JPH1167050A - Circuit breaker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a circuit breaker in which assemblage of parts is easy. SOLUTION: This circuit breaker is provided with a appliance body 1 composed of at least two cases combined with each other in which parts are installed by lateral fitting mode a drive member 3 pushed and driven along an inner surface of the body 1 by rotation action of a handle 2 pivotally installed on the base 1 to be freely rotatable, a fixed contactor 30b having a fixed contact 30a with which a movable contact 31a gets in contact when a movable contactor 31b is rotated by pressure drive of the drive member 3 by the handle 2, a latch member 4 provided between the handle 2 and the drive member 3 to be latched, keeping the drive member 3 to be driven by the handle 2 in a normal condition, a trip member 5 pivotally installed on the body 1 to be freely rotatable in the condition where it is energized in a latching direction to the latch member 4 to latch the latch member 4, and an abnormal current detection device to forcedly open the movable contact 31a from the fixed contact 30a by releasing a locked condition of the latch member 4 when an abnormal current flows.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit breaker for opening and closing contacts by a driving member driven by a turning operation of a handle.

[0002]

2. Description of the Related Art A conventional circuit breaker is shown in FIGS.

[0003] Reference numeral 100 denotes a body of a circuit breaker, which comprises a body 102 and a cover 103. Reference numeral 104 denotes a terminal device, which is fixed to the left and right sides of the body 100. The terminal plate 105 of the terminal device 104 on the left side in FIG.
At 6, it is fixed to the body 102 and has a fixed contact 107. Note that the terminal plate 10 of the terminal device 104 on the right side in FIG.
A bimetal 127 is provided upright at the front end of 8, and the upper end of the bimetal 127 is connected to the braided wire 109.

A fixing plate 110 is fixed at the center of the body 102 by screws 111. Reference numeral 112 denotes a handle, which is pivotally supported on the fixed plate 110 by pins 113. Reference numeral 114 denotes a spring attached to the handle 112, one end of which is hooked on the fixing plate 110, and the other end of which is hooked on the handle 112, and rotates the handle 112 clockwise to urge in the opening direction. .

A latch member 115 has an engagement claw 116 at one end, and is connected to one end of a handle 112 by a U-shaped link 117.
It moves up and down according to the rotation of. A pressing spring piece 118 is provided between the latch member 115 and the driving member 119.
Are arranged.

The pressing spring piece 118 is bent in a substantially U-shape, and the pressing spring piece 118 is arranged in a notch 132 formed in the center of the upper surface of the driving member 119 by cutting in an inverted T-shape. Is established.

[0007] At the lower end of the pressing spring piece 118, there is provided a lower supporting piece 118a hanging downward.
8a is fixed to the center of the front surface of the driving member 119 with a stud 131, so that the pressing spring piece 118 is attached to the driving member 119.

The driving member 119 drives the movable contact plate 121 down at both sides thereof. The lower wide portion 13 of the cutout 132 provided in the driving member 119 is provided.
2a, a pressing spring piece 118 is arranged so that the cut 13
The lower support piece 118a is fixed to the drive member 119 below the lower edge of the second support member 119 with a stud 131. Both sides of the upper portion of the pressing spring piece 118 are in contact with the step lower surface 132c reaching the upper narrow portion 132b of the cut portion 132.

The pressing spring piece 118 is formed to have a width smaller than the width of the lower wide portion 132a and wider than the width of the upper narrow portion 132b.
The lower surface 132c of the step portion extending from the upper portion to the upper narrow portion 132b functions as a stopper, so that the pressing spring piece 118 abuts on the lower surface 132c of the step portion.

The other end of the latch member 115 on the side of the engagement claw 116 passes through the upper narrow portion 132b of the cut portion 132 of the drive member 119 and abuts on the upper surface of the pressing spring piece 118. When the latch member 115 further operates in the closing direction after the contacts 107 and 120 come into contact with each other, the pressing spring piece 118 is
Is elastically deformed against the spring force, and this reaction force
07 and 120 are obtained as the contact pressure. Thereby, the movable contact 120 corresponding to the fixed contact 107 and the movable contact plate 121 having the movable contact 120 fixed at one end.
Is linked with the driving member 119.

Reference numeral 122 denotes a return spring,
Between the fixed contact 107 and the movable contact 120. The base side of the movable contact plate 121 is bent substantially in a Z-shape, and the movable contact plate 121 is inserted into the engagement insertion hole 128 of the body 102.
21 is inserted into the bent portion 121a, and the engagement insertion hole 12 is inserted.
The bent portion 121a of the base of the movable contact plate 121 is freely engageable with the engaging ceiling portion 129 of No. 8, whereby the movable contact plate 121a is freely engageable by the driving member 119. Further, when the movable contact plate 121 is pushed down by the driving member 119, the movable contact plate 121 rotates with the engagement portion between the engagement ceiling portion 129 and the bent portion 121a as a pivot point.

Reference numeral 123 denotes a tripping member, one end of which is pivotally supported by a shaft 124 and is attached to the fixed plate 100 to be displaced about the shaft 124 and a latch member 115.
An engagement piece 125 that engages with the engagement claw 116 is provided at the center. 126 is an urging spring, one end of which is fixed plate 100
, The other end is hooked on the tripping member 123,
As a result, the trip member 123 is always connected to the latch member 115.
The spring is biased in the direction of.

The bimetal 127 has one end connected to the terminal plate 108.
Is fixed to the body 102 with the screw 130 together with the tip of the braided wire 10 on the side of the upper bimetal 127.
9 is connected to the movable contact plate 121, and the overload current region of the electric circuit is bent and deformed by heat generated by an overcurrent such as a short-circuit current, so that the other end of the bimetal 127 is disconnected from the other end of the tripping member 123. Drive.

[0014]

However, in the circuit breaker having the above-described structure, a fixing plate 110 is attached to the body 102, and components such as a handle 112 and a tripping member 123 are vertically attached to the fixing plate 110. And the drive member 119 is housed between the fixed plate 110 and the body 102, so that each part is
However, there is a problem that it is difficult and troublesome to assemble it into the device.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a circuit breaker in which components can be easily incorporated.

[0016]

According to the first aspect of the present invention,
A body constituted by combining at least two cases for mounting parts as a side-fitting type, a handle partly protruding from the body and pivotally attached to the body, and a rotating operation of the handle A driving member that is pressed and driven along the inner wall of the container body, a movable contact that is rotated by the driving drive of the driving member by the handle, and a movable contact that is movable when the movable contact is rotated. A fixed contact having a fixed contact with which a contact comes into contact, a latch member interposed between the handle and the drive member, the latch member being latched so that the drive member can be driven by the handle in a normal state, and the latch member being latched A tripping member rotatably pivotally attached to the body in a state of being urged in a direction to latch the latch member, and driving the tripping member when an abnormal current flows. And is characterized in by comprising a abnormal current detection device for opening force said movable contact from the fixed contact to release the locked state of more said latch member.

According to a second aspect of the present invention, in the circuit breaker of the first aspect, the latch member is connected to the handle via a link, and the latch member is latched at one end of the latch member by the tripping member. A latch portion is provided, and a pressing portion for pressing and driving the driving member is provided on the other end side, and the latch member and the driving member are separated.

According to a third aspect of the present invention, there is provided the circuit breaker according to the first or second aspect, wherein the body is disposed between both side cases in which components are mounted as a horizontal fitting type, and between the two side cases. The movable contact and the fixed contact are respectively disposed for each pole between the intermediate case and the two-sided case, and the driving member and the pulling member are provided on the intermediate case. It is characterized in that a hole for disposing the detaching member straddling each pole is provided.

According to a fourth aspect of the present invention, in the circuit breaker according to the third aspect, a through portion penetrating between the respective side cases is provided on a bottom side of the intermediate case, and unbalance of each pole is provided in the through portion. A storage portion for a zero-phase current transformer for detecting a current is provided.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a circuit breaker according to a first embodiment of the present invention will be described in detail with reference to FIGS. A circuit breaker according to a second embodiment of the present invention will be described in detail with reference to FIGS.

[First Embodiment] FIG. 1 is a side view showing a state in which a breaking element of a circuit breaker is opened. FIG. 2 is a side view showing a state in which a breaking element of the circuit breaker is closed. FIG. 3 is an overall exploded perspective view of the circuit breaker. FIG. 4 is an exploded perspective view showing opposing surfaces of the first side case and the intermediate case. FIG. 5 is an external perspective view of the circuit breaker.
FIG. 6 is an exploded perspective view showing the relationship between the driving member and the movable contact. FIG. 7 is a side view showing a state where the zero-phase current transformer is attached to the first side case. FIG. 8 is a side view showing a state where the intermediate case is attached to the first side case. FIG. 9 is a side view showing an overcurrent trip state of the circuit breaker. FIG. 10 is a side view showing a short-circuit trip state of the circuit breaker. FIG. 11 is a side view showing a ground leakage trip state of the circuit breaker.

This circuit breaker has a housing 1, a handle 2,
It has a driving member 3, a latch member 4, and a tripping member 5, and the driving member 3 is pivotally mounted on the side of the body 1 so as to be rotatable with respect to the body 1.

The body 1 has a pair of side cases 6, 7 and an intermediate case 8 between the pair of side cases 6, 7, and a contact portion 9 between the intermediate case 8 and the side cases 6, 7 respectively. ,
10 is accommodated, and means 11 for opening and closing the contact portions 9 and 10 is accommodated between the side cases 6 and 7. these,
Contact portions 9 and 10 and means 11 for opening and closing contact portions 9 and 10
Is mounted from the side of the body 1.

The side cases 6, 7 are provided with contact portions 6a, 7a for directly contacting each other. The contact portion 6a is formed so as to extend the width of the intermediate case 8 and to contact the contact portion 7a.

The contact portions 6a, 7a and the contact portions 6a
An accommodating space 12a for accommodating the zero-phase current transformer 12 is formed between the end of the intermediate case 8 facing the a and 7a.

The zero-phase current transformer 12 detects an unbalanced current in an electric circuit that is opened and closed by the contacts 9 and 10. An amplifier that outputs an output signal when the unbalanced current detected by the zero-phase current transformer 12 exceeds the sensitivity current, and a thyristor or a transistor that is turned on when the output signal of the amplifier is output. A leakage detection circuit 13 composed of elements is provided in parallel with the zero-phase current transformer 12 and is electrically connected.

The electromagnet device 14 has a plunger 14a that operates by the output of the leakage detection circuit 13. The electromagnet device 14 includes a storage space 12 formed adjacent to the handle 2 by the first side case 6 and the intermediate case 8.
a from the side. Plunger 14a
For example, it protrudes in the direction toward the handlebar 2 and on the opposite side thereof, and operates in the direction approaching the handlebar 2 when an exciting current flows from the amplifier of the coil of the electromagnet device 14 and is excited.

The intermediate case 8 of the body 1 is made up of the first side case 6
, And the second side case 7 is stacked on the first side case 6 via the intermediate case 8.

The first side case 6 has a substantially cylindrical pivot hole 15a for pivotally supporting the handle 2 at a position substantially above the center. The intermediate case 8 has a fitting hole 15b fitted around the pivot hole 15a.

The first side case 6 has mounting recesses 16 formed at both ends on the mounting surface side which also serve as the contact portions 6a, and the terminal portion is fitted in a position above the mounting recess 16 from the lateral direction of the body 1.

The driving member 3 that supports the first fixed-side electric circuit configuration 17, the first movable-side electric circuit configuration 18, and the first movable contact 18 b of the first movable-side electric circuit configuration 18, which constitute the contact portion 9, is provided. Also, the first side case 6 is incorporated from one surface side.

The first fixed-side electric circuit configuration 17 includes a first fixed contact 17b having a first fixed contact 17a and a first connection terminal structure provided at an end of the first fixed contact 17b. And is incorporated in the positioning support 19 of the first side case 6. 17d is a first release lever having a quick connection terminal structure.

The first movable-side electric circuit configuration 18 includes a first movable contact 18b using a leaf spring having a first movable contact 18a that comes into contact with and separates from the first movable contact 17a, and a first movable contact 18b. A first braided wire 18c connected to the child 18b, a first bimetal 18d connected to the first braided wire 18c,
It comprises a first magnetic plate 18e for detecting a short circuit surrounding the first bimetal 18d, and a screw-type first terminal 18f connected to this end. 18g is a first bimetal adjustment screw.

The input / output terminals 17c and 18f are provided at mutually separated ends of the first fixed-side circuit configuration 17 and the first movable-side circuit configuration 18, and include the first side case 6, the intermediate case 8 and the second side. It is arranged so as to be exposed from the case 7.

The intermediate case 8 is overlapped on one surface side of the first side case 6 to insulate the first fixed-side electric circuit configuration 17 and the first movable-side electric circuit configuration 18 from the adjacent other pole.
Further, the intermediate case 8 also plays a role of positioning and pressing the electric circuit configuration and other necessary parts with respect to the first side case 6.

Reference numerals 22 and 23 denote a handle 2 and a driving member 3 respectively.
Is a hole portion that becomes a movable area when it is movable.

In order to form a storage space 12a for the zero-phase current transformer 12 between the lower end of the intermediate case 8 and the contact portion 6a, the height of the intermediate case 8 should be higher than the height of the first side case 6. Shortening.

A contact portion 10 is provided on one side of the intermediate case 8.
The second movable-side electric circuit configuration 31 having the second fixed-side electric circuit configuration 30 and the second movable contact 31b to be incorporated in the driving member 3 is incorporated and supported from the lateral direction of the body 1.

The second fixed-side electric circuit configuration 30 and the second movable-side electric circuit configuration 31 are provided with input / output terminals 30c exposed from the first side case 6, the intermediate case 8, and the second side case 7 at ends separated from each other. , 31f.

The second fixed-side electric circuit configuration 30 includes a second fixed contact 30b having a second fixed contact 30a and a terminal 30c having a quick connection terminal structure having a second release lever 30d. It is incorporated in the positioning support 32 of the case 8.

The second movable-side electric circuit configuration 31 includes a second movable contact 31b having a second movable contact 31a, a second braided wire 31c connected to the second movable contact 31b,
Second bimetal 31 connected to second braided wire 31c
d and a second short-circuit detection
, And a second terminal 31f connected to the second bimetal 32d.
f is assembled at a predetermined position of the intermediate case 8, and the second movable contact 31 b is held by the driving member 3. 33 is a second bimetal adjustment screw, and 34 is a handle return spring.

In this way, the body 1 is fixed to the fixed contact 17.
a and 30a provided with fixed contacts 17b and 30b and a movable contact 18 which is opposed to the fixed contacts 17a and 30a so as to be able to freely contact and separate therefrom.
The movable contacts 18b and 31b provided with a and 31a are housed therein.

The movable contacts 18b, 31 of the contact portions 9, 10
The means 11 for opening and closing b includes a handle 2 partially protruding from the body 1 and rotatably connected to the inside of the body 1, a movable contact 18a rotatably connected to the body 1, and a movable contact 18a. The movable contact 1 is moved in a direction in which
8b, 31b and the movable contact 18
An opening spring 35 for urging the driving member 3 in a direction in which the a and 31a are separated from the fixed contacts 17a and 30a, and a tripping member 5 that trips when an abnormal current such as an overcurrent or a short-circuit current is detected. And interlocking with the handle 2,
The movable contacts 18a, 31 are locked in the tripping member 5.
When the driving member 3 is pressed against the opening spring 35 in a state in which the contact member a contacts the fixed contacts 17a and 30a, the engagement with the tripping member 5 is released by the tripping operation of the tripping member 5. And a latch member 4 for releasing the driving member 3.

The handle 2, the driving member 3, and the tripping member 5 pass through the intermediate case 8 and are pivotally connected between the side cases 6, 7 so as to be freely driven.

The driving member 3 has a shaft portion 36 that is rotatably connected between the first side case 6 and the second side case 7. Further, on the outer surface of the shaft portion 36 in the axial direction, an intermediate portion of the first movable contact 18b is inserted between the first concave portion 43 and the second movable contact 31b in the lateral direction from the first case 2 side. A second concave portion 44 into which the portion is inserted in the lateral direction from the second side case 7 side is provided in a groove shape.

The shaft 36 of the driving member 3 is
And is supported by a cylindrical shaft hole 45 provided in the second side case 7. Also, a concave portion 44 provided in the driving member 3,
A contact pressure spring 46 for pressing and fixing the movable contacts 18b and 31b and for applying a contact pressure in a state where the driving member 3 rotates and the movable contacts 18a and 31a contact the fixed contacts 17a and 30a is disposed at 45. Has been established.

Therefore, for example, when the second movable contact 31a is separated from the second fixed contact 30a, the second movable contact 31b is moved by the restoring force of the contact pressure spring 46 into the second recess 44. Although it is pressed against the upper surface, the driving member 3 rotates and the second movable contact 31a becomes the second fixed contact 3
0a, the second movable contact 31b is pressed by the end 3a on the second movable contact 31a side of the drive member 3 with the rotation of the drive member 3, and the contact pressure spring 46 is compressed. As a reaction, the second movable contact 31a is changed to the second fixed contact 30.
a is applied with a contact pressure.

The movable contacts 18b and 31b have projections 4 on both sides.
7 and the concave portion 48 that fits loosely into the protrusion 47
The concave portions 44 and 45 are formed on the facing surface of the container 1 facing the concave portions 44 and 45. The movable contact 18
b, 31b are provided with a projection 49 for fitting one end of the contact pressure spring 46, and the second recess 44 has a concave shape inclined toward the projection 49 at a position farther from the second movable contact 31a than the projection 49. A receiving seat 50 for supporting the other end of the contact pressure spring 46 is provided.

The opening spring 35 for urging the driving member 3 in the direction in which the movable contacts 18b and 31b open is connected to the direction connecting the input / output terminals 17c and 18g between the first side case 6 and the driving member 3. They are arranged substantially in parallel from the lateral direction of the body 1.
That is, the opening spring 35 is a coil spring that is a tension spring, and both ends thereof are provided on the projection 51 provided on the driving member 3 and the first side case 6 so that the axial direction thereof is oriented in the longitudinal direction of the body 1. On the projection 52.

The handle 2 is connected to the first side case 6 via a link 55 and is connected to the handle 2 via a link 55.
Member 4 that presses, and latch portion 4 of latch member 4
A common part including a tripping member 5 for detecting an abnormal current that locks b is incorporated and supported through the holes 22 and 23 of the intermediate case 8.

The handle 2 has a handle shaft 2a substantially in the center.
And the handle shaft 2a is connected to the pivot hole 15 of the first side case 6.
a and the cylindrical side support hole 15 c of the second side case 7. The handle 2 has a handle portion 2b and a link connecting portion 2c on opposite sides of the handle shaft 2a.
Is provided.

The link 55 has, for example, a U-shape. One end of the link 55 is fitted into the link connecting portion 2c, and the other end is fitted and connected to the shaft hole 4a provided in the intermediate portion of the latch member 4.

The tripping member 5 locks the latch portion 4b at the other end of the latch member 4 in a normal state, and releases the latching of the latch member 4 when an abnormal current is detected. , 10 are forcibly opened.

The tripping member 5 has a shaft 5a, a bimetal receiving portion 5b, and a latching portion 5c. The tripping member 5 passes through the hole 22 of the intermediate case 8 together with the driving member 3 to the first side case 6 and the second side case 7. The shaft 5 is inserted into a pair of formed cylindrical shaft holes 56.
a is pivotally supported. In addition, a magnetic plate 57a facing the second magnetic plate 18e surrounding the first bimetal 18d and a magnetic plate 57b facing the second magnetic plate 31e surrounding the second bimetal 31d are provided.

The latch member 4 is locked at one end by a latch portion 4b to a latch locking portion 5c of the tripping member 5, and the other end of the pressing portion 4c presses and rotates the projection 3b of the driving member 3. Is what you do.

The second side case 7 is overlapped on one surface side of the first side case 6 via the intermediate case 8, and the first side and the second
It conceals the common parts and the like on the side, and plays the role of positioning and pressing the common parts and the like.

The connecting tool 58 using rivets, screws, etc.
The first side case 6 and the second side case 7 are connected to each other so as to penetrate the intermediate case 8 by passing through the four holes 59 on the side surface of the container 1, or the holes 59 provided in the intermediate case 8 are screwed. It is formed in a cylindrical shape with a hole and connects between the first side cases 6. However, the screw hole may be formed by tapping with a screw. In order to directly connect the first side case 6 and the second side case 7 with the contact portions 6a and 7a, holes 60 are formed at two places and connected by a connecting tool 61 similar to the connecting tool 58.

The operation of the circuit breaker will be described.
FIG. 1 shows an off state, in which the movable contacts 18 b and 31 b are opened by an opening spring 35.

FIG. 2 shows the ON state. When the handle 2 is operated, the latch member 4 is pushed via the link 55, and one end of the latch member 4 is locked to the latch locking portion 5 c of the release member 5. The driving member 3 is rotated at the other end, and the opening spring 3
5, the movable contacts 18b and 31b are closed.

The handle 2 is locked to the edge of the hole 22 beyond the dead center. As a result, the input / output terminals 17c, 18f
And between 30c and 31f, and a current flows.

FIG. 9 shows a case where an overcurrent flows. For example, the second bimetal 31d is bent by self-heating and pushes the bimetal receiving portion 5b of the tripping member 5, and the tripping member 5 rotates. As a result, the latch of the latch member 4 is released, so that the drive member 3 is rotated by the return force of the opening spring 35, and the movable contact 31b is opened.

The driving member 3 pushes up the pressing portion 4 c of the latch member 4, and the latch member 4 engages with the positioning portion 62 provided on any of the first side case 6, the intermediate case 8 and the second side case 7. The handle 2 is in the neutral position.

When the second bimetal 31d has returned and the accident has been recovered, the handle 2 is turned off, so that the latch member 4 is pulled up by the link 55 and locked to the trip member 5.

FIG. 10 shows a case where a short-circuit current flows in the electric circuit. The tripping member 5 is rotated by the attraction force of the magnetic flux flowing through the second magnetic plates 31e and 57b, and the latch member 4 is tripped. The movable contact 31b is thus opened.

FIG. 11 shows a case where a leakage occurs. If there is a leakage, a detection output due to the unbalanced current appears in the zero-phase current transformer 12, is amplified by the leakage detection circuit 13, and an electromagnet driving current is output. Thereby, when the electromagnet device 14 operates and the plunger 14a protrudes, the interlocking member 14b moves, the tripping member 5 is tripped, and the movable contact 18b, 3
1b opens.

The above operation is the same for the first movable-side electric circuit configuration 18.

According to this embodiment, a circuit breaker is constituted by fitting many of the members such as the handle 2, the driving member 3, the latch member 4, and the tripping member 5 sideways from the overlapping direction of the second side case 7. Therefore, it is possible to easily incorporate components and to obtain an excellent productivity.

Further, since the driving member 3 and the latch member 4 are separated from each other, the driving member 3 and the latch member 4 can be separately mounted, and the assembling workability when assembling into the body 1 is improved. It has the effect of doing.

The input / output terminals 17c, 18f and 3 are connected to the first side case and the second side case through the intermediate case 8, respectively.
Since the driving member 3 and the tripping member 5 can be communicated from the case on one side to the case on the other side, the input / output terminals 17c, 18c are provided by the intermediate case 8.
It is possible to provide insulation between the electrodes f, 30c, and 31f, and to use a multi-pole type.

Further, the height of the intermediate case 8 is made shorter than the height of the first side case 6, and the storage space 12a of the zero-phase current transformer 12 is provided between the lower end of the intermediate case 8 and the contact portion 6a. , The braided wire 18 from each pole to the zero-phase current transformer 12
There is an effect that c and 31c can be easily inserted, and the storability is improved.

[Second Embodiment] FIG. 12 is a side view showing a state in which a breaking element of a circuit breaker is opened. FIG.
FIG. 4 is a side view showing a state in which a breaking element of the circuit breaker is closed. FIG. 14 is an overall exploded perspective view of the circuit breaker. FIG. 15 is a side view showing an overcurrent trip state of the circuit breaker.

In this circuit breaker, a handle 65, a driving member 66, a latch member 67, a tripping member 6
8 and these members are attached from the side of the body 64.

The container body 64 includes a pair of side cases 69, 70 and an intermediate case 71 between the pair of side cases 69, 70.
Means 74 for accommodating the contact portions 72 and 73 between the intermediate case 71 and the side cases 69 and 70, respectively, and for opening and closing the contact portions 72 and 73 between the side cases 69 and 70.
Is stored. The contact portions 72, 73 and the means 74 for opening and closing the contact portions 72, 73 are attached from the side of the body 64.

The intermediate case 71 of the body 64 is overlapped on one side of the first side case 69, and the second side case 70 is overlapped on the first side case 69 via the intermediate case 71.

Near the center of one end of the intermediate case 71, a terminal housing 76 for housing the terminal 75 is provided.
The terminal part 75 is fitted into the terminal storage part 76 from the side of the body 64.

On the other hand, the intermediate case 71 has a substantially cylindrical pivot hole 77 for pivotally supporting the handle 65 at a substantially upper central position. In addition, the second side case 70 is connected to the handle 6 on the other side.
5 is provided with a pivotal support hole 78 for pivotal support.

The contact portion 72 from one side of the first side case 69
The driving member 66 that supports the first fixed-side electric circuit configuration 79, the first movable-side electric circuit configuration 80, and the first movable contact 80b of the first movable-side electric circuit configuration 80 also forms the housing 6.
4 from the side.

The first fixed-side electric circuit configuration 79 includes a first fixed contact 79b having a first fixed contact 79a and a first fixed contact structure 79 provided at an end of the first fixed contact 79b. , And is incorporated into one end of the first side case 69 from the lateral direction. 79d is the release lever.

The first movable-side electric circuit configuration 80 includes a first movable contact 80b using a leaf spring having a movable contact 80a that comes in contact with and separates from the first fixed contact 79a, and a first movable contact 8
0b, a first braided wire 80d connected to the first bimetallic 80c, and a terminal portion 80e connected to one end of the first braided wire 80d. 64 are fitted at predetermined positions from the lateral direction.

The intermediate case 71 is overlapped on one surface side of the first side case 69 to insulate the first fixed-side electric circuit configuration 79 and the first movable-side electric circuit configuration 80 from other adjacent poles. The intermediate case 71 also plays a role of positioning and pressing the electric circuit configuration and other necessary components with respect to the first side case 69. 81a and 81b are holes that are movable areas when the handle 65 and the driving member 66 are movable.

On one surface side of the intermediate case 71, a contact portion 7
2 and the driving member 6
A second movable-side electric circuit configuration 83 having a second movable contact 83 b to be incorporated in 6 is incorporated and supported from the side of the body 64.

The second fixed-side electric circuit configuration 82 includes a second fixed contact 82b having a second fixed contact 82a and a second terminal 82c having a quick connection terminal structure having a release lever 82d. It is incorporated into the case 71 from the side of the body 64.

The second movable-side electric circuit configuration 83 includes a second movable contact 83b having a second movable contact 83a, and a second bimetal 83c connected to the second movable contact 83b.
A second braided wire 83d connected to the second bimetal 83c, and a second braided wire 83d connected to one end of the second braided wire 83d.
And is fitted in a predetermined position from the lateral direction of the body 64. 84 is a handle return spring.

Thus, the body 64 is fixed to the fixed contact 79.
a, 82a and fixed contacts 79b, 82b and a movable contact 80 opposed to the fixed contacts 79a, 82a so as to be able to freely contact and separate therefrom.
The movable contacts 80b and 83b provided with a and 83a are housed therein.

The movable contacts 80b, 8 of the contact portions 72, 73
The means 74 for opening and closing 3b includes a handle 65 which partially projects from the body 64 and is rotatably connected to the body 64, and a movable contact 80 which is rotatably connected to the body 64 and is rotatable.
a, a driving member 66 for driving the movable contacts 80b, 83b in a direction in which the a and 83a come into contact with and separate from the fixed contacts 79a, 82a;
An opening spring 8 for urging the driving member 66 in a direction in which the movable contacts 80a and 83a are separated from the fixed contacts 79a and 82a.
5, a tripping member 68 that trips when an abnormal current such as an overcurrent is detected, and a movable contact 80a, 83a that is interlocked with the handle 65 and is engaged with the tripping member 68. The driving member 66 is pressed against the opening spring 85 in a state of being in contact with the fixed contacts 79a and 82a, and the locking of the tripping member 68 is released by the tripping operation of the tripping member 68. And a latch member 67 that releases the latch 66.

The driving member 66 is mounted between the first side case 69 and the second side case 70 so as to be vertically movable. The driving member 66 is provided with a groove 66a for restricting the lateral movement, and the groove 66a is arranged to be inserted into a thin groove receiver provided in the intermediate case 71. On both side surfaces of the driving member 66, a first concave portion 66b for inserting the intermediate portion of the first movable contact 80b in the lateral direction from the first case 2 side and an intermediate portion of the second movable contact 83b are provided. The second side which is inserted laterally from the second side case 70 side
The concave portion 66c is provided so as to open in a groove shape.

Further, a lower portion of the driving member 66 has a spring fixing hole 66d into which an opening spring 85 for urging the driving member 66 upward is inserted. When pressed down, the movable contact 80a,
The contact pressure is applied in a state where the contact 83a is in contact with the fixed contacts 79a and 82a.

Therefore, in the open state, the movable contact 80
When the driving member 66 moves downward and the movable contacts 80a and 83a contact the fixed contacts 79a and 82a, the opening springs b and 83b are pushed upward. 85 is compressed, and as a reaction, the movable contacts 80a, 83a are fixed contacts 79a, 8
A contact pressure is applied to 2a.

The opening spring 85 for urging the driving member 66 in the direction in which the movable contacts 80b and 83b open is provided below the driving member 66 so that an urging force is generated between the intermediate case 71 and the driving member 66. It is disposed in a fixing hole 66d which is open to the outside.

The intermediate case 71 has a handle 65, a latch member 67 connected to the handle 65 via a link 86 to press the drive member 66, and an abnormal current detection for locking the latch portion 67 b of the latch member 67. And a common part including a tripping member 68 are incorporated from the side.

The handle 65 has a handle shaft 6 substantially at the center.
5a, and the handle shaft 65a is supported by the bearing hole 77 of the intermediate case 71 and the cylindrical bearing hole 78 of the second side case 70. The handle 65 has its handle shaft 65
A handle portion 65b and a link connecting portion 65c are provided on opposite sides of the center a.

The link 86 has, for example, a U-shape. One end of the link 86 is fitted in the link connecting portion 65c, and the other end is fitted in and connected to a latch shaft hole 67a provided in an intermediate portion of the latch member 67.

The tripping member 68 locks the other end of the latch member 67 in the normal state, and releases the latching of the latch member 67 when an abnormal current is detected to release the contact 72.
73 is forcibly opened.

The trip member 68 includes a trip shaft 68a,
It has a bimetal receiving portion 68b, a latch locking portion 68c, and a rotation restricting portion 68d, and a trip shaft 68a is pivotally supported so as to be rotatable with respect to the intermediate case 71. At this time, the rotation restricting portion 68d is locked with the rotation restricting convex portion 87 of the intermediate case 71, and the tripping member 68 is fixed to the fixed-side electric circuit configuration 7.
Rotation to the side of 9, 82 is prevented.

The latch member 67 is locked at one end by a latch portion 67b to a latch locking portion 68c of the tripping member 68, and at the other end by a pressing portion 67c, the protrusion 6 of the driving member 66 is formed.
6e.

The second side case 70 is overlaid on one surface side of the first side case 69 via the intermediate case 71, conceals the common parts and the like on the first and second sides, and positions the common parts and the like. Plays the role of holding down.

The operation of the circuit breaker will be described.
FIG. 12 shows an off state, in which the movable contacts 80 b and 83 b are opened by the opening spring 85.

FIG. 13 shows the ON state. When the handle 65 is operated, the latch member 67 is pushed via the link 86, and one end of the latch member 67 is locked to the latch locking portion 68 c of the release member 68. The other end pushes down the driving member 66 and presses the opening spring 85 to move the movable contact 80b.
83b is closed.

The handle 65 is over the hole 81
a. As a result, the input / output terminals 79c (8
2c), conduction between 80e (83e) and current flow.

FIG. 14 shows a case where an overcurrent has flowed. The bimetals 80c and 83c self-heat and bend to push the bimetal receiving portion 68b of the tripping member 68, and the tripping member 68 rotates to latch the latch member. The locking of the 67 is released, so that the drive member 66 moves upward by the return force of the opening spring 85, and the movable contacts 80b and 83b are opened.

When the bimetals 80c and 83c have returned and the accident has been recovered, the handle 65 is turned off, so that the latch member 67 is pulled up by the link 86 and locked to the trip member 68.

According to this embodiment, the handle 65,
A circuit breaker can be configured by laterally fitting many members such as the driving member 66, the latch member 67, and the tripping member 68 from the side surface of the body 64, so that components can be easily incorporated and excellent productivity can be achieved. This has the effect of having

Further, since the driving member 66 and the latch member 67 are separated, the driving member and the latch member can be separately mounted, and the assembling workability when assembling into the body 64 is facilitated. This has the effect.

The input / output terminals 79c, 82c and 82c, 83e are respectively disposed on the first side case and the second side case via the intermediate case 71, and the driving member 66 and the tripping member 68 are moved from one side to the other side. Of each input / output terminal 7 by the intermediate case 71.
9c, 82c and 82c, 83e can be insulated, and the multipole type can be used.

[0105]

As described above, according to the first aspect of the present invention, a body constituted by combining at least two cases in which parts are mounted as a side-fitting type, and a part protruding from the body. A handle pivotally attached to the body,
A driving member that is pressed and driven along the inner wall of the body by the rotating operation of the handle, a movable contact that is rotated by the pressing drive of the drive member by the handle, and a movable contact that is movable when the movable contact rotates. A fixed contact having a fixed contact with which a contact comes into contact, a latch member interposed between the handle and the drive member and latched by allowing the drive member to be driven by the handle in a normal state, and biasing the latch member in a latching direction In a state in which the latch member is rotatably pivotally attached to the body and the latch member is latched, and the latch member is unlocked by driving the trip member when an abnormal current flows. An abnormal current detection device that forcibly opens the movable contact from the fixed contact is provided, so many of the main members such as the handle, drive member, latch member, and trip member are removed from the side of the body. Possible to construct the circuit breaker by fitting a result, easy to incorporate a component, an effect that has excellent productivity.

According to a second aspect of the present invention, in the circuit breaker of the first aspect, a latch member is connected to the handle via a link, and a latch portion is provided at one end of the latch member to be latched by the release member. At the same time, a pressing portion for pressing and driving the driving member is provided on the other end side, and furthermore, the latch member and the driving member are separated, so that the driving member and the latch member can be separately mounted, and these members can be mounted on the body. This has the effect of improving the workability of assembling when assembling.

According to a third aspect of the present invention, there is provided the circuit breaker according to the first or second aspect, wherein the body is provided between the two side cases in which the components are mounted as a horizontal fitting type, and an intermediate member disposed between the two side cases. The movable contact and the fixed contact are respectively disposed for each pole between the intermediate case and the two-sided case, and the driving member and the tripping member are straddled over the respective poles on the intermediate case. Since there is a hole to be arranged
It is possible to easily position components common to the respective poles, and to insulate the respective input / output terminals by the intermediate case, so that the multipole type can be used.

According to a fourth aspect of the present invention, in the circuit breaker of the third aspect, a through portion penetrating between each side case is provided on the bottom side of the intermediate case, and the unbalanced current of each pole is provided in the through portion. Since the storage part for the zero-phase current transformer to be detected is provided, it is easy to insert an electric wire from each pole into the zero-phase current transformer, and there is an effect that storage efficiency is improved.

[Brief description of the drawings]

FIG. 1 is a side view showing a state in which a breaking element of a circuit breaker is opened.

FIG. 2 is a side view illustrating a state in which a breaking element of the circuit breaker is closed.

FIG. 3 is an overall exploded perspective view of the circuit breaker.

FIG. 4 is an exploded perspective view showing opposing surfaces of a first side case and an intermediate case.

FIG. 5 is an external perspective view of the circuit breaker.

FIG. 6 is an exploded perspective view showing a relationship between a driving member and a movable contact.

FIG. 7 is a side view showing a state where a zero-phase current transformer is attached to the first side case.

FIG. 8 is a side view showing a state where an intermediate case is attached to the first side case.

FIG. 9 is a side view showing an overcurrent trip state of the circuit breaker.

FIG. 10 is a side view showing a short-circuit trip state of the circuit breaker.

FIG. 11 is a side view showing an earth leakage trip state of the circuit breaker.

FIG. 12 is a side view showing a state in which a breaking element of the circuit breaker is opened.

FIG. 13 is a side view showing a state in which a breaking element of the circuit breaker is closed.

FIG. 14 is an overall exploded perspective view of the circuit breaker.

FIG. 15 is a side view showing an overcurrent trip state of the circuit breaker.

FIG. 16 is a side view of a conventional circuit breaker.

FIG. 17 is a side view of a conventional circuit breaker.

FIG. 18 is a side view of a conventional circuit breaker.

FIG. 19 is a partially exploded perspective view of a conventional circuit breaker.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Body 2 Handle 3 Drive member 4 Latch member 4b Latch part 4c Press part 5 Tripping member 6 First side case 7 Second side case 8 Intermediate case 12 Zero phase current transformer 12a Storage space 13 Leakage detection circuit 14 Electromagnet device 14a Plunger 14b Interlocking member 17 First fixed-side electric circuit configuration 17a First fixed contact 17b First fixed contact 17c First terminal (quick connection terminal structure) 18 First movable-side electric circuit configuration 18a First movable Contact 18b First movable contact 18c First braided wire 18d First bimetal 18e First magnetic plate 18f First terminal (screw type) 22 Hole (for handle) 23 Hole (drive member / remove) 30) Second fixed-side electric circuit configuration 30a Second fixed contact 30b Second fixed contact 30c Second terminal (quick connection terminal structure) 31 Second possible Active-side electric circuit configuration 31a Second movable contact 31b Second movable contact 31c Second braided wire 31d Second bimetal 31e Second magnetic plate 31f Second terminal (screw type) 34 Handle return spring 35 Opening Spring 46 Contact pressure spring 55 Link 56 Shaft hole 57a First magnetic plate 57b Second magnetic plate 64 Body 65 Handle 65a Handle shaft 65b Handle portion 65c Link connection portion 66 Drive member 67 Latch member 67b Latch portion 67c Press portion 68 Tripping member 69 First side case 70 Second side case 71 Intermediate case 76 Terminal storage part 79 First fixed side electric circuit configuration 79a First fixed contact 79b First fixed contact 79c First terminal 80 First Movable electrical circuit configuration 80a First movable contact 80b First movable contact 80c First bimetal 80d First knitting Line 80e First terminal portion 81a Hole portion (for handle) 81b Hole portion (for drive member / tripping member) 82 Second fixed-side electric circuit configuration 82a Second fixed contact 82b Second fixed contact 82c Second 83 The second movable side electric circuit configuration 83a The second movable contact 83b The second movable contact 83c The second bimetal 83d The second braided wire 83e The second terminal 84 The handle return spring 85 The opening spring 86 Link

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Akihiko Hirao 1048 Kazumasa Kadoma, Osaka Prefecture Inside Matsushita Electric Works Co., Ltd. (72) Inventor Hatsune Mizuno 1048 Kazumasa Kazuma Kadoma City Osaka Prefecture Inside Matsushita Electric Works Co., Ltd. (72) Inventor Yoshiya Nakamichi 1048 Kadoma Kadoma, Kadoma City, Osaka Prefecture Inside Matsushita Electric Works, Ltd. (72) Inventor Takanobu Tanaka 1048 Kadoma Kadoma, Kadoma City, Osaka Prefecture Inside Matsushita Electric Works, Ltd. (72) Inventor Yasushi Matsui 1048 Kadoma Kadoma, Kadoma, Osaka Prefecture Inside Matsushita Electric Works, Ltd.

Claims (4)

[Claims] 1. A container constituted by combining at least two cases for mounting components as a side-fitting type, a handle partly protruding from the container and pivotally attached to the container, A driving member that is pressed and driven along the inner wall of the body by the rotating operation of the handle, a movable contact that is rotated by the drive of the driving member by the handle, and a movable contact that rotates when the movable contact is rotated. A fixed contact having a fixed contact with which the movable contact of the movable contact comes into contact, a latch member interposed between the handle and the drive member, and latched so that the drive member can be driven by the handle in a normal state; A trip member rotatably pivotally attached to the body in a state where the latch member is biased in a latching direction, and a trip member for latching the latch member, and the trip member when an abnormal current flows. A circuit breaker comprising: an abnormal current detection device that releases the locked state of the latch member by driving and forcibly opens the movable contact from the fixed contact. 2. The latch member is connected to the handle via a link, a latch portion latched by the release member is provided at one end of the latch member, and the driving member is pressed and driven at the other end. The circuit breaker according to claim 1, further comprising a pressing portion, wherein the latch member and the driving member are separated. 3. The container body is configured by combining two side cases for mounting components as a side fitting type, and an intermediate case disposed between the two side cases, wherein the movable contact and the fixed contact are And each hole between the intermediate case and the two-sided case is provided, and the intermediate case is provided with a hole for arranging the drive member and the tripping member over each pole. The circuit breaker according to claim 1 or claim 2, wherein 4. A through-hole penetrating between the side cases on the bottom side of the intermediate case, and a housing for a zero-phase current transformer for detecting an unbalanced current of each pole is provided in the through-hole. The circuit breaker according to claim 3, wherein: