JPH1116480A - Circuit breaker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make the operation force of a handle small and make a switch operation smooth by arranging a driving member pivotally fixed to an appliance body and driving a moving contact in the direction bringing a moving contact into contact with or separating from a fixed contact. SOLUTION: A driving member 20 is pivotally fixed to an appliance body comprising a side case 2 and a middle case 3, and when a moving contact 52 comes in contact with a fixed contact 50 by rotation, according to the rotation of the driving member 20, the end part of the moving contact 52 side of the driving member 20 pushes a moving contact 31, and a compression spring 42 is compressed. As a result, the moving contact 52 gives contact pressure to the fixed contact 50 as reaction. Since the driving member 20 is pivotally fixed to the appliance body, friction to the appliance body is reduced, the operation of the moving contact 31 driven with the moving member 20 is made smooth, the operation force of a handle 6 is reduced, and switching operation is made smooth.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a circuit breaker.

[0002]

2. Description of the Related Art FIG. 14 shows a conventional example (for example, Japanese Patent Publication No. 61-45338). That is, this circuit breaker pushes the link 151 with the handle 150, and the other end of the latch member 152 whose middle part is connected to the link 151 and whose one end is locked to the tripping member 153, The movable member 155 is driven by the driving member 154 and the movable contact 157 of the fixed contact is brought into contact with the movable contact 157.

[0003]

However, in this circuit breaker, the driving member 154 moves vertically with respect to the body 158, and the area of contact with the body 158 is large, so that the friction is large. Therefore, a large rotation operation force is required for the handle 150, and it has been difficult to perform a smooth opening and closing operation.

Accordingly, it is an object of the present invention to provide a circuit breaker which can reduce the operating force of a handle and can perform a smooth opening and closing operation.

[0005]

According to a first aspect of the present invention, there is provided a circuit breaker including a fixed contact provided with a fixed contact and a movable contact provided with a movable contact which is detachably opposed to the fixed contact. A body, a handle partially protruding from the body and rotatably pivoted in the body, and a rotatable pivotally attached to the body, and the movable contact comes into contact with and separates from the fixed contact. A driving member that drives the movable contact in the direction, an opening spring that biases the driving member in a direction in which the movable contact is separated from the fixed contact, and an abnormal current such as an overcurrent or a short-circuit current. A tripping member that is sometimes tripped, and the opening spring that moves the driving member in a state in which the movable contact is in contact with the fixed contact while being engaged with the handle and being engaged with the tripping member. To release the tripping member Those having a latch member releasing the driven member by engagement of the said trip member with work is removed.

According to the circuit breaker of the first aspect, the driving member is pivotally attached to the body so as to be rotatable, so that friction with the body can be reduced, and the movable member driven by the driving member can move. Since the operation of the contact becomes smooth, the operating force of the handle can be reduced, and a smooth opening / closing operation can be performed. Claim 2
In the circuit breaker described in claim 1, the opening spring is a coil spring, and an axial direction thereof is oriented in a longitudinal direction of the body.

According to the circuit breaker of the second aspect, in addition to the effect of the first aspect, a space can be effectively used in the longitudinal direction of the body, so that the spring length of the opening spring can be increased, The opening force can be increased. According to a third aspect of the present invention, in the circuit breaker according to the first or second aspect, the driving member has a shaft, and the driving member has a groove-shaped opening on an outer surface in an axial direction of the shaft to form an intermediate portion of the movable contactor. It has a concave portion to be inserted in the lateral direction. The movable contact is housed in the concave portion to hold and fix the movable contact, and the driving member is rotated to apply a contact pressure in a state where the movable contact is in contact with the fixed contact. The contact pressure spring is provided.

According to the circuit breaker of the third aspect, in addition to the effects of the first or second aspect, the movable contact is inserted into the concave portion of the driving member and is supported by the contact pressure spring, so that the movable contact is incorporated. Is easy. The circuit breaker according to claim 4 is
In claim 3, the contact pressure spring is a compression spring.

According to the circuit breaker of the fourth aspect, in addition to the effect of the third aspect, a contact pressure spring can be easily incorporated. In the circuit breaker according to claim 5, in claim 3 or claim 4, the movable contact has a recess or a protrusion on both sides, and the protrusion or the protrusion that fits loosely into the recess is provided. A concave ridge for loose fitting is formed in the concave portion of the drive member and the opposing surface of the container facing the concave portion.

According to the circuit breaker of the fifth aspect, in addition to the effects of the third or fourth aspect, the contact pressure spring and the engagement of the recess or projection with the projection or recess can provide
The positioning of the movable contact can be easily performed, and the movable contact can be prevented from coming off. According to a sixth aspect of the present invention, in the circuit breaker according to the fourth aspect, the compression spring is a coil spring, and the movable contact is provided with a projection for fitting one end of the compression spring, and the concave portion is more than the projection. At a position distant from the movable contact, a recess is provided which is inclined toward the projection and supports the other end of the compression spring.

According to the circuit breaker of the sixth aspect, in addition to the effect of the fourth aspect, the compression spring can be positioned, and the movable contact can be positioned at the concave portion and the ridge or the concave ridge of the body. According to a seventh aspect of the present invention, there is provided the circuit breaker according to the third, fourth, fifth, or sixth aspect, wherein the driving member has a contact portion in a direction in which the movable contact is separated.

According to the circuit breaker of claim 7, in addition to the effects of claim 3, claim 4, claim 5, or claim 6, the contact portion hits the movable contact when tripping, and the movable contact is a fixed contact. Since it is driven by the driving member in a direction away from the contact point, contact welding becomes difficult. The circuit breaker according to claim 8, wherein the movable contact is rotated from both sides of the movable contact side end of the concave portion of the drive member according to claim 3, 4, 5, or 6. A separating piece protruding outward in a lateral direction with respect to a direction, wherein an arc-shaped groove for loosely fitting the separating piece is formed in the container body.

According to the circuit breaker of the eighth aspect, in addition to the effects of the third, fourth, fifth and sixth aspects, the arc generated when the movable contact is forcibly opened is: It is possible to make it difficult to enter the direction inside the driving member. According to a ninth aspect of the present invention, in the circuit breaker of the third aspect, the fourth aspect, the fifth aspect or the sixth aspect, the handle is connected to a substantially middle portion of the latch member via a link, and the latch member has one end thereof. Is locked to the tripping member, and the other end presses the driving member.When the tripping member is tripped, the driving force is pressed by the driving member by the opening force of the opening spring. A positioning portion to be contacted by a latch member is provided on the body such that the handle is substantially at a center position between on and off.

According to the circuit breaker of the ninth aspect, in addition to the effects of the third, fourth, fifth or sixth aspect, the forced opening state can be easily recognized by the neutral position of the handle. The circuit breaker according to claim 10 is the circuit breaker according to claim 3, claim 4, claim 5, or claim 6, wherein the body has a pair of side cases and an intermediate case between the pair of side cases, The drive member has shafts at both ends which are pivotally connected to the pair of side cases through the intermediate case, and have the concave portions at both ends for inserting an intermediate portion of the movable contact. A ridge extending in the rotation direction is provided substantially at the center of the movable contact side surface of the drive member, and the ridge slides by one of the pair of side cases and the intermediate case or a combination of both. The groove is formed.

According to the circuit breaker of the tenth aspect, in addition to the effects of the third, fourth, fifth and sixth aspects, insulation between the respective poles can be achieved.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. That is, the circuit breaker includes a housing 1, a handle 6, a driving member 20, a latch member 3,
4. It has a tripping member 35, and the driving member 20 is pivotally connected to the body 1 so as to be freely rotatable. The body 1 has a pair of side cases 2,
4 and an intermediate case 3 between the pair of side cases 2 and 4.
The contact portions 85 and 86 are respectively housed between the intermediate case 3 and the side cases 2 and 4, and the side cases 2 and
A means 81 for opening and closing the contact portions 85 and 86 is housed between the four.
Contact portions 82 and 83 for directly contacting the side cases 2 and 4 with each other
Are provided on the side cases 2 and 4. These contact portions 82 and 83
Are formed on the mounting surface 2a side of the side cases 2 and 4, and the contact portions 82
Is formed so as to extend by the width of the intermediate case 3 and abut on the contact portion 83. A zero-phase current transformer accommodating space 88 is formed between the contact portions 82 and 83 and the end of the intermediate case 3 facing the contact portions 82 and 83.

The intermediate case 3 of the container 1 is overlaid on one side of the first side case 2, and the second side case 4 is overlaid on the first side case 2 via the intermediate case 3. The first side case 2 has a pivot support hole 5 of a handle 6 formed in a substantially cylindrical shape at a position substantially at the upper center, and input / output terminals 7 and 8 located at both ends of the first side case 2.
The intermediate case 3 is provided with a fitting hole 12 fitted around the pivot hole 5, and the engaging portion 9 is engaged with the engagement receiving portions 9, 10. 11 and 13 are provided. The engagement receiving portion 9 has a concave step shape as shown in FIG. 3, the engagement receiving portion 10 has a substantially semi-cylindrical concave shape, and the engaging portion 11 has an inclined portion guided by an edge of the engagement receiving portion 9. The engaging portion 13 is formed in a tubular shape in which a part of the peripheral surface is engaged with the engagement receiving portion 10. In the engaged state, as shown in FIG. 4, the portion between the engagement receiving portions 9 and 10 is sandwiched by the engagement portions 11 and 13.

The first side case 2 has mounting recesses 15 formed at both ends on the mounting surface 2a side, which also serve as the contact portions 82, and has terminal portions formed at positions above the mounting recesses. A first fixed-side electric circuit configuration 17 that forms a contact portion 85 from one surface side of the first side case 2;
A driving member 20 that supports the first movable-side electric circuit configuration 18 and the movable contact 19 of the first movable-side electric circuit configuration 18 is incorporated and positioned and supported. As shown in FIG. 5, the first fixed-side electric circuit configuration 17 includes a fixed contact 21 having a fixed contact 20 and a terminal 8 having a quick connection terminal structure provided at an end of the fixed contact 21. It is incorporated in the positioning support part 68 of the side case 2. Reference numeral 24 denotes a release lever. The first movable-side electric circuit configuration 18 is a movable contact 1 using a leaf spring having a movable contact 25 that comes into contact with and separates from a fixed contact 20.
9 and a terminal screw type terminal 7 connected to this end portion, and are incorporated in the positioning support portion 69. The input / output terminals 7 and 8 are provided at mutually separated ends of the first fixed-side electric circuit configuration 17 and the first movable-side electric circuit configuration 18, and are connected to the first side case 2, the intermediate case 3, and the second side case 4. It is arranged to be exposed.

The intermediate case 3 is overlaid on one surface of the first side case 2 to insulate the first fixed-side electric circuit configuration 17 and the first movable-side electric circuit configuration 18 from the adjacent other pole. The intermediate case 3 also serves to position and press the electric circuit configuration and other necessary components with respect to the first side case 2, and forms holes 27 and 28 for the handle 6 and the drive member 20 to escape. As described above, the height is shorter than the height of the first side case 2 in order to form the zero-phase current transformer accommodating space 88 between the lower end portion of the intermediate case 3 and the contact portion 82. On one surface side of the intermediate case 3, a second fixed-side electric circuit configuration 30 constituting the contact portion 86 and a second movable-side electric circuit configuration 32 having the second movable contact 31 incorporated in the driving member 20 are incorporated and supported. ing. The second fixed-side electric circuit configuration 30 and the second movable-side electric circuit configuration 31 have input / output terminals 7, 8 exposed at the ends separated from each other from the first side case 2, the intermediate case 3, and the second side case 4. . The second fixed-side electric circuit configuration 30 includes a fixed contact 51 having a fixed contact 50 and a terminal 8 having a quick connection terminal structure with a release lever 24, and is incorporated in a positioning support portion 66 of the intermediate case 3. The second movable-side electric circuit configuration 32 includes a movable contact 31 having a movable contact 52, a flexible wire 53 connected to the movable contact 31, and a bimetal 5 connected to the flexible wire 53.
4 and a terminal screw type terminal 7 which connects the bimetal 54
And a magnetic plate 55 for detecting a short circuit provided on the terminal 7 and surrounding the bimetal 54.
The movable contact 31 is held by the driving member 20. 63 is a bimetal adjustment screw, and 65 is a handle return spring.

In this manner, the body 1 is made up of the fixed contacts 20,
Fixed contacts 21, 51 provided with 50 and fixed contact 2
Movable contacts 19 and 31 provided with movable contacts 25 and 52 opposing to and detachable from 0 and 50 are housed. Contact part 8
Means 81 for opening and closing 5,86 movable contacts 19,31
The handle 6 partially projects from the body 1 and is pivotally connected to the body 1, and the movable contacts 25 and 52 are rotatably connected to the body 1 and the movable contacts 25 and 52 are fixed contacts 20, A driving member 2 for driving the movable contacts 19 and 31 in a direction of coming and going from
0, and an opening spring 42 for urging the driving member 20 in a direction in which the movable contacts 25, 52 are separated from the fixed contacts 20, 50.
A tripping member 35 that trips when an abnormal current such as an overcurrent or a short-circuit current is detected, and movable contacts 25 and 52 that are interlocked with the handle 6 and are locked to the tripping member 35. The driving member 20 is pressed against the opening spring 42 in a state where the driving member 20 is
And a latch member 34 that releases the driving member 20 by releasing the engagement with the tripping member 35 by the tripping operation.

The handle 6, the driving member 20 and the tripping member 35 pass through the intermediate case 3 and are pivotally connected between the side cases 2 and 4. The drive member 20 includes a shaft portion 3 rotatably and pivotably mounted between the first side case 2 and the second side case 4.
9, and an intermediate portion of the movable contact 19 is opened to the driving member 20 in the groove on the outer surface of the shaft portion 39 in the axial direction.
Recess 37 and movable contact 31 inserted laterally from side
A concave portion 38 is provided for inserting an intermediate portion of the second member laterally from the second side case 4 side. As shown in FIG. 8, a cylindrical shaft hole 40 in which the shaft 39 is formed in the first side case 2 and the second side case 3.
It is pivoted. Further, there is provided a contact pressure spring 42 which is inserted into the concave portion 38 to press and fix the movable contact 31 and apply a contact pressure in a state where the driving member 20 rotates and the movable contact 52 contacts the fixed contact 50. The contact pressure spring 42 uses a coil spring of a compression spring. Therefore, when the movable contact 52 is separated from the fixed contact 50, the movable contact 3
1 is pressed against the upper surface of the concave portion 38 by the contact pressure spring 42, but when the driving member 20 rotates and the movable contact 52 contacts the fixed contact 50, the driving member 20 rotates with the rotation of the driving member 20. At the end 20a of the movable contact side 52, the movable contact 3
1 is pressed to compress the contact pressure spring 42 as shown in FIG.

The movable contact 31 has protrusions 100 on both sides, and the concave streak 101 that fits loosely into the protrusion 100 has a drive member 20.
Are formed on the opposite surface of the container 1 facing the concave portion 38 and the concave portion 38. A contact pressure spring 42 is attached to the movable contact 31.
Is provided with a projection 102 for fitting one end of the
A receiving seat 103 is provided which has a concave shape inclined toward the projection 102 at a position farther from the movable contact 52 than 02 and supports the other end of the contact pressure spring 42.

The movable contact 19 is constituted by a leaf spring for the neutral pole side, and is elastically engaged with the recess 37. In addition, the driving member 20 has a contact portion 105 that hits the moving contact 31 in a direction in which the moving contact 31 is opened. An isolation groove 106 protruding outward in the direction is formed, and an arc-shaped groove 107 for loosely fitting the isolation piece 106 is formed in the housing 1.

Further, as described above, the drive member 20 has shafts 39 at both ends which penetrate the intermediate case 3 and are pivotally connected to the pair of side cases 2 and 4, and insert the intermediate portion of the movable contact 31. And a ridge 110 extending in the rotation direction is provided substantially at the center of the movable contact side surface of the driving member 20, and a combination of both the pair of side cases 2 and the intermediate case 3 is provided. A ridge 110 slides to form a groove 111 (see FIG. 7).

An opening spring 44 for urging the driving member 20 in the direction in which the movable contacts 19 and 31 open the electrode is provided between the first side case 2 and the driving member 20, for example, as shown in FIG. The input / output terminals 7 and 8 are arranged substantially in parallel with the direction perpendicular to the direction in which the cases 4 are stacked, particularly in the direction connecting the input / output terminals 7 and 8. That is,
The opening spring 44 is a coil spring that is a tension spring,
The axial direction is oriented in the longitudinal direction of the body 1, and both ends of the projections 46, 47 provided on the drive member 20 and the first side case 2.
Is hooked on.

A handle 6 is connected to the first side case 2, a latch member 34 connected to the handle 6 via a link 33 to press the drive member 20, and a tripping member for detecting an abnormal current for locking the latch member 34. Common parts including 35
It is incorporated and supported through the holes 27 and 28 of the intermediate case 3. The handle 6 has a shaft 58 at a substantially central portion, and the shaft 58 is supported by the bearing hole 5 of the first side case 2 and the cylindrical bearing hole 59 of the second side case 4. The handle 6 is provided with a handle portion 6a and a link connection portion 6b on opposite sides of the shaft 58.

The link 33 has, for example, a U-shape. One end of the link 33 is fitted in the link connecting portion 6b, and the other end is fitted in and connected to a shaft hole 34a provided in an intermediate portion of the latch member 34. The tripping member 35 locks the other end of the latch member 34 in the normal state, and latches the latch member 3 when an abnormal current is detected.
4 is released to forcibly open the contact portions 85 and 86. The tripping member 35 has a shaft 35a, a bimetal receiving portion 35b, and a latching portion 35c.
And a pair of cylindrical shaft holes 6 formed in the first side case 2 and the second side case 4 through the hole 28 of the intermediate case 3.
The shaft 35a is supported at 0. Further, a magnetic plate 61 facing the magnetic plate 55 surrounding the bimetal 54 is provided.

One end of the latch member 34 is tripped.
5 is latched at the latching portion 35c, and the driving member 20 is fixed at the other end.
The pushing member 20b is pressed and rotated.
The positioning portion 70 against which the latch member 34 pressed by the drive member 20 is pressed by the opening force of the opening spring 44 when the 5 is tripped is moved to the body 1 so that the handle 6 is located at a substantially central position between on and off. (See FIG. 10).

The second side case 4 is superimposed on one surface side of the first side case 2 via the intermediate case 3 to conceal the above-mentioned common parts and the like, and also serves to position and press the common parts and the like. Also, as shown in FIGS. 1 and 12, the first side case 2 is made to pass through the intermediate case 3 by passing a connecting member 73 using rivets, screws, or the like through four holes 90 of the body 1.
The second case 4 is connected to the second case 4 or the intermediate case 3 is formed with a hole 90 in a cylindrical shape having a screw hole, and the first case 2 is connected to the first case 2 by a connecting member 73 using a screw. Then, the second side case 4 and the intermediate case 3 are connected by a connecting member 73 using screws. However, the screw hole may be formed by tapping with a screw. Three of the four locations are at the same location for side cases 2 and 4, but the remaining location is offset. One of them utilizes the center hole of the engaging portion 13. In addition, the first side case 2 and the second side case 4
Holes 91 in two places to directly connect
Are formed and connected by a connector 74 similar to the connector 73.

The operation of the circuit breaker will be described.
FIG. 1 shows an off state, and the movable contacts 19 and 31 are opened by an opening spring 44. FIG. 9 shows the ON state. When the handle 6 is operated, the latch member 34 is pushed through the link 33, and one end of the latch member 34 is engaged with the latch engagement portion 35 c of the tripping member 35 while the other end is engaged. Drive member 2
0 and the movable contact 1 while pulling the opening spring 44.
9, 31 is closed. The handle 6 is locked to the edge of the recess 27 beyond the inversion dead center. As a result, the input / output terminals 7, 8
Electric current flows between the electrodes. FIG. 10 shows a case where an overcurrent flows, in which the bimetal 54 self-heats and bends to push the tripping member 35, and the tripping member 35 rotates to release the latching of the latch member 34. The drive member 20 is rotated by the return force of the pole spring 44, and the movable contacts 19 and 31 are opened.
The latch member 34 is pushed up by the drive member 20, and the latch member 34 is engaged with the positioning portion 70 provided in any of the first side case 2, the intermediate case 3, and the second side case, so that the handle 6 is in the neutral posture. When the bimetal 54 has returned and the accident has recovered, the steering wheel 6 is turned off,
The latch member 34 is pulled up by the link 33 and the trip member 35 is pulled out.
To lock. FIG. 11 shows a case where a short-circuit current flows in the electric circuit. The tripping member 35 is rotated by the attraction force of the magnetic flux flowing through the magnetic plates 54 and 61, and the latch member 34 is tripped. , 31 open.

According to this embodiment, since the driving member 20 is pivotally connected to the body 1 so as to be rotatable, friction with the body 1 can be reduced, and the movable member driven by the driving member 20 can move. Since the operation of the contacts 19 and 31 becomes smooth, the operating force of the handle can be reduced, and a smooth opening / closing operation can be performed. Further, since the space in the longitudinal direction of the body 1, that is, the direction connecting the input / output terminals 7 and 8 can be effectively used, the spring length of the opening spring 44 can be increased, and the opening force can be increased.

The movable contact 31 is inserted into the recess 38 of the driving member 20.
Is inserted and supported by the contact pressure spring 42, so that the movable contact 31 can be easily incorporated. Since the contact pressure spring 42 is formed by a compression spring, the contact pressure spring 42 can be easily incorporated. The contact pressure spring 42 and the projection 100 and the concave strip 101
The positioning of the movable contact 31 can be easily performed by the engagement with the movable contact 31, and the movable contact 31 can be prevented from coming off.

The contact pressure spring 42, which is a compression coil spring, can be positioned, and the movable contact 31 can be positioned on the projection 100 and the concave ridge 101 of the body 1. When the contact portion 105 hits the movable contact 31 when a trip occurs, the movable contact 52 moves away from the fixed contact 50 in the driving member 2.
Since it is driven by 0, it is difficult to weld the contacts.

The separating member 106 protrudes outward in the horizontal direction with respect to the rotating direction of the movable contact 31 from both sides of the movable contact 52 side end of the concave portion 38 of the driving member 20. Is formed, the arc generated when the movable contact 52 is forcibly opened is
It is possible to make it difficult to enter the inside of the driving member 20.

When the tripping member 35 is tripped, the positioning portion 70 which the latch member 34 pressed by the driving member 20 contacts due to the opening force of the opening spring 44 is positioned substantially at the center of the position where the handle 6 is turned on and off. As described above, the forced opening state can be easily recognized by the neutral position of the handle 6 because the vehicle body 1 is provided. A ridge 110 extending in the rotation direction is provided substantially at the center of the surface of the drive member 20 on the side of the movable contact 31.
Is formed, the insulation between the poles can be achieved.

Since the contact portions 85 and 86 are respectively housed between the intermediate case 3 and the pair of side cases 2 and 4, the contact portions 85 and 86 can be isolated from each other.
Since the contact portions 82 and 83 between the four cases 4 are provided,
It is possible to easily eliminate the positional deviation between the side cases 2 and 4 as well as the positional deviation between the side case 4 and the intermediate case 3, thereby improving the storability of parts.

The means 81 for opening and closing the contact portions 85 and 86 includes:
A handle 6, a drive member 20 which is pressed to one end of a latch member 34 connected to the handle 6 via a link 33, and drives the contact portions 85, 86 to open and close; and the other end of the latch member 34 in a normal state. And a tripping member 35 for unlocking the latch member 34 and forcibly opening the contact portions 85 and 86 when an abnormal current is detected.
Since the handle 6, the driving member 20, and the tripping member 35 are rotatably pivoted between the side cases 2, 4 through the intermediate case 3, errors in pivot positions between the members can be reduced.

The connection between the side cases 2 and 4 and the intermediate case 3 is connected to the connecting member 73, and the contact portions 82 and 83 of the side cases 2 and 4 are connected by the connecting member 74. Rattle can be prevented. Contact part 8
Since 2 and 83 are the mounting surfaces 2a of the side cases 2 and 4,
It is possible to prevent rattling when the circuit breaker is mounted on a distribution board or the like.

Further, in the embodiment, the first fixed-side electric circuit configuration 17 and the first movable-side electric circuit configuration 18 and the driving member 20 which are the components of the first pole are incorporated in the first side case 2 and the intermediate case 3 And the common parts such as the second fixed-side electric circuit configuration 30 and the second movable-side electric circuit configuration 32, which are the components of the second pole, and the handle 6 are assembled, and the second side case 4 is overlapped. Because it is assembled
All the components can be assembled from the direction in which the intermediate case 3 and the second side case 4 are overlapped, and the alignment of the components of each pole with the common components is facilitated, and the work of assembling the components is facilitated.

The intermediate case 3 is connected to the pivot hole 5 of the first side case 2.
By engaging with the engagement receiving portions 9 and 10, the intermediate case 3 can be easily incorporated into the first side case 2. First
The movable-side electric circuit configuration 18 is assembled into the first side case 2, the movable contact 19 is fitted into the concave portion 37 of the drive member 20, and the movable contact 31 is fitted into another concave portion 38 of the drive member 20. Movable contact 1
9 and 31 can be easily mounted on the driving member 20.

The longitudinal direction of the body 1, that is, the second side case 4
Since the opening springs 44 are mounted in the overlapping direction of the second case 4, the space for accommodating the opening springs 44 can be effectively used and increased, without increasing the size of the second side case 4 in the overlapping direction. , Movable contacts 19 and 3 with respect to drive member 20
1 can be strengthened in the opening direction. In the present invention, the engagement receiving portions 9 and 10 may be provided near either one of the input / output terminals or not. Although the common parts such as the handle 6 are supported by the first side case 2 and the second side case 4, they may be supported by the intermediate case 3, particularly, for example, between the first side case 2 and the intermediate case 3, or in the middle. It may be supported between the case 3 and the second side case 4.

The contact portions 82 and 83 and the contact portions 82 and 83
The space 88 for accommodating the zero-phase current transformer is formed between the end of the intermediate case 3 and the end of the intermediate case 3 which is opposed to the above. . The common parts for opening and closing the contact portions 85 and 86 are supported between the side cases 2 and 4.
It may be configured to support between the intermediate case 3.

The movable contact 31 has the protrusions 100 formed on both sides. The protrusions which form the recesses and are loosely fitted into the recesses are formed by the recesses 38 of the drive member 20 and the body facing the recesses 38. It may be formed on one opposing surface. Further, the convex portion 100 is formed only on the movable contact 31 on the concave portion 38 side.
The movable contact on the seventh side may also be formed in the same configuration as the movable contact 31 instead of the leaf spring to form the protrusion 100 or the like.

A groove 111 on which the ridge 110 slides is formed by a combination of one of the pair of side cases 2 and the intermediate case 3, but the groove is formed only by the side case 2 or 4 or only the intermediate case 3. The ridge 111 may be formed.

[0045]

According to the circuit breaker of the first aspect, the driving member is pivotally attached to the body so as to be rotatable, so that friction with the body can be reduced, and the circuit breaker is driven by the driving member. Since the operation of the movable contact becomes smooth, the operating force of the handle can be reduced, and a smooth opening and closing operation can be performed.

According to the circuit breaker of the second aspect, in addition to the effect of the first aspect, a space can be effectively used in the longitudinal direction of the body, so that the spring length of the opening spring can be made longer. The opening force can be increased. According to the circuit breaker of the third aspect, in addition to the effects of the first or second aspect, the movable contact is inserted into the recess of the driving member and supported by the contact pressure spring, so that the movable contact can be easily incorporated. is there.

According to the circuit breaker of the fourth aspect, in addition to the effect of the third aspect, a contact pressure spring can be easily incorporated. According to the circuit breaker of the fifth aspect, in addition to the effects of the third or fourth aspect, the movable contactor is formed by the contact pressure spring and the engagement of the recess or the projection with the projection or the recess. Can be easily positioned, and the movable contact can be prevented from coming off.

According to the circuit breaker of the sixth aspect, in addition to the effects of the fourth aspect, the compression spring can be positioned, and the movable contact can be positioned at the concave portion and the ridge or the concave ridge of the body. According to the circuit breaker of the seventh aspect, in addition to the effects of the third, fourth, fifth, or sixth aspect, the direction in which the movable contact comes away from the fixed contact when the trip portion hits the movable contact when tripped. The contact member is hardly welded.

According to the circuit breaker of the eighth aspect, in addition to the effects of the third, fourth, fifth and sixth aspects, the arc generated when the movable contact is forcibly opened is: It is possible to make it difficult to enter the direction inside the driving member. According to the circuit breaker of claim 9, in addition to the effects of claim 3, claim 4, claim 5, or claim 6,
The forced opening state can be easily recognized by the neutral position of the handle.

According to the circuit breaker of the tenth aspect, in addition to the effects of the third, fourth, fifth and sixth aspects, insulation between the poles can be achieved.

[Brief description of the drawings]

FIG. 1 is a side view showing a state where a handle and the like according to an embodiment of the present invention are incorporated.

FIG. 2 is an overall exploded perspective view.

FIG. 3 is a perspective view showing opposing surfaces of a first side case and an intermediate case. It is.

FIG. 4 is a partial view showing a first side case, an intermediate case, and a part of a locking portion.

FIG. 5 is a side view showing a state in which a first fixed-side electric circuit configuration and a first movable-side electric circuit configuration are incorporated in a first side case.

FIG. 6 is a side view showing a state in which a second fixed-side electric circuit configuration and a second movable-side electric circuit configuration are incorporated in an intermediate case attached to the first side case.

FIG. 7 is a partial perspective view showing attachment of a driving member.

FIG. 8 is an exploded perspective view showing a relationship between a driving member and a movable contact.

FIG. 9 is a side view of a state where a second side case in an on state is removed.

FIG. 10 is a side view of an overcurrent trip state.

FIG. 11 is a side view of a short-circuit trip state.

FIG. 12 is an external perspective view of the circuit breaker.

FIG. 13 is a side view thereof.

FIG. 14 is an exploded perspective view of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Body 2 Side case 3 Intermediate case 4 Side case 6 Handle 19 Movable contact 20 Drive member 25 Movable contact 31 Movable contact 33 Link 34 Latch member 35 Tripping member 37, 38 Recess 39 Shaft 42 Contact pressure spring 44 Opening Spring 50 Fixed contact 51 Fixed contact 52 Moving contact 70 Positioning part 100 Protrusion 101 Depressed ridge 102 Protrusion 103 Receiving seat 105 Contact part 106 Separation piece 107 Arc-shaped groove 110 Protrusion ridge 111 Groove

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

Claims (10)

[Claims] A container housing a fixed contact provided with a fixed contact and a movable contact provided with a movable contact opposing and detachable from the fixed contact, and a body partially protruding from the body. A handle rotatably pivotally mounted on the body, a driving member rotatably pivotally mounted on the body and driving the movable contact in a direction in which the movable contact comes into contact with and separate from the fixed contact; An opening spring that urges the driving member in a direction in which the movable contact is separated from the fixed contact, a tripping member that trips when an abnormal current such as an overcurrent or a short-circuit current is detected, and The driving member is pressed against the opening spring in a state where the movable contact is in contact with the fixed contact while being engaged with the tripping member, and the tripping operation of the tripping member is performed. That the lock to the tripping member is released A circuit breaker further comprising a latch member for releasing the driving member. 2. The circuit breaker according to claim 1, wherein the opening spring is a coil spring, and its axial direction is oriented in the longitudinal direction of the body. 3. The driving member has a shaft, and has a recess on the outer surface in the axial direction of the shaft, the recess being formed in a groove shape to insert an intermediate portion of the movable contact in a lateral direction. 3. A contact pressure spring which presses and fixes the movable contact and is provided with a contact pressure for applying a contact pressure in a state where the movable contact comes into contact with the fixed contact when the movable member is rotated. The described circuit breaker. 4. The compression spring according to claim 3, wherein said contact pressure spring is a compression spring.
The described circuit breaker. 5. The movable contact has a concave portion or a protrusion on both sides, and a protrusion that loosely fits into the recess or a groove that loosely fits the protrusion is formed in the concave portion of the driving member. The circuit breaker according to claim 3 or 4, wherein the circuit breaker is formed on a facing surface of a body facing the recess. 6. The compression spring is a coil spring, and the movable contact is provided with a projection for fitting one end of the compression spring, and the recess is provided on the projection at a position more distant from the movable contact than the projection. The circuit breaker according to claim 4, further comprising a seat having a concave shape inclined toward the other and supporting the other end of the compression spring. 7. The drive member according to claim 3, wherein the drive member has a contact portion that contacts the movable contact in a direction of separating the movable contact.
The circuit breaker according to claim 5 or claim 6. 8. A separating member protruding laterally outward with respect to a rotation direction of the movable contact from both sides of an end of the concave portion of the driving member on the movable contact side, wherein the isolation is provided on the body. 7. The circuit breaker according to claim 3, wherein an arc-shaped groove for loosely fitting the piece is formed. 9. The handle is connected to a substantially middle portion of the latch member via a link, and the latch member locks one end of the latch member to the trip member and presses the drive member at the other end. When the tripping member performs a tripping operation, the positioning portion to which the latch member pressed by the driving member by the opening force of the opening spring comes into contact with the positioning member so that the handle is substantially at the center position between on and off. 7. The circuit breaker according to claim 3, wherein the circuit breaker is provided on a housing. 10. The body has a pair of side cases and an intermediate case between the pair of side cases, and the driving member extends through the intermediate case and is pivotally connected to the pair of side cases. At both ends, and having the concave portion at the both ends for inserting an intermediate portion of the movable contact, wherein the protrusion extends in the rotation direction substantially at the center of the movable contact side surface of the driving member. 7. A groove in which said ridge slides is formed by one of said pair of side cases and a combination of either or said intermediate case, or both. Circuit breaker.