JP6847786B2 - Circuit breaker - Google Patents

Description

The present invention relates to, for example, a circuit breaker that is assembled on a distribution board and used when branching an electric circuit.

When installing 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 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 embedded in the main body case / protruding from the main body case by sliding operation in the vertical direction to hook the slit and the hook piece. In this 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, it is difficult to determine whether the hooking piece is securely hooked on the slit of the mounting panel, and even if the circuit breaker is mounted in an insufficient state, it is difficult to distinguish it from the outside, and the hooking is insufficient. In some cases, the stopped state was left unattended.

Therefore, in view of such a problem, the present invention considers a circuit breaker that can be discriminated from the appearance of the mounted circuit breaker when the hook piece of the circuit breaker is not securely hooked on the slit of the mounting panel. The purpose is to provide a vessel.

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 the device has a hook shape for mounting on the mounting panel. A locking piece is projected downward from the bottom 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 of the main body case and fix the main body case to the mounting panel. It is provided, and the hook piece is inserted through the slit provided in the mounting panel, the hook piece is hooked at one end of the slit, and the lock piece is positioned in the slit and brought into contact with the other end of the slit. This is a circuit breaker fixed to the mounting panel, and the lock member is assembled to the main body case via an urging means so as to project downward, and is moved upward to be stored in the main body case. While the lock piece is provided with the operation piece, the lock piece has a lock piece main body that abuts and interferes with the other end of the slit and a protrusion formed at the lower end of the lock piece main body, and protrudes from the bottom surface of the main body case to make the lock piece main body. It is characterized in that it can slide up and down between the lock position that interferes with the slit and the unlock position that is embedded in the main body case and only the protrusion protrudes.
According to this configuration, the circuit breaker fixed to the mounting panel can be fixed to the circuit breaker and can be prevented from coming off because the circuit breaker is prevented from moving forward due to the interference of the lock piece with the other end of the slit. At the unlocked position, the protrusion of the lock piece slightly protrudes from the bottom of the main body case. Therefore, if the circuit breaker is not completely mounted, the protrusion that is not in the slit is located on the mounting panel. Due to the action, the appearance becomes slightly floating, and it is easy to determine whether the circuit breaker is improperly installed.
Since the lock member is always urged downward, the lock operation is automatically performed at the lock position where the lock piece enters the slit. Therefore, it can be easily grasped that the lock has been made.

The invention according to claim 2 is characterized in that, in the configuration according to claim 1, the protrusion formed at the lower end of the lock piece body is formed in a hemispherical shape.
According to this configuration, since the protrusion formed on the lock piece main body is hemispherical, it is slippery and does not get caught in the mounting panel or the like during the lock operation / unlock operation and is not difficult to operate.

The invention of claim 3 is characterized in that, in the configuration according to claim 1 or 2, the amount of protrusion of the protrusion from the bottom surface of the main body case at the unlocked position is 0.3 to 1 mm.
According to this configuration, the amount of protrusion of the lock member at the unlocked position is small, and when the circuit breaker is removed, the protrusion does not become an obstacle and the hooked state does not become difficult to come off, and the lock member can be smoothly pulled out.

According to the present invention, the circuit breaker fixed to the mounting panel can be fixed to the circuit breaker and can be prevented from coming off because the circuit breaker is prevented from moving forward due to the interference of the lock piece with the other end of the slit. At the unlocked position, the protrusion of the lock piece slightly protrudes from the bottom of the main body case. Therefore, if the circuit breaker is not completely mounted, the protrusion that is not in the slit is located on the mounting panel. Due to the action, the appearance becomes slightly floating, and it is possible to easily determine whether the circuit breaker is improperly installed.
Since the lock member is always urged downward, the lock operation is automatically performed at the lock position where the lock piece enters the slit. Therefore, it can be easily grasped that the lock has been made.

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 explanatory drawing of the lock member, (a) is a perspective view, (b) is a side view. It is an enlarged view of the part A in a state where the lock member is slid upward. It is an enlarged view of the part A in a state where the attachment is incomplete.

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 for turning on / off an electric circuit so as to be rotatable in the front-rear direction on the upper surface of a main body case 4 formed by assembling a pair of left and right case members 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. Note that FIG. 1 shows an on state (electric circuit connection state).
Further, an overcurrent cutoff mechanism (not shown) is provided in the main body case 4, and when an overcurrent is detected, a cutoff operation is performed to open the opening / closing mechanism.

Further, on the back 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 notching the main body case 4 in a U-shape penetrating in the left-right direction, and includes a main bar M (shown in FIG. 2) arranged in a distribution board or the like and a main bar M (shown in FIG. 2). A branch bar (not shown) branched from the main bar M 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 (note that the terminal L3 is not shown because it is covered with 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 the 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 a quick-connect terminal, and the inserted branch wiring is connected to the terminal fitting without a separate connection operation.

Then, on the bottom surface 4a 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 lowered. A lock member 30 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 lock member 30 is seen through. The front end of the bottom of the main body case 4 is open downward, the lower portion of the lock member 30 is configured to be projectable, and the upper portion is housed in the main body case 4. Further, an operation window 26 (shown in FIG. 1) is opened in the lower part of the front surface of the main body case 4, exposing the operation piece 31 for operating the lock member 30 and defining the vertical movement range of the lock member 30. There is.

4A and 4B show a single lock member 30, where FIG. 4A is a perspective view and FIG. 4B is a side view. The lock member 30 is made of synthetic resin, has an upright piece 30a arranged on the front surface side of the main body case 4, and is provided at the upper end thereof so that the operation piece 31 projects forward.
A coil spring mounting portion 30b housed in the main body case 4 is provided on the back of the standing piece 30a, and the coil spring 33 is arranged so as to expand and contract vertically. A lock piece 32 exposed downward is provided on the lower side of the coil spring mounting portion 30b.
The lock piece 32 has a lock piece main body 32a that abuts and interferes with the end portion of the front slit 21 to lock the circuit breaker 1, and a hemispherical protrusion 32b provided at the lower end of the lock piece main body 32a. ing.

Further, a locking portion (not shown) for locking the upper end of the coil spring 33 is provided in the main body case 4, and the lock member 30 assembled to the main body case 4 is always lowered by the coil spring 33. A prominent urging force is added.
On the left and right sides of the lock piece 32, guide members 30c that engage with the main body case 4 and guide the vertical slide of the lock member 30 are provided.

Then, even if the operation piece 31 is moved to the upper limit against the urging force of the coil spring 33 and the lock member 30 is stored in the main body case 4 as much as possible, only the protrusion 32b formed at the tip of the lock piece 32 continues. It is formed so as to continue to protrude downward (shown in FIG. 5).
T1 and T2 in FIG. 3 show this protrusion amount, and the protrusion amount T1 when the lock piece 32 is arranged at the lock position and protrudes is, for example, 2.0 mm, and the protrusion 32b when the lock piece 32 is moved to the unlock position. The protrusion amount T2 is, for example, 0.4 mm.

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

Next, the operation of attaching / detaching the circuit breaker 1 configured as described above to / from the mounting panel 20 will be described. In the mounting operation, 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, the lock member 30 is in a state of protruding downward due to the urging force of the coil spring 33, but the lock piece 32 is pressed against the upper surface of the mounting panel 20 and slides upward to be embedded in the main body case 4. .. By this action, only the protrusion 32b is finally exposed.
5 and 6 show this state, FIG. 5 is an enlarged view of part A in a state where the lock member 30 is slid upward, and FIG. 6 shows a circuit breaker 1 in which the exposed protrusion 32b comes into contact with the upper surface of the mounting panel 20. Indicates a floating state.

After that, 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 M arranged on the mounting panel 20 of the power supply side terminal 2 enters each of the terminals P1 to P3, and the power supply side terminal 2 is connected (shown in FIG. 2). Further, the protrusion 32b enters the front slit 21 (the lock piece 32 enters the front slit 21), and the hook pieces 8 and 9 are hooked to the ends of the slits 21 and 22, respectively.

When pushed into this position, the lock piece 32 is arranged in the front slit 21, and due to the urging force of the coil spring 33, the lock piece 32 enters the front slit 21 and interferes with the front end of the slit 21. Lock. As a result, the circuit breaker 1 is prohibited from moving forward, and the mounting is completed.

The operation for removing the circuit breaker 1 mounted on the mounting panel 20 from the mounting panel 20 is as follows. The operation piece 31 is operated to slide the lock member 30 upward as indicated by the arrow in FIG. 5, and the lock piece 32 is moved to the unlocked position. Then, the interference between the lock piece 32 and the front end of the front slit 21 is released (shown in FIG. 5). That is, the lock of the circuit breaker 1 to the mounting panel 20 is released, and the circuit breaker 1 can be pulled out to the front side.
By pulling it forward 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, by lifting the circuit breaker 1, the hook pieces 8 and 9 are pulled out from the slits 21 and 22 and removed.

In this way, the circuit breaker 1 fixed to the mounting panel 20 is prevented from moving forward due to the interference of the lock piece 32 with the front end of the front slit 21, so that the circuit breaker 1 can be fixed and can be disengaged. Can be prevented. At the unlocked position, the protrusion 32b of the lock piece 32 slightly protrudes from the bottom of the main body case 4, so if the circuit breaker 1 is not completely attached, the protrusion 32b that is not in the front slit 21 Due to the action of being located on the mounting panel 20, the appearance is slightly floated, and it is possible to easily determine the mounting failure of the circuit breaker 1.
Since the lock member 30 is always urged downward, the lock member 32 automatically locks at the lock position where the lock piece 32 enters the front slit 21. Therefore, it can be easily grasped that the lock has been made.
Further, the amount of protrusion of the lock member 30 at the unlocked position is small, and when the circuit breaker 1 is removed, the protrusion 32b does not become an obstacle and the hooked state does not become difficult to come off, and the circuit breaker 1 can be smoothly pulled out. In addition, since the protrusion 32b formed on the lock piece main body 32a is hemispherical, it is slippery and does not get caught in the mounting panel 20 or the like during the lock operation / unlock operation and is not difficult to operate.

The configuration of the circuit breaker 1 of the present invention is not limited to the embodiment of the above embodiment, and the entire structure of the circuit breaker 1 is of course fixed to the lock member 30 and the mounting panel 20. The related configurations and the like can be appropriately changed as necessary without departing from the spirit of the present invention.
For example, in the above embodiment, the protrusion amount (protrusion amount of the protrusion 32b) T2 at the unlocked position of the lock piece 32 is 0.4 mm, but this protrusion amount T2 is the shape and size of the circuit breaker, and further. It is changed according to the shape of the slit, and if it is between 0.3 and 1.0 mm, the circuit breaker 1 can be attached and detached satisfactorily, and the floating state can be determined.
Further, although two hook pieces 8 and 9 are provided on the bottom surface 4a of the main body case 4, one may be provided, and the lock member 30 is urged by the coil spring 33, but the lock member 30 is urged. It may be urged by a continuously formed elastic piece made of synthetic resin.

1 ... Circuit breaker, 2 ... Power supply side terminal, 3 ... Load side terminal, 4 ... Main body case, 4a ... Main body case bottom, 8 ... Front hooking piece (hooking piece), 9 ... Rear hooking piece (hooking piece), 20 ... Mounting panel, 21 ... Front slit (slit), 22 ... Rear slit (slit), 26 ... Operation window, 30 ... Lock member, 31 ... Operation One piece, 32 ... lock piece, 32a ... lock piece body, 32b ... protrusion, 33 ... coil spring (biasing 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 piece 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 piece 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 member is assembled to the main body case via an urging means so as to project downward, and includes an operation piece to be stored in the main body case and operated to move upward.
The lock piece has a lock piece main body that abuts and interferes with the other end of the slit and a protrusion formed at the lower end of the lock piece main body, and protrudes from the bottom surface of the main body case to make the lock piece main body into the slit. A circuit breaker characterized in that it can slide up and down between a lock position that interferes with the lock position and an unlock position that is embedded in the main body case and projects only the protrusion. The circuit breaker according to claim 1, wherein the protrusion formed at the lower end of the lock piece main body is formed in a hemispherical shape. The circuit breaker according to claim 1 or 2, wherein the protrusion amount of the protrusion from the bottom surface of the main body case at the unlocked position is 0.3 to 1 mm.

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