JP2009289484A - Interlock breaking mechanism for circuit breaker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an interlock breaking mechanism for circuit breaker with improved durability. <P>SOLUTION: The interlocking breaking mechanism of a circuit breaker is structured of a plurality of circuit breakers 1, arranged in adjacency in the width direction of bodies 10, and an interlocking part 5 arranged between the bodies 10 of the adjacent circuit breakers 1 for making one of the circuit breakers 1 perform tripping operation when the other performed tripping operation. The interlocking part 5 is integrally equipped with its body part 50 fitted in free sliding movement, along a given direction between the bodies 10 of the adjacent circuit breakers 1; a pair of interlocking protrusions 51 inserted into the body 10 of each of the adjacent circuit breakers 1 for moving the body part 50 at tripping operations of the circuit breakers 1; and a pair of latch releasing parts 52 inserted into the body 10 of each of the adjacent circuit breakers 1 for making the circuit breakers 1 perform tripping operations at sliding movement of the main body part 50. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an interlocking breaking mechanism of a circuit breaker.

  Conventionally, as a circuit breaker interposed in an electric circuit between a power source and a load device (various load devices such as lighting fixtures), the contact is fixed to a predetermined position in the body and the fixed contact is separated from the fixed contact. A contact part composed of movable contacts, an opening / closing mechanism part that opens and closes the contact part by operating the handle, and an operation for forcibly opening the contact part when an abnormal current such as an overload current or a short-circuit current is detected (so-called A device having a trip mechanism for performing a trip operation has been proposed.

  This type of circuit breaker performs individual trip operations. For example, when used as a branch breaker in a distribution board such as a residential distribution board, the circuit breaker is linked to a plurality of circuit breakers. There is a desire to do it.

  Therefore, when a circuit breaker is placed between the multiple circuit breakers arranged adjacent to each other in the width direction of the vessel and the adjacent circuit breaker, the other circuit breaker is tripped. An interlocking / breaking mechanism of a circuit breaker configured with an interlocking unit to be proposed has been proposed (for example, see Patent Document 1).

The interlocking part (trip interlocking member) used for the interlocking circuit breaker of the circuit breaker described above mechanically connects the trip mechanism parts of adjacent circuit breakers, and the trip operation is performed in one circuit breaker. When this occurs, the force generated in the trip mechanism during the trip operation is transmitted to the trip mechanism of the other circuit breaker, thereby causing the other circuit breaker to perform the trip operation. In the thing shown in patent document 1, what was supported rotatably between the bodies of a circuit breaker is used as an interlocking part, and the trip mechanism of one circuit breaker is made when the interlocking part rotates. The direction of the force generated at one of the circuit breakers is changed to be transmitted to the trip mechanism of the other circuit breaker.
Japanese Patent Laying-Open No. 2005-158395 (in particular, see paragraphs [0025] and [0026] and FIGS. 1, 4 and 5)

  However, in the case where the interlocking portion rotates as described above, when a force is transmitted by the interlocking portion, a large load is applied to the shaft portion for rotatably supporting the interlocking portion and the bearing portion that receives the shaft portion. It will take. For this reason, there is no major problem if the trip operation is performed a few times.However, if the trip operation is performed a number of times, the shaft part and the bearing part may be worn or damaged, and force is applied by the interlocking part. There is a risk that transmission cannot be performed correctly (that is, the circuit breaker cannot be linked), and improvement in durability has been desired.

  The present invention has been made in view of the above points, and an object thereof is to provide an interlocking breaking mechanism for a circuit breaker that can improve durability.

  In order to solve the above-described problem, in the invention of claim 1, a plurality of circuit breakers arranged adjacent to each other in the width direction of the vessel body and one circuit breaker arranged between the adjacent circuit breaker bodies A circuit breaker interlocking breaking mechanism comprising an interlocking unit that trips the other circuit breaker when the circuit breaker operates, the circuit breaker having a fixed contact fixed at a predetermined position in the body and A contact portion composed of a movable contact that contacts and separates from the fixed contact, a movable portion having a movable contact provided with the movable contact, and an urging force in the opening direction that is elastically contacted with the movable portion so that the movable contact is separated from the fixed contact. An opening spring applied to the movable contact, a handle that is pivotally attached to the body and used for opening and closing the contact portion, and the movable portion is connected to the handle when the handle is in the closing position. Open by biasing force The pressing member positioned at the closing position that closes the contact portion against the biasing force of the opening spring so as not to move in the direction, and the pressing member does not move from the closing position when the handle is positioned at the closing position. The latch member that restricts the movement of the pressing member and the latch member is moved to a position where the movement restriction of the pressing member is released when an abnormal current is detected, and the pressing member is moved from the closed position according to the biasing force of the opening spring. A trip mechanism for performing a trip operation for moving the contact portion to a trip position for opening the contact portion, and the interlocking portion is slidably mounted along a predetermined direction between adjacent circuit breaker bodies And the pressing member is inserted into the body of each adjacent circuit breaker so as to advance on the moving path from the closed position to the trip position, and the pressing member is moved from the closed position to the trip position. A pair of interlocking protrusions that are pressed by a pressing member when moving to the position of the main body and sliding the main body along a predetermined direction, and when the main body slides when inserted into the body of each adjacent circuit breaker And a pair of latch releasing portions that move to a position where the movement of the pressing member is released by pressing the latch member.

  According to the invention of claim 1, when a trip operation is performed in one of the adjacent circuit breakers, the interlocking protrusion inserted into one of the circuit breakers when the pressing member moves from the closed position to the trip position Is pressed by the pressing member, and the main body portion of the interlocking portion slides. As a result, the latch release portion inserted into the body of the other circuit breaker presses the latch member of the other circuit breaker and In order to release the movement restriction of the pressing member, a trip operation is also performed in the other circuit breaker. At this time, the interlocking portion slides, so that unlike the conventional case where the interlocking portion rotates, the shaft Since there is no portion to which a large load such as a portion or a bearing portion is applied, it is possible to suppress wear or breakage caused by a number of trip operations and improve durability.

  The present invention has an effect that durability can be improved.

  As shown in FIGS. 1 to 6, the circuit breaker interlocking breaking mechanism of one embodiment of the present invention includes a plurality (two in the illustrated example) of circuit breakers 1 arranged adjacent to each other in the width direction of the vessel body 10. And an interlocking unit 5 that is arranged between adjacent circuit breakers 1 and that trips one circuit breaker 1 when the other circuit breaker 1 trips.

  The circuit breaker 1 is a branch breaker used for, for example, a residential distribution board, and the container 10 is made of an insulating resin material or the like, as shown in FIGS. It is formed in a rectangular box shape having a large dimension in the order of (normal direction of the paper surface in FIG. 2), height direction (vertical direction in FIG. 2), and length direction (horizontal direction in FIG. 2). In the following, in order to simplify the description, the upper side in FIG. 2 is the front side of the body 10, the lower side in FIG. 2 is the rear side of the body 10, the left side in FIG. 2 is the left side of the body 10, and FIG. However, this is not intended to limit the form of use of the circuit breaker 1.

  On the right end side of the vessel body 10 (on the one end side in the length direction and on the right side in FIG. 2), a power supply side terminal portion 20 that can be connected to a conductive bar (not shown) such as the above-mentioned residential distribution board is provided. A load-side terminal plate 21 is provided on the left end side (the other end side in the length direction and the left side in FIG. 2) of the container body 10. In addition, a fastening screw 22 is provided on the left end side of the load side terminal plate 21, and an electric wire (not shown) for connection to various loads such as lighting fixtures is provided by the load side terminal plate 21 and the fastening screw 22. A load-side terminal portion made up of screw terminals to be connected. On the right end side of the vessel body 10, three slits 10 a for inserting the conductive bar into the power supply side terminal portion 20 are provided along the height direction of the vessel body 10. It arrange | positions in the position corresponding to one of the slits 10a (it arrange | positions in the position corresponding to the uppermost slit 10a in the example of illustration). In addition, the structure of such a power supply side terminal part 20 and a load side terminal part is an example to the last, Comprising: It is not the meaning limited to this.

  A contact portion X that opens and closes an electric path between the power supply side terminal portion 20 and the load side terminal plate 21 is provided in the container body 10. The contact portion X includes a fixed contact (not shown) that is fixed at a predetermined position in the container body 10 and a movable contact 23 that contacts and separates from the fixed contact. In the present embodiment, the fixed contact is provided on the right end side of the load side terminal plate 21, and the movable contact 23 is provided on the left end side of the long plate-like movable contact 24 movably accommodated in the container body 10. Note that both the fixed contact and the movable contact 23 are formed of a metal material (for example, a silver-based metal material) having high welding resistance, environmental resistance, and heat resistance.

  Further, in the vessel body 10, a bimetal 24 having an L-shaped cross section is accommodated in the vessel body 10 along the longitudinal direction of the vessel body 10. One end side in the longitudinal direction (the lower end side in FIG. 2) which is the free end side of the bimetal 24 is connected to the right end side of the movable contact 24 by an electric wire (not shown) (for example, a braided wire which is a flexible electric wire). On the other hand, the other end side in the longitudinal direction (the upper end side in FIG. 2) which is the fixed end side of the bimetal 25 is connected to the power supply side terminal portion 20 by an electric wire (not shown) (for example, a braided wire). That is, the bimetal 25 is inserted in the electric path between the movable contact 24 and the power supply side terminal portion 20. Further, the bimetal 25 is configured such that the free end moves to the left end side of the vessel 10 and presses a latch member 37 described later as its temperature rises.

  By the way, the movable contact 24 is accommodated in the container 10 in a state of being attached to the movable portion 30 made of an insulating resin material. The movable part 30 has a housing part 30a for housing the movable contact 24 in such a manner that the right end side and the left end side of the movable contact 24 protrude outward. Moreover, the movable part 30 has the axial part 30b which makes the width direction of the container 10 the center axis direction, and is rotatably attached to the container 10 by the said axial part 30b. Further, the contact pressure spring 31 is accommodated in the accommodating portion 30 a of the movable portion 30. The contact pressure spring 31 is interposed between the lower surface of the movable contact 24 and the movable portion 30, thereby enabling the movable contact 23 to contact the fixed contact with a desired contact pressure.

  Further, on the upper surface side of the movable portion 30, a pressing projection 30 c used to press the movable portion 30 by a pressing member 36 described later is integrally projected.

  In the circuit breaker 1 according to the present embodiment, the movable contactor 24 rotates together with the movable part 30, so that the contact part X can be opened and closed by rotating the movable part 30. A torsion coil spring (torsion) that is elastically contacted with the movable portion 30 and biases the movable portion 30 in the opening direction (clockwise direction in FIG. 2) in which the movable contact 23 is separated from the fixed contact. An opening spring 32 made of a spring is provided. Therefore, when closing the contact part X, the movable part 30 is moved in the closing direction (counterclockwise direction in FIG. 2) in which the movable contact 23 approaches the fixed contact against the biasing force of the opening spring 30. It is necessary to rotate.

  By the way, an arc extinguishing member 4 having an arc extinguishing plate 40 for preventing arc discharge between the fixed contact and the movable contact 23 is provided in the vessel body 10. The arc extinguishing member 4 is attached in the vicinity of the fixed contact so as to be rotatable with the width direction of the vessel 10 as the rotation axis direction. The arc extinguishing member 4 is provided with a gear (not shown), and the movable portion 30 is formed with a gear portion 30d that meshes with the gear. Therefore, the arc-extinguishing member 4 rotates in conjunction with the movable part 30, and when the movable part 30 moves to a position where the contact part X is opened, the arc-extinguishing plate 40 is interposed between the fixed contact and the movable contact 23. When the movable part 30 moves to a position where the contact part X is closed, the arc-extinguishing plate 40 moves to a non-arcing position that is not interposed between the fixed contact and the movable contact 23.

  Such a rotation operation of the movable portion 30 is performed by a handle 33 provided at the center of the front surface of the container body 10. The handle 33 is rotatably attached to the container body 10 via a shaft portion 34 whose central axis is the width direction of the container body 10. Further, an operation knob 33 a for operation protrudes from the handle 33, and the operation knob 33 a protrudes from the opening 10 b formed at the center of the front surface of the container body 10 to the outside of the container body 10. The opening 10b rotates the handle 33 between a closing position (position shown in FIG. 3) where the contact portion X is closed and an open position (position shown in FIG. 2) where the contact portion X is opened. It is formed in a size that can be

  The aforementioned pressing member 36 is connected to the handle 33 by a connecting member 35. The connecting member 35 is formed in a U-shape having a pair of shaft portions 35a and 35b whose center axis direction is the width direction of the container body 10 and a connecting portion 35c that integrally connects the ends of the pair of shaft portions 35a and 35b. One shaft portion 35 a is rotatably supported by a bearing portion 33 b provided on the handle 33, and the other shaft portion 35 b is rotatable on a bearing portion 36 a provided at the center portion of the pressing member 36. Supported.

  The pressing member 36 has a pressing portion 36b that presses the protrusion 30c of the movable portion 30 on one end side (left end side), and a fulcrum portion 36c on the other end side (right end side). In a state where the fulcrum part 36c is supported by a latch member 37 (to be described later) (the pressing member 36 is locked to the latch member 37), the pressing member 36 has the fulcrum part 36c as the fulcrum, the bearing part 36a as the force point, and the pressing part 36b. As a point of action, the movable part 30 is pressed according to the operation of the handle 33. That is, the pressing member 36 is positioned at the closed position where the movable portion 30 is pressed so that the movable portion 30 does not move in the opening direction by the biasing force of the opening spring 32 in a state where the handle 33 is located at the closing position. At the closing position, the contact portion X is closed against the biasing force of the opening spring 32. On the other hand, the pressing member 36 is located at an open position where the movable portion 30 is not pressed when the handle 33 is located at the closing position. When the pressing member 36 is located at the opening position, the movable portion 30 is moved in the opening direction by the opening spring 32, so that the contact portion X is opened.

  The aforementioned latch member 37 has a shaft portion 37a with the width direction of the vessel body 10 as the central axis direction, and is attached to the vessel body 10 so as to be rotatable around the shaft portion 37a. A support portion 37 b that supports the fulcrum portion 36 c of the pressing member 36 is provided on one end side (the upper end side in FIG. 2) of the latch member 37. Since the latch member 37 is rotatably attached to the container body 10 by the shaft portion 37a, the support position that supports the fulcrum portion 36c of the pressing member 36 by the support portion 37b (that is, the position that restricts the movement of the pressing member 36). ) And a non-supporting position where the fulcrum part 36c of the pressing member 36 is not supported by the support part 37b (that is, a position where the movement restriction of the pressing member 36 is released).

  In the circuit breaker 1 in the present embodiment, the latch member 37 is held at the support position by a holding spring 38 made of a torsion coil spring. Here, when the latch member 37 is positioned at the support position, if the handle 33 is positioned at the closing position, the pressing member 36 moves to the closing position. At this time, the pressing member 36 is moved by the opening spring 32. An urging force is applied to try to move from the closed position. However, since the fulcrum portion 36c of the pressing member 36 is supported by the support portion 37b of the latch member 37 (see FIG. 2), the movement of the pressing member 36 is restricted. Thus, the pressing member 36 is positioned at the closed position. Thus, the latch member 37 restricts the movement of the pressing member 36 so that the pressing member 36 does not move from the closed position when the handle 33 is located at the closing position. When the latch member 37 moves to the non-supporting position in a state where the handle 33 is located at the closing position (when the movement restriction of the pressing member 36 by the latch member 37 is released), the pressing member 36 is attached to the opening spring 32. It is rotated (rotated clockwise in FIG. 3) about the shaft 35b of the connecting member 35 by the force. As a result, as shown in FIG. 3, the pressing member 36 moves from the opening position to a trip position that opens the contact portion X according to the biasing force of the opening spring 32.

  Therefore, in order to cause the circuit breaker 1 to perform the trip operation, the latch member 37 may be moved from the support position to the non-support position, and for that purpose, the latch member 37 is moved to the other end side (the lower end side in FIG. 2). A restriction release portion 37c made of a magnetic material is provided. The restriction release portion 37c is located on the opposite side of the support portion 37b across the shaft portion 37a, and moves the restriction release portion 37c to the left end side of the body 10 (the latch member 37 is rotated clockwise in FIG. 2). The support portion 37b is separated from the pressing member 36, and the movement restriction of the pressing member 36 by the latch member 37 is released.

  In the present embodiment, the restriction release portion 37 c is moved to the left end side of the vessel body 10 by the bimetal 25 or the iron core 30 e provided in the movable portion 30. That is, when an abnormal current, for example, an overload current flows between the power supply side connection portion 20 and the load side terminal plate 21 when the contact portion X is closed, the bimetal 25 generated by the overload current is deformed, and the restriction is released. The portion 37 c is pressed by the free end of the bimetal 25 so as to move to the left end side, and as a result, the movement restriction of the pressing member 36 by the latch member 37 is released. The iron core 30e is formed in a U-shape in which an electric wire connecting the movable contact 24 and the bimetal 25 is arranged inside, and when an abnormal current such as a short-circuit current flows through the electric wire, the unlocking portion 37c. A magnetic field is generated so as to attract. Therefore, when an abnormal current such as a short-circuit current flows, the restriction release portion 37c moves to the left end side by the magnetic field generated in the iron core portion 30e, and as a result, the movement restriction of the pressing member 36 by the latch member 37 is released. Thus, in the circuit breaker 1 in this embodiment, a trip mechanism part is comprised by the press member 36, the latch member 37, the bimetal 25, and the iron core 30e.

  The interlocking portion 5 is a resin molded product made of an insulating material (for example, a resin material having an insulating property). As shown in FIGS. 4 and 5, the direction along the width direction of the container body 10 is the thickness direction. The main body part 50 is integrally provided with an L-shaped flat plate part 50a and guide pieces 50b projecting from both sides in the thickness direction of the flat plate part 50a. Here, a guide hole 50c through which guide pieces 50b are inserted so as to be movable in a predetermined direction (vertical direction in the present embodiment) on adjacent surfaces which are side surfaces opposed to each other in the respective body bodies 10 of the adjacent circuit breakers 1 is provided. Is formed. Accordingly, the main body 50 is slidably mounted along the predetermined direction (vertical direction in the present embodiment) between the body bodies 10 of the adjacent circuit breakers 1.

  Further, the main body 50 includes a pair of interlocking protrusions 51 serving as a first driving unit for receiving a force generated by one trip mechanism of the adjacent circuit breaker 1 and the adjacent circuit breaker 1. A pair of latch release parts 52 serving as a second drive part for transmitting force to the other trip mechanism part are integrally provided. In the illustrated example, both the interlocking protrusion 51 and the latch release part 52 are formed in a substantially prismatic shape.

  Each of the pair of interlocking protrusions 51 is formed on the tip surface of each of the pair of guide pieces 50b so as to advance on the movement path until the pressing member 36 moves from the closed position to the trip position. That is, the interlocking protrusion 51 is inserted into the respective body 10 of each of the adjacent circuit breakers 1 in such a manner as to advance on the movement path until the pressing member 36 moves from the closed position to the trip position. The interlocking protrusion 51 is pressed downward by the fulcrum part 36c of the pressing member 36 in the process in which the pressing member 36 moves from the closed position to the trip position (see FIG. 3). 36. As a result, the main body 50 slides downward as shown in FIGS. 1 (a) and 1 (b).

  Each of the pair of latch release portions 52 is provided so as to protrude from both sides in the thickness direction of the flat plate portion 50 a of the main body portion 50. The pair of latch release portions 52 are inserted into the respective device bodies 10 of the circuit breakers 1 adjacent to each other through the insertion holes 10d that are opened in the adjacent surface of the device body 10. Since the latch release portion 52 is formed integrally with the main body portion 50 and moves together with the main body portion 50, when the main body portion 50 moves downward, it moves integrally with the main body portion 50 and moves downward (FIG. 3). reference).

  Here, as shown in FIGS. 2 and 3, the latch member 37 of the circuit breaker 1 is provided with a pressing piece 37 d protruding so as to advance on the movement path of the latch release portion 52. When the part 52 moves downward, the pressing piece 37d is pressed downward by the latch releasing part 52. Then, when the pressing piece 37d is pressed downward by the latch releasing portion 52, the latch member 37 moves from the support position to the non-supporting position, and the movement restriction of the pressing member 36 by the latch member 37 is released (that is, the restriction). The same effect as when the release part 37c moves to the left end side of the container 10 is obtained).

  As described above, the interlocking circuit breaker mechanism of the circuit breaker according to the present embodiment is provided between the plurality of circuit breakers 1 arranged adjacent to each other in the width direction of the body 10 and the body 10 of the adjacent circuit breaker 1. It is comprised with the interlocking | linkage part 5 which makes the other circuit breaker 1 trip-operate when one circuit breaker 1 is tripped, and especially the interlocking | linkage part 5 is the body 10 of the adjacent circuit breaker 1 Adjacent to the main body 50, which is slidably mounted along a predetermined direction (vertical direction in the present embodiment) between the pressing member 36 and a travel path until the pressing member 36 moves from the closed position to the trip position. The circuit breaker 1 is inserted into the body 10 of the circuit breaker 1 and is pressed by the pressing member 36 when the pressing member 36 moves from the closed position to the trip position, so that the main body 50 is moved in a predetermined direction (downward in this embodiment). )along A pair of interlocking protrusions 51 to be moved and a latch member 37 is pressed and pressed when the main body part 50 is slid and moved by the interlocking protrusions 51 when inserted into the body 10 of each adjacent circuit breaker 1. A pair of latch release portions 52 that move to the position where the movement restriction of the member 36 is released are integrally provided.

  Next, the operation of the interlocking breaking mechanism of the circuit breaker of this embodiment will be described. In the following description, an interlocking breaking mechanism of a circuit breaker having two circuit breakers 1 as shown in FIG. 6 will be described. Further, in order to distinguish between the two circuit breakers 1, one is denoted by reference numeral 1A and the other is denoted by reference numeral 1B.

  In this interlocking circuit breaker mechanism, when an abnormal current is detected by the circuit breaker 1A, the pressing member 36 of the circuit breaker 1A moves from the closed position to the trip position. At this time, the interlocking protrusion 51 inserted into the circuit breaker 1 </ b> A is pressed by the pressing member 36. As a result, the main body 50 of the interlocking unit 5 slides downward, and the latch release unit 52 inserted into the body 10 of the circuit breaker 1B moves the latch member 37 of the circuit breaker 1B. Press to move from the support position to the non-support position. Therefore, also in the circuit breaker 1B, the pressing member 36 moves from the closed position to the trip position, and the trip operation is performed.

  As described above, according to the interlocking breaking mechanism of the circuit breaker of the present embodiment, the force generated in the trip mechanism part of one circuit breaker 1 by the interlocking part 5 is received by the interlocking protrusion part 51 and the other by the latch releasing part 52. In the process of transmitting to the trip mechanism part of the circuit breaker 1, the interlocking part 5 slides. Therefore, unlike the case where the interlocking part 5 rotates as in the conventional example, the pivot part of the interlocking part 5 is pivoted. Since there is no portion to which a large load is applied, such as a bearing portion, wear and breakage caused by a number of trip operations can be suppressed, and durability can be improved.

  By the way, in what is shown in the said patent document 1, a part of interlocking | linkage part is arrange | positioned near the contact part, and when an arc discharge generate | occur | produces in a contact part, a part of interlocking | linkage part is carbonized and a circuit interruption | blocking is carried out. There was a risk that the contact portions of the container would be short-circuited. On the other hand, in the interlocking breaking mechanism of the circuit breaker according to the present embodiment, as shown in FIGS. 2 and 3, the interlocking protrusion 51 and the latch releasing part 52 of the interlocking part 5 inserted into the container 10 are By disposing it on the right end side of the container body 10, it is separated from the contact portion X disposed on the left end side of the container body 10 so as to have a predetermined insulation distance with the contact portion X. In addition, the movable part 30 is interposed between the contact part X, the interlocking projection part 51 and the latch release part 52 in the container body 10. Therefore, according to the interlocking circuit breaker mechanism of the circuit breaker of this embodiment, it is possible to prevent a part of the interlocking part 5 from being carbonized due to arc discharge generated at the contact part X. It is possible to prevent the contact parts X from being short-circuited.

  The configuration of the interlocking circuit breaker mechanism of the circuit breaker according to the present embodiment is merely an embodiment of the present invention, and is not intended to limit the technical scope of the present invention to the above example, but to the extent that it does not depart from the spirit. Can be changed. For example, the configuration of the circuit breaker 1, particularly the configuration inside the circuit breaker 1, is not limited to the illustrated example, and other known configurations can be adopted as appropriate. Moreover, in FIG. 6, although what provided the two circuit breakers 1 is illustrated, the number of the circuit breakers 1 linked is not limited to two, Three or more may be sufficient.

The interlocking circuit breaker mechanism of the circuit breaker of one Embodiment of this invention is shown, (a) is a perspective view of the state which the contact part opened by the handle, (b) is a perspective view of the state which the contact part opened by trip operation | movement. is there. It is explanatory drawing which shows the state which the contact part opened by the handle | steering-wheel in the interlocking | blocking interruption | blocking mechanism of a circuit breaker same as the above. It is explanatory drawing which shows the state which the contact part opened by trip operation | movement in the interlocking | linkage breaking mechanism of a circuit breaker same as the above. It is a perspective view of the interlocking | linkage part in the same as the above. The interlocking | linkage part in the same is shown, (a) is a top view, (b) is a side view, (c) is a rear view. It is a perspective view of the interlocking breaking mechanism of a circuit breaker same as the above.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Circuit breaker 5 Interlocking part 10 Body 23 Movable contact 24 Movable contact 30 Movable part 32 Opening spring 33 Handle 36 Press member 37 Latch member 50 Main body part 51 Interlocking protrusion part 52 Latch release part X Contact part

Claims (1)

A plurality of circuit breakers arranged adjacent to each other in the width direction of the body, and an interlock that causes the other circuit breaker to trip when one of the circuit breakers trips when placed between adjacent circuit breakers A circuit breaker interlocking breaking mechanism composed of
The circuit breaker is composed of a fixed contact fixed at a predetermined position in the body, a movable contact having a movable contact contacting and separating from the fixed contact, a movable portion having a movable contact provided with the movable contact, and an elastic contact with the movable portion. Connected to the handle, an opening spring that gives the movable contact an urging force in the opening direction that separates the movable contact from the fixed contact, a handle that is pivotally attached to the body and used to open and close the contact portion In the state where the handle is in the closing position, the movable part is located at the closed position where the contact part is closed against the biasing force of the opening spring so that the movable part does not move in the opening direction by the biasing force of the opening spring. The pressing member, a latch member that restricts the movement of the pressing member so that the pressing member does not move from the closed position when the handle is in the closing position, and the movement of the pressing member when the abnormal current is detected. Release And a trip mechanism for causing the position trip operation moving the contacts to a trip position to opening by the biasing force of the opening spring pressing member from closing position is moved to that,
The interlocking part is a main body part that is slidably mounted along a predetermined direction between adjacent circuit breaker bodies, and a form that moves forward on the movement path until the pressing member moves from the closed position to the trip position. A pair of interlocking protrusions that are inserted into the body of each adjacent circuit breaker, and are pressed by the pressing member when the pressing member moves from the closed position to the trip position, and the main body slides in a predetermined direction. And a pair of latch release parts that are inserted into the body of each adjacent circuit breaker and that move to a position where the latch member is pressed and the movement restriction of the pressing member is released when the main body slides. A circuit breaker interlocking breaking mechanism characterized by that.

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