JP6920130B2 - Circuit breaker - Google Patents

Description

The present invention relates to a circuit breaker installed in, for example, a distribution board.

Conventionally, when installing a circuit breaker in a distribution board, it is common to use a mounting panel. As a general structure for fixing the 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. Assuming that the power supply side terminal side of the circuit breaker is the rear side and the load side terminal side is the front side, the circuit breaker is pushed to the rear side after the hook piece is projected to the lower side of the mounting panel through the slit. The hooking piece is hooked on the rear end of the slit. However, the circuit breaker is not fixed in this state. Therefore, for example, in the invention 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. In the locked 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 Patent No. 4153155

However, in the invention described in Patent Document 1, the lock lever must be operated one by one especially when the circuit breaker is fixed to the mounting panel, which causes problems such as troublesome work and forgetting to lock. ..

Therefore, the present invention has been made in view of the above problems, and an object of the present invention is to provide a circuit breaker that can be more easily fixed to a mounting panel.

In order to achieve the above object, in the present invention, a hook-shaped hook is projected downward from the bottom surface of the main body case, and the bottom of the main body case can be projected downward from the bottom surface of the main body case. A lock member provided with a lock portion is provided, the hook piece is inserted through a slit provided in the mounting panel, the hook piece is hooked at one end in the longitudinal direction of the slit, and the lock is locked. A circuit breaker fixed to the mounting panel by positioning a portion in the slit and bringing the other end of the slit into contact with the lock portion, wherein the lock portion is from the bottom surface of the main body case. The lock portion can be slid up and down between the lock position protruding downward and the unlock position embedded in the main body case, and the lock portion is urged downward to the lock member to lock the lock member. It is characterized in that an elastic means for holding the lock portion at the lock position is provided in a state where an upward load is not applied to the member.

According to the present invention, in the lock member, the lock portion can slide up and down between the lock position protruding downward from the bottom surface of the main body case and the unlock position embedded in the main body case. The lock member is provided with an elastic means for urging the lock portion downward and holding the lock portion in the locked position when no upward load is applied to the lock member. Therefore, simply insert the hook piece through the slit and push the circuit breaker so that the hook piece is hooked on one end of the slit, and the lock part automatically slides to the unlock position side and finally. The circuit breaker will be fixed to the mounting panel after returning to the locked position. That is, the operator can fix the circuit breaker to the mounting panel without operating the lock member one by one. Therefore, the circuit breaker can be fixed to the mounting panel more easily than before without forgetting to lock the circuit breaker.

It is a perspective explanatory view which showed the circuit breaker fixed to the mounting panel. It is explanatory drawing which showed the circuit breaker fixed to the mounting panel from the side. It is explanatory drawing which showed the lock member, (a) is a side view, (b) is a front view, (c) is a rear view. It is explanatory drawing which showed the state which the circuit breaker was locked by the lock member. It is explanatory drawing which showed the state which the lock by the lock member was released. It is explanatory drawing which showed the modification example of the lock member. It is explanatory drawing which showed the state which the circuit breaker was locked by the lock member which is a modification example. It is explanatory drawing which showed the state which the lock by the lock member which is a modification example was released.

Hereinafter, the circuit breaker according to the embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a perspective explanatory view showing a circuit breaker 1 fixed to the mounting panel 20, and FIG. 2 is an explanatory view showing the circuit breaker 1 in the same state from the side. 3A and 3B are explanatory views showing the lock member 30, where FIG. 3A is a side view, FIG. 3B is a front view, and FIG. 3C is a rear view. FIG. 4 is an explanatory view showing a state in which the circuit breaker 1 is locked by the lock member 30, and FIG. 5 is an explanatory view showing a state in which the lock member 30 is unlocked. The load side terminal 3 side will be described as the front side of the circuit breaker 1.

The circuit breaker 1 has a main body case 4 formed by assembling a pair of left and right cases made of synthetic resin, and a handle 7 is provided on the upper surface of the main body case 4 so as to be rotatable in the front-rear direction. .. Then, by rotating the handle 7, a shutoff mechanism (not shown) incorporated in the main body case 4 is activated, and an electric path that electrically connects the power supply side terminal 2 and the load side terminal 3 described later is connected / It is designed to be released. Further, 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 are projected downward. An overcurrent detection mechanism (not shown) is also provided in the main body case 4, and the cutoff mechanism opens when an overcurrent is detected.

Further, on the rear surface of the circuit breaker 1, 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 a conductor bar (not shown) which is a power supply line arranged in a distribution board or the like. A branch bar (not shown) branched from the conductor bar can be inserted and connected.

On the other hand, the front surface of the circuit breaker 1 is formed on an inclined surface that inclines downward toward the front side, and three terminals L1 and L2, to which load wiring (not shown) can be inserted and connected, are formed on the inclined surface. A load-side terminal 3 is arranged in which L3 (not shown because the terminal L2 is covered by the cover member 10) is provided in a row in the inclined direction. Each of the terminals L1 to L3 has a terminal hole 5 into which the load wiring can be inserted in a direction orthogonal to the inclined surface, and is installed at a position inside the terminal hole 5 in the main body case 4 through the terminal hole 5. It has a terminal fitting (not shown) that can be contacted with the inserted load wiring, and functions as a so-called quick connection terminal.

Further, in each of the terminals L1 to L3, an insertion hole 6 into which a measurement terminal of an instrument for performing an insulation resistance measurement test can be inserted is provided adjacent to the lower side of the terminal hole 5. Each insertion hole 6 is provided so that the insertion direction of the measurement terminal is in the vertical direction, that is, in a direction different from the insertion direction of the load wiring. Further, a measuring metal fitting (not shown) that comes into contact with the terminal metal fitting inside the adjacent terminal hole 5 is arranged at a position inside the insertion hole 6 in the main body case 4. Further, on the front surface of the circuit breaker 1, a cover member 10 covering the unused terminals of the terminals L1 to L3 and the insertion hole 6 is slidably attached along the guide wall 11.

In addition, the front end of the bottom of the main body case 4 is provided with a storage recess 25 that opens downward and can store a part of the lock member 30, which will be described later. Further, an operation window 26 communicating with the storage recess 25 is provided at the bottom of the front surface of the main body case 4. A lock member 30 for preventing the circuit breaker 1 from falling off from the mounting panel 20 is assembled in the storage recess 25.

The lock member 30 is an operation piece having a strip-shaped rising portion 31a extending in the vertical direction, a knob portion 31b protruding from the upper end of the raising portion 31a to the front side, and a base portion 31c protruding from the lower end of the raising portion 31a to the rear side. A lock portion 32 that protrudes downward from the base portion 31c, and a leaf spring portion 33 that has elasticity and expands and contracts in the vertical direction are integrally provided. The lock member 30 is assembled in a state in which the leaf spring portion 33 is housed in the storage recess 25 and the operation piece 31 projects forward of the main body case 4 through the operation window 26.

Then, in the lock member 30, normally (a state in which an upward load is not applied to the lock member 30), the base portion 31c of the operation piece 31 comes into contact with the lower end of the operation window 26 due to the urging force of the leaf spring portion 33. In the state, the lock portion 32 is held at a lock position protruding downward from the bottom surface of the main body case 4. Further, an upward load is directly applied to the lock portion 32, or the operation piece 31 is operated upward against the urging force of the leaf spring portion 33, so that the base portion 31c of the operation piece 31 is the upper end of the operation window 26. When the lock portion 32 is moved until it comes into contact with the main body case 4, the lock portion 32 moves to the unlocked position embedded in the main body case 4.

On the other hand, the mounting panel 20 is conventionally known, and has 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. A plurality of the front slit 21 and the rear slit 22 are provided at predetermined intervals in the parallel arrangement direction of the circuit breaker 1. The front-rear length of the front slit 21 and 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 are the same.

Here, the work of attaching / detaching the circuit breaker 1 having the lock member 30 to / from the mounting panel 20 will be described.
First, when fixing the circuit breaker 1 to the mounting panel 20, 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, and the lock portion 32 at the lock position is inserted. , It is assumed that the mounting panel 20 is placed on the surface of the mounting panel 20 on the front side of the front slit 21. Then, from this state, the circuit breaker 1 is pushed to the rear side so that the front hooking piece 8 is hooked on the rear end of the front slit 21 and the rear hooking piece 9 is hooked on the rear end of the rear slit 22. good. Then, as the circuit breaker 1 moves to the rear side, a load is directly applied to the lock portion 32 upward, so that the lock portion 32 automatically moves to the unlock position side. Then, when the front hooking piece 8 reaches the rear end of the front slit 21 and the rear hooking piece 9 reaches the rear end of the rear slit 22, the lock portion 32 moves above the front slit 21. When it reaches, the load applied to the lock portion 32 is released. Therefore, due to the urging force of the leaf spring portion 33, the lock portion 32 that automatically protrudes into the front slit 21 and returns to the lock position comes into contact with the front end of the front slit 21 (FIG. 4), and the circuit breaker 1 is attached to the mounting panel. It will be fixed at 20. As described above, fixing the circuit breaker 1 does not require an operator to operate the lock member 30.

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, the interference between the lock portion 32 and the front end of the front slit 21 is released (FIG. 5), that is, the circuit breaker 1 is released from being fixed to the mounting panel 20, so that the operation piece 31 remains pulled up. , Pull out the circuit breaker 1 to the front side (pull out until the lock portion 32 is located on the front side of the front slit 21), the hooked state of the front hooking piece 8 and the front slit 21, and the rear hooking piece 9 and the rear. The hooked state with the slit 22 is released respectively. After that, the front hooking piece 8 may be pulled out from the front slit 21 and the rear hooking piece 9 may be pulled out from the rear slit 22 while pulling out the circuit breaker 1 further to the front side. When the hooked state of the hook pieces 8 and 9 and the slits 21 and 22 is released, the pulling operation of the operation piece 31 may also be released.

According to the circuit breaker 1 having the above configuration, in the lock member 30, the lock position in which the lock portion 32 projects downward from the bottom surface of the main body case 4 and the unlock position in which the lock portion 32 is embedded in the main body case 4 In addition to being able to slide up and down between the lock member 30, the lock portion 32 is urged downward to the lock member 30, and the lock portion 32 is locked in a state where no upward load is applied to the lock member 30. A leaf spring portion 33 to be held by is provided. Therefore, the lock portion 32 is automatically inserted only by inserting the front hook piece 8 into the front slit 21 and pushing the circuit breaker 1 so that the front hook piece 8 is hooked on the rear end of the front slit 21. The circuit breaker 1 is fixed to the mounting panel 20 by sliding to the unlocked position side and finally returning to the locked position and coming into contact with the front end of the front slit 21. That is, for the operator, it is not necessary to operate the lock member 30 one by one when fixing the circuit breaker 1 to the mounting panel 20. Therefore, the circuit breaker 1 can be fixed to the mounting panel 20 more easily than before without forgetting to lock the circuit breaker 1.

The configuration of the circuit breaker of the present invention is not limited to the embodiment of the above embodiment, and the overall structure of the circuit breaker, as well as the configuration of fixing to the lock member and the mounting panel, etc. Can be appropriately changed as necessary without departing from the spirit of the present invention.

For example, in the above embodiment, two hook pieces are provided on the bottom surface of the main body case, but only one may be provided, and the direction of the hook pieces is also a hook shape that bends forward. Also, the position of the lock member can be appropriately changed according to the difference in the shape of the hook piece, the length of the slit, and the like.

Further, in the above embodiment, the elastic means is the leaf spring portion, but a coil spring may be attached as the elastic means. Hereinafter, the lock member 130 using the coil spring 133 will be described with reference to FIGS. 6 to 8. FIG. 6 is an explanatory view showing a lock member 130 as a modified example. FIG. 7 is an explanatory view showing a state in which the circuit breaker is locked by the lock member 130, and FIG. 8 is an explanatory view showing a state in which the lock is released by the lock member 130.

Like the lock member 30 of the above-described embodiment, the lock member 130 includes a band-shaped rising portion 131a extending in the vertical direction, a knob portion 131b protruding from the upper end of the raising portion 131a to the front side, and a rising portion 131a from the lower end to the rear side. An operation piece 131 having a base portion 131c protruding downward and a lock portion 132 protruding downward from the base portion 131c are integrally provided. However, on the upper surface of the lock portion 132, a mounting shaft 132a protruding upward is provided instead of the leaf spring portion 33, and the coil spring 133 is mounted so as to insert the mounting shaft 132a into itself. .. Further, both left and right sides of the mounting shaft 132a in the lock portion 132 come into contact with the surface of the main body case 104 (specifically, the inner surface of the storage recess 125) when the lock member 130 is attached to the main body case 104, and the lock member 30 Guide blocks 132b and 132b are provided to smoothly guide the movement of the vehicle in the vertical direction. In such a lock member 130, the guide blocks 132b, 132b and the coil spring 133 are housed in the storage recess 125 provided at the front end of the bottom of the main body case 104, and the operation piece 131 passes through the operation window 126 to the main body case 104. It is assembled so that it protrudes forward.

As with the lock member 30, the lock member 130 is also normally held at a lock position in which the lock portion 132 projects downward from the bottom surface of the main body case 104 by the urging force of the coil spring 133. Further, when the operation piece 131 is operated upward or a load is directly applied to the lock portion 132, the lock portion 132 moves to the unlocked position embedded in the main body case 104.

Therefore, the work of attaching and detaching the circuit breaker having the lock member 130 to the mounting panel 20 is the same, and when mounting the circuit breaker to the mounting panel 20, the front and rear hook pieces of the circuit breaker correspond to each other. It is inserted into the slit, and the lock portion 132 at the locked position is placed on the surface of the mounting panel 20 on the front side of the front slit 21. Then, if the circuit breaker is operated to be pushed backward from this state, the lock portion 132 automatically moves up and down in accordance with the operation, and the lock portion 132 finally returned to the lock position is the front slit 21. The circuit breaker is fixed to the mounting panel 20 as it protrudes inward (FIG. 7). On the other hand, when removing the circuit breaker from the mounting panel 20, the lock portion 132 was pulled up above the mounting panel 20 by operating the operation piece 131 upward to move the lock portion 132 to the unlocked position. (FIG. 8) After that, the circuit breaker may be moved so as to be pulled out to the front side.

Even if the lock member 130 as described above is provided, it is not necessary for the operator to operate the lock member 130 one by one when fixing the circuit breaker to the mounting panel 20. Therefore, the same effect as that of the circuit breaker 1 of the above-described embodiment can be obtained, in which the circuit breaker can be fixed to the mounting panel 20 more easily than before without forgetting to lock.

1 ... Circuit breaker, 2 ... Power supply side terminal, 3 ... Load side terminal, 4, 104 ... Main body case, 8 ... Front hook stop piece, 9 ... Rear hook stop piece, 20 ... Mounting panel , 21 ... front slit, 22 ... rear slit, 25, 125 ... storage recess, 26, 126 ... operation window, 30, 130 ... lock member, 31, 131 ... operation piece, 32, 132 ... Lock part, 33 ... Leaf spring part (elastic means), 133 ... Coil spring (elastic means).

Claims (1)

A hook-shaped hook piece is projected downward from the bottom surface of the main body case, and a lock member having a lock portion that can project downward from the bottom surface of the main body case is provided at the bottom of the main body case. Hook,
The hook piece is inserted through a slit provided in the mounting panel, the hook piece is hooked at one end in the longitudinal direction of the slit, and the lock portion is positioned in the slit, and the other end of the slit. A circuit breaker fixed to the mounting panel by bringing the lock portion into contact with the lock portion.
The lock portion can slide up and down between the lock position protruding downward from the bottom surface of the main body case and the unlock position embedded in the main body case.
The lock member is provided with an elastic means for urging the lock portion downward and holding the lock portion at the lock position when no upward load is applied to the lock member. Circuit breaker.

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