JP2005353439A - Circuit breaker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a circuit breaker in which an alarm switch member or an auxiliary switch member can be housed, and which does not add constraints to designing of a mechanical unit and a leakage current detection unit regardless of whether the circuit breaker is a circuit breaker for wiring or a ground fault interruptor. <P>SOLUTION: The circuit breaker comprises a body made up of a case and a cover; a power supply terminal housing which is placed at one end of the body, and in which power supply terminals are arranged; a load terminal housing which is placed at the other end of the body, and in which load terminals are arranged; a contact device which is placed on a current passage from the power supply terminals to the load terminals; a switching mechanism which opens and closes the contact device, and includes a handlebar; an overcurrent tripping means which acts on the switching mechanism to open the contact device in overcurrent occurring and the like; and a switch element which is driven by the action of a linkage element following the action of the switching mechanism and outputs a contact signal. The switch element is placed in the power supply terminal housing or the load terminal housing. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to a circuit breaker used for a distribution board, and more particularly, to an agreement type circuit breaker for a lamp distribution board, and to a two-pole circuit breaker configured to maintain the agreement unit width dimension.

Conventionally, as an example of a two-pole circuit breaker configured to maintain the agreement unit width dimension as shown in Annex 5 of Japanese Industrial Standard JIS-C8370, there is a circuit breaker as shown in FIG. .

FIG. 17 relates to a circuit wiring circuit breaker. This wiring circuit breaker includes a case having a substantially I-shaped cross section having a partition in the center and two left and right electrode covers combined on both sides of the case. An insulating body having a pair of left and right legs, an opening / closing handle rotatably connected to the case across the partition wall by the legs, and a plate surface along the case partition wall A flat left and right two-pole movable contact having one end pivotably connected to the leg of the opening / closing handle and a movable contact attached to the other end; a strip-shaped bimetal; a flat base; It has a U-shaped magnetic path consisting of legs bent on both sides, a fixed iron core that surrounds the bimetal from the width direction at both legs, and is supported rotatably at one end parallel to the bimetal. The other end of the armature is fixed The armature includes a flat armature facing the core and a return spring that urges the armature to the side opposite to the fixed iron core, and the armature plate surface is disposed on one side of the partition so as to follow the case partition. An overcurrent tripping element is disposed between the partition and the overcurrent tripping element so that the plate surface is along the case partition, and is rotatably supported by the case at one end and at the other end. A claw projecting sideways is disposed between the flat latch latched by the claw on the step portion on the side of the armature, the case partition and the left and right two-pole movable contacts, A left and right two-pole open / close spring comprising a tension spring spanned between the movable contact and the latch, and the overcurrent tripping element are provided on the bimetal or armature loosely to -An adjustment screw that is screwed into the armature or bimetal and whose head faces the bimetal or armature through a gap, and a fixed contact that faces the movable contact are attached, and a terminal is integrally formed on both sides of one end of the case partition wall. Left and right two-pole fixed contacts arranged respectively;
Left and right two-pole terminals respectively disposed on both sides of the other end of the case partition, between one end of the overcurrent tripping element and the movable contact on one side of the case partition, and of the bimetal A lead wire for connecting between the other end and the terminal, and a lead wire for connecting between the movable contact and the terminal on the other side of the case partition.

FIG. 18 relates to a leakage breaker configured by adding a leakage detection function to this wiring breaker, and between the overcurrent tripping element and the movable contact and the terminal on both sides of the case partition. A zero-phase current transformer in which the left and right two-pole conductors to be connected or the left and right two-pole conductors to be connected between the first and second overcurrent tripping elements and the terminals are primary conductors; A leakage detection circuit that amplifies the secondary output of the phase current transformer, a trip coil unit that is driven by the output of the leakage detection circuit and sucks the plunger against the return spring, and in conjunction with the suction operation of the plunger An earth leakage trip element comprising a trip lever for moving the armature of the overcurrent trip element or the armature of the first overcurrent trip element to the fixed iron core side is provided.

Also, in recent years, in the agreement type circuit breaker for the light distribution board, the circuit breaker of the circuit breaker has been constructed while constituting the circuit breaker having the function of two poles with the agreement unit width dimension, that is, the width dimension for one pole. There is a need for a multifunctional circuit breaker with a built-in alarm switch that electrically indicates the trip state or an auxiliary switch that electrically indicates the open / closed state of the circuit breaker contact. As an example in which an alarm switch is built in, as shown in FIG. 19, there is one in which an alarm switch can be built in by arranging a micro switch along a central partition wall of a case having an I-shaped cross section. That is, an alarm switch composed of a micro switch is provided along the case partition so as to be interlocked with the latch, and this alarm switch is fitted with a projection formed in the case partition and sandwiched between the case partition and the cover. It is comprised so that it may fix.
Japanese Patent Laid-Open No. 10-64402 (Nos. 0007, 0011, 0019, FIGS. 4, 17, and 26)

However, the conventional circuit breaker has the following problems.

The main body of this conventional circuit breaker consists of an insulator consisting of a case with a substantially I-shaped cross section with a bulkhead in the center and two left and right pole covers combined on both sides of this case. On both sides of the case bulkhead, the left and right two-pole conductors connecting between the overcurrent tripping element and the movable contact and the terminal, or between the first and second overcurrent tripping elements and the terminal, respectively. Are driven by the output of this leakage detection circuit, a zero-phase current transformer having a left and right two-pole conductor connecting each as a primary conductor, a leakage detection circuit that amplifies the secondary output of this zero-phase current transformer, A trip coil unit that sucks the plunger against the return spring, and the armature of the overcurrent tripping element or the armature of the first overcurrent tripping element are moved to the fixed iron core side in conjunction with the plunger pulling operation. And it is configured to provide a leakage trip device comprising a tripping lever is.

On the other hand, the alarm switch can be built in by arranging the micro switch along the central partition wall of the case having the I-shaped cross section.

For this reason, there is a restriction that the leakage detection function and the alarm switch function are provided exclusively for the circuit breaker. Usually, there are cases where an alarm switch is provided for a circuit breaker for wiring and an alarm switch is provided for an earth leakage breaker. Therefore, in the circuit breaker shown in the conventional example, an alarm switch may be provided for the earth leakage breaker. However, it was difficult to make the circuit breaker multifunctional, such as providing both a leakage detection function and an alarm switch function for the circuit breaker, due to its internal structure.

The present invention has been made to solve the above-described problems. The circuit breaker is provided regardless of whether the circuit breaker is a wiring breaker or a leakage breaker. An alarm switch member that electrically outputs the trip state of the circuit to the outside or an auxiliary switch member that electrically outputs the open / closed state of the contact of the circuit breaker to the outside can be built-in. An object of the present invention is to provide a circuit breaker that does not impose restrictions on the design of the mechanism section, leakage detection section, and the like.

In order to achieve the above object, claim 1 of the present invention provides:
The case and cover constitute the body,
One end of the vessel body is provided with a power terminal housing portion provided with a power terminal, and the other end is provided with a load terminal housing portion provided with a load terminal.
In the current path from the power terminal to the load terminal,
A contact device comprising a movable contact provided with a movable contact and a fixed contact provided with a fixed contact opposite to the movable contact;
An opening / closing mechanism comprising a handle member for opening or closing the contact device;
Overcurrent tripping means that acts on the switching mechanism to open the movable contact when overcurrent occurs; and
An opening / closing operation by operating the handle member and an opening operation by overcurrent, or an opening / closing operation by operating the handle member are arranged on a trajectory where the opening / closing mechanism moves, and abuts the opening / closing mechanism to A linkage member that follows the movement;
A switch member that is driven by the operation of the linkage member and outputs a contact signal;
The switch member is provided in a power supply terminal accommodating portion or a load terminal accommodating portion to provide a circuit breaker.
As a result, the main components of the circuit breaker, such as a switching mechanism, are arranged inside the power terminal housing and the load terminal housing, and the switch that outputs the circuit breaker trip state and contact switching state to the outside Since the members are arranged in the power terminal housing part or the load terminal housing part, the main components can be provided without being affected by the arrangement of the switch members, and conversely, the switch members are affected by the arrangement of the main components. Therefore, when the switch member is built in, a circuit breaker that does not impose restrictions on the design and arrangement of the mechanism that forms the circuit breaker can be formed.

In claim 2,
The case and cover constitute the body,
One end of the vessel body is provided with a power terminal housing portion provided with a power terminal, and the other end is provided with a load terminal housing portion provided with a load terminal.
In the current path from the power terminal to the load terminal,
A contact device comprising a movable contact provided with a movable contact and a fixed contact provided with a fixed contact opposite to the movable contact;
An opening / closing mechanism comprising a handle member for opening or closing the contact device;
Overcurrent tripping means that acts on the switching mechanism to open the movable contact when overcurrent occurs; and
An earth leakage trip device that detects an unbalanced current and acts on the switching mechanism to open the contact device;
An opening / closing operation by operating the handle member and an opening operation by an overcurrent and an unbalanced current, or an opening / closing operation by operating the handle member are arranged on a trajectory where the opening / closing mechanism moves, and abuts the opening / closing mechanism. A linkage member that follows the operation of the opening and closing mechanism;
A switch member that is driven by the operation of the linkage member and outputs a contact signal;
The switch member is a circuit breaker characterized in that the switch member is disposed in a power terminal accommodating part or a load terminal accommodating part.
As a result, the main components of the circuit breaker, such as the switching mechanism and earth leakage trip device, are arranged inside the power terminal housing and the load terminal housing, so that the circuit breaker trip state and contact switching state can be controlled. Since the switch that outputs to the outside is arranged in the power terminal housing or the load terminal housing, the main components can be provided without being affected by the switch arrangement, and conversely, the switch member is the main component. The circuit breaker can be provided without being affected by the arrangement, and when the switch member is built in, a circuit breaker that does not restrict the design and arrangement of the mechanism part constituting the circuit breaker can be formed.

As described above, according to the present invention, an alarm that electrically outputs a trip state of a circuit breaker to the outside regardless of whether the circuit breaker is a wiring breaker or a leakage breaker. An auxiliary switch that electrically outputs the open / closed state of the switch or circuit breaker contact to the outside can be built in. When installing each switch, there are restrictions on the design and layout of the mechanical part and leakage detection part that constitute the breaker. It is possible to provide a circuit breaker that can incorporate a switch without giving it.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows an internal structure diagram of a circuit breaker when the power supply terminal side is the right side. In FIG. 1, an N phase is arranged on the front side and an L phase (not shown) is arranged on the far side. FIG. 2 is a view of the circuit breaker of FIG. 1 as viewed from the opposite side. In FIG. 2, the L phase is arranged in front and the N phase is arranged in the back.

The circuit breaker is composed of a case 100 and a cover 200.

The body is provided with a power supply terminal 101 and a load terminal 102, and a movable contact 1031 provided with a movable contact 1031a is paired with the movable contact 1031a in an energizing path from the power supply terminal 101 to the load terminal 102. A contact device 103 comprising a fixed contact 1032 having a fixed contact 1032a opposite to the contact device 103, an opening / closing mechanism 105 including a handle member 1051 for opening or closing the contact device 103, and an overload in the electric circuit. Overcurrent tripping means 108 is provided which acts on the switching mechanism 105 when a current is generated and opens the movable contact 1031a.

In the case 100, a handle member 1051 is rotatably supported via a pin 1054. The handle member 1051 has an arm portion 1051a extending downward in the figure, and a movable contact latch provided at one end thereof. The movable contact 1031 is rotatably supported by the portion 1052b.

Further, an arm 1052 is rotatably supported on the case 100 via a pin 1055, and an operating plate 1054 is also rotatably supported via a pin 1056. An engagement portion 1054a for engaging the contact device 103 is provided so that the contact device 103 can be opened and closed by operating the handle member in a state where the arm 1052 is engaged with the operation plate 1054. It is composed.

The arm 1052 and the movable contact 1031 are provided with spring member latching portions 1053a and 1053b, and a spring member 1053 made of a tension spring is hooked and biased so that they are attracted to each other. In the handle member 1051 and the movable contact 1031 constituting the link, the movable contact locking portion is defined by using a line connecting the spring member locking portion 1053b of the movable contact 1031 and the pin 1054 as the rotation center of the handle member 1051 as a dead line. 1052b is arranged so as to cross the dead line to the load terminal side in the figure, and the movable contactor 1031 maintains the illustrated posture in the ON state. The handle member 1051 is provided with a handle rotation angle restricting portion 1051b that comes into contact with the case 100 so as to define the upper limit of the rotation angle.

The handle member 1051 and the movable contact 1031 form a link. In FIG. 1, the movable contact 1031 receives a rotational force in the clockwise direction by the restoring force of the spring member 1053, and the movable contact 1031 is The ON state is maintained so as to receive the rotational force counterclockwise and press the fixed contact 1032 (closed state). Next, the case where it is made to operate from this state to an open state is demonstrated.

In FIG. 1, when the handle member 1051 is rotated in the left direction (counterclockwise), the arm portion 1051a is rotated in the right direction (counterclockwise), and the link made up of the handle member 1051 and the movable contact 1031. When the movable contact locking part 1052b crosses the dead line, the action of the spring member 1053 on the movable contact 1031 is reversed, and the movable contact 1031 rotates clockwise around the movable contact locking part 1052b. In response to the force in the direction of, the opening operation is performed from the stationary contact 1032 (FIG. 3 OFF state).

Next, a case where an overcurrent flows through the electric circuit and the overcurrent tripping means 108 acts will be described. When an overcurrent flows in the electric circuit, in FIG. 2, the bimetal 1080 constituting a part of the electric circuit provided in the case 100 bends in a direction away from the operation plate 1054 with the mounting portion 1080a to the case as a fulcrum, and the operation plate The operation plate 1054 is engaged with an adjusting screw 1083 for adjusting an operation time provided in the 1054, and the operation plate 1054 is rotated in a direction in which the engagement amount at the engagement portion 1054 a with the arm 1052 is reduced with the pin 1056 as the rotation center. To do.

When the rotation advances and the locking is released, the arm 1052 rotates clockwise in FIG. 2 with the pin 1055 as the rotation center. Accordingly, the spring member locking portion 1053a also rotates clockwise, and when the spring member locking portion 1053a crosses the line connecting the spring member locking portion 1053b and the movable contact locking portion 1052b, the spring member 1053 with respect to the movable contact 1031 is reached. Thus, the movable contact 1031 receives a force in the counterclockwise direction in the drawing with the movable contact locking portion 1052b as the center of rotation, and performs a contact opening operation, that is, a trip operation (see FIG. 4 Trip state).

Next, in order to re-engage the arm 1052 unlocked by the trip operation and the operation plate 1054, that is, to perform the reset operation, the handle member 1051 is temporarily rotated clockwise (OFF direction) in FIG. The arm 1051a of the handle member 1051 is pressed by the operating force against the protrusion 1052a provided in the vicinity of the pin 1055 serving as the center of rotation of the arm 1052, thereby turning the arm counterclockwise in FIG. Is rotated as a pin 1055, and the engagement portion of the arm 1052 is lifted up to the position of the engagement portion 1054a of the operation plate to be engaged.

Below the power supply terminal 101, a switch member 107 is provided for outputting to the outside the open state of the circuit breaker, that is, the trip state and the contact open / closed state by operating the handle member. The switch member 107 is located below the power supply terminal 101 and between the case 100 and the cover 200 at a position between the substantially L-shaped fixed contact 1032 formed integrally with the power supply terminal 101 and the outer case of the container case 100. It is arranged and fixed so as to be sandwiched between.

The switch member 107 is a type of micro switch that outputs a contact signal when it is pressed by a push button 1072 having a built-in automatic return contact. One end of the switch member 107 is opposed to the push button 1072 and is swingably supported by the switch body. The pressed button operation piece 1071 is integrally formed.

When the switch member 107 is pressed by the push button operation piece 1071, the built-in automatic return contact is driven to output a contact signal.
In addition, a linkage member 106 for transmitting the movement of the opening / closing mechanism 105 to the switch member 107 is provided.

The linkage member 106 is fitted into the case 100 so that one end thereof is the rotation center 106 a and is formed in a substantially L shape. The push button operation piece 1071 is pressed by the rotation to drive the switch member.

Here, a first contact portion 1061 that contacts the mechanism portion 105 when the opening and closing mechanism portion opens and closes by operating the handle member 1051 and an overcurrent tripping means 108 due to overcurrent act on the linkage member 106. A second abutting portion 1062 that abuts on the mechanism portion 105 during the opening operation is provided.

FIG. 5 shows a movement trajectory accompanying the opening / closing operation by operating the arm portion 1051a of the handle member 1051 of the opening / closing mechanism portion 105, and FIG. 6 shows a diagram in which the linkage member 106 is superimposed on FIG. . The linkage member 106 and the arm portion 1051a of the handle member 1051 of the mechanism portion 105 are disposed so as to contact each other at a hatched portion in the drawing.

In the case of going from the ON state to the OFF state, the arm portion 1051a and the first contact portion 1061 come into contact with each other, and the linkage member 106 is pressed counterclockwise in the drawing with the portion 106a as the center of rotation. At 1063, the push button operation piece 1071 is pressed to drive the switch member 107.
Further, the push button 1072 is constantly applied with an outward force due to the automatic return contact of the switch member 107, and thus the push button operating piece 1071 receives the force toward the outside of the switch member 107.

When the circuit breaker changes from the OFF state to the ON state, the abutting arm portion 1051a and the first abutting portion move in directions away from each other, so that the abutting is eliminated. Due to the restoring force of the push button operation piece 1071, the linkage member 106 rotates clockwise in the figure around the rotation center 106a, and is separated from the switch member, so that the switch member is not pressed.

Next, FIG. 7 shows a movement locus associated with the overcurrent tripping operation of the opening / closing mechanism unit 105.
FIG. 8 shows a view in which the linking member 106 is superimposed on FIG. In the overcurrent tripping operation (tripping operation), the arm 1052 and the operating plate 1054 are disengaged, and the arm is rotated counterclockwise in the figure with the pin 1055 as the center of rotation. The portion 1052a also rotates in the same direction, contacts the second contact portion 1062 of the linkage member 106, and the linkage member 106 rotates counterclockwise in the drawing with the portion 106a as the center of rotation by the restoring force of the spring member 1053. The switch is rotated and the switch pressing portion 1063 presses the push button operation piece 1071 to drive the switch member 107. The first contact portion 1061 of the linkage member 106 does not contact the mechanism portion 105.

As described above, the linkage member 106 is operated by the first contact portion that is in contact with the mechanism portion when the handle member 1051 is opened and closed by the operation of the handle member 1051 and the overcurrent tripping means due to overcurrent, and the mechanism portion is opened. And a second abutting portion that contacts the mechanism portion at the same time, and transmits to the switch member two different states of the opening / closing operation by the handle and the releasing operation by the overcurrent It is configured to be able to.

As described above, the main components of the circuit breaker, such as the switching mechanism, are arranged inside the power terminal housing and the load terminal housing, so that the circuit breaker trip status and contact switching status can be controlled externally. Since the switch member 107 that outputs to the power supply terminal accommodating portion or the load terminal accommodating portion is arranged in the power supply terminal accommodating portion, the main components can be provided without being affected by the arrangement of the switch member 107 to constitute a circuit breaker.

Usually, the circuit breaker contact state of the circuit breaker is output to the outside as a circuit breaker A with an auxiliary switch that outputs a contact signal by detecting the opening operation due to overcurrent and the opening operation by operating the handle member. Since there are two circuit breakers B with alarm switches that output contact signals by detecting opening operation due to overcurrent, both circuit breakers A with auxiliary switches and circuit breakers B with alarm switches can be used. Is possible.

In the embodiment, a micro switch is used as a switch member. However, as another switch member, it is possible to output a contact signal to the outside, and it can be arranged in the power supply terminal accommodating portion or the load terminal accommodating portion of the circuit breaker. If it is a thing, a normal pushbutton switch, a toggle switch, etc. may be sufficient.

Next, the case where the circuit breaker of the present invention is an earth leakage breaker will be described with reference to the drawings.

FIG. 9 shows the internal structure of the circuit breaker when the power terminal side is the right side. In FIG. 9, the N phase is arranged on the front side and the L phase (not shown) is arranged on the far side. FIG. 10 is a view of the circuit breaker of FIG. 9 as viewed from the opposite side. In FIG. 10, the L phase is arranged in front and the N phase is arranged in the back. Since the main components are the same as in the previous embodiment, that is, the case where the circuit breaker is a circuit breaker, the common parts will be described using the same numbers as in the previous embodiment.

The circuit breaker is composed of a case 100 and a cover 200.

The body is provided with a power supply terminal 101 and a load terminal 102, and a movable contact 1031 provided with a movable contact 1031a is paired with the movable contact 1031a in an energizing path from the power supply terminal 101 to the load terminal 102. A contact device 103 comprising a fixed contact 1032 having a fixed contact 1032a opposite to the contact device 103, an opening / closing mechanism 105 including a handle member 1051 for opening or closing the contact device 103, and an overload in the electric circuit. Overcurrent tripping means 108 is provided which acts on the switching mechanism 105 when a current is generated and opens the movable contact 1031a.

In the case 100, a handle member 1051 is rotatably supported via a pin 1054. The handle member 1051 has an arm portion 1051a extending downward in the figure, and a movable contact latch provided at one end thereof. The movable contact 1031 is rotatably supported by the portion 1052b.

Further, an arm 1052 is rotatably supported on the case 100 via a pin 1055, and an operating plate 1054 is also rotatably supported via a pin 1056. An engagement portion 1054a for engaging the contact device 103 is provided so that the contact device 103 can be opened and closed by operating the handle member in a state where the arm 1052 is engaged with the operation plate 1054. It is composed.

The arm 1052 and the movable contact 1031 are provided with spring member latching portions 1053a and 1053b, and a spring member 1053 made of a tension spring is hooked and biased so that they are attracted to each other. In the handle member 1051 and the movable contact 1031 constituting the link, the movable contact locking portion is defined by using a line connecting the spring member locking portion 1053b of the movable contact 1031 and the pin 1054 as the rotation center of the handle member 1051 as a dead line. 1052b is arranged so as to cross the dead line to the load terminal side in the figure, and the movable contactor 1031 maintains the illustrated posture in the ON state. The handle member 1051 is provided with a handle rotation angle restricting portion 1051b that comes into contact with the case 100 so as to define the upper limit of the rotation angle.

Reference numeral 210 denotes a tripping coil (hereinafter referred to as a trip coil), and 211 denotes a zero-phase current transformer (hereinafter referred to as CT). The earth leakage breaker shown in the present embodiment is a two-pole circuit in which an earth leakage tripping device comprising a trip coil 210, CT 211, and an earth leakage detector is newly arranged inside the wiring breaker in the embodiment described above. This is a circuit breaker.

The CT 211 is provided with a through hole that penetrates a connection conductor that connects the load-side terminal 102 of each pole and the fixed contact 1032 or the movable contact 1031, and outputs a voltage according to the amount of current flowing through the conductor. The leakage detector has an amplification unit that amplifies the output from the CT 211, performs arithmetic processing, and outputs a signal to the trip coil 210. The harm trip coil 210 is a trip device for opening the contact device, and receives an output from the leakage detector and acts on the opening / closing mechanism 105.

The handle member 1051 and the movable contact 1031 constitute a link. In FIG. 10, the movable contact 1031 receives the rotational force of the spring member 1053, the handle member 1051 receives the rotational force in the clockwise direction, and the movable contact 1031 is The ON state is maintained so as to receive the rotational force counterclockwise and press the fixed contact 1032 (closed state). Next, the case where it is made to operate from this state to an open state is demonstrated.

In FIG. 10, when the handle member 1051 is rotated to the right (clockwise), the arm portion 1051a is rotated to the left (clockwise), and the deadline of the link formed by the handle member 1051 and the movable contact 1031 , The action of the spring member 1053 on the movable contact 1031 is reversed, and the movable contact 1031 rotates counterclockwise around the movable contact locking portion 1052b. The force is applied in the direction, and the opening operation is performed from the fixed contact 1032 (FIG. 11 OFF state).

Next, a case where an overcurrent flows through the electric circuit and the overcurrent tripping means 108 acts will be described. When an overcurrent flows through the electric circuit, in FIG. 10, the bimetal 1080 constituting a part of the electric circuit provided in the case 100 bends in a direction away from the operation plate 1054 with the mounting portion 1080a to the case as a fulcrum. The operation plate 1054 is engaged with an adjusting screw 1083 for adjusting an operation time provided in the 1054, and the operation plate 1054 is rotated in a direction in which the engagement amount of the engagement portion 1054a with the arm 1052 is reduced with the pin 1056 as a rotation center. To do.

When the rotation advances and the locking is released, the arm 1052 rotates clockwise in FIG. 10 with the pin 1055 as the rotation center.

Accordingly, the spring member locking portion 1053a also rotates clockwise, and when the spring member locking portion 1053a crosses the line connecting the spring member locking portion 1053b and the movable contact locking portion 1052b, the spring member 1053 with respect to the movable contact 1031 is reached. Is reversed, and the movable contact 1031 receives a force in the counterclockwise direction in FIG. 10 with the movable contact locking portion 1052b as the rotation center, and performs a contact opening operation, that is, a trip operation from the fixed contact 1032 ( Fig. 12 Trip state).

Next, in order to re-engage the arm 1052 unlocked by the trip operation and the operation plate 1054, that is, to perform the reset operation, the handle member 1051 is temporarily rotated clockwise in 12 (OFF direction). , The arm 1051a of the handle member 1051 by the operating force presses the protruding portion 1052a provided in the vicinity of the pin 1055 as the rotation center of the arm 1052, so that the arm is rotated counterclockwise in FIG. As the pin 1055 is rotated, the engagement portion of the arm 1052 is lifted up to the position of the engagement portion 1054a of the operation plate to engage.

Below the power supply terminal 101, a switch member 107 is provided for outputting to the outside the open state of the circuit breaker, that is, the trip state and the contact open / closed state by operating the handle member. The switch member 107 is located below the power supply terminal 101 and between the case 100 and the cover 200 at a position between the substantially L-shaped fixed contact 1032 formed integrally with the power supply terminal 101 and the outer case of the container case 100. It is arranged and fixed so as to be sandwiched between.

The switch member 107 is a type of micro switch that outputs a contact signal when it is pressed by a push button 1072 having a built-in automatic return contact. One end of the switch member 107 is opposed to the push button 1072 and is swingably supported by the switch body. The pressed button operation piece 1071 is integrally formed.

When the switch member 107 is pressed by the push button operation piece 1071, the built-in automatic return contact is driven to output a contact signal.
In addition, a linkage member 106 for transmitting the movement of the opening / closing mechanism 105 to the switch member 107 is provided.

The linkage member 106 is fitted into the case 100 so that one end thereof is the rotation center 106 a and is formed in a substantially L shape. The push button operation piece 1071 is pressed by the rotation to drive the switch member.

Here, the linkage member 106 includes a first contact portion 1061 that contacts the mechanism portion 105 when the opening and closing mechanism portion is opened and closed by operating the handle member 1051, and an overcurrent tripping means 108 due to overcurrent and unbalanced current. The second abutting portion 1062 that abuts on the mechanism portion 105 at the time of opening operation is provided.

The movement trajectory associated with the opening / closing operation due to the operation of the handle member 1051 of the opening / closing mechanism 105 is the same as that of the above-described wiring breaker, and therefore will be described as an alternative in FIG. FIG. 6 substitutes for the figure which accumulated the connection member 106. FIG. The linkage member 106 and the arm portion 1051a of the handle member 1051 of the mechanism portion 105 are disposed so as to contact each other at a hatched portion in the drawing.

In the case of going from the ON state to the OFF state, the arm portion 1051a and the first contact portion 1061 come into contact with each other, and the linkage member 106 is pressed counterclockwise in the drawing with the portion 106a as the center of rotation. At 1063, the push button operation piece 1071 is pressed to drive the switch member 107.
Further, the push button 1072 is constantly applied with an outward force due to the automatic return contact of the switch member 107, and thus the push button operating piece 1071 receives the force toward the outside of the switch member 107.

When the circuit breaker changes from the OFF state to the ON state, the abutting arm portion 1051a and the first abutting portion move in directions away from each other, so that the abutting is eliminated. Due to the restoring force of the push button operation piece 1071, the linkage member 106 rotates clockwise in the figure around the rotation center 106a, and is separated from the switch member, so that the switch member is not pressed.

Next, FIG. 7 shows a movement locus associated with the overcurrent tripping operation of the opening / closing mechanism unit 105.
FIG. 8 shows a view in which the linking member 106 is superimposed on FIG. In tripping by overcurrent tripping or unbalanced current, that is, tripping, the arm 1052 and the operating plate 1054 are disengaged, and the arm rotates counterclockwise in the figure with the pin 1055 as the center of rotation. Thus, the protrusion 1052a provided on the arm also rotates in the same direction, contacts the second contact portion 1062 of the linkage member 106, and the linkage member 106 causes the portion 106a to be the center of rotation by the restoring force of the spring member 1053. As shown in the figure, the switch is rotated counterclockwise, the switch pressing portion 1063 presses the push button operating piece 1071, and the switch member 107 is driven. The first contact portion 1061 of the linkage member 106 does not contact the mechanism portion 105.

As described above, the linkage member 106 is operated by the first contact portion that is in contact with the mechanism portion when the handle member 1051 is opened and closed by the operation of the handle member 1051 and the overcurrent tripping means due to overcurrent and unbalanced current. Is configured to have a second abutting portion that comes into contact with the mechanism portion at the time of opening operation, and switches between two states of the opening / closing operation by the handle and the tripping operation by the overcurrent. It is comprised so that it can transmit to a member.

As described above, the main components of the circuit breaker, such as the switching mechanism and the earth leakage trip device, are arranged inside the power terminal housing and load terminal housing. Since the switch member 107 for outputting the open / closed state of the switch to the outside is disposed in the power terminal accommodating portion or the load terminal accommodating portion, the main components are provided without being affected by the arrangement of the switch member 107 to constitute a circuit breaker. be able to.

Usually, the circuit breaker contact state of the circuit breaker is output to the outside as a circuit breaker A with an auxiliary switch that outputs a contact signal by detecting the opening operation due to overcurrent and the opening operation by operating the handle member. Since there are two circuit breakers B with alarm switches that output contact signals by detecting opening operation due to overcurrent, both circuit breakers A with auxiliary switches and circuit breakers B with alarm switches can be used. Is possible.

In the embodiment, a micro switch is used as a switch member. However, as another switch member, it is possible to output a contact signal to the outside, and it can be arranged in the power supply terminal accommodating portion or the load terminal accommodating portion of the circuit breaker. If it is a thing, a normal pushbutton switch, a toggle switch, etc. may be sufficient.

It is an internal structure figure which shows the ON state of a circuit breaker. It is an internal structure figure which shows the ON state of a circuit breaker. It is an internal structure figure which shows the OFF state of a circuit breaker. It is an internal structure figure which shows the trip state of a circuit breaker. The movement trajectory of the mechanism when the handle member is turned on and off. The figure which piled up the connection member. The movement trajectory of the mechanism during a trip. The figure which piled up the connection member. It is an internal structure figure which shows the ON state in an earth-leakage circuit breaker. It is an internal structure figure which shows the ON state of an earth-leakage circuit breaker. It is an internal structure figure which shows the OFF state of an earth-leakage circuit breaker. It is an internal structure figure which shows the trip state of an earth-leakage circuit breaker. The figure which shows the example of the conventional circuit breaker for wiring. The figure which shows the example of the conventional earth-leakage circuit breaker. The figure which incorporated the alarm switch in the conventional circuit breaker.

Explanation of symbols

100 Case 200 Cover 101 Power terminal 102 Load terminal 103 Contact device 1031 Movable contact 1031a Movable contact 1032 Fixed contact 1032a Fixed contact 105 Opening / closing mechanism 1051 Handle member 1051a Arm part 1051b Handle rotation angle regulating part 1052 Arm 1052a Projecting part 1052b Movable contact Child locking portion 1053 Spring member 1053a Spring member locking portion 1053b Spring member locking portion 1054 Actuating plate 106 Linking member 1061 First contact portion 1062 Second contact portion 1063 Switch pressing portion 107 Switch member 1071 push Button operation piece 1072 Push button 108 Overcurrent tripping means 1080 Bimetal 1080a Mounting portion 1083 Adjustment screw

Claims (2)

The case and cover constitute the body,
One end of the vessel body is provided with a power terminal housing portion provided with a power terminal, and the other end is provided with a load terminal housing portion provided with a load terminal.
In the current path from the power terminal to the load terminal,
A contact device comprising a movable contact provided with a movable contact and a fixed contact provided with a fixed contact opposite to the movable contact;
An opening / closing mechanism comprising a handle member for opening or closing the contact device;
Overcurrent tripping means that acts on the switching mechanism to open the movable contact when overcurrent occurs; and
An opening / closing operation by operating the handle member and an opening operation by an overcurrent, or an opening / closing operation by operating the handle member are arranged on a trajectory where the opening / closing mechanism moves, and comes into contact with the opening / closing mechanism to A linkage member that follows the movement;
A switch member that is driven by the operation of the linkage member and outputs a contact signal;
The circuit breaker according to claim 1, wherein the switch member is disposed in a power terminal accommodating portion or a load terminal accommodating portion. The case and cover constitute the body,
One end of the vessel body is provided with a power terminal housing portion provided with a power terminal, and the other end is provided with a load terminal housing portion provided with a load terminal.
In the current path from the power terminal to the load terminal,
A contact device comprising a movable contact provided with a movable contact and a fixed contact provided with a fixed contact opposite to the movable contact;
An opening / closing mechanism comprising a handle member for opening or closing the contact device;
Overcurrent tripping means that acts on the switching mechanism to open the movable contact when overcurrent occurs; and
An earth leakage trip device that detects an unbalanced current and acts on the switching mechanism to open the contact device;
An opening / closing operation by operating the handle member and an opening operation by overcurrent and unbalanced current, or an opening / closing operation by operating the handle member are arranged on a trajectory where the opening / closing mechanism moves, and abuts the opening / closing mechanism. A linkage member that follows the operation of the opening and closing mechanism;
A switch member that is driven by the operation of the linkage member and outputs a contact signal;
The circuit breaker according to claim 1, wherein the switch member is disposed in a power terminal accommodating portion or a load terminal accommodating portion.

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