JP2022175404A - circuit breaker for wiring - Google Patents

Abstract

To comparatively easily enable an attachment of a cover at an appropriate position to a base, and to support a yoke at a position where a tripping function can be sufficiently exerted by attaching the cover to the base at the appropriate position.SOLUTION: A circuit breaker comprises: a housing having a base and a cover; and an instant tripping device having a yoke. The base supports a lower part of the yoke of the instance tripping device so as to nip them from front and rear directions, and the cover supports an upper part of the yoke of the instant tripping device so as to nip them from the front and rear directions. On a front surface side or a rear surface side of the cover, a contact part 31 coming into contact with an inner surface of the base is provided.SELECTED DRAWING: Figure 9

Description

The present invention relates to circuit breakers for wiring.

As can be understood from Patent Document 1, the case that forms the outer shell of the circuit breaker for wiring is generally of a top-bottom split type in which a cover is placed over the base. Such bases and covers are made of resin, and are molded by pouring heat-melted resin into a mold.

JP-A-2000-251606

By the way, the heated resin shrinks slightly when cooled. In a conventional product, if the base is deformed due to contraction, there is a risk that the yoke will be placed in a tilted state. In addition, with the conventional cover, it is not possible to correct the tilted yoke placed on the base to an appropriate position. On the other hand, if the yoke is not in an appropriate position, there is a risk that the tripping function will not be fully exhibited.

The inventor of this case tried to solve the problem by earnestly studying this point. The problem to be solved by the present invention is that the cover can be attached to the base at an appropriate position relatively easily, and by attaching the cover to the base at an appropriate position, the tripping function can be fully exhibited. It is to be able to support the yoke at a position where it is possible.

In order to solve the above-mentioned problems, there is provided a circuit breaker for wiring comprising a housing having a base and a cover, and an instantaneous tripping device having a yoke, wherein the base sandwiches the lower portion of the yoke of the instant tripping device from the front and rear directions. The cover supports the upper part of the yoke of the instantaneous tripping device so as to sandwich the upper part of the yoke of the instantaneous tripping device from the front and back direction, and the front or rear side of the cover is provided with an abutting part that abuts against the inner surface of the base. Use circuit breaker for wiring.

In addition, the base includes a bottom surface, side walls extending vertically from left and right ends of the bottom surface, and partition walls for separating the terminals, and the abutting portion is forward or rearward with respect to at least one of the side walls or the partition walls of the base. It is preferable to have a configuration in which the contact is made from the contact point.

Further, it is preferable that the contact portion is positioned on one side of the shaft of the handle and the yoke is positioned on the other side of the shaft of the handle.

Further, it is preferable that the cover is provided with a partition portion for partitioning the terminal portion and the inside of the housing, and a contact portion is provided on the terminal portion side of the partition portion.

In the present invention, the cover can be attached to the base at an appropriate position relatively easily, and by attaching the cover to the base at an appropriate position, the yoke is supported at a position where the tripping function can be fully exhibited. can do.

It is a perspective view of the circuit breaker for wiring in embodiment. Fig. 2 is an exploded perspective view of the circuit breaker for wiring shown in Fig. 1; FIG. 2 is a partially cut perspective view of the circuit breaker for wiring shown in FIG. 1 ; FIG. 2 is a partially cut side view of the circuit breaker for wiring shown in FIG. 1 ; It is a perspective view of an instantaneous tripping device. However, the coil is omitted. It is the perspective view which looked at the cover from the diagonally downward direction. FIG. 7 is a cross-sectional view taken along line VII of FIG. 6; However, only part of the cover is shown. FIG. 5 is a cross-sectional view of the circuit breaker cut along the IX-IX cross section shown in FIG. 4; FIG. 9 is a partial enlarged view of the upper left portion of FIG. 8; It is sectional drawing of the circumference|surroundings of an insertion part cut so that the shape of a notch part can be seen.

Modes for carrying out the invention are shown below. As can be seen from FIGS. 1 to 4, the circuit breaker 1 for wiring according to this embodiment includes a housing 10 having a base 20 and a cover 30, and an instantaneous tripping device 70 having a yoke 71. and has. In this wiring breaker 1, the base 20 supports the lower portion of the yoke 71 of the instantaneous trip device 70 so as to sandwich the lower portion of the yoke 71 of the instantaneous trip device 70 from the front and rear direction, and the cover 30 sandwiches the upper portion of the yoke 71 of the instantaneous trip device 70 from the front and rear direction. The cover 30 has a contact portion 31 on the front side or rear side of the cover 30 to contact the inner side surface of the base 20 . Therefore, the cover 30 can be attached to the base 20 at an appropriate position in the front-rear direction relatively easily. Moreover, by attaching the cover 30 to the base 20 at an appropriate position, the yoke 71 can be supported at a position where the tripping function can be fully exhibited.

A housing 10 forming an outer shell of the circuit breaker 1 of the embodiment includes a base 20 to be attached to an installation surface, and a cover 30 that covers the upper part of the base 20 . The circuit breaker for wiring 1 has terminal portions 51 to which wires can be connected on the front side and the rear side. You can switch. In order to enable this switching to be performed manually, the circuit breaker 1 for wiring is provided with a handle 61, and whether or not to break is determined by tilting the rotatable handle 61 forward or rearward. can be switched.

Inside the housing 10 of the circuit breaker 1 for circuit breaker 1, there are housed various devices that operate to function the circuit breaker 1, one of which is an instantaneous tripping device 70 (Fig. reference). This instantaneous tripping device 70 functions to cut off a large current such as a short-circuit current when it occurs. It works.

The instantaneous tripping device 70 of the embodiment has a dashpot 72 having a pole piece 73, a trigger lever 74, etc. attached to a yoke 71, and a coil 75 is wound around the periphery thereof. When a large current such as a short-circuit current flows through the coil 75, the instantaneous tripping device 70 draws the pole piece 73 into the dashpot 72 against an instantaneous spring (not shown) and moves the trigger lever 74 to perform an instantaneous tripping operation. I do.

The yoke 71 of the instantaneous tripping device 70 is attached to the housing 10 . The upper portion of the yoke 71 is supported by the yoke support portion 39 provided in the front and rear direction.

With the above-described configuration, the yoke 71 can be firmly supported. have a nature. However, the state of the yoke 71 after the base 20 and the cover 30 are screwed together cannot be grasped. Therefore, in order to facilitate appropriate relative positions of the cover 30 and the base 20 in the front-rear direction, the circuit breaker 1 according to the embodiment includes a He is trying to provide the contact part 31 contact|abutted to the front-back direction with respect to the side surface (refer FIG.6 and FIG.7). If the cover 30 is fixed to the base 20 with the contact portion 31 in contact with the inner surface of the base 20 in the front-rear direction, the yoke 71 is prevented from tilting in the front-rear direction more than expected. can do.

Of course, it is also possible to adopt a configuration in which the rear surface side of the cover 30 is provided with the contact portion 31 that contacts the inner surface of the base 20 in the front-rear direction. Even in this case, if the cover 30 is fixed to the base 20 with the contact portion 31 in contact with the inner surface of the base 20 in the front-rear direction, the yoke 71 will tilt in the front-rear direction more than expected. can be suppressed.

Preferably, the contact portion 31 is positioned on one side of the shaft 62 of the handle 61 and the yoke 71 is positioned on the other side of the shaft 62 of the handle 61 . By doing so, the abutment portion 31 can be formed at a position away from the instantaneous tripping device 70 , and a contact space can be secured without interfering with the instant tripping device 70 .

By the way, in the embodiment, the base 20 includes a bottom surface 21, side walls 22 vertically extending from the left and right ends of the bottom surface 21, and partition walls 23 that partition the terminals. The contact portion 31 that contacts the inner side surface of the base 20 contacts at least one of the side wall 22 and the partition wall 23 of the base 20 from behind (see FIGS. 8 and 9). This is because the contact portion 31 is provided on the front side of the cover 30 , and when the contact portion 31 is provided on the rear side of the cover 30 , the contact portion 31 is formed by At least one of 22 and partition wall 23 may be abutted from the front.

As described above, the base 20 includes a bottom surface 21, side walls 22 extending vertically from the left and right ends of the bottom surface 21, and partition walls 23 for separating terminals. If it is configured to abut on at least one of the partition walls 23 from the front or rear, it is possible to easily secure a portion to abut on the abutment portion 31 on the side of the base 20 .

In the example shown in FIG. 9, the portion of the partition wall 23 that contacts the contact portion 31 is a surface facing the rear direction, and the side wall 22 of the side wall 22 projects inward from the portion located on the side of the terminal portion 51 . The surface of the projecting portion 24 formed in the rearward direction.

In addition, in the embodiment, the cover 30 is provided with the partition portion 32 that partitions the terminal portion 51 and the inside of the housing 10, but the contact portion 31 is provided on the terminal portion 51 side of the partition portion 32 ( 6 to 9). This is because if the contact portion 31 is formed in the partition portion 32 , it can be easily brought into contact with at least one of the side wall 22 and the partition wall 23 of the base 20 . Further, by forming the contact portion 31 on the terminal portion 51 side of the partition portion 32 , it is possible to avoid the contact portion 31 from hindering the arrangement of devices in the internal space of the housing 10 . In the examples shown in FIGS. 8 and 9, the contact portion 31 is formed on the terminal portion 51 side of the partition portion 32 on the power supply side.

In more detail, in the embodiment, the projecting contact portions 31 are formed so as to extend forward from both ends of the partition portion 32 . Further, the contact portion 31 is configured such that the vertical direction is the longitudinal direction. Therefore, when the contact portion 31 is brought into contact with the base 20, the load applied to the base 20 and the partition portion 32 can be dispersed.

The partition part 32 of the embodiment has a plurality of notch-like parts in order to provide a plurality of ventilation parts 33. By doing so, it is possible to prepare for an abnormal situation such as an arc. can be done.

By the way, the dashpot 72, the trigger lever 74, etc. are connected to the yoke 71 of the embodiment. When the dashpot 72 is fixed to the yoke 71, the dashpot 72 is fixed to the dashpot fixing piece 76 provided on the yoke 71. The dashpot 72 is inserted into the dashpot 77 and fixed. When fixing the dashpot 72 and the dashpot fixing piece 76 while the dashpot 72 is inserted through the insertion hole 77, soldering may be used. Therefore, it is preferable that the insertion hole 77 is provided with a portion whose diameter increases in the direction of penetration.

In the example shown in FIG. 10, a notch portion 78 is provided so that the diameter of the insertion hole 77 increases downward from the middle.

Although the present invention has been described above using the embodiments as examples, the present invention is not limited to the above-described embodiments, and various aspects are possible.

1 Circuit breaker 10 Case 20 Base 21 Bottom surface 22 Side wall 23 Partition wall 30 Cover 31 Contact part 32 Partition part 61 Handle 62 Shaft 70 Instantaneous tripping device 71 Yoke

Claims (4)

A circuit breaker for wiring comprising a housing comprising a base and a cover, and an instantaneous tripping device comprising a yoke,
The base supports the lower part of the yoke of the instantaneous tripping device so as to sandwich it from the front and back direction,
The cover supports the upper part of the yoke of the instantaneous tripping device so that it is sandwiched from the front and back,
A circuit breaker for wiring having a contact portion contacting the inner side surface of a base on the front side or the rear side of a cover. The base has a bottom surface, side walls extending vertically from the left and right ends of the bottom surface, and partition walls separating the terminals,
2. The circuit breaker for wiring according to claim 1, wherein the abutting portion abuts on at least one of the side wall of the base and the partition from the front or rear. 3. The circuit breaker for wiring according to claim 2, wherein the contact portion is located on one side of the shaft of the handle, and the yoke is located on the other side of the shaft of the handle. The cover has a partition that separates the terminals from the inside of the housing.
4. The circuit breaker for wiring according to claim 3, wherein a contact portion is provided on the terminal portion side of the partition portion.

Images