JP4012051B2 - Circuit breaker and circuit breaker combined with external attachment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a circuit breaker and a circuit breaker device in which an external attachment is combined with the circuit breaker.
[0002]
[Prior art]
In general, a circuit breaker has a circuit breaker fixed contact, a circuit breaker movable contact, a circuit breaker movable contact drive mechanism for moving the circuit breaker movable contact with the circuit breaker fixed contact, and a movable circuit. A contact trip device is housed, and a manual trip lever of a circuit breaker movable contact drive mechanism is provided outside the circuit breaker outer box, and is connected to the circuit breaker fixed contact and the circuit breaker movable contact. A breaker external terminal is provided. The movable contact tripping device automatically releases the latch of the circuit breaker movable contact driving mechanism in response to an overcurrent of the electric circuit, and automatically separates the circuit breaker movable contact from the circuit breaker fixed contact.
[0003]
A circuit breaker in which an external attachment is combined with this circuit breaker is shown, for example, in FIG. 1 of Japanese Patent Laid-Open No. 1-225030. This external attachment is combined with the circuit breaker so as to work with the circuit breaker. This external attachment is used in two ways based on the interlocking with the circuit breaker. The first mode is a mode in which the circuit breaker is driven by an external attachment. In this first aspect, an external control voltage is supplied to the external attachment, and the circuit breaker is tripped by this external control voltage. This external control voltage drives the accessory movable contact drive mechanism, pulls the accessory movable contact away from the accessory fixed contact and turns them off, and at the same time, the accessory movable contact drive mechanism drives the circuit breaker movable contact drive mechanism. Remove the circuit breaker movable contact from the circuit breaker fixed contact. In the second mode, conversely, the external attachment is driven by a circuit breaker. In this second mode, the circuit breaker movable contact tripping device releases the latch of the circuit breaker movable contact drive mechanism, and the circuit breaker movable contact is removed from the circuit breaker fixed contact. The contact drive mechanism drives the appendage movable contact drive mechanism, pulls the appendage movable contact from the appendage fixed contact, and turns them off. In this second aspect, the second appendage movable contact and the second appendage fixed contact are attached to the external appendage, and the second appendage movable contact is connected to the external appendage by tripping the circuit breaker. There are also those that turn on the two accessory fixed contacts.
[0004]
In many external attachments, the outer case is shared with the breaker outer case. The accessory outer box generally contains an accessory fixed contact, an accessory movable contact, and an accessory movable contact drive mechanism that separates the accessory movable contact from the accessory fixed contact. In the first aspect, an appendage trip device is further accommodated. A manual trip lever for the accessory movable contact driving mechanism is provided outside the accessory outer box, and an accessory external terminal connected to the accessory fixed contact and the accessory movable contact is provided.
[0005]
In a circuit breaker that combines a circuit breaker and an external attachment, the breaker outer box and the accessory outer box are arranged in contact with each other, and between the breaker outer box and the accessory outer box, A connecting member for connecting the circuit breaker movable contact driving mechanism and the accessory movable contact driving mechanism is attached. In order to attach this connecting member, a connecting hole for passing the connecting member is formed in the circuit breaker outer box and the accessory outer box at positions facing each other. The connection hole of the circuit breaker is blocked with an insulating cover when an external attachment is not combined, but when the circuit breaker and an external attachment are combined, this insulation cover is unnecessary. Conventionally, it has been discarded.
[0006]
Further, when the circuit breaker and the external attachment are combined, the breaker external terminal and the attachment external terminal come close to each other, so that an insulation barrier is provided between these external terminals. In particular, this insulation barrier is provided between the load-side circuit breaker external terminal and the load-side appendage external terminal for performing busbar connection. In many cases, the load-side circuit breaker external terminal is connected to the circuit breaker movable contact, but there are also terminals connected to the circuit breaker fixed contact. This insulation barrier is also discarded in the prior art because it is not required when the external attachment is removed from the circuit breaker and the circuit breaker is used alone.
[0007]
[Patent Literature]
Japanese Patent Application Laid-Open No. 1-225030, particularly FIG.
[0008]
[Problems to be solved by the invention]
The destruction of the insulating cover and the insulating barrier not only increases waste materials, but also results in wasteful consumption of insulating material resources.
The present invention proposes a circuit breaker capable of preventing such an increase in waste material and effectively using an insulating material resource.
The present invention also proposes a circuit breaker that combines an external attachment and a circuit breaker that can prevent an increase in waste materials and can effectively use insulating resources.
[0009]
[Means for Solving the Problems]
The circuit breaker according to the present invention is a circuit breaker that can be combined with an external attachment, and includes a circuit breaker outer box,
The breaker outer box contains a fixed contact, a movable contact, a movable contact driving mechanism for separating the movable contact from the fixed contact, and a trip device for the movable contact. Has a connection hole for connecting the movable contact driving mechanism to the external attachment, and an external terminal connected to the fixed contact or the movable contact is disposed outside the breaker outer box. And
Further, an insulating plate is attached to the circuit breaker outer box, and the insulating plate is configured to be attachable to both the first position for closing the connection hole and the second position adjacent to the external terminal. It is arranged at either one of the first position and the second position.
[0010]
In the circuit breaker of the present invention, one insulating plate is configured to be attachable to both the first position that closes the connecting hole and the second position that is adjacent to the external terminal. It arrange | positions in any one position of 2 positions. As a result, the insulating plate material is shared as an insulating cover and as an insulating barrier, and the insulating material can be effectively used while preventing an increase in waste materials.
[0011]
The circuit breaker according to the present invention is a circuit breaker comprising a circuit breaker and an external attachment combined with the circuit breaker,
The circuit breaker has a circuit breaker outer box. Inside the circuit breaker outer box, a circuit breaker fixed contact, a circuit breaker movable contact, and the circuit breaker movable contact are separated from the circuit breaker fixed contact. A circuit breaker movable contact driving mechanism and a tripping device for contacting the same are accommodated, and a circuit breaker external terminal connected to the circuit breaker fixed contact or circuit breaker movable contact is disposed outside the circuit breaker outer box,
The external attachment has an attachment outer box, and the attachment outer contact box has an attachment fixed contact, an attachment movable contact, and the attachment movable contact with respect to the attachment fixed contact. An accessory movable contact driving mechanism to be separated and connected is accommodated, and an accessory external terminal connected to the accessory fixed contact or the accessory movable contact is arranged outside the accessory outer box,
The circuit breaker outer box and the accessory outer box are each formed with a connection hole for connecting the circuit breaker movable contact driving mechanism and the accessory movable contact driving mechanism,
Further, an insulating plate material is attached to the circuit breaker outer box, and this insulating plate material is disposed at a second position between the circuit breaker external terminal and the external device external terminal and functions as an insulation barrier therebetween. However, it is configured to be attachable to a first position where the connection hole of the circuit breaker outer box is closed.
[0012]
In the circuit breaker according to the present invention, one insulating plate is disposed at the second position between the breaker external terminal and the accessory external terminal, and functions as an insulation barrier between them. It is also configured to be attachable to the first position where the connection hole is closed. As a result, one insulating plate is used as an insulating barrier at the second position and as an insulating cover at the first position, so that an effective use of the insulating material can be achieved while preventing an increase in waste material.
[0013]
[Embodiment]
DESCRIPTION OF EMBODIMENTS Embodiments of a circuit breaker according to the present invention and a circuit breaker combined with an external attachment will be described with reference to the drawings.
Embodiment 1 FIG.
1A and 1B show Embodiment 1 of a circuit breaker according to the present invention, FIG. 1A is a front view thereof, and FIG. 1B is a right side view thereof. 2A and 2B show an external attachment attached to the circuit breaker shown in FIGS. 1A and 1B. FIG. 2A is a left side view thereof, and FIG. Is a front view thereof. 3 (A) and 3 (B) are constructed by combining the circuit breaker shown in FIGS. 1 (A) and 1 (B) and the external attachment shown in FIGS. 2 (A) and 2 (B). Embodiment 1 of a circuit breaker is shown, FIG. 3 (A) is a front view thereof, and FIG. 3 (B) is a cross-sectional view taken along the line BB in FIG.
[0014]
[Description of Circuit Breaker 10]
First, the circuit breaker 10 of Embodiment 1 is demonstrated with reference to FIG. 1 (A) (B). The circuit breaker 10 has a breaker outer box 11. This circuit breaker outer box 11 is made by molding an electrically insulating resin such as nylon resin into a thin box shape. On the outer surface of the circuit breaker outer box 11, there are formed a right side surface 12, a left side surface 13, a pair of upper end surface 14, a lower end surface 15, an upper surface 16, and a lower surface 17.
[0015]
Inside the circuit breaker outer box 11, a circuit breaker fixed contact, a circuit breaker movable contact, a circuit breaker movable contact drive mechanism, and a tripping device are accommodated. These circuit breaker fixed contact, circuit breaker movable contact, circuit breaker movable contact driving mechanism, and trip device are well known and are not shown. As is well known, the circuit breaker movable contact drive mechanism is a drive mechanism for connecting and disconnecting the circuit breaker movable contact to the circuit breaker fixed contact and includes a latch mechanism. By this latch mechanism, the circuit breaker movable contact is interrupted at high speed. The circuit breaker fixed contact is separated, and the circuit breaker movable contact is joined to the circuit breaker fixed contact at high speed. As is well known, the tripping device includes, for example, an electromagnet having a coil through which a circuit current flows. When the circuit current exceeds a predetermined value and becomes an overcurrent, the latch mechanism of the circuit breaker movable contact driving mechanism is automatically activated. The circuit breaker movable contact is separated from the circuit breaker fixed contact.
[0016]
A manual trip lever 18 is arranged on the upper surface 16 of the circuit breaker outer box 11. The manual trip lever 18 is rotated when the breaker movable contact drive mechanism is manually pulled off. A circuit breaker external terminal 19 is disposed on the lower end surface 15 of the circuit breaker outer box 11. Although this circuit breaker external terminal 19 is connected to the circuit breaker movable contact, it can also be connected to a circuit breaker fixed contact. The circuit breaker external terminal 19 is disposed on the terminal support 11 </ b> A of the circuit breaker outer box 11, and is covered with a terminal cover 11 </ b> B formed to protrude from the side surface 12.
[0017]
A first recess 20 is formed at a first position on the upper side of the right side surface 12 of the circuit breaker outer box 11. The first recess 20 has a substantially rectangular outline shape. Specifically, the first recess 20 has a pair of long sides 21 and 22 and a pair of short sides 23 and 24. A circular arc surface 25 is formed. The first recess 20 has an inner wall 26 that constitutes a part of the right side wall of the circuit breaker outer box 11. A fan-shaped connecting hole 27 and a small concave hole 28 are formed in the inner wall 26 of the first concave portion 20. The connection hole 27 passes through the right side wall of the circuit breaker outer box 11 in the inner wall 26 and communicates with the inside of the circuit breaker outer box 11. The small concave hole 28 is formed in a circular shape at the center of the sector formed by the connecting hole 27.
[0018]
One insulating plate 30 is attached to the circuit breaker outer box 11. The insulating plate 30 is fitted into the first recess 20 and bonded to the inner wall 22 of the first recess 20 using, for example, a double-sided adhesive tape. The insulating plate member 30 is made into a flat plate shape by punching a molded product obtained by molding an electrically insulating resin such as a phenol resin into a flat plate shape. The insulating plate 30 has a rectangular outline shape that is substantially the same size as the first recess 20, and fits exactly into the first recess 20. Specifically, the outline of the insulating plate member 30 includes a pair of long sides 31 and 32 and a pair of short sides 33 and 34, and further includes a corner formed by the long side 32 and the short side 34. The circular arc surface 35 is opposed to the circular arc surface 25.
[0019]
The pair of long sides 31 and 32 are inscribed in the pair of long sides 21 and 22 of the first recess 20, respectively, and the pair of short sides 33 and 34 are respectively connected to the pair of short sides 23 and 24 of the first recess 20. The insulative plate 30 is fitted into the first recess 20 so as to be inscribed. The insulating plate member 30 is formed with a through hole 36 that penetrates the insulating plate member 30. The through hole 36 has a circular shape and is formed in a corner portion constituted by the long side 31 and the short side 34.
[0020]
The insulating plate 30 functions as an insulating cover that closes the connecting hole 27 in a state where the insulating plate 30 is fitted in the first recess 20. The insulating plate member 30 fitted in the first recess 20 closes the connection hole 27 and prevents the inside of the circuit breaker outer box 11 from being opened to the outside of the circuit breaker outer box 11 through the connection hole 23. The insulating plate member 30 fitted in the first recess 20 covers the recess 28 as well as the connection hole 27. Further, the through hole 36 in which the insulating plate material 30 is formed is closed by the inner wall 26 of the first recess 20 in a state where the insulating plate material 30 is fitted in the first recess 20.
[0021]
A second recess 40 is formed at a second position below the right side surface 12 of the circuit breaker outer box 11. This 2nd position is a position adjacent to the circuit breaker external terminal 19, and the 2nd recessed part 40 is formed ranging over the terminal support part 11A and the terminal cover part 11B. The second recess 40 has the same contour shape as the portion of the short side 23 of the first recess 20 is cut away. Specifically, it has a pair of long sides 41 and 42 and one short side 44 connecting them. The pair of long sides 41 and 42 correspond to the pair of long sides 21 and 22 of the first recess 20 and have substantially the same length as them. The short side 44 corresponds to the short side 24 of the first recess 20 and has the same length. The second recess 40 has an arcuate surface 45 at the corner formed by the long side 42 and the short side 44. The circular arc surface 45 corresponds to the circular arc surface 25 of the first recess 20 and has the same diameter. The second recess 40 has an inner wall 46. The inner wall 46 is formed so as to straddle the terminal support portion 11 </ b> A and the terminal cover portion 11 </ b> B and to be adjacent to almost three sides of the external terminal 19. A rib 47 protrudes from a part of the inner wall 46. The rib 47 is formed at a corner formed by the long side 41 and the short side 44.
[0022]
In FIGS. 1A and 1B, the insulating plate member 30 is disposed at the first position and is fitted into the first recess 20, but is also fitted into the second recess 40 at the second position. And can be attached to the second recess 40. The long side 31 of the insulating plate 30 is the long side 41 of the second recess 40, the long side 32 of the insulating plate 30 is the long side 42 of the second recess 40, and the short side 34 of the insulating plate 30 is the second. It is possible to fit the insulating plate 30 into the second recess 40 so as to be inscribed in the short sides 44 of the recess 40. In a state where the insulating plate member 30 is fitted into the second recess 40, the rib 47 is fitted into the through hole 36 of the insulating plate member 30, and the insulating plate member 30 is positioned and fixed.
[0023]
[Description of external attachment 50]
Next, the external attachment 50 will be described with reference to FIGS. The external box 51 of the external attachment 50 has a first and second recesses 60 and 80 corresponding to the first and second recesses 20 and 40 of the circuit breaker outer box 11. Except for the point formed on the left side surface 53 of 51, it has substantially the same configuration as the circuit breaker outer box 11 of the circuit breaker 10.
[0024]
The external attachment 50 of Embodiment 1 has an attachment outer box 51 shown in FIGS. 2 (A) and 2 (B). The appendage outer box 51 is made by molding an electrically insulating resin such as nylon resin into a thin box shape. On the outer surface of the appendage outer box 51, a right side surface 52, a left side surface 53, a pair of upper end surface 54, a lower end surface 55, an upper surface 56, and a lower surface 57 are formed.
[0025]
An appendage fixed contact, an appendage movable contact, and an appendage movable contact drive mechanism are accommodated inside the appendage outer box 51. When the external attachment 50 is used in a mode of driving the circuit breaker 10, the attachment removal device is also accommodated in the attachment outer box 51. These accessory fixed contact, accessory movable contact, accessory movable contact drive mechanism, and accessory trip device are well known and are not shown. As is well known, the accessory movable contact drive mechanism is a drive mechanism for separating the accessory movable contact from the accessory fixed contact, and includes a latch mechanism. By this latch mechanism, the breaker movable contact is attached at high speed. Separate from the fixed contact of the device, and connect the movable contact of the accessory to the fixed device contact at high speed.
[0026]
A manual trip lever 58 is disposed on the upper surface 56 of the appendage outer box 51. The manual trip lever 58 is rotated when the appendage movable contact drive mechanism is manually pulled off. An appendage external terminal 59 is disposed on the lower surface 57 of the appendage outer box 51. The appendage external terminal 59 is often connected to an appendage movable contact, but can also be connected to an appendage fixed contact. The accessory external terminal 59 is disposed on the terminal support portion 51A of the accessory outer box 51, and is covered with a terminal cover portion 51B formed to protrude from the left side surface 53.
[0027]
A first recess 60 is formed at a first position on the left side surface 53 of the appendage outer box 51. The first recess 60 has a substantially rectangular outline shape and has a geometrically congruent shape with the first recess 20 of the circuit breaker outer box 11.
The first recess 60 includes a pair of long sides 61 and 62 and a pair of short sides 63 and 64, and an arcuate surface 65 is formed at a corner formed by the long sides 62 and the short sides 64. Is formed. The first recess 60 has an inner wall 66, and this inner wall 66 constitutes a part of the left side wall of the appendage outer box 51. A fan-shaped connecting hole 67 and a small concave hole 68 are formed in the inner wall 66 of the first concave portion 60. The connection hole 67 passes through the left side wall of the appendage outer box 51 in the inner wall 66 and communicates with the interior of the appendage outer box 51. The small concave hole 68 is formed in a circular shape at the center of the sector formed by the connecting hole 67.
[0028]
A second recess 80 is formed at a second position below the left side surface 53 of the appendix outer box 51. The second position is a position adjacent to the appendage external terminal 59, and the second recess 80 has a geometrically congruent shape with the second recess 40 of the circuit breaker outer box 11.
The second recess 80 is formed across the terminal support 51A and the terminal cover 51B. The second recess 80 has the same contour shape as when the portion of the short side 63 of the first recess 60 is cut off. Specifically, it has a pair of long sides 81 and 82 and one short side 84 connecting them. The pair of long sides 81 and 82 correspond to the pair of long sides 61 and 62 of the first recess 60 and have substantially the same length as those. The short side 84 corresponds to the short side 64 of the first recess 60 and has the same length. The second recess 80 has an arcuate surface 85 at the corner formed by the long side 82 and the short side 84. This circular arc surface 85 corresponds to the circular arc surface 65 of the first recess 60 and has the same diameter. The second recess 80 has an inner wall 86. The inner wall 86 is formed so as to straddle the terminal support portion 51A and the terminal cover portion 51B and to be adjacent to almost three sides of the external terminal 59. A rib 87 protrudes from a part of the inner wall 86. The rib 87 is formed at a corner portion composed of a long side 81 and a short side 84.
[0029]
[Description of Circuit Breaker 100 Combining Circuit Breaker 10 and External Attachment 50]
Now, a first embodiment of a circuit breaker 100 in which the circuit breaker 10 and the external attachment 50 are combined will be described with reference to FIGS.
[0030]
In the circuit breaker 100 according to the first embodiment, the circuit breaker 10 and the external attachment 50 are provided with an attachment outer box 51 on the right side of the breaker outer box 11 as shown in FIG. Combined in a line. The circuit breaker outer box 11 and the accessory outer box 51 are formed with the same basic outer shape, and their side surfaces 12, 13, 52, 53 have the same contour, so these contours are the same. Are matched with each other, and the right side surface 12 of the circuit breaker outer box 11 and the left side surface 53 of the accessory outer box 51 are in contact with each other (hereinafter referred to as a combined form). FIG. 3 (A) shows a state in which the right side surface 12 of the circuit breaker 10 and the left side surface 53 of the external attachment 50 are opposed to each other with an interval in order to make the drawing easier to understand. In the form, those intervals are eliminated.
[0031]
In this combined form, the upper surface 16 of the circuit breaker outer box 11 and the upper surface 56 of the appendage outer box 51 are adjacent to each other, and the manual trip levers 18 and 58 are also adjacent to each other. Moreover, in the said combination form, the lower end surface 15 of the circuit breaker outer box 11 and the lower end surface 55 of the accessory outer box 51 are also adjacent to each other, and the circuit breaker external terminal 19 and the accessory external terminal 59 are also adjacent to each other.
[0032]
In the combination form, the first concave portion 20 of the circuit breaker outer box 11 and the first concave portion 60 of the appendage outer box 50 are adjacent to each other with their contours matched. Specifically, the long sides 61 and 62, the short sides 63 and 64, and the arc surface 65 of the first recess 60 of the appendage outer box 51 are the long sides of the first recess 20 of the circuit breaker outer box 11. 21 and 22, the short sides 23 and 24, and the circular arc surface 25 are adjacent to each other. Further, the inner wall 66 of the first recess 60 of the appendage outer box 51, the connection hole 67, and the small recess hole 68 are the inner wall 26 of the first recess 20 of the circuit breaker outer box 11, the connection hole 27, The small concavities 28 face each other.
[0033]
In the combination form, the second concave portion 40 of the circuit breaker outer box 11 and the second concave portion 80 of the appendage outer box 51 are also opposed to and adjacent to each other with their contours matched. Specifically, in the combination form, the long sides 81 and 82, the short side 84, and the arcuate surface 85 of the second recess 80 of the appendage outer box 51 are the second recess 40 of the circuit breaker outer box 11. Are adjacent to the long sides 41 and 42, the short side 44, and the arcuate surface 45, respectively. Further, the inner wall 86 of the second recess 80 of the appendage outer box 51 and the rib 87 face the inner wall 46 of the second recess 40 of the circuit breaker outer box 11 and the rib 47, respectively.
[0034]
In the circuit breaker 100 in which the circuit breaker 10 and the external attachment 50 are combined, the insulating plate material fitted in the first recess 20 of the breaker outer box 10 in FIGS. 30 is removed from the first recess 20 and fitted into the second recess 40.
[0035]
As a result of the insulating plate member 30 being removed from the first recess 20, the connection hole 27 in the first recess 20 of the circuit breaker outer box 11 is opened, and this connection hole 27 is also opened in the accessory outer box. The connection holes 67 in the first recesses 51 of the 51 face each other in an open state. A connecting member 90 is fitted into the connecting holes 27 and 67. The connecting member 90 connects the circuit breaker movable contact driving mechanism accommodated in the circuit breaker outer box 11 and the accessory moving contact driving mechanism accommodated in the accessory outer box 51, and one of them is connected to the other. Can be driven. Specifically, when the external attachment 50 is used in the first mode for driving the circuit breaker 10, for example, the external attachment 50 is accommodated in the attachment outer box 51 of the external attachment 50. The tripping device trips the accessory movable contact driving mechanism by an external control voltage, and the circuit breaker movable contact driving mechanism is driven via the connecting member 90 by the accessory movable contact driving mechanism. Further, when the circuit breaker 10 is used in the second mode for driving the external attachment 50, the tripping device housed in the breaker outer box 11 is driven by a circuit breaker movable contact due to overcurrent. The latching mechanism of the mechanism is operated, the circuit breaker movable contact driving mechanism operates the attachment moving contact driving mechanism via the connecting member 90, and the attachment moving contact is detached from the attachment fixing contact. Further, when the external attachment 50 is provided with the second attachment fixed contact and the second attachment movable contact, the second attachment is connected via the connecting member 90 by the breaker movable contact driving mechanism. The device movable contact is brought into contact with the second appendage fixed contact.
[0036]
The connecting member 90 includes a pivot 91, a connecting lever 92, and a pair of connecting pieces 93 and 94 located on both sides of the connecting lever 92. The pivot 91, the connecting lever 92, and the connecting pieces 93 and 94 are integrally formed with each other by, for example, an electrically insulating resin. Both ends of the pivot 91 are formed into a recessed hole 28 formed in the first recessed portion 20 of the circuit breaker outer box 11 and a recessed hole 68 formed in the first recessed portion 60 of the appendage outer box 51, respectively. As a result, the connecting lever 92 is rotatable about the pivot 91. One connecting piece 93 is engaged with a circuit breaker movable contact drive mechanism accommodated in the circuit breaker outer box 11 through a connection hole 27 formed in the first recess 20 of the circuit breaker outer box 11. The other connecting piece 94 is engaged with an attachment movable contact drive mechanism accommodated in the attachment outer box 51 through a connection hole 67 formed in the first recess 60 of the attachment outer box 51. The breaker movable contact driving mechanism and the accessory movable contact driving mechanism are coupled by the coupling pieces 93 and 94. When one of the circuit breaker movable contact driving mechanism and the accessory movable contact driving mechanism is driven, the connecting member 90 rotates about the pivot 91, and the other driving mechanism is rotated by the rotation of the connecting member 90. Is driven.
[0037]
The insulating member 30 is fitted into the second recess 40 of the circuit breaker outer box 11 after being removed from the first recess 20 of the circuit breaker outer box 11. This state is shown in FIGS. 3 (A) and 3 (B). In a state where the long sides 31 and 32 of the insulating plate 30 are inscribed in the long sides 41 and 42 of the second recess 40 and the short side 34 of the insulating plate 30 is inscribed in the short side 44 of the second recess 40, The insulating plate member 30 is fitted into the second recess 40. When the insulating plate member 30 is fitted into the second recess 40, the rib 47 formed in the second recess 40 is fitted into the through hole 38 of the insulating plate member 30, and the insulating plate member 30 is positioned and fixed.
[0038]
In the combination mode, the insulating plate 30 is fitted into the second recess 40 in such a manner that, for example, half of its thickness is exposed from the second recess 40 of the circuit breaker outer box 11. The exposed portion of the insulating plate member 30 is fitted into the second recess 80 of the opposing appendage outer box 51. Specifically, the long sides 31 and 32 of the insulating plate 30 are inscribed in the long sides 81 and 82 of the second recess 80, and the short side 34 of the insulating plate 30 is in the short side 84 of the second recess 80. The insulating plate 30 is also fitted into the second recess 80 so as to come into contact with the second recess 80. A rib 87 formed in the second recess 80 of the appendix outer box 51 faces the rib 47, and this rib 87 is also fitted into the through hole 38 of the insulating plate member 30 to position the insulating plate member 30.
[0039]
The insulating plate 30 fitted in the second recess 40 is located between the circuit breaker external terminal 19 and the appendage external terminal 59 and functions as an insulation barrier between them. The insulating plate 30 is attached to the first recess 20 of the circuit breaker outer box 11 and functions as an insulating cover for the connection hole 27 in a state where the external attachment 50 is not combined with the circuit breaker 10. When the shape appendage 50 is combined, it is attached to the second recess 40 without being discarded, and is used as an insulation barrier for the external terminals 19 and 59. As a result, it is possible to prevent generation of useless waste materials and to effectively use the insulating material resources.
[0040]
Moreover, in the circuit breaker 10 of Embodiment 1, the 1st recessed part 20 is formed in a 1st position, and the 2nd recessed part 40 is formed in a 2nd position, respectively, and the insulating board | plate material 30 is these recessed parts 20 or 40. The insulating member 30 can be easily attached to the first position or the second position by using the recesses 20 or 40. Further, the insulating plate member 30 is formed in a flat plate shape, and a through hole 36 is formed in a part thereof. The through hole 36 is closed by the circuit breaker outer box 11 at the first position, and the through hole is formed at the second position. 36, since the rib 47 of the circuit breaker outer box 11 is fitted into the insulating plate member 30 at the second position, the through hole 36 is blocked at the first position. Communication with the outside by 36 can also be reliably prevented. Further, in the circuit breaker 100 in which the circuit breaker 10 and the external attachment 50 are combined, the rib 47 of the breaker outer box 11 and the rib 87 of the appendage outer box 51 are both fitted into the through hole 36. As a result, the insulating plate 30 can be positioned more accurately.
[0041]
In the first embodiment, the first recess 20 and the second recess 40 including the connection hole 27 are formed on the right side surface 12 of the circuit breaker 10, and the left side surface 53 of the external attachment 50 is formed. The circuit breaker is formed in such a manner that the first recess 60 and the second recess 80 including the connecting hole 67 are formed and the right side surface 12 of the circuit breaker 10 and the left side surface 53 of the external attachment 50 are in contact with each other. Although the circuit breaker 100 is configured, the circuit breaker 100 may be configured such that the left side surface 13 of the circuit breaker 10 and the right side surface 52 of the external attachment 50 are in contact with each other. In this case, the first recess 20 and the second recess 40 including the connection hole 27 are formed in the left side surface 13 of the circuit breaker 10, and the connection hole is formed in the right side surface 52 of the external attachment 50. A first recess 60 and a second recess 80 including 67 are formed.
[0042]
Embodiment 2. FIG.
In the first embodiment, the first and second concave portions 20 and 40 of the circuit breaker outer box 11 are formed at positions separated from each other. In the second embodiment, the first concave portion 70a and the second concave portion are formed. 70b is formed continuously at a relatively close position, and when the external attachment 50A is combined with the circuit breaker 10A, the insulating plate 30A is rotated from the state fitted in the first recess 70a. The position of the insulating plate 30A can be changed more easily by simply fitting it into the second recess 70b.
[0043]
4 (A), 4 (B) and 4 (C) show a circuit breaker according to a second embodiment of the present invention, FIG. 4 (A) is a front view thereof, FIG. 4 (B) is a right side view thereof, FIG. C) is a cross-sectional view of the attachment portion 36 of the insulating plate 30A. 5A and 5B show an external attachment attached to the circuit breaker shown in FIGS. 4A and 4B. FIG. 5A is a left side view thereof, and FIG. Is a front view thereof. 6 (A), 6 (B), and 6 (C) are configured by combining the circuit breaker 10A shown in FIGS. 4 (A) and 4 (B) and the external attachment 50A shown in FIGS. 5 (A) and 5 (B). 6 shows a second embodiment of the circuit breaker according to the present invention, FIG. 6 (A) is a front view thereof, FIG. 6 (B) is a sectional view in the direction of the arrow along line BB in FIG. 6 (A), and FIG. 6C is a cross-sectional view showing an operation state of the attachment portion 36 of the insulating plate 30A.
[0044]
The circuit breaker 10 </ b> A of the second embodiment has one recess 70 on the right side surface 12 of the circuit breaker outer box 11. The recess 70 is formed by continuously forming a first recess 70a corresponding to the first recess 20 in the first embodiment and a second recess 70b corresponding to the second recess 40 in the first embodiment. It is a thing. The circuit breaker 10A according to the second embodiment is configured in the same manner as the circuit breaker 10 according to the first embodiment except for the concave portion 70, and the same portions are denoted by the same reference numerals and description thereof is omitted.
[0045]
The recess 70 includes a first recess 70a and a second recess 70b, and these recesses 70a and 70b are formed on the right side surface 12 of the circuit breaker outer box 11 in a form that is continuous with each other. The first recess 70a is in the first position on the right side surface 12 of the circuit breaker outer box 11, and the second recess 70b is in the second position. The recess 70 has an inner wall 76, which is formed across the first recess 70a and the second recess 70b. The inner wall 76 of the first recess 70a has a connection hole 77 and a recess hole. 78 is formed. The connection hole 77 is formed in a fan shape like the connection hole 27 of the first embodiment, and penetrates the right side wall of the circuit breaker outer box 11. The concave hole 78 is formed in a circular shape at the fan-shaped center of the connecting hole 77 in the same manner as the concave hole 28 of the first embodiment. The second recess 70 b is located adjacent to the external terminal 19. Furthermore, a through hole 79 is formed in the inner wall 76 of the recess 70 in FIG. The through hole 79 is located between the short side 74a and the short side 74b.
[0046]
The first recess 70a has an upper end opened to the upper end surface 14 of the circuit breaker outer box 10A, and has two long sides 71a and 72a and one short side 74a. The long sides 71a and 72a are opposed to each other, and the short side 74a is continuous with one end of the long side 72a and is bent at a substantially right angle from the long side 72a.
The second recess 70b has a lower end opening in the lower end surface 15 of the circuit breaker outer box 10A, and has two long sides 71b and 72b and one short side 74b. The long sides 71b and 72b are opposed to each other. The long side 72b is continuous with one end of the short side 74a of the first recess 70a and is bent at a substantially right angle from the short side 74a. The short side 74b is continuous with one end of the long side 71a of the first recess 70a, and is bent at a substantially right angle from the long side 71a. The long side 71b of the second recess 70b is continuous with the short side 74b and is bent at a right angle from the short side 74b.
[0047]
In the second embodiment, the insulating plate 30A is used. The insulating plate 30A has a substantially rectangular shape, but has a rotatable attachment portion 36 at one end. The insulating plate member 30A has two long sides 31 and 32 facing each other and two short sides 33 and 34 facing each other, and an attachment portion 36 is formed continuously from the long side 31 and the short side 34. Yes. A snap rib 37 is formed integrally with the attachment portion 36, and the snap rib 37 is fitted into the through hole 79 as shown in FIG. That is, the insulating plate member 30 </ b> A is rotatably supported by the inner wall 76 by the snap rib 37. The snap rib 37 has a cylindrical body 37a, a large-diameter portion 37b formed on the outer periphery of the cylindrical body 37a, and a slit 37c that divides the end of the cylindrical body 37a. The diameter is made larger than the through hole 79. The snap rib 37 is fitted into the through hole 79 in a state where the outer diameter of the cylindrical body 37a is reduced by the slit 37c. After the fitting, the snap rib 37 is retained in the through hole 79 by restoring the large diameter portion 37b. Is done.
[0048]
An external attachment 50A combined with the circuit breaker 10A of the second embodiment is shown in FIGS. This external attachment 50A has only the first concave portion 60 and does not form the second concave portion 80, except for the outer portion of the first embodiment shown in FIGS. 2 (A) and 2 (B). Since it is the same as the shaped appendage 50, the same parts are denoted by the same reference numerals, and description thereof is omitted.
[0049]
When the circuit breaker 10A of the second embodiment is used alone without the external attachment 50A being combined, as shown in FIG. 4B, the insulating plate 30A is the first of the breaker outer box 11. 1 is fitted into the first recess 70a. In the state shown in FIG. 4B, the long side 31, the long side 32, and the short side 34 of the insulating plate 30A are inscribed in the long sides 71a, 72a, and 74a of the first recess 70a, and the connecting hole 77 is formed. Used as an insulating cover to cover. In this state, the connecting hole 77 is blocked by the insulating plate 30 </ b> A, and the inside of the circuit breaker outer box 11 is prevented from being opened to the outside by the connecting hole 77.
[0050]
6A and 6B show a circuit breaker 100A according to the second embodiment in which the external attachment 50A shown in FIG. 5 is combined with the circuit breaker 10A according to the second embodiment. As in FIG. 3 (A), in FIG. 6 (A), an external attachment 50A is shown on the right side of the circuit breaker 10A with an interval, but in an actual combination form, The circuit breaker 10A is combined with the right side surface 12 of the circuit breaker outer box 11 in such a manner that the left side surface 53 of the appendage outer box 51 contacts.
[0051]
In this combination form, the position change is performed such that the insulating plate 30A is fitted into the second recess 70b in the second position of the circuit breaker outer box 11. When changing the position, first, the insulating plate 30A fitted in the first recess 70a is separated from the inner wall 76 and pulled out to a position where the insulating plate 30A comes out of the recess 70a as shown in FIG. 6C. 6C, the insulating plate 30A is rotated around the snap rib 37 and moved onto the second recess 70b. Subsequently, the insulating plate 30A is moved to the second recess 70b. It is pushed in and fitted into it. In this state, the long side 31, the long side 32, and the short side 34 of the insulating plate 30A are inscribed in the long sides 72b, 71b, and 74b of the second recess 70b, respectively. In this state, the insulating plate 30 </ b> A is adjacent to the external terminals 19 and 59 and is used as an insulating barrier between the external terminals 19 and 59.
[0052]
In the first recess 70a, the connecting hole 77 is opened by the rotation of the insulating plate 30A. This connection hole 77 is located at a position just opposite to the connection hole 67 of the external attachment 50A, and the same connection member 90 as shown in FIG. 3 is used, and the movable contact driving mechanism of the circuit breaker 10A and the external attachment The movable contact driving mechanism of the shape appendage 50A is connected by a connecting member 90.
[0053]
Also in the second embodiment, when the insulating plate 30A is fitted into the first recess 70a at the first position of the circuit breaker outer box 11, it functions as an insulating cover that covers the connecting hole 77, and the circuit breaker outer box 11 When fitted in the second recess 70b in the second position, it functions as an insulating barrier adjacent to the external terminal 19, and is selectively used as these insulating covers or insulating barriers, and is not discarded. Therefore, effective use of the insulating material can be achieved.
In the second embodiment, the position of the insulating plate 30A can be easily changed by rotating the insulating plate 30A around the snap rib 37.
[0054]
In the second embodiment, the insulating plate 30 is not removed from the circuit breaker outer box 11 even in the first position or the second position, so that the loss of the insulating plate 30 can be prevented, and the externally attached type is also provided. It can be prevented that the appendage 50A is combined with the circuit breaker 10A, the connection hole 77 is opened, and then forgetting to fit into the second recess 70b. Further, in the case where the insulating plate member 30 is formed in a flat plate shape and the snap ribs 37 are formed on one surface thereof, the other surface of the insulating plate member 30 is a flat surface.
[0055]
【The invention's effect】
As described above, in the circuit breaker of the present invention, the insulating plate covering the connection hole can be diverted as an insulating barrier for the external terminal, and can be effectively used without using the insulating plate as a waste material. Effective utilization of material resources can be achieved.
Further, in the circuit breaker according to the present invention in which an external attachment is combined with the circuit breaker, the insulating plate material used to cover the connection hole of the circuit breaker is used as an insulation barrier for the external terminal. The insulating plate material can be effectively used without making it a waste material, and the insulating material resource can be effectively used.
[Brief description of the drawings]
FIG. 1 is a diagram showing a first embodiment of a circuit breaker according to the present invention, FIG. 1 (A) is a front view thereof, and FIG. 1 (B) is a right side view thereof.
FIGS. 2A and 2B are diagrams showing an external attachment unit combined with the circuit breaker of Embodiment 1, FIG. 2A is a left side view thereof, and FIG. 2B is a front view thereof.
FIGS. 3A and 3B are diagrams showing a first embodiment of a circuit breaker according to the present invention in which a circuit breaker and an external attachment are combined. FIG. 3A is a front view thereof, and FIG. It is sectional drawing by the BB line of FIG. 3 (A).
4A and 4B are diagrams showing a circuit breaker according to a second embodiment of the present invention. FIG. 4A is a front view thereof, FIG. 4B is a right side view thereof, and FIG. It is sectional drawing of the attachment part of a board | plate material.
FIGS. 5A and 5B are diagrams showing an external attachment that is combined with a circuit breaker according to Embodiment 2, FIG. 5A is a left side view thereof, and FIG. 5B is a front view thereof.
FIGS. 6A and 6B are diagrams showing Embodiment 2 of a circuit breaker according to the present invention in which a circuit breaker and an external attachment are combined. FIG. 6A is a front view thereof, and FIG. FIG. 6A is a cross-sectional view taken along the line BB in FIG. 6A, and FIG.
[Explanation of symbols]
10, 10A circuit breaker, 11 breaker outer box, 12 right side,
13 Left side, 19 Circuit breaker external terminal,
20 first recess, 21, 22 long side, 23, 24 short side,
26 inner walls, 27 connecting holes,
30, 30A Insulating plate material, 31, 32 long side, 33, 34 short side,
40 second recess, 41, 42 long side, 43, 44 short side,
50 External attachment, 51 Outer case, 52 Right side, 53 Left side,
60 1st recessed part, 61, 62 long side, 63, 64 short side,
66 inner wall, 67 connecting hole,
70 recess, 70a first recess, 70b second recess,
71a, 71b, 72a, 72b long side,
74a, 74b short side, 76 inner wall, 77 connecting hole,
80 Second recess, 81, 82 long side, 84 short side, 90 connecting member.

Claims (12)

A circuit breaker that can be combined with external attachments, equipped with a breaker outer box,
The breaker outer box accommodates a fixed contact, a movable contact, a movable contact driving mechanism for separating the movable contact from the fixed contact, and a tripping device for the movable contact drive mechanism. A connection hole for connecting the movable contact driving mechanism to the external attachment is formed in the outer box, and an external terminal connected to the fixed contact or the movable contact is provided outside the breaker outer box. Has been placed,
Further, an insulating plate is attached to the circuit breaker outer box, and the insulating plate is configured to be attachable to both the first position for closing the connection hole and the second position adjacent to the external terminal. A circuit breaker, wherein the circuit breaker is disposed at one of the first position and the second position. 2. The circuit breaker according to claim 1, wherein the insulating plate functions as a connection hole cover that is disposed at the first position and closes the connection hole when the external attachment is not combined. A circuit breaker which is arranged at the second position and functions as an insulating barrier for the external terminal when an external attachment is combined. 3. The circuit breaker according to claim 2, wherein the first position is formed with a first recess into which the insulating plate can be fitted on an outer surface of the circuit breaker outer box. A circuit breaker characterized in that a second recess capable of fitting the insulating plate material into the outer surface of the breaker outer box is formed at a position. 4. The circuit breaker according to claim 3, wherein the insulating plate material is formed in a flat plate shape, has a through hole in a part thereof, and the insulating plate material is fitted in the first position. In the state where the through hole is closed by the circuit breaker outer box and the insulating plate is fitted in the second position, the rib formed on the circuit breaker outer box at the second position is the through hole. A circuit breaker that fits into the circuit. 3. The circuit breaker according to claim 2, wherein the insulating plate member has a snap rib snap-fitted to the breaker outer box, and the first position is obtained by rotating about the snap rib. And any one of the second positions can be selected. A circuit breaker comprising a circuit breaker and an external appendage combined with the circuit breaker,
The circuit breaker has a circuit breaker outer box. Inside the circuit breaker outer box, a circuit breaker fixed contact, a circuit breaker movable contact, and the circuit breaker movable contact are separated from the circuit breaker fixed contact. A circuit breaker movable contact driving mechanism and a tripping device for contacting the same are accommodated, and a circuit breaker external terminal connected to the circuit breaker fixed contact or circuit breaker movable contact is disposed outside the circuit breaker outer box,
The external attachment has an accessory outer box, and the accessory outer box includes an accessory fixed contact, an accessory movable contact, and the accessory movable contact with respect to the accessory fixed contact. An accessory movable contact drive mechanism that is separated and connected is accommodated, and an accessory external terminal connected to the accessory fixed contact or the accessory movable contact is disposed outside the accessory outer box,
The circuit breaker outer box and the accessory outer box are each formed with a connection hole for connecting the circuit breaker movable contact driving mechanism and the accessory movable contact driving mechanism,
Further, an insulating plate material is attached to the circuit breaker outer box, and this insulating plate material is arranged at a second position between the circuit breaker external terminal and the external device external terminal and functions as an insulation barrier between them. However, the circuit breaker is configured to be attachable to a first position where the connecting hole of the outer box of the breaker is closed. 7. The circuit breaker according to claim 6, wherein a connecting member is disposed between the breaker outer box and the accessory outer box, and the connecting member passes through the connecting holes, and the breaker movable contact driving mechanism. A circuit breaker characterized by connecting an appendage movable contact drive mechanism. 8. The circuit breaker according to claim 7, wherein a first recess into which the insulating plate material can be fitted is formed at the first position on an outer surface of the breaker outer box, and the second A circuit breaker having a second recess into which the insulating plate material can be fitted. 9. The circuit breaker according to claim 8, wherein a first recess corresponding to the first recess is formed on an outer surface of the appendage outer box, and a second corresponding to the second recess is formed. A circuit breaker having a recess. 9. The circuit breaker according to claim 8, wherein the insulating plate material is formed in a flat plate shape, has a through hole in a part thereof, and the insulating plate material is fitted in the second recess. The circuit breaker characterized by the rib formed in each of an external box and an accessory external box fitting in the said through-hole. 7. The circuit breaker according to claim 6, wherein the insulating plate member has a snap rib snap-fitted to the breaker outer box, and the second position is obtained by rotating about the snap rib. And a circuit breaker capable of changing a position between the first position and the first position. 12. The circuit breaker according to claim 11, wherein the insulating plate is formed in a flat plate shape, and the snap rib is formed on one surface thereof.

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