections are formed on the inner surfaces of the protrusions 74d on both sides.
The projection 74e, which is the locked portion, is attached to the side piece 73c of the leaf spring 73.
Into the locking hole 73f, which is a locking portion formed on the protruding piece 73e.
The leaf spring 73 is firmly held by the
ing. Thus, the electromagnetic trip device of the present embodiment is configured.
One end of the leaf spring 73 of the electromagnetic drive unit 47 (48) is
22 is fixed to the free end side of the moving core 58, and the other end is shown in FIG.
To the upper part of the fixed iron core 74 near the center of rotation.
By this, the fixed core 74 and the movable core 58 are blocked.
And the center of rotation of the movable iron core 58 (the upper end in the figure).
Edge) to the side piece 74a of the fixed iron core 74 without fail.
You can do it. Therefore, even if there is vibration or impact
The rotation center of the moving core 58 is from the side piece 74a of the fixed core 74.
It is hard to come off, and the beat of the load current including harmonics is light.
This makes it easier to prevent malfunction due to inrush current. Ma
In addition, the leaf spring 73 is connected to the fixed core 74 and the movable core 5.
Compactness by arranging in the space formed by 8
I am planning. Further, one end of the leaf spring 73 is connected to a movable iron core.
Since the movable iron core 58 is fixed to the free end side of the
It can be held in a state where it is securely separated from the
It is easy to prevent malfunction due to movement or impact. The other components same as those in the first embodiment include
The same numbers are assigned and the description is omitted. (Embodiment 3) The electromagnetic drive unit 4 of this embodiment
7 (48), the movable iron core 58 is rotatable about the fixed iron core 7.
The supporting leaf spring 73 and the corresponding fixed iron core 74 side
The support structure is reversed from that of the second embodiment. So figure
23, the leaf spring 73 is formed in a U-shape,
The center of rotation of the movable iron core 58
Insert the protrusion 58b formed on the inner surface on the side and fix it by caulking
The insertion holes 73b are formed, and the ends of both side pieces 73c, 73c are formed.
At the end, a protruding piece 73e formed by bending in a direction perpendicular to the plate surface is provided.
It is provided. On the other hand, in the lower part of both side pieces 74a of the fixed iron core 74
A step surface is provided on the side surface, and a projection 74e is integrally formed on the step surface.
The locking holes 7 formed in the projecting pieces 74e on both sides of the leaf spring 73
By inserting and locking the projection 74e in the 3f,
The hook 73 is fixed. The other components same as those in Embodiment 1 include
The same numbers are assigned and the description is omitted. Thus, the electromagnetic trip device of the present embodiment is configured.
One end of the leaf spring 73 of the electromagnetic drive unit 47 (48) is
24 is fixed to the rotation center side of the moving core 58, and the other end is shown in FIG.
To the fixed core 74 on the free end side of the movable core 58
The fixed core 74 and the movable core 58
Locked and secure center of rotation of movable iron core 58
Can be brought into contact with the side pieces of the fixed iron core 74.
You. Therefore, even if there is vibration or shock, the rotation of the movable iron core 58 is performed.
The center is hard to come off the side piece 74a of the fixed core 74,
The beat of load current including waves can be reduced,
It is also easy to prevent malfunction due to flow. In addition to that, the board
A spring 73 is formed by a fixed core 74 and a movable core 58.
By arranging them in the space, compactness is achieved. Further, the movable iron core 58 sucks into the fixed iron core 74 side.
Lifting of the pivot point of the movable core 58 when pulled
To prevent load currents including harmonics.
Beating can be reduced, and malfunction of inrush current can be prevented.
It becomes easy to stop. (Embodiment 4) The electromagnetic drive unit 4 of this embodiment
7 (48), the movable iron core 58 is turned to the fixed iron core 74 side.
A leaf spring 73 to be supported is mounted on the outside.
That is, as shown in FIG. 25, the leaf spring 73 is formed in a U-shape.
And make the vicinity of the base of both side pieces 73c, 73c a right angle.
The movable core 58 is bent and
Protrusions 58b formed on both sides of the outer surface near the center of rotation,
Insertion holes 73b, 73b for inserting and caulking 58b
And the ends of both side pieces 73c, 73c are located on the rotation center side.
Projecting from the upper surface of both side pieces 74a, 74a of the fixed iron core 74.
The fixed core 7 is inserted by inserting and crimping the projection 74e.
A locking hole 73g for fixing to the upper surface of
You. Note that the same other components as those in Embodiment 1
The same numbers are assigned and the description is omitted. Thus, the electromagnetic trip device according to the present embodiment is configured.
The leaf spring 73 of the electromagnetic drive unit 47 (or 48)
2 is fixed to the rotation center side of the movable iron core 58, and the other end is
As shown in FIG. 6, the fixed core 74 on the free end side of the movable core 58
The fixed core 74 and the movable core 58
And the center of rotation of the movable iron core 58.
Can be reliably brought into contact with the side pieces of the fixed iron core 74.
It is. Therefore, even if there is vibration or impact, the movable iron core 58
Is difficult to separate from the side piece 74a of the fixed iron core 74.
To reduce beats for load currents including harmonics.
This also facilitates prevention of malfunction due to inrush current. Further, the elasticity of the leaf spring 73 can be easily obtained.
Movable iron core 58 is securely urged away from fixed iron core 7
can do. A movable iron core is provided at the center of the leaf spring 73.
Because it is fixed to the outer surface of 58, the movable iron core 58 is fixed
When attracted by the iron core 74, the movable iron core 58
Of the movable iron core 5
8 can improve the positioning accuracy of the initial position.
You. (Embodiment 5) In the electromagnetic drive unit 47 (48) of this embodiment,
Supports the movable iron core 58 rotatably on the fixed iron core 74 side.
The leaf spring 73 is mounted on the outside similarly to the fourth embodiment.
is there. That is, the leaf spring 73 used as shown in FIG.
Both side pieces 7 have a plate surface perpendicular to the plate surface of the central piece.
3c is formed by bending, and the base of both side pieces 73c is formed.
Once in the direction opposite to the tip, then fold it into a U-shape.
Return to form a substantially U-shape.
A projection 58b formed on the outer surface near the center of rotation of 58;
Insertion holes 73b, 73b for inserting and caulking 58b
And the ends of both side pieces 73c, 73c are located on the rotation center side.
On the outer surfaces of both side pieces 74a, 74a of the fixed iron core 74
The fixed projection 74e is inserted and locked to the upper surface of the fixed iron core 74.
Lock holes 73f to be held are respectively formed. Note that the same other components as those of the first embodiment include
The same numbers are assigned and the description is omitted. Thus, the electromagnetic trip device of the present embodiment is configured.
One end of the leaf spring 73 of the electromagnetic drive unit 47 (48) is
It is fixed to the rotation center side of the moving core 58, and the other end is shown in FIG.
To the fixed core 74 on the free end side of the movable core 58
The fixed core 74 and the movable core 58 are
In addition to blocking, the center of rotation of
In fact, it can be brought into contact with the side piece 74a of the fixed iron core 74.
Because Therefore, even if there is vibration or impact, the movable iron core 5
8 does not come off from the side piece 74a of the fixed iron core 74.
To reduce beats for load currents including harmonics.
This also facilitates prevention of malfunction due to inrush current. Further, the leaf spring 7 is formed by folding back in a U-shape.
3 makes the elasticity easy to take, and the movable core 58 is fixed
It is possible to surely urge in the direction away from 74. (Embodiment 6) The electromagnetic drive unit 4 of this embodiment
7 (48), the movable iron core 58 is turned to the fixed iron core 74 side.
As shown in FIG.
A part that is formed in the shape of a horizontal piece and extends from the middle to the tip
Along the outer surfaces of both side pieces 74a, 74a of the fixed iron core 74.
As shown in FIG.
c, 73c, and as shown in FIG.
In the drawing in which the piece is parallel to the axis of the rotation center of the movable iron core 58,
The outer surface of the movable core 58 along the upper edge of the movable core 58
And both sides 73c, 73c are allowed
Both end faces of the moving iron core 58 and both side pieces 74a of the fixed iron core 74,
The outer surfaces of both side pieces 74a, 74a are arranged along the outer surface of 74a.
Projection 74e projecting to a position near the center of rotation of
Insert into the locking hole 73f drilled at the tip of the side piece 73c.
And fixed to the fixed iron core 74 by locking the projection 74e.
On the other hand, between the two pieces 74a, 74a of the fixed iron core 74.
Vertically along the outer surface of the movable iron core 58
And a protrusion 58 protruding near the free end of the movable iron core 58.
b into the insertion hole 73b drilled at the tip of the vertical piece.
The movable iron core 58 is rotated by caulking the projection 58b.
It is supposed to hold it. Note that the same other components as those in the first embodiment include:
The same numbers are assigned and the description is omitted. Thus, the electromagnetic trip device of the present embodiment is configured.
The leaf spring 73 of the electromagnetic drive unit 47 (or 48)
Side is fixed to the rotation center side of the movable core 58, and the fixed core 7
4 and the movable iron core 58 are blocked.
The center of rotation of the core 58 is securely connected to the side piece 74a of the fixed iron core 74.
It can be brought into contact. Vibration and shock
The center of rotation of the movable core 58 is on the side of the fixed core 74
It is hard to come off from the piece 74a, and
Reduces beats and prevents malfunctions due to inrush current.
It will be easier. Further, the T-shaped leaf spring 73 as described above is used.
Since the elasticity of the leaf spring 73 is easy to use, the movable core
58 in a direction away from the fixed core 74.
Can be. Further, the horizontal piece is bent with respect to the fixed iron core 74 side.
Outer surface of both sides of fixed iron core 74 in insertion hole 230a at tip
By simply inserting and locking the projection 231a provided on the
3 can be fixed to the fixed iron core 74 side.
Work can be done easily. (Embodiment 7) In Embodiment 6, the leaf spring is used.
73 is a T-shape, and the bent end of the horizontal piece is fixed at the center of rotation.
It was configured to lock on the outer surfaces of both side pieces of the fixed iron core 74.
However, as a leaf spring 73 of the present embodiment, as shown in FIG.
Formed in a T-shape, and the length of the horizontal piece in both end directions
Is formed to the same length as the width of the movable iron core 58, and
The length from the end to the lower end of the central vertical piece is the height of the movable iron core 58.
And the both ends of the horizontal piece are parallel to the vertical piece.
And extend the tip of the extension piece slightly above the lower end of the vertical piece.
Extend at a right angle further outward from the position, and
Is formed by bending the portion near the right angle to form a side piece 73c.
32, near the free end of the movable iron core 58 as shown in FIG.
A projection 58b projecting from the center of the outer surface is provided at the lower part of the vertical piece.
The movable core 5 is inserted into the insertion hole 73b and caulked.
8 and the two pieces 73c, 73c are
8 so that both sides of the fixed iron cores 74, 74
74a, 74a, are arranged along the outer surface of the
The side piece 73 is attached to a projection 74e projecting from the outer surface of the
The fixed iron core 7 is inserted and locked in the locking hole 73f of FIG.
It is to be held on the 4 side. Note that the same other components as those in the first embodiment include:
The same numbers are assigned and the description is omitted. Thus, the electromagnetic trip device of the present embodiment is configured.
The leaf spring 73 of the electromagnetic drive unit 47 (or 48)
Side is fixed to the rotation center side of the movable core 58, and the fixed core 7
4 and the movable iron core 58, and
The center of rotation of the core 58 is securely contacted with the side piece of the fixed iron core 74.
It can be done. Therefore, there is no vibration or shock.
However, the center of rotation of the movable core 58 is the side piece 74 of the fixed core 74.
hardly deviate from the load current including harmonics.
And prevent malfunctions due to inrush current.
You. Further, the T-shaped leaf spring 73 as described above is used.
Since the elasticity of the leaf spring 73 is easy to use, the movable core
Forcing 58 securely in the direction away from fixed core 7
Can be. Further, the above-mentioned extension piece is
Of both sides of the fixed iron core 74 into the insertion hole 73f
Insert and lock projections 231a provided on outer surfaces of 74a, 74a
To fix the leaf spring 73 to the fixed iron core 74 side.
Mounting work can be easily performed. (Embodiment 8) This embodiment is shown in FIG.
The vertical piece including the connecting piece of the fixed iron core 74 and the vertical piece
Bent from a straight piece at a substantially right angle to the free end of the movable iron core 58
An iron plate having a horizontal flat plate 75 extending outward is provided.
On the other hand, the leaf spring 73 is located above the base and the outer edge of the base.
And two L-shaped pieces 73h extending from the inner piece.
34. The vertical piece 73i extends in the direction shown in FIG.
Movable between the vertical piece 73i and the L-shaped piece 73h
Arranged so that the rotation center side of the iron core 58 is the base side,
The movable core 5 is inserted into the locking hole 73j provided at the tip of the vertical piece 73i.
8 on the surface of the fixed core 74 and near the free end.
A certain projection 58b is inserted and locked from the inside, and L-shaped pieces on both sides are inserted.
233 are provided on both sides of the flat plate 75 made of iron plate.
Fit into the recess 74f that opens outwardly through the vertical
Place the horizontal piece 73k of the L-shaped piece 73h on a horizontal piece of iron plate.
And the inner edge of the horizontal piece 73k of both L-shaped pieces 73h, 73h
The notch 73l provided in the part is projected on a horizontal piece of iron plate.
It is fixed to the iron plate by locking to
The core 58 is rotatably held. Thus, the electromagnetic trip device of the present embodiment is configured.
The leaf spring 73 of the electromagnetic drive unit 47 (or 48)
Side is fixed to the rotation center side of the movable iron core 58, and a fixed iron
By holding the core 74 on an iron plate integrally formed,
The fixed core 74 and the movable core 58 are divided into blocks.
In addition, the center of rotation of the movable core 58 is securely
It can be brought into contact with the piece 74a. for that reason
The center of rotation of the movable iron core 58 is fixed iron even if there is vibration or impact.
The load that is hard to come off from the side piece 74a of the core 74 and contains harmonics
Able to reduce beats due to current, malfunction due to inrush current
Prevention of cropping is also easy. Also, make the length of the leaf spring 73 sufficiently long.
And elasticity can be easily obtained. According to the present invention, the return member can be made thinner.
In both cases, the gap between the movable core and the fixed core can be reduced.
The size of the electromagnetic tripping device itself can be reduced,
The circuit breaker incorporating this electromagnetic trip device.
Can be achieved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view of an entire circuit breaker according to Embodiment 1 of the present invention. FIG. 2 (a) is a perspective view of one electromagnetic drive unit of the above. FIG. 3B is an exploded perspective view of one of the electromagnetic drive units. FIG. 3A is a perspective view of the other electromagnetic drive unit of the above. (B) is an exploded perspective view of the other electromagnetic drive unit of the same. FIG. 4 is an explanatory view of adjusting the bimetal according to the first embodiment. FIG. 5 is an enlarged perspective view of the intermediate case. FIG. 6 is an enlarged exploded perspective view in which a part of the crossbar portion is omitted. FIG. 7 is a side view of the circuit breaker using the above. FIG. 8 is a rear view of the circuit breaker using the above. FIG. 9 is a perspective view of a circuit breaker using the same. FIG. 10 is a sectional view taken along the line AA in FIG. 7 of the above. FIG. 11 is a sectional view taken along the line BB of FIG. 7 of the above. FIG. 12 is a top view of the circuit breaker using the above. FIG. 13 is a bottom view of the circuit breaker using the above. FIG. 14 is a side view showing a state where members are assembled to the first side case of the above. FIG. 15 is a state explanatory view of the above-described off state. FIG. 16 is an explanatory diagram of a state during transition to the on state according to the first embodiment; FIG. 17 is a state explanatory view of the above-described ON state. FIG. 18 is an explanatory diagram showing an on-state in a state where the tripping plate is removed. FIG. 19 is a diagram illustrating a state of a trip operation due to an overcurrent according to the embodiment. FIG. 20 is a state explanatory diagram of the instantaneous interruption state due to the excessive current. FIG. 21 is an exploded perspective view of an electromagnetic drive unit according to the second embodiment of the present invention. FIG. 22 is a perspective view of the electromagnetic drive unit according to the third embodiment. FIG. 23 is an exploded perspective view of an electromagnetic drive unit according to Embodiment 3 of the present invention. FIG. 24 is a perspective view of the electromagnetic drive unit according to the third embodiment. FIG. 25 is an exploded perspective view of an electromagnetic drive unit according to Embodiment 4 of the present invention. FIG. 26 is a perspective view of the electromagnetic drive unit according to the third embodiment. FIG. 27 is an exploded perspective view of an electromagnetic drive unit according to Embodiment 5 of the present invention. FIG. 28 is a perspective view of the electromagnetic drive unit. FIG. 29 is an exploded perspective view of an electromagnetic drive unit according to Embodiment 6 of the present invention. FIG. 30 is a perspective view of the electromagnetic drive unit according to the third embodiment. FIG. 31 is an exploded perspective view of an electromagnetic drive unit according to a seventh embodiment of the present invention. FIG. 32 is a perspective view of the electromagnetic drive unit according to the third embodiment. FIG. 33 is an exploded perspective view of an electromagnetic drive unit according to Embodiment 8 of the present invention. FIG. 34 is a perspective view of the electromagnetic drive unit. [Description of Signs] 1 Body 2A, 2B Fixed contact 3A, 3B Movable contact 5 Opening / closing mechanism 6 Handle 6a Operation unit 11 Terminal plate 13A, 13B Lock spring 47, 48 Electromagnetic drive unit T1 Common terminal T2 Selection terminal

   ────────────────────────────────────────────────── ─── Continuation of front page    (72) Inventor Takehiko Okada             Matsushita Electric Works, 1048 Kadoma, Kazuma, Osaka             In the formula company (72) Inventor ▲ Taka ▼ Shinji Yama             Matsushita Electric Works, 1048 Kadoma, Kazuma, Osaka             In the formula company (72) Inventor Takuya Kagawa             Matsushita Electric Works, 1048 Kadoma, Kazuma, Osaka             In the formula company (72) Inventor Kenichiro Shimizu             Matsushita Electric Works, 1048 Kadoma, Kazuma, Osaka             In the formula company (72) Inventor Toshihiro Oido             Matsushita Electric Works, 1048 Kadoma, Kazuma, Osaka             In the formula company (72) Inventor Takanobu Tanaka             Matsushita Electric Works, 1048 Kadoma, Kazuma, Osaka             In the formula company (72) Inventor Mizuno Hatsuo             Matsushita Electric Works, 1048 Kadoma, Kazuma, Osaka             In the formula company (72) Inventor Yoshiya Nakamichi             Matsushita Electric Works, 1048 Kadoma, Kazuma, Osaka             In the formula company F term (reference) 5G030 AA05 BA01 BA06 EA01 FA01                       FA15 FC11 XX08

Claims (1)

Claims: 1. A container body having a pair of electric wire insertion holes formed at one end and an insertion portion opened at the other end so as to extend over the end face and both side faces. A two-pole quick-connecting terminal disposed at one end of the body and connected by pressing a core wire of the wire inserted from the wire insertion hole against the terminal plate with a locking spring, and housed inside the other end of the body; A two-pole blade receiving spring disposed to sandwich the conductive bar inserted from the insertion portion; a fixed contact and a movable contact interposed in a current-carrying path between the respective blade receiving springs and the quick connection terminal; A contact, an opening / closing mechanism for bringing the movable contact into and out of contact with the fixed contact, and an operation unit facing a window formed in an upper surface of the housing, and the movable contact being connected to the fixed contact via the opening / closing mechanism. A handle to be brought into contact with and separated from the handle, and when an overcurrent flows in the current path, heat is generated and displaced, and the Two sets of bimetals for forcibly opening the movable contact from the fixed contact, a fixed iron core having the ends of both side pieces as magnetic pole surfaces, and a fixed spring disposed opposite to the magnetic pole surface of the fixed iron core with a leaf spring. The movable contact is fixed via the opening / closing mechanism by the movable core which is supported by a movable core, and which is attracted by a magnetic force generated on a magnetic pole surface of the fixed core when a short-circuit current flows in the energized electric circuit. And two sets of electromagnetic drive units for forcibly opening the contacts from the contacts, wherein the two sets of electromagnetic drive units are arranged side by side with the two sets of bimetals in the direction between one end and the other end of the body. Features a circuit breaker.