JP6827883B2 - Circuit breaker - Google Patents

Description

The present invention relates to, for example, a circuit breaker installed in a distribution board and used when branching an electric circuit.

When a circuit breaker in which the power supply side terminal is arranged on the rear side and the load side terminal is arranged on the front side is installed in the distribution board, it is generally performed via a mounting panel. At that time, the operation of connecting the power supply side terminal to the main bar arranged on the mounting panel in the distribution board by sliding backward on the mounting panel is also performed and mounted.
As a conventional structure for fixing this circuit breaker to the mounting panel, there is a structure in which a slit is provided in the mounting panel and a hook piece for hooking on the slit is provided on the bottom surface of the circuit breaker. A structure is adopted in which the circuit breaker is pushed backward to be hooked on the slit after the hook piece is projected to the lower side of the mounting panel.

However, the circuit breaker is not fixed in this state. Therefore, for example, as described in Patent Document 1, the circuit breaker is provided with a lock lever that is embedded in the main body case / protrudes from the main body case by sliding operation in the vertical direction, and hooks the slit and the hook piece. In the stopped state, the lock lever is slid downward to protrude from the main body case, and the lock lever and the front end of the slit are brought into contact with each other so that the movement to the front side of the lock lever is restricted.

Japanese Unexamined Patent Publication No. 2012-234711

In the configuration described in Patent Document 1, the circuit breaker assembled to the mounting panel can be fixed to the mounting panel and prevented from coming off by operating the lock lever. However, due to variations in the shape of the slits formed on the mounting panel for mounting, the mounted circuit breaker may move back and forth, the locking structure with the mounting panel by the lock lever is released, and the circuit breaker is cut off. The vessel sometimes came off.

Therefore, in view of such a problem, the present invention provides a circuit breaker having a fixed structure capable of maintaining the hooked state so that the mounted circuit breaker does not easily come off even if the slit shape of the mounting panel varies. The purpose is.

In order to solve the above problem, in the invention of claim 1, the power supply side terminal is arranged on the back surface of the main body case, while the load side terminal is arranged on the front surface of the main body case, and a hook-shaped hook for attaching to the mounting panel is provided. A stop piece is projected downward from the bottom surface of the main body case, and a lock member is provided at the bottom of the main body case so as to project downward from the bottom surface of the main body case and have a lock portion for fixing the main body case to the mounting panel. The hook piece is inserted through the slit provided in the mounting panel, the hook piece is hooked on one end of the slit, and the lock portion is positioned in the slit so as to come into contact with the other end of the slit. It is a circuit breaker fixed to the mounting panel by, and the lock part can slide up and down between the lock position that protrudes downward from the bottom of the main body case and the unlock position that is embedded in the main body case. In addition, the lock member is provided with a hanging piece that comes into contact with the side portion of the mounting panel in front of the lock portion to prevent the main body case from moving backward.
According to this configuration, the circuit breaker fixed to the mounting panel is prevented from moving forward by the lock portion and moving backward by the hanging piece, so that the size of the slit formed in the mounting panel is large. Even if there are variations, the circuit breaker can be fixed in a stable state and will not come off.

The invention of claim 2 is characterized in that, in the configuration according to claim 1, the lock member is provided with elastic means for holding a state at both a lock position and an unlock position. ..
According to this configuration, the lock member is held in a state at both the lock position and the unlock position, so that it is easy to handle during the mounting operation.

According to the invention of claim 3, in the configuration according to claim 1 or 2, the hanging piece has a length covering the side portion of the mounting panel, and the width of the portion covering the side portion is the width of the main body case. It is characterized by having a width of one half or more.
According to this configuration, even if the mounting panel is made of metal, more than half of the side portion is covered with a hanging piece, so an electric wire such as a branch wiring connected to the load side terminal of the circuit breaker is mounted. When routing to the back side of the panel, it is difficult for the electric wire to come into direct contact with the mounting panel, and insulation can be improved.

According to the present invention, in the circuit breaker fixed to the mounting panel, the lock portion prevents the circuit breaker from moving forward, and the hanging piece prevents the circuit breaker from moving backward. Therefore, the size of the slit formed in the mounting panel is large. Even if there are variations, the circuit breaker can be fixed in a stable state and will not come off.

An example of the circuit breaker according to the present invention is shown, and it is a perspective explanatory view of the state attached to the attachment panel. It is a side view of the circuit breaker of FIG. It is an enlarged view of part A, and is the explanatory view which see through the lock member in a locked state. It is an enlarged view of part A, and is the explanatory view which see through the lock member in an unlocked state. The front view of the circuit breaker of FIG. 1 is shown, and the state in which two circuit breakers are arranged side by side is shown. It is a front view of the circuit breaker which shows the modification of the lock member.

Hereinafter, embodiments embodying the present invention will be described in detail with reference to the drawings. 1 and 2 show an example of the circuit breaker 1 according to the present invention, FIG. 1 is a perspective explanatory view of a state where the circuit breaker 1 is attached to the mounting panel 20, and FIG. 2 is a side view of the circuit breaker 1 of FIG.
The circuit breaker 1 is provided with a handle 7 that can be rotated in the front-rear direction on the upper surface of a main body case 4 formed by assembling a pair of left and right cases made of synthetic resin. Then, by rotating the handle 7, an opening / closing mechanism (not shown) incorporated in the main body case 4 operates, and an electric path arranged between the power supply side terminal 2 and the load side terminal 3 described later is operated. Is configured to be connected / released. Further, an overcurrent cutoff mechanism (not shown) is provided in the main body case 4, and is configured to shut off and open the opening / closing mechanism when an overcurrent is detected.

Further, on the rear surface of the main body case 4, a power supply side terminal 2 having plug-in type terminals P1, P2, and P3 provided in a row in the vertical direction is arranged. Each terminal P1 to P3 is formed by cutting out a U-shape penetrating the main body case 4 in the left-right direction, and is formed by a main bar (not shown) arranged in a distribution board or the like, or the main trunk thereof. A branch bar (not shown) branched from the bar can be inserted and connected.

On the other hand, an inclined surface that inclines downward toward the front side is formed on the front surface of the circuit breaker 1, and three terminals L1 and L2 into which a branch wiring (not shown) can be inserted and connected are formed on the inclined surface. , L3 (not shown because the terminal L3 is covered by the cover member 10) is provided in a row in the inclined direction, and the load side terminal 3 is arranged.
Each terminal L1 to L3 has a terminal hole 5 into which a branch wiring can be inserted in an internal direction orthogonal to an inclined surface, and a branch inserted from the terminal hole 5 is inserted in the main body case 4 inside each terminal hole. Terminal fittings (not shown) to which the wiring is connected are arranged. This terminal fitting consists of quick-connect terminals, and the inserted branch wiring is connected to the terminal fitting without a separate connection operation.

Then, on the bottom surface of the main body case 4, a set of hook-shaped hook pieces (front hook piece 8 and rear hook piece 9) that are bent rearward to be hooked on the mounting panel 20 are downwardly bent. The lock member 30 is projected and is arranged at the front end of the bottom of the main body case 4.

FIG. 3 is an enlarged view of part A, showing a state in which the locked member 30 in the locked state is seen through (in FIG. 3, the hatched member is the lock member 30).
The front end of the bottom of the main body case 4 is open downward, and a part of the lock member 30 is housed as shown in FIG. An operation window 26 (shown in FIG. 1) is opened at the lower part of the front surface of the main body case 4, and an operation piece 31 for operating the lock member 30 is exposed.

The lock member 30 is made of synthetic resin, and the upright piece 30a having the operation piece 31 at the upper end and the hanging piece 30b forming the hanging piece 30b that abuts on the side of the mounting panel 20 is exposed on the front surface of the main body case 4. The back of the standing piece 30a is housed in the main body case 4, and the lock portion 32 is exposed downward from the inside of the main body case 4, and the upper part of the lock portion 32 is formed on the back in a U-shape in the vertical direction. It has a base portion 30c provided with 33.

The side portion of the mounting panel 20 is bent in a U shape to form a side surface 20a having a constant height, and as shown in FIG. 3, the hanging piece 30b has a side surface 20a with the lock member 30 in the locked position. It is formed with a length reaching the lower end of the.
Further, as shown in the front view of the circuit breaker 1 of FIG. 5, the width W2 of the hanging piece 30b is formed to have a uniform width from the operation piece 31, which is slightly smaller than half the width W1 of the circuit breaker 1. It is formed with a large width so as to cover the side portion of the mounting panel 20.
The lock member 30 is housed so that the base portion 30c is guided by a guide groove (not shown) formed on the main body case 4 side and slides in the vertical direction without tilting back and forth.

On the other hand, 10a is a screw hole penetrating the main body case 4 in the lateral direction in order to connect and fix a pair of left and right cases constituting the main body case 4, and 10b is a cylinder forming the screw hole 10a. .. It is formed so as to cross the inside of the main body case 4. The elastic piece 33 has a protrusion 33a in the center of the back surface, and the protrusion 33a is arranged so as to abut and engage with the tubular body 10b.
As a result, when the lock member 30 is slid up and down, the protrusion 33a of the elastic piece 33 engages with the tubular body 10b on the way, and both the unlock position which is the upper position and the lock position which is the lower position The position of the lock member 30 is held by.

Further, the mounting panel 20 is provided with a front slit 21 through which the front hook piece 8 can be inserted and a rear slit 22 through which the rear hook piece 9 can be inserted. The front slit 21 and the rear slit 22 are the circuit breaker 1 A plurality of them are provided at predetermined intervals in the parallel direction of the above. The front-rear length of the front slit 21 is equal to the distance between the lock portion 32 at the lock position and the bent portion of the front hook piece 8 in the front-rear direction.

Here, the operation of attaching / detaching the circuit breaker 1 having the lock member 30 to / from the mounting panel 20 will be described.
First, the front hook piece 8 is inserted into the front slit 21, and the rear hook piece 9 is inserted into the rear slit 22. At this time, if the lock portion 32 of the lock member 30 is not housed in the main body case 4 and protrudes downward, the lock portion 32 abuts on the upper surface of the mounting panel 20 and is pressed against the main body case 4. Get in. That is, the lock member 30 slides upward and moves to the unlocked position. FIG. 4 shows a state in which the lock member 30 has moved upward.

Then, when the hook pieces 8 and 9 are inserted into the slits 21 and 22, the circuit breaker 1 is pushed backward to operate. By this slide operation, the main bar arranged on the mounting panel 20 enters the terminals P1 to P3 of the power supply side terminal 2 and the power supply side terminal 2 is connected. Further, the hook pieces 8 and 9 are hooked to the ends of the slits, respectively.
At the same time, the hanging piece 30b of the lock member 30 comes into contact with the side surface 20a whose back portion is the end portion of the mounting panel 20.

When pushed into this position, the end of the front slit 21 is arranged directly under the lock portion 32 so that it can protrude downward. When the operation piece 31 is operated to slide downward (lock operation), the lock portion is locked. 32 enters the front slit 21 and the forward movement of the circuit breaker 1 is prohibited.
In addition, the hanging piece 30b prohibits the circuit breaker 1 from moving backward regardless of the lock operation.

On the other hand, when removing the circuit breaker 1 from the mounting panel 20, the operation piece 31 is operated upward to move the lock portion 32 to the unlocked position. Then, as shown in FIG. 4, the interference between the lock portion 32 and the front end of the front slit 21 is released. That is, the circuit breaker 1 is released from being fixed to the mounting panel 20, and the circuit breaker 1 can be pulled out to the front side. By pulling out in this way, the hooked state of the front hooking piece 8 and the front slit 21 and the hooking state of the rear hooking piece 9 and the rear slit 22 are simultaneously released.
After that, when the circuit breaker 1 is lifted, the hook pieces 8 and 9 are pulled out from the slits 21 and 22 and removed.

As described above, the circuit breaker 1 fixed to the mounting panel 20 is formed on the mounting panel 20 because the lock portion 32 prevents the circuit breaker 1 from moving forward and the hanging piece 30b prevents the circuit breaker 1 from moving backward. Even if the sizes of the slits 21 and 22 vary, the circuit breaker 1 can be fixed in a stable state and will not come off.
Further, due to the action of the elastic piece 33, the lock member 30 is held in a state at both the locked position and the unlocked position, so that it is easy to handle during the mounting operation.
Further, even if the mounting panel 20 is made of metal, the side portion on which the circuit breaker 1 is arranged is covered with the hanging piece 30b, so that the electric wire such as the branch wiring connected to the load side terminal 3 of the circuit breaker 1 When the wire is routed to the back side of the mounting panel 20, it is difficult for the electric wire to directly touch the mounting panel 20, and the insulation property can be improved.

The configuration of the circuit breaker 1 of the present invention is not limited to the embodiment of the above embodiment, and the circuit breaker 1 is fixed to the lock member 30 and the mounting panel 20 as well as the overall structure of the circuit breaker 1. The configuration and the like according to the above can also be appropriately changed as necessary without departing from the spirit of the present invention.
For example, in the above embodiment, the width of the hanging piece 30b is formed to be the same width as the operation piece 31 and slightly larger than half the width W1 of the circuit breaker 1, but the circuit breaker 1 of FIG. As shown in the front view, the width W2 of the hanging piece 30b may be wider than the operation piece 31 to have a size close to the width W1 of the circuit breaker 1. By doing so, it is possible to surely prevent the electric wire from coming into contact with the mounting panel.
Further, the hanging piece 30b is formed so as to hang below the operation piece 31, but if the side portion 20a of the mounting panel 20 is not at that position, it may be bent and formed in accordance with the position of the side portion 20a.
Further, although two hook pieces 8 and 9 are provided on the bottom surface of the main body case 4, one may be provided.

1 ・ ・ Circuit breaker, 2 ・ ・ Power supply side terminal, 3 ・ ・ Load side terminal, 4 ・ ・ Main body case, 8 ・ ・ Front hooking piece (hanging piece), 9 ・ ・ Rear hooking piece (hooking piece) Piece), 20 ... Mounting panel, 20a ... Side, 21 ... Front slit (slit), 22 ... Rear slit (slit), 26 ... Operation window, 30 ... Lock member, 30b ... Hanging piece, 31 ... Operation piece, 32 ... Lock part, 33 ... Elastic piece (elastic means).

Claims (3)

While the power supply side terminal is arranged on the back surface of the main body case, the load side terminal is arranged on the front surface of the main body case, and a hook-shaped hook piece for attaching to the mounting panel projects downward from the bottom surface of the main body case. In addition, a lock member is provided at the bottom of the main body case, which protrudes downward from the bottom surface of the main body case and includes a lock portion for fixing the main body case to the mounting panel.
The hook piece is inserted through a slit provided in the mounting panel, the hook piece is hooked on one end of the slit, and the lock portion is positioned in the slit to hit the other end of the slit. A circuit breaker that is fixed to the mounting panel by being brought into contact with it.
The lock portion is slidable up and down between a lock position protruding downward from the bottom surface of the main body case and an unlock position embedded in the main body case.
A circuit breaker characterized in that the lock member is provided with a hanging piece that comes into contact with a side portion of the mounting panel in front of the lock portion to prevent the main body case from moving rearward. The circuit breaker according to claim 1, wherein the lock member is provided with elastic means for holding a state at both the lock position and the unlock position. The hanging piece has a length that covers the side portion of the mounting panel, and the width of the portion that covers the side portion has a width of one half or more of the width of the main body case. The circuit breaker according to claim 1 or 2.

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