Circuit breaker

Abstract

To provide a circuit breaker that can be made further smaller.SOLUTION: A circuit breaker includes: a closing operation mechanism 5 that maintains a conductive path within a housing 2 in a closed state; a first operation mechanism 32 and a second operation mechanism 42 that activate trip operation; and an interlocking member 6 that interlocks the first operation mechanism 32 and the second operation mechanism 42. The first operation mechanism 32 includes: an engagement member that moves between an engagement position of engaging with the closing operation mechanism 5 so as to cause the operation mechanism 5 to maintain the conductive path in a closed state and a disengagement position of disengaging from the closing operation mechanism 5 so as to release the maintenance of the closed state of the conductive path; and positioning biasing means that biases and brings the engagement member to the engaged position. The second operation mechanism 42 includes a movable member that moves between a first position and a second position. The interlocking member 6 is configured to bias and cause the movable member to be located in the first position by the biasing force of the positioning biasing means, and is configured to move the engagement member from the engagement position to the disengagement position as the movable member moves from the first position to the second position.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a circuit breaker. [Background technology]

[0002] Conventionally, circuit breakers having multiple poles and multiple tripping elements have been provided; for example, Patent Document 1 discloses a 2P2E type circuit breaker having two poles and two tripping elements.

[0003] Such a circuit breaker includes a conductive path of one pole, a conductive path of the other pole, and a switching mechanism for opening and closing the conductive path of one pole and the conductive path of the other pole.

[0004] In the conduction path of one pole, the power supply terminal, contact part (fixed contact part and movable contact part that comes into and out of contact with the fixed contact part), tripping device, and load side terminal are connected in that order, and in the conduction path of the other pole, the power supply terminal, tripping device, contact part (fixed contact part and movable contact part that comes into and out of contact with the fixed contact part), and load side terminal are connected in that order.

[0005] One of the tripping devices is configured to act on the switching mechanism to open one contact part and the other contact part when an abnormal current (such as an overcurrent or short-circuit current) flows in the connected electrical circuit, and the other tripping device is also configured to act on the switching mechanism to open one contact part and the other contact part when an abnormal current flows in the connected electrical circuit.

[0006] Therefore, the circuit breaker is said to be able to open the contacts of both poles when an abnormal current flows in an electric circuit connected to one pole or in an electric circuit connected to the other pole. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Japanese Patent Application Laid-Open No. 2002-56763 Summary of the Invention [Problem to be solved by the invention]

[0008] The inventors of the present invention have conducted extensive research into miniaturizing the above-described conventional circuit breaker.

[0009] In view of the above circumstances, an object of the present invention is to provide a circuit breaker that can be further miniaturized. [Means for solving the problem]

[0010] The circuit breaker of the present invention comprises: a closing operation mechanism that maintains the conductive path in the housing in a closed state; a first operating mechanism that activates a tripping operation that releases the state in which the closing operation mechanism closes the conductive path and opens the conductive path; a second operating mechanism separate from the first operating mechanism that operates the trip operation; an interlocking member that interlocks the first operating mechanism and the second operating mechanism, The first actuation mechanism is an engaging member configured to move between an engaging position where the engaging member engages with the closing operation mechanism so as to maintain the state in which the conductive path of the closing operation mechanism is closed, and a disengaging position where the engaging member disengages from the closing operation mechanism so as to release the closing operation mechanism from maintaining the state in which the conductive path is closed; and a positioning biasing means for biasing the engaging member so that the engaging member is disposed at the engaging position, the second actuation mechanism has a movable member that moves between a first position and a second position; The interlocking member is configured to bias the movable member to the first position by the biasing force of the positioning biasing means, and is configured to move the engaging member from the engaging position to the disengaging position as the movable member moves from the first position to the second position.

[0011] In the circuit breaker having the above configuration, the engaging member of the first operating mechanism and the movable member of the second operating mechanism are configured to be linked by an interlocking member, so that not only the engaging member of the first operating mechanism but also the movable member of the second operating mechanism can be moved by the biasing force of the positioning biasing means, and the movable member of the second operating mechanism can also be positioned in the first position by utilizing the biasing force of the positioning biasing means for positioning the engaging member of the first operating mechanism in the engaged position.

[0012] In this way, the circuit breaker having the above configuration can be made smaller in size by utilizing the biasing force of the positioning biasing means of the first operating mechanism to position the engaging member in the engaged position and enable the movable member to be positioned in the first position.

[0013] In the circuit breaker of the present invention, the first actuation mechanism and the second actuation mechanism are disposed opposite each other with the closing operation mechanism interposed therebetween, The interlocking member may be provided so as to cross the closing operation mechanism in an opposing direction, where the first operating mechanism and the second operating mechanism are opposed to each other.

[0014] In this way, the space required for arranging the interlocking member and the closing operation mechanism can be reduced, thereby making it possible to reduce the size of the circuit breaker.

[0015] In the circuit breaker of the present invention, The second actuation mechanism is an electromagnetic body configured to generate a magnetic force in response to a current flowing through the conductive path; the movable member is configured to move from the first position away from the electromagnetic body to the second position closer to the electromagnetic body. This may be done.

[0016] In this way, the size of the circuit breaker can be reduced by using the interlocking member to urge the movable member toward the first position away from the electromagnetic body using the urging force of the positioning urging means.

[0017] The circuit breaker of the present invention comprises: The second actuation mechanism is an electromagnetic body configured to generate a magnetic force in response to a current flowing through the conductive path; The electromagnetic body is constituted by the movable member. This may be done.

[0018] In this case as well, the size of the circuit breaker can be reduced by interlocking the movable member formed by the electromagnetic body in the second actuation mechanism with the engaging member of the first actuation mechanism.

[0019] In the circuit breaker of the present invention, the interlocking member is configured to be sandwiched between the engaging member and the movable member by the biasing force of the positioning biasing means when the engaging member is disposed at the engaging position and the movable member is disposed at the first position. This may be done.

[0020] In a circuit breaker of the above configuration, it is possible to prevent gaps from forming between the engaging member and the interlocking member, which would cause rattle, and to prevent gaps from forming between the interlocking member and the movable member, which would cause rattle, and it is also possible to prevent abnormal noises and the like from occurring between the engaging member and the interlocking member, and between the interlocking member and the movable member.

[0021] In the circuit breaker of the present invention, a first restraining means for restraining the engaging member and the interlocking member so that the engaging member and the interlocking member do not move relative to each other in the direction in which the engaging member moves; This may be done.

[0022] This makes it easier to prevent a gap from being formed between the engaging member and the interlocking member.

[0023] In the circuit breaker of the present invention, a second restraining means for restraining the movable member and the interlocking member so that the movable member and the interlocking member do not move relative to each other in the direction of movement of the movable member; This may be done.

[0024] This makes it easier to prevent a gap from being formed between the movable member and the interlocking member.

[0025] In the circuit breaker of the present invention, The second actuation mechanism is an electromagnetic body that becomes an electromagnet when a current flows through the conductive path; and a blocking biasing means in contact with the electromagnetic body, the movable member and the electromagnetic body are disposed opposite each other in a state in which they can be moved toward or away from each other, the movable member is configured to push and operate the interlocking member in accordance with an action of approaching the electromagnetic body to release the engagement between the engaging member and the closing operation mechanism, The blocking biasing means is configured to bias the electromagnetic body in a direction approaching the movable member. This may be done.

[0026] In this way, in the second operating mechanism, the movement of the second movable member from the first position toward the second position is assisted by the second blocking biasing means, making it easier for the second movable member to interlock with the interlocking member and the first movable member. [Effects of the Invention]

[0027] As described above, the circuit breaker of the present invention can achieve the excellent effect of being further miniaturized. [Brief explanation of the drawings]

[0028] [Figure 1] FIG. 1 is a perspective view of a circuit breaker according to one embodiment of the present invention. [Figure 2] FIG. 2(a) is a view of the circuit breaker as seen from one of its outer surfaces, and FIG. 2(b) is a view of the circuit breaker as seen from the front side. [Figure 3] FIG. 3 is an exploded perspective view of the circuit breaker according to the embodiment. [Figure 4] FIG. 4 is an explanatory diagram of the circuit breaker according to the embodiment with one exterior body removed. [Figure 5] FIG. 5 is an explanatory diagram of the circuit breaker according to the embodiment with the other exterior body removed. [Figure 6] FIG. 6 is an explanatory diagram of the state immediately after the conduction path of the circuit breaker according to the embodiment is interrupted. [Figure 7] FIG. 7 is an explanatory diagram of a state in which the handle is rotated after the circuit breaker according to the embodiment has been opened. [Figure 8] FIG. 8 is an explanatory diagram of a circuit breaker according to another embodiment of the present invention, illustrating a structure in which the engaging member of the first operating mechanism and the electromagnetic body of the second operating mechanism are interlocked by an interlocking member. [Figure 9] FIG. 9 is an explanatory diagram of the state immediately after the conduction path of the circuit breaker according to the embodiment is interrupted. [Figure 10] FIG. 10 is an explanatory diagram of a circuit breaker according to another embodiment of the present invention, illustrating a structure in which the engaging member of the first operating mechanism and the rotating body of the second operating mechanism are held by an interlocking member. [Figure 11] FIG. 11 is an explanatory diagram of a state immediately after the conduction path of the circuit breaker according to the embodiment is interrupted. [Figure 12] FIG. 12 is an explanatory diagram of a circuit breaker according to another embodiment of the present invention, illustrating a structure in which the engaging member of the first operating mechanism and the electromagnetic body of the second operating mechanism are held by an interlocking member. [Figure 13] FIG. 13 is an explanatory diagram of a state immediately after the conduction path of the circuit breaker according to the embodiment is interrupted. DETAILED DESCRIPTION OF THE INVENTION

[0029] Hereinafter, a circuit breaker according to an embodiment of the present invention will be described with reference to the accompanying drawings.

[0030] A circuit breaker is connected to an electric circuit and is configured to interrupt the flow of electric current by opening the electric circuit when an overcurrent flows through the electric circuit.

[0031] The circuit breaker of this embodiment is a so-called 2P2E type circuit breaker, which has two circuits (pole) that can be opened and closed simultaneously and also has two tripping elements for switching the circuits from a closed state to an open state.

[0032] The circuit breaker 1 comprises a housing 2, as shown in Figures 1, 2(a), and 2(b), a first conductive path 3 constituting one of two poles, as shown in Figure 3, a second conductive path 4 constituting the other of the two poles, a closing operation mechanism 5 for maintaining the first conductive path 3 and the second conductive path 4 in a closed state, and an interlocking member 6 for interlocking a first engaging member 322 (described later) of the first conductive path 3 with a second movable member 422 (described later) of the second conductive path 4.

[0033] The housing 2 has a pair of exterior bodies 20 that are combined in a butted state, and an insulating wall 21 for insulating the first conductive path 3 and the second conductive path 4 between the pair of exterior bodies 20.

[0034] The pair of exterior bodies 20 have a back surface 200 (see Figure 2(a)) that is arranged facing the installation surface, a front surface 201 (see Figure 2(b)) that faces the opposite side from the back surface 200, an inner surface 202 that forms the inner wall surface of the housing 2, and an outer surface 203 that forms the outer wall surface of the housing 2.

[0035] In the description of the circuit breaker 1 of this embodiment, the direction in which the pair of exterior bodies 20 are combined (butted together) is referred to as the width direction, the direction in which the rear surface 200 and the front surface 201 of the exterior bodies 20 are aligned is referred to as the height direction, and the direction perpendicular to the width direction and the height direction is referred to as the orthogonal direction. In addition, the direction from the rear surface 200 toward the front surface 201 of the housing 2 in the height direction is referred to as the upward direction, and the direction from the front surface 201 toward the rear surface 200 of the housing 2 in the height direction is referred to as the downward direction.

[0036] The terms "upper" and "lower" are used for convenience, and the circuit breaker 1 may be installed with the front surface 201 facing horizontally.

[0037] The insulating wall 21 has a one-side insulating wall 210 that provides insulation between a first one-side terminal portion 300 of the first conductive path 3, which will be described later, and a second other-side terminal portion 401 of the second conductive path 4, which will be described later, and an other-side insulating wall 211 that provides insulation between the first other-side terminal portion 301 of the first conductive path 3, which will be described later, and a second one-side terminal portion 400 of the second conductive path 4, which will be described later.

[0038] One insulating wall 210 is formed integrally with one of the exterior bodies 20 (the exterior body 20 shown at the back of the paper in Figure 3), but the other insulating wall 211 is separate from each of the pair of exterior bodies 20.

[0039] In the following description, the components included in the first conductive path 3 will be referred to as "first."

[0040] As shown in Figure 4, the first conductive path 3 has a first terminal portion 30 to which an external electrical path is electrically connected, a first opening / closing portion 31 electrically connected to the first terminal portion 30 and configured to open and close, and a first operating mechanism 32 that activates a tripping operation to switch the first conductive path 3 and the second conductive path 4 from a closed state to an open state depending on the current flowing through the first conductive path 3.

[0041] The first terminal portion 30 has a first one terminal portion 300 and a first other terminal portion 301 that respectively constitute separate end portions of the first conductive path 3 .

[0042] The first first terminal portion 300 has a first first terminal body 3000 to which an electric circuit can be electrically connected from outside the housing 2, and a first first conductor portion 3001 electrically connected to the first first terminal body 3000.

[0043] The first one terminal portion 300 is disposed on one side of the housing 2 in the orthogonal direction.

[0044] The first other terminal portion 301 has a first other terminal main body 3010 to which an electric path can be electrically connected from outside the housing 2.

[0045] The first other terminal portion 301 is disposed on the other side of the housing 2 in the orthogonal direction. In addition, the first other terminal body 3010 of this embodiment is directly attached to a first fixed conductive plate of a first fixed contact portion, which will be described later, and is thereby electrically connected to the first fixed conductive plate.

[0046] The first opening / closing portion 31 has a first contact portion electrically connected to the first one terminal portion 300 and a first contact portion electrically connected to the first other terminal portion 301 .

[0047] The first contact portion electrically connected to the first other terminal portion 301 is fixed within the housing 2 so that its position does not change, and is hereinafter referred to as the first fixed contact portion 310.

[0048] The first contact portion electrically connected to the first one terminal portion 300 is arranged within the housing 2 in a state in which it can be brought into contact with and separated from the first fixed contact portion 310, and will hereinafter be referred to as the first movable contact portion 311.

[0049] The first fixed contact portion 310 has a first fixed conductive plate 3100 electrically connected to the first other terminal body 3010, and a first fixed contact 3101 attached to the first fixed conductive plate 3100.

[0050] In this embodiment, the first fixed contact 3101 is configured such that the first fixed conductive plate 3100 is fixed so that its position within the housing 2 does not change, and the position of the first fixed contact 3101 also does not change.

[0051] The first movable contact portion 311 has a first movable conductive plate 3110 configured to move within the housing 2, a first movable contact 3111 attached to the first movable conductive plate 3110, and a first base 3112 that is fixed in the housing 2 so that its position does not change and to which the first movable conductive plate 3110 is attached.

[0052] The first movable conductive plate 3110 is formed in a long, thin plate shape and has elasticity. Furthermore, since one end in the longitudinal direction of the first movable conductive plate 3110 is attached to the first base 3112, the first movable conductive plate 3110 is configured so that when subjected to a downward external force, the other end side bends more than the one end side, and returns to its original shape when the external force is removed.

[0053] The first movable contact 3111 is attached to the other end in the longitudinal direction of the first movable conductive plate 3110. The other end of the first movable conductive plate 3110 is disposed at a position offset upward from the first fixed conductive plate 3100 and facing the first fixed conductive plate 3100, and the first movable contact is disposed at a position facing the first fixed contact 3101 in the height direction.

[0054] The first movable contact 3111 is configured to be away from the first fixed contact 3101 when the first movable conductive plate 3110 is not bent toward the first fixed conductive plate 3100, and to begin to approach the first fixed contact 3101 when the first movable conductive plate 3110 begins to bend toward the first fixed conductive plate 3100, and to come into contact with the first fixed contact 3101 as the first movable conductive plate 3110 continues to bend.

[0055] The first movable contact 3111 begins to move away from the first fixed contact 3101 when the first movable conductive plate 3110 begins to return to its original state from its bent shape, and is configured to remain separated from the first fixed contact 3101 even when the first movable conductive plate 3110 has returned to its original shape.

[0056] In this way, the first opening / closing unit 31 is configured to close the first conductive path 3 by bringing the first movable contact 3111 into contact with the first fixed contact 3101, and to open the first conductive path 3 by separating the first movable contact 3111 from the first fixed contact 3101.

[0057] The first base 3112 is electrically connected to a first bimetal 320 (described later) of the first operating mechanism 32. Since the first one conductive portion is electrically connected to this first bimetal 320, the first base 3112 is electrically connected to the first one conductive portion via the first bimetal 320.

[0058] The first operating mechanism 32 has a first bimetal 320 electrically connected to the first one conductor portion 3001 of the first terminal portion 30 and the first base 3112 of the first movable terminal portion; a first electromagnetic body 321 configured to generate a magnetic force when receiving a current flowing through the first conductive path 3 (i.e., to become an electromagnet when receiving a current flowing through the first conductive path 3); a first engagement member 322 configured to move between an engagement position in which it engages with the closing operation mechanism 5 to maintain the state in which the first conductive path 3 of the closing operation mechanism 5 is closed and the second conductive path 4 is closed, and a disengagement position in which it is disengaged from the closing operation mechanism 5 to release the maintenance of the state in which the closing operation mechanism 5 is closed and the second conductive path 4 is closed; and a first positioning biasing means 323 for maintaining the first engagement member 322 in the engagement position.

[0059] The first bimetal 320 is formed in a plate shape. One end of the first bimetal 320 in the longitudinal direction is electrically connected to the first base 3112.

[0060] Furthermore, when the current flowing through the first conductive path 3 exceeds a predetermined value, the first bimetal 320 bends so that the other end side in the longitudinal direction moves in a direction perpendicular to the longitudinal direction (the thickness direction of the first bimetal 320, which corresponds to the direction in which the first engaging member 322 moves from the engaged position toward the disengaged position).

[0061] The first electromagnetic body 321 has a first frame portion 3210 formed in a U-shape, and a first frame holding portion 3211 formed on the first frame portion 3210, which is held on the housing 2 in a state where it can rotate around an axis extending in the width direction.

[0062] The first frame portion 3210 is disposed so as to open toward the first engagement member 322 .

[0063] A through-hole penetrating in the width direction is formed in the first frame portion 3210, and the first extending shaft portion 22 extending along the width direction from the inner wall surface of the housing 2 is inserted into this through-hole. Therefore, the first frame holding portion 3211 of this embodiment is configured by an inner circumferential surface that defines the through-hole.

[0064] Furthermore, the first frame holding portion 3211 is formed on the upper end side of the first frame portion 3210 in the height direction. Therefore, when the first frame portion 3210 rotates around the first frame holding portion 3211, the position of the lower end of the first frame portion 3210 in the perpendicular direction changes.

[0065] Here, the first positioning biasing means 323 is configured to bias the back surface 200 of the first electromagnetic body 321 toward the first engaging member 322 at a position below the second frame holding portion. As a result, the lower end of the first electromagnetic body 321 is in a state where it is positioned closer to the first engaging member 322 than the upper end.

[0066] The first engagement member 322 has a first base portion 3220 that is held on the housing 2 in a state where it can rotate around an axis extending in the width direction, a first engagement main body portion 3221 that extends upward from the first base portion 3220 and is engageable with the first operating mechanism 32, and a first push operation portion 3222 that is connected to the upper end of the first engagement main body portion 3221 and is pushed and operated by the first bimetal 320.

[0067] The first base portion 3220 is formed to extend outward in the width direction more than the first engaging main body portion 3221, and one end portion in the width direction is rotatably held by one outer body 20, and the other end portion in the width direction is rotatably held by the other outer body 20.

[0068] The first engagement main body portion 3221 is formed in a plate shape, and is disposed so that one plate surface faces the first frame portion 3210. In addition, the lower end side of this one plate surface is pressed by the lower end portion of the first frame portion 3210.

[0069] In addition, when the first engagement main body portion 3221 is switched to a state in which the first engagement member 322 is positioned in the engagement position, the other plate surface of the first engagement main body portion 3221 is configured to abut against the first extension restriction portion 23 extending from the inner wall surface of the housing 2.

[0070] Therefore, the first engaging member 322 is configured to be positioned at the engaging position by the first positioning biasing means 323, the first frame portion 3210, and the first extension restricting portion 23.

[0071] The first engaging main body portion 3221 is configured so that its lower end is constantly pressed by the lower end of the first frame portion 3210, and when no overcurrent is flowing through either the first conductive path 3 or the second conductive path 4, it is not subjected to any external force directed toward the first frame portion 3210, and therefore remains in the engaged position.

[0072] On the other hand, when an overcurrent flows in the first conductive path 3 or the second conductive path 4, the first engaging main body portion 3221 receives an external force directed toward the first frame portion 3210, causing it to rotate (tilt) toward the first frame portion 3210 and move from the engaged position to the disengaged position, but when the external force is removed, it is pushed by the lower end of the first frame portion 3210 and returns to the engaged position.

[0073] In this way, the first operating mechanism 32 is configured to be able to position the first engaging member 322 in the engaging position by utilizing the biasing force of the first positioning biasing means 323, and the first engaging member 322 is configured to set the engaging position as the initial position when the circuit breaker 1 is in use, and then move to the disengaging position by rotating (tilting) in a direction approaching the first electromagnetic body 321.

[0074] The first engagement main body portion 3221 of this embodiment has a first engagement receiving portion 3223 that can receive the closing operation mechanism 5 from below.

[0075] The first engagement main body portion 3221 has a through hole formed therein that penetrates in a direction perpendicular to the plate surface, and the first engagement receiving portion 3223 in this embodiment is formed by an upwardly facing area of ​​the inner surface that defines the through hole.

[0076] The first engagement receiving portion 3223 is in a state in which the closing operation mechanism 5 can engage when the first engagement member 322 is positioned in the engagement position, and the engagement of the closing operation mechanism 5 is released when the first engagement member 322 moves from the engagement position to the disengagement position.

[0077] In the following description, the components included in the second conductive path 4 will be referred to as "second."

[0078] As shown in Figure 5, the second conductive path 4 has a second terminal portion 40 to which an external electrical path is electrically connected, a second opening / closing portion 41 electrically connected to the second terminal portion 40 and configured to open and close, and a second operating mechanism 42 that activates a tripping operation to switch the first conductive path 3 and the second conductive path 4 from a closed state to an open state depending on the current flowing through the second conductive path 4.

[0079] The second terminal portion 40 has a second one terminal portion 400 and a second other terminal portion 401 that respectively constitute separate end portions of the second conductive path 4 .

[0080] The second one terminal portion 400 has a second one connection portion 4000 that can electrically connect an electrical circuit from outside the housing 2, and a second one conductive portion 4001 that is electrically connected to the second one connection portion 4000.

[0081] The second one terminal portion 400 is disposed on the other side of the housing 2 in the orthogonal direction.

[0082] The second other terminal portion 401 has a second other connection portion 4010 that can electrically connect an electrical circuit from outside the housing 2, and a second other conductive portion 4011 that is electrically connected to the second other connection portion 4010.

[0083] The second other terminal portion 401 is disposed on one side of the housing 2 in the orthogonal direction.

[0084] The second opening / closing portion 41 has a second contact portion electrically connected to the second one terminal portion 400 and a second contact portion electrically connected to the second other terminal portion 401 .

[0085] The second contact portion electrically connected to the second other terminal portion 401 is fixed within the housing 2 so that its position does not change, and is hereinafter referred to as the second fixed contact portion 410.

[0086] The second contact portion electrically connected to the second one-side terminal portion 400 is arranged within the housing 2 in a state in which it can be brought into contact with and separated from the second fixed contact portion 410, and will hereinafter be referred to as the second movable contact portion 411.

[0087] The second fixed contact portion 410 has a second fixed conductive plate 4100 electrically connected to the second other connection portion 4010, and a second fixed contact 4101 attached to the second fixed conductive plate 4100.

[0088] The second movable contact portion 411 has a second movable conductive plate 4110 configured to move within the housing 2, and a second movable contact 4111 attached to the second movable conductive plate 4110.

[0089] The second movable conductive plate 4110 is conductive.

[0090] The second movable conductive plate 4110 is formed in a long, thin plate shape and has elasticity. In addition, since one end in the longitudinal direction of the second movable conductive plate 4110 is fixed inside the housing 2, the second movable conductive plate 4110 is configured so that when it receives an external force acting in a downward direction, the other end side bends more than the one end side, and returns to its original shape when the external force is removed.

[0091] The second movable contact 4111 is attached to the other end in the longitudinal direction of the second movable conductive plate 4110. The other end of the second movable conductive plate 4110 is disposed at a position above the second fixed conductive plate 4100 and facing the second fixed conductive plate 4100, and the second movable contact 4111 is disposed at a position facing the second fixed contact 4101 in the height direction.

[0092] The second movable contact 4111 is configured to be separated from the second fixed contact 4101 when the second movable conductive plate 4110 is not bent toward the second fixed conductive plate 4100, and to begin to approach the second fixed contact 4101 when the second movable conductive plate 4110 begins to bend toward the second fixed conductive plate 4100 due to an external force, and to come into contact with the second fixed contact 4101 as the second movable conductive plate 4110 continues to bend.

[0093] The second movable contact 4111 is configured to begin to move away from the second fixed contact 4101 when the second movable conductive plate 4110 begins to return to its original state from its bent state, and to be separated from the second fixed contact 4101 when the second movable conductive plate 4110 has returned to its original state.

[0094] In this way, the second opening / closing unit 41 is configured to close the second conductive path 4 by bringing the second movable contact 4111 into contact with the second fixed contact 4101, and to open the second conductive path 4 by separating the second movable contact 4111 from the second fixed contact 4101.

[0095] The second operating mechanism 42 has a second bimetal 420 electrically connected to the second one conductor portion of the second terminal portion 40 and the second base of the second movable terminal portion, a second electromagnetic body 421 configured to generate a magnetic force when receiving a current flowing through the second conductive path 4 (i.e., to become an electromagnet when receiving a current flowing through the second conductive path 4), a second rotating body 422 arranged opposite the second electromagnetic body 421 in the perpendicular direction and configured to move in a direction toward and away from the second electromagnetic body 421, and a second interrupting biasing means 423 that biases the second electromagnetic body 421 toward the second rotating body 422.

[0096] The second bimetal 420 is formed in a plate shape. One end of the second bimetal 420 in the longitudinal direction is directly connected to the second fixed conductive plate 4100, and is thereby electrically connected to the second fixed conductive plate 4100.

[0097] Furthermore, when the current flowing through the second conductive path 4 exceeds a predetermined value, the second bimetal 420 bends so that the other end side in the longitudinal direction moves in a direction perpendicular to the longitudinal direction (the thickness direction of the second bimetal 420, which corresponds to the direction in which the second rotating body 422 moves from the first position toward the second position described below).

[0098] The second electromagnetic body 421 has a second frame portion 4210 formed in a U-shape, and a second frame holding portion 4211 formed on the second frame portion 4210, which is held on the housing 2 in a state where it can rotate around an axis extending in the width direction.

[0099] The second frame portion 4210 is disposed so as to open toward the second rotor 422 .

[0100] The second frame holding portion 4211 in this embodiment extends upward from the second frame portion 4210. A second extension restricting portion 24 (see FIG. 5 ) extending from the inner surface 202 of the exterior body 20 is interposed between the second frame holding portion 4211 and the second contact / separation member, and the second frame holding portion 4211 comes into contact with this second extension restricting portion 24, thereby restricting movement of the second frame holding portion 4211 toward the second rotating body 422.

[0101] Furthermore, since the second frame holding portion 4211 is located higher in the height direction than the second frame portion 4210, when the second frame portion 4210 rotates around the second frame holding portion 4211, the position of the lower end portion of the second frame portion 4210 in the perpendicular direction changes.

[0102] Here, the second blocking biasing means 423 is configured to bias the back surface 200 of the second electromagnetic body 421 toward the second rotating body 422 at a position below the second frame holding portion 4211. As a result, the lower end of the second electromagnetic body 421 is in a state in which it is positioned closer to the second rotating body 422 than the upper end.

[0103] The second rotating body 422 is a second movable member 422 configured to move between a first position in which it is placed by being pushed via the interlocking member 6 against the first engaging member 322, which is placed in the engaged position, and a second position in which it can be placed in a disengaged position by pushing the first engaging member 322 via the interlocking member 6.

[0104] In the description of the circuit breaker 1 of this embodiment, the second rotor 422 will be referred to as the second movable member 422 hereinafter.

[0105] The second movable member 422 has a second base portion 4220 that is held in the housing 2 in a state where it can rotate around an axis extending in the width direction, and a second movable main body portion 4221 that extends upward from the second base portion 4220.

[0106] The second base portion 4220 is formed to extend outward in the width direction more than the second movable main body portion 4221, and one end portion in the width direction is rotatably held by one outer body 20, and the other end portion in the width direction is rotatably held by the other outer body 20.

[0107] The second movable main body portion 4221 is formed in a plate shape, and is disposed so that one plate surface faces the second frame portion 4210. The lower end of this one plate surface abuts against the lower end of the second frame portion 4210, and the upper end abuts against the interlocking member 6.

[0108] Therefore, when the interlocking member 6 is pushed by the first positioning biasing means 323, the first electromagnetic body 321, and the first engaging member 322 and moves to the other side in the perpendicular direction, the second movable main body part 4221 is pushed by the interlocking member 6, causing the second movable member 422 to be positioned in the first position.

[0109] In this way, the first position of the second movable member 422 in this embodiment is set to a position where the second movable member 422 stops moving when the first engagement member 322 is placed in the engagement position and the other plate surface of the first engagement main body portion 3221 abuts against the first extension restricting portion 23.

[0110] The second movable member 422 is configured so that its upper end is constantly pressed by the interlocking member 6, and when no overcurrent is flowing through either the first conductive path 3 or the second conductive path 4, the upper end continues to be pressed by the interlocking member 6, and therefore it is maintained in the first position (i.e., positioned in the first position) using the biasing force of the first positioning biasing means 323.

[0111] On the other hand, when an overcurrent flows through the first conductive path 3 or the second conductive path 4, the second movable member 422 receives an external force directed toward the second frame portion 4210, causing it to rotate (tilt) toward the second frame portion 4210 and move from the first position to the second position, but is configured to be pushed by the interlocking member 6 and return to the first position when the external force is removed.

[0112] In this way, the second operating mechanism 42 is configured to be able to position the second movable member 422 at the first position by utilizing the biasing force of the first positioning biasing means 323, and is configured to move to the second position by rotating (tilting) in a direction approaching the second electromagnetic body 421, after setting the first position as the initial position when the circuit breaker 1 is in use.

[0113] Furthermore, in the second operating mechanism 42, the movement of the second base 4220 toward the second electromagnetic body 421 is restricted by the biasing force of the second blocking biasing means 423, so the second movable main body 4221 is more likely to move toward the second electromagnetic body 421 (the second movable member 422 is more likely to move from the first position toward the second position).

[0114] The closing operation mechanism 5 has a crossbar 50 arranged within the housing 2 in a state where it can be reciprocated in the vertical direction, a push-up biasing means 51 that biases the crossbar 50 upward, a pressing member 52 that abuts against the crossbar 50 from above, and a pressing operation part 53 for moving the pressing member 52 downward.

[0115] The crossbar 50 has a first pressing portion 500 (see Figure 4) configured to press the upper surface of the first movable conductive plate 3110 downward as it moves downward, and a second pressing portion 501 (see Figure 5) configured to press the upper surface of the second movable conductive plate 4110 downward as it moves downward.

[0116] The push-up biasing means 51 is arranged closer to the rear surface 200 of the housing 2 than the crossbar 50, and is configured to bias the bottom surface of the crossbar 50 upward.

[0117] The pressing member 52 has a pressing plate 520 that contacts the crossbar 50 from above, and an operated portion 521 that is pressed downward by the pressing operation portion 53.

[0118] The pressing plate 520 is formed in the shape of a long, thin plate.

[0119] One end of the pressing plate 520 in the longitudinal direction is configured so as to be able to be placed above the first engagement receiving portion 3223. The other end of the pressing plate 520 in the longitudinal direction is configured so as to be able to abut against the cross bar 50 from above.

[0120] The pressing operation unit 53 has a handle 530 configured to be rotatable relative to the housing 2, and a link 531 connected to the handle 530 and the operated unit 521.

[0121] The connection position of the link 531 with the operated portion 521 is set at a position shifted toward one end of the pressure plate 520 from the contact position between the pressure plate 520 and the cross bar 50 .

[0122] In this embodiment, the pressing operation unit 53 is configured so that when rotated to one side, it can move the crossbar 50 downward together with the pressing plate 520, and rotates to the other side as the crossbar 50 moves upward together with the pressing plate 520.

[0123] In the circuit breaker 1, the first operating mechanism 32 and the second operating mechanism 42 are arranged opposite to each other via the interlocking member 6. Therefore, the interlocking member 6 is arranged between the first operating mechanism 32 and the second operating mechanism 42.

[0124] The interlocking member 6 of this embodiment has an engaging side abutment portion 60 that abuts against the first engaging member 322 from the inside in the perpendicular direction, a movable side abutment portion 61 that abuts against the second movable member 422 from the inside in the perpendicular direction, and a contact-separation abutment portion 62 with which the second bimetal 420 can abut from the inside in the perpendicular direction.

[0125] The tip of the engagement side abutment portion 60 in the orthogonal direction has a rounded shape so that the width in the height direction decreases toward the tip. Therefore, even when the tip of the engagement side abutment portion 60 and the first engagement main body portion 3221 are in contact with each other, the movement of the engagement side abutment portion 60 and the first engagement main body portion 3221 is smooth.

[0126] The tip of the movable-side contact portion 61 in the orthogonal direction has a rounded shape so that the width in the height direction decreases toward the tip. Therefore, even when the tip of the movable-side contact portion 61 and the second movable main body portion 4221 are in contact with each other, the movement of the movable-side contact portion 61 and the second movable main body portion 4221 is smooth.

[0127] The tip of the contact-separation abutment portion 62 in the orthogonal direction has a rounded shape so that the width in the height direction decreases toward the tip. Therefore, even when the tip of the contact-separation abutment portion 62 and the second bimetal 420 are in contact with each other, the movement of the contact-separation abutment portion 62 and the second bimetal 420 is smooth.

[0128] The configuration of the circuit breaker 1 according to this embodiment is as described above. Next, the operation of the circuit breaker 1 will be described.

[0129] When the circuit breaker 1 is in the open state and is not receiving an overcurrent, the first engaging member 322 is placed in the engaged position by the biasing force of the first positioning biasing means 323, and the second movable member 422 is placed in the first position.

[0130] In the first operating mechanism 32, the lower end of the first electromagnetic body 321 is urged toward the first engaging member 322 by the first positioning urging means 323, and further, the lower end side of the first engaging member 322 is pushed by the first electromagnetic body 321, thereby placing the first engaging member 322 in the engaged position (see Figure 4).

[0131] Furthermore, in the second operating mechanism 42, when the first engaging member 322 is positioned in the engaged position, the interlocking member 6 is pushed toward the second operating mechanism 42 by the first engaging member 322, and therefore, in the second operating mechanism 42, the second movable member 422 is pushed by the interlocking member 6 and positioned in the first position (see Figure 5).

[0132] In this state, when the handle 530 is rotated to one side, one end of the pressure plate 520 is positioned overlapping the first engagement receiving portion 3223, and the crossbar 50 is pushed downward by the pressure plate 520, and when the first movable contact 3111 abuts against the first fixed contact 3101, the first conductive path 3 is closed, and when the second movable contact 4111 abuts against the second fixed contact 4101, the second conductive path 4 is closed.

[0133] Furthermore, when the pressure plate 520 engages with the first engagement receiving portion 3223, the pressure plate 520 maintains the state of pressing the crossbar 50 downward, and therefore the closed state of the first conductive path 3 and the closed state of the second conductive path 4 are also maintained.

[0134] When an overcurrent flows through the first conductive path 3, the first engaging member 322 rotates toward the first electromagnetic body 321 due to the magnetic force generated in the first electromagnetic body 321, or rotates toward the first electromagnetic body 321 due to being pushed by the first bimetal 320.

[0135] When the first engagement member 322 moves to the disengagement position, the engagement between the first engagement member 322 and the presser plate 520 is released, and the first movable contact 3111 and the second movable contact 4111 move upward together with the crossbar 50.

[0136] As a result, when the first movable contact 3111 moves away from the first fixed contact 3101, the first conductive path 3 opens, and when the second movable contact 4111 moves away from the second fixed contact 4101, the second conductive path 4 opens (see Figure 6), and the handle 530 returns to the state it was in before operation (see Figure 7).

[0137] When an overcurrent flows through the second conductive path 4, the second movable member 422 rotates toward the second electromagnetic body 421 due to the magnetic force generated in the second electromagnetic body 421, or rotates toward the second electromagnetic body 421 due to being pushed by the second bimetal 420.

[0138] As the second movable member 422 moves from the first position toward the second position, it pushes the interlocking member 6 toward the first engagement member 322 side.

[0139] When the first engagement member 322 is pushed by the interlocking member 6 and moves from the engagement position to the disengagement position, the engagement between the first engagement member 322 and the pressure plate 520 is released, and the first movable contact 3111 and the second movable contact 4111 move upward together with the crossbar 50.

[0140] As a result, when the first movable contact 3111 moves away from the first fixed contact 3101, the first conductive path 3 opens, and when the second movable contact 4111 moves away from the second fixed contact 4101, the second conductive path 4 opens (see Figure 6), and the handle 530 returns to the state it was in before operation (see Figure 7).

[0141] As described above, according to the circuit breaker 1 of this embodiment, the first engaging member 322 of the first operating mechanism 32 and the second movable member 422 of the second operating mechanism 42 are configured to be linked by the biasing force of the first positioning biasing means 323, and therefore the second movable member 422 of the second operating mechanism 42 can also be positioned at the first position by utilizing the biasing force of the first positioning biasing means 323 for positioning the first engaging member 322 of the first operating mechanism 32 at the engaged position.

[0142] In this way, the circuit breaker 1 can achieve the excellent effect of further reducing the size of the circuit breaker 1 by utilizing the biasing force of the first positioning biasing means 323 of the first operating mechanism 32 to position the first engaging member 322 in the engaging position and allowing the second movable member 422 to be positioned in the first position.

[0143] Furthermore, the first operating mechanism 32 and the second operating mechanism 42 are arranged opposite each other via the closing operation mechanism 5, and the interlocking member 6 is arranged to cross the closing operation mechanism 5 in the opposing direction in which the first operating mechanism 32 and the second operating mechanism 42 face each other. Therefore, the size of the circuit breaker 1 can be reduced by reducing the space required to arrange the interlocking member 6 and the closing operation mechanism 5.

[0144] Furthermore, the second operating mechanism 42 is configured so that the interlocking member 6 can use the biasing force of the first positioning biasing means 323 to bias the second movable member 422 toward a first position away from the second electromagnetic body 421, and therefore the size of the circuit breaker 1 can be reduced by using the interlocking member 6 to use the biasing force of the first positioning biasing means 323 to bias the second movable member 422 toward the first position away from the second electromagnetic body 421.

[0145] Furthermore, in the circuit breaker 1 of this embodiment, when the first engagement member 322 is in the engagement position and the second movable member 422 is in the first position, the interlocking member 6 is configured to be sandwiched between the first engagement member 322 and the second movable member 422 by the biasing force of the first positioning biasing means 323.This prevents a gap from forming between the first engagement member 322 and the interlocking member 6, which would cause rattle, and prevents a gap from forming between the interlocking member and the second movable member 422, which would cause rattle.This also prevents abnormal noise and the like from occurring between the first engagement member 322 and the interlocking member 6, and between the interlocking member 6 and the second movable member 422.

[0146] Furthermore, when the first engagement member 322 is switched to a state in which it is positioned in the engagement position, the other plate surface is configured to abut against the first extension restriction portion 23 extending from the inner wall surface of the housing 2, so that movement in a direction away from the first electromagnetic body 321 beyond the engagement position is restricted, thereby further reducing rattling.

[0147] When the second movable member 422 is switched to a state in which it is positioned in the first position, the other plate surface is configured to abut against the second extension restricting portion 24 extending from the inner wall surface of the housing 2, so that movement in a direction away from the second electromagnetic body 421 beyond the first position is restricted, thereby further reducing rattling.

[0148] Furthermore, in the circuit breaker 1 of this embodiment, the movement of the second movable member 422 from the first position toward the second position is assisted by the second breaking biasing means 423, making it easier for the second movable member 422 to interlock with the interlocking member 6 and the first movable member.

[0149] The circuit breaker 1 according to the present invention is not limited to the above embodiment, and it goes without saying that various modifications can be made without departing from the gist of the present invention.

[0150] In the second actuation mechanism 42 of the circuit breaker 1 of the above embodiment, the second rotating body 422 is configured as the second movable member 422, but this configuration is not limiting. The second movable member 422 may be configured by a second electromagnetic body 421, for example, as shown in Figures 8 and 9.

[0151] In this case as well, by linking second movable member 422 formed by second electromagnetic body 421 and first engaging member 322 with linking member 6, the size of circuit breaker 1 can be reduced.

[0152] Although not specifically mentioned in the description of the interlocking member 6 in the above embodiment, as shown in Figures 10 and 11, the interlocking member 6 may be configured to have a first restraining means 7 that restrains the first engaging member 322 and the interlocking member 6 so that they do not move relatively in the direction in which the first engaging member 322 moves, and a second restraining means 8 that restrains the second movable member 422 and the interlocking member 6 so that they do not move relatively in the direction in which the second movable member 422 moves.

[0153] In this way, it becomes easier to prevent a gap from being formed between the first engaging member 322 and the interlocking member 6, thereby reducing the occurrence of abnormal noise, etc., and also by preventing a gap from being formed between the second movable member 422 and the interlocking member 6, it becomes possible to reduce the occurrence of abnormal noise, etc.

[0154] The first restraining means 7 abuts against the first engaging member 322 while being arranged at a position aligned with the engaging-side abutment portion 60 via the first engaging member 322. The first restraining means 7 is configured to abut against the first engaging member 322 from the outside in the perpendicular direction. Therefore, the first restraining means 7 restricts movement of the first engaging member 322 in a direction away from the first engaging member 322.

[0155] One end of the first restraining means 7 (the end arranged facing the first engaging member 322) has a rounded shape such that the width in the height direction decreases toward the first engaging member 322. Therefore, even when the one end of the first restraining means 7 and the first engaging member 322 are in contact with each other, the first restraining means 7 and the first engaging member 322 move smoothly.

[0156] The second restraining means 8 abuts against the first engaging member 322 while being arranged at a position aligned with the movable-side abutment portion 61 via the second movable member 422. The first restraining means 7 is configured to abut against the first engaging member 322 from the outside in the perpendicular direction. Therefore, the first restraining means 7 restricts movement of the first engaging member 322 in a direction away from the first engaging member 322.

[0157] One end of second restraining means 8 (one end arranged facing second movable member 422) has a rounded shape such that the width in the height direction decreases toward second movable member 422. Therefore, even when one end of second restraining means 8 and second movable member 422 are in contact with each other, the movement of second restraining means 8 and second movable member 422 is smooth.

[0158] Furthermore, even when the circuit breaker 1 is configured to include the first restraining means 7 and the second restraining means 8, the second movable member 422 can be configured by the second electromagnetic body 421, as shown in Figures 12 and 13.

[0159] Furthermore, when the circuit breaker 1 is configured to include the first restraining means 7 and the second restraining means 8, the second operating mechanism 42 does not need to include the second breaking biasing means 423.

[0160] Although not specifically mentioned in the description of the interlocking member 6 in the above embodiment, since the first operating mechanism 32 can activate the trip operation by directly operating the closing operation mechanism 5, the interlocking member 6 may be configured to at least link the movement of the second movable member 422 to the movement of the first engagement member 322.

[0161] In the circuit breaker 1, if the interlocking member 6 is configured to at least interlock the movement of the second movable member 422 with the movement of the first engaging member 322, the first conductive path 3 and the second conductive path 4 can be opened whether an overcurrent flows in the first conductive path 3 or in the second conductive path 4.

[0162] In the above embodiment, the first frame holding portion 3211 is configured by a through-hole formed so as to penetrate the first frame portion 3210 in the width direction, but is not limited to this configuration. For example, the first frame holding portion 3211 may be configured by a shaft portion extending outward in the width direction from the first frame portion 3210. In this case, it is sufficient that the shaft portion constituting the first frame holding portion 3211 is rotatably held by the housing 2.

[0163] In the above embodiment, the first base portion 3220 is formed to extend outward in the width direction more than the first engagement main body portion 3221, and the tip portion is rotatably held by the outer casing 20, but this configuration is not limited to this as long as it is attached in a state where it can rotate relative to the outer casing 20.

[0164] In the above embodiment, the second frame holding portion 4211 is configured by an extending portion extending upward from the second frame portion 4210, but is not limited to this configuration as long as it can restrict movement toward the second movable member 422 (second rotating body 422).

[0165] In the above embodiment, the second base portion 4220 is formed to extend outward in the width direction more than the second movable main body portion 4221, and its tip portion is rotatably held by the outer body 20, but this configuration is not limited to this as long as it is attached in a state where it can rotate relative to the outer body 20.

[0166] Although not specifically mentioned in the description of the circuit breaker 1 of the above embodiment, the first bimetal 320 and the second bimetal 420 perform so-called time-delay tripping, and the first electromagnetic body 321 and the second electromagnetic body 421 perform so-called instantaneous tripping.

[0167] The circuit breaker 1 in the above embodiment is configured so that the movement of the second movable member 422 stops as the other plate surface of the first engagement main body portion 3221 abuts against the first extension restricting portion 23, but is not limited to this configuration. For example, the circuit breaker 1 may be configured so that a second extension receiving portion is formed on the housing 2, extending from the inner wall surface, and the other plate surface of the second movable main body portion 4221 abuts against the second extension receiving portion when the second movable member 422 is placed in the first position.

[0168] In this way, when the first position is set by the second extension receiving portion, the first extension restricting portion 23 may be formed on the inner wall surface of the housing 2, as in the circuit breaker 1 of the above embodiment, or the first extension restricting portion 23 may not be formed on the inner wall surface of the housing 2.

[0169] However, as in the circuit breaker 1 of the above embodiment, it is preferable to form only the first extension restricting portion 23 on the inner wall surface of the housing 2, and to configure the first engaging member 322 in the engaging position so that the other plate surface of the first engaging main body portion 3221 abuts against the first extension restricting portion 23, thereby restricting the movement of the first engaging member 322 and the second movable member 422.

[0170] A more specific explanation will be given below. When the engagement position of the first engagement member 322 changes, the degree of engagement between the first engagement receiving portion 3223 and the presser plate 520 also changes, and therefore the interruption performance of the circuit breaker 1 also changes. For this reason, it is preferable that the circuit breaker 1 be configured so that the engagement position of the first engagement member 322 is prevented from changing.

[0171] In order to prevent the engagement position of the first engagement member 322 from changing, it is more appropriate to form only the first extension regulating portion 23 on the inner wall surface of the housing 2, and to configure the first engagement member 322 so that the movement of the first engagement member 322 and the movement of the second movable member 422 are regulated by positioning the first engagement member 322 in the engagement position and causing the other plate surface of the first engagement main body portion 3221 to abut against the first extension regulating portion 23. [Explanation of symbols]

[0172] REFERENCE SIGNS LIST 1...circuit breaker, 2...casing, 3...first conductive path, 4...second conductive path, 5...closing operation mechanism, 6...interlocking member, 7...first restraining means, 8...second restraining means, 20...exterior body, 21...insulating wall, 23...first extension restricting portion, 24...second extension restricting portion, 30...first terminal portion, 31...first opening / closing portion, 32...first operating mechanism, 40...second terminal portion, 41...second opening / closing portion, 42...second operating mechanism, 50...crossbar, 51...push-up biasing means, 52...holding member, 53...holding operation portion, 60...locking Mating side contact portion, 61...movable side contact portion, 62...contact / separation contact portion, 200...rear surface, 201...front surface, 202...inner surface, 203...outer surface, 210...one side insulating wall, 211...other side insulating wall, 300...first one side terminal portion, 301...first other side terminal portion, 310...first fixed contact portion, 311...first movable contact portion, 320...first bimetal, 321...first electromagnetic body, 322...first engaging member, 323...first positioning biasing means, 400...second one side terminal portion, 401...second other side terminal portion, 4 10...second fixed contact portion, 411...second movable contact portion, 420...second bimetal, 421...second electromagnetic body, 422...second rotating body, 422...second movable member, 423...second interrupter biasing means, 520...pressure plate, 521...operated portion, 530...handle, 531...link, 3000...first one terminal body, 3001...first one conductor portion, 3010...first other terminal body, 3100...first fixed conductive plate, 3101...first fixed contact, 3110...first movable conductive plate, 311 1...first movable contact, 3112...first base, 3210...first frame portion, 3211...first frame holding portion, 3220...first base portion, 3221...first engagement main body portion, 3223...first engagement receiving portion, 4000...second one-side connecting portion, 4010...second other-side connecting portion, 4100...second fixed conductive plate, 4101...second fixed contact, 4110...second movable conductive plate, 4111...second movable contact, 4210...second frame portion, 4211...second frame holding portion, 4220...second base portion, 4221...second movable main body portion

Claims

1. a closing operation mechanism that maintains the conductive path in the housing in a closed state; a first operating mechanism that activates a tripping operation that releases the state in which the closing operation mechanism closes the conductive path and opens the conductive path; a second operating mechanism separate from the first operating mechanism that activates the trip operation; an interlocking member that interlocks the first operating mechanism and the second operating mechanism, The first actuation mechanism includes: an engaging member configured to move between an engaging position where the engaging member engages with the closing operation mechanism so as to maintain the conductive path of the closing operation mechanism in a closed state, and a disengaging position where the engaging member disengages from the closing operation mechanism so as to release the closing operation mechanism from maintaining the conductive path in a closed state; and a positioning biasing means for biasing the engaging member so that the engaging member is disposed at the engaging position, the second actuation mechanism has a movable member that moves between a first position and a second position; The interlocking member is configured to bias the movable member to the first position by the biasing force of the positioning biasing means, and to move the engaging member from the engaging position to the disengaging position as the movable member moves from the first position to the second position. Circuit breaker.

2. the first actuation mechanism and the second actuation mechanism are disposed opposite each other with the closing operation mechanism interposed therebetween, The interlocking member is provided so as to cross the closing operation mechanism in an opposing direction, where the first operating mechanism and the second operating mechanism are opposed to each other.

10. The circuit breaker of claim 1.

3. The second actuation mechanism is an electromagnetic body configured to generate a magnetic force in response to a current flowing through the conductive path; the movable member is configured to move from the first position away from the electromagnetic body to the second position closer to the electromagnetic body.

3. The circuit breaker according to claim 1 or 2.

4. The second actuation mechanism is an electromagnetic body configured to generate a magnetic force in response to a current flowing through the conductive path; The electromagnetic body is constituted by the movable member.

3. The circuit breaker according to claim 1 or 2.

5. the interlocking member is configured to be sandwiched between the engaging member and the movable member by the biasing force of the positioning biasing means when the engaging member is disposed at the engaging position and the movable member is disposed at the first position.

3. The circuit breaker according to claim 1 or 2.

6. a first restraining means for restraining the engaging member and the interlocking member so that the engaging member and the interlocking member do not move relative to each other in the direction in which the engaging member moves; 3. The circuit breaker according to claim 1 or 2.

7. a second restraining means for restraining the movable member and the interlocking member so that they do not move relatively in the direction of movement of the movable member; 3. The circuit breaker according to claim 1 or 2.

8. The second actuation mechanism is an electromagnetic body that becomes an electromagnet when a current flows through the conductive path; and a blocking biasing means in contact with the electromagnetic body, the movable member and the electromagnetic body are disposed opposite each other in a state in which they can be moved toward or away from each other, the movable member is configured to push and operate the interlocking member in accordance with an action of approaching the electromagnetic body to release the engagement between the engaging member and the closing operation mechanism, The blocking biasing means is configured to bias the electromagnetic body in a direction approaching the movable member.

10. The circuit breaker of claim 1.

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