JP2000215780A - Terminal device for circuit breaker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To miniaturize the width direction of a breaker by constituting it in such a state as shifting a terminal device in the direction perpendicular to the both of the insertion direction of an electric wire or a bar and the width direction of the breaker. SOLUTION: A power side and a load side have electric wire insertion holes 1c, 1d, etc., in which an insertion part 2a and a conductor part 3a of an electric wire 3 provided in bars 2 respectively are inserted. The electric wire insertion holes 1c, 1d, etc., are arranged so as to level differences vertically. The electric wire insertion holes 1c, 1d, etc., are arranged so as to have level differences vertically so that, even if the width-directional length is small (including 0), the electric wire 3 and the bars 2 inserted in each pole can secure the sufficient insulation distance by the vertical length to be safe. When fingers seize the electric wire 3 in inserting/drawing out the electric wire 3, a sufficient space can be held between adjoining electric wires 3, thereby preventing the workability from being spoiled. The reduction in the width direction can be sufficiently attained so as to miniaturize the circuit breaker.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a terminal device for a circuit breaker for connecting a conductor such as an electric wire.

[0002]

2. Description of the Related Art FIG. 15 shows a conventional terminal device of a circuit breaker. In this terminal device, a terminal unit 1 provided on a body 1 is provided.
The terminal plate 2 is supported by f. The terminal plate 2 is tapped so that the terminal screws 3 can be attached thereto. When the terminal screw 3 is loosened, the electric wire 4 is inserted and the terminal screw 3 is tightened with a screwdriver to complete the electrical connection between the terminal plate 2 and the conductor 4a of the electric wire 4. The terminal positions of each phase are provided adjacent to each other in the width direction of the circuit breaker.

[0003]

In recent years, there has been an increasing demand for downsizing of a distribution board, and there has been a demand for downsizing of a circuit breaker which is a main component thereof. In particular, for reducing the size of the circuit breaker, it is most effective to reduce the width of the circuit breaker.

However, in the circuit breaker terminal device having the above-described configuration, the size of the terminal screw used according to the rated current of the circuit breaker is determined by the Electrical Appliance and Material Control Law. There was a limitation on the size reduction of the width of the.

As a solution to the above problem, FIG.
A terminal device for a circuit breaker shown in FIG. 17 has been proposed. In other words, the terminal connection portions of both poles are arranged in a vertically different position, and the partition wall 1 e is swelled above the lower terminal screw 3. This makes it possible to further reduce the size of the circuit breaker in the width direction as compared with the example shown in FIG.

However, even in this case, as shown in FIG.
Must be passed from above, the partition wall 1e can only partially protrude above the terminal screw 3 in the lower stage, and there is a limitation in downsizing the circuit breaker in the width direction.

As a device using a screwless terminal, a circuit breaker terminal device shown in FIG. 18 has been proposed. That is, in this terminal device, the electric wire insertion holes 1a, 1
When the conductor portion 4a, which is exposed by peeling off the coating of the wire 4 with the insulating coating from b, is inserted, the contact pressure of the locking spring (not shown) disposed opposite to the terminal plate (not shown) The conductor presses the conductor portion of the wire against the terminal plate by the piece, and the conductor portion and the terminal plate are electrically connected.

Therefore, in this case, the space in the width direction is substantially determined by the width of the locking spring, and the width can be reduced by the plate thickness and shape of the locking spring as compared with the terminal screw whose size is determined. It is. Further, since operation by a driver or the like is not required, space for inserting a driver is not required, and the device can be downsized.

However, in the present example where the wire insertion holes 1a and 1b are adjacent to each other, it is necessary to form a partition wall 1e by means of a vessel or the like in order to ensure insulation between adjacent components.
This limits the downsizing in the width direction.

Further, when the width direction is further reduced,
Adjacent wires are close to each other, and the insulation distance is insufficient. In addition, there is a problem that the wires are difficult to grasp because of the presence of the adjacent wires, and the workability of the wires deteriorates.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide an inexpensive circuit breaker which can sufficiently reduce the width of the circuit breaker in the width direction. To provide a terminal device.

[0012]

According to a first aspect of the present invention, there is provided a circuit breaker having a plurality of poles, wherein terminal portions provided at both ends (the power supply side and the load side) of the circuit breaker have a screwless terminal structure. The terminal device is configured to be shifted in a direction perpendicular to both the direction in which the electric wire or bar is inserted and the width direction of the circuit breaker.

According to a second aspect of the present invention, one side of the terminal portion is a bar.
, And the other terminal portion is constituted by a quick connection terminal corresponding to the electric wire.

According to a third aspect of the present invention, there are provided a first circuit constituting two sets of contacts and a mechanism for simultaneously opening and closing the contacts, and a second circuit constituting two sets of different contacts and a mechanism for simultaneously opening and closing the same. In the circuit breaker which has the circuit of the above and is built in the same housing, the terminal part provided on one side of each circuit has a screwless terminal structure, the direction in which the electric wire is inserted and the width direction of the circuit breaker. The terminal devices are offset from each other in a direction perpendicular to both of them, and the terminal portion on the other side is composed of a pair of screw terminal devices, each screw terminal device being a pair of contacts of the same circuit and another. It is characterized by being electrically connected to a set of contacts of one circuit.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention is shown in FIGS. 1 to 8, a second embodiment is shown in FIG. 9, and a third embodiment is shown in FIGS. The fourth embodiment will be described in detail with reference to FIGS.

[First Embodiment] FIG. 1 is a perspective view of a circuit breaker and the like according to the present invention, and FIG. 2 is a front view and a side view of the circuit breaker according to the present invention. 3 is a front view of the circuit breaker according to the present invention, FIG. 4 is a rear view of the circuit breaker according to the present invention, and FIG. 5 is a front view of a terminal device of the circuit breaker according to the present invention. It is. Further, FIG. 6 is a front view showing a state where an electric wire is inserted into the terminal device of the circuit breaker according to the present invention, and FIG. 7 is a front view showing a state where the electric wire is removed from the terminal device of the circuit breaker according to the present invention. FIG. 8 is an exploded perspective view of the terminal device of the circuit breaker according to the present invention.

This embodiment is a two-pole circuit breaker. 1
Is a body, which is composed of two sets of contact parts, one mechanism part for opening and closing the contact parts, and a bimetal or the like for electrically connecting between the power terminal plate and the load terminal plate of each pole. It supports the electrical circuit part.

The power supply side and the load side have insertion portions 2a provided in the bar-2 and insertion holes 1a, 1b and 1c, 1d into which the conductor 3a of the electric wire 3 is inserted.

Here, 1a and 1b and 1c and 1d are arranged with a step A in the vertical direction as shown in the figure.
That is, 1a is above 1b and 1c is above 1d.

Next, the configuration and operation of the terminal device of the circuit breaker will be described with reference to FIGS. 5 to 7 taking the load side (wire insertion side) as an example.

Reference numeral 5 denotes a locking spring, which has a contact pressure piece 5a and a locking piece 5b. Reference numeral 4 denotes a terminal plate, which is disposed at a position facing the lock spring 5. 1c is an electric wire insertion hole. Reference numeral 6 denotes a display member, which is rotatably supported by the housing 1 at a pivot 6a. Reference numeral 7 denotes a linear spring, which is locked in a groove provided near the pivot 6a of the display member 6 and a projection 1e provided in the body 1, and displays in a counterclockwise direction about the pivot 6a. The member 6 is biased.
Reference numeral 1f denotes a display hole, and when the display member 6 is rotated slightly clockwise from the state shown in FIG. 5, the display portion 6b provided on the display member 6 can be visually recognized from the display hole 1f.

The operation of the terminal device of the circuit breaker will be described. As shown in FIG. 6, when the electric wire 3 with the conductor portion 3a at the tip exposed is inserted through the electric wire insertion hole 1d, the locking spring 5
The pressure contact piece 5a presses the conductor 3a of the electric wire 3 against the terminal plate 4, and the terminal plate 4 and the conductor 3a of the electric wire 3 are electrically connected. At this time, the lock piece 5b locks the conductor portion 3a of the electric wire 3 to prevent the electric wire 3 from coming off due to vibration, impact, or the like without being fixed by screws or the like.

When the electric wire 3 is inserted further deeply, the display member 6 is pressed by the tip of the conductor 3a and rotates clockwise about the pivot 6a. Then, the body 1
The display portion 6b provided in the display member 6 can be visually recognized from the display hole 1f provided in the terminal member 3, thereby confirming that the terminal plate 4 and the conductor portion 3a of the electric wire 3 have been electrically connected sufficiently. Notify workers.

On the other hand, if the insertion of the electric wire 3 is not sufficient and the electric wire 3 is not inserted until it reaches the pressure contact piece 5a of the locking spring 5,
As described above, the display member 6 is not pressed by the conductor portion 3a, and the display member 6 does not rotate, and the display hole 1 provided in the body 1 is not rotated.
Since the display section 6b of the display member 6 is not visible from f,
It is possible to inform an operator that the terminal plate 4 and the conductor portion 3a of the electric wire 3 are not electrically connected sufficiently, and the operator can further insert the electric wire 3 deeply to reliably obtain a stable connection state. be able to.

Next, an operation of pulling out the inserted electric wire 3 from the terminal device will be described with reference to FIG. As described above, the locking piece 5b of the locking spring 5 locks the conductor 3a of the inserted wire 3 so that it cannot be easily removed only by pulling it out.

Therefore, in this terminal device, the unlocking portion 6 for releasing the locking piece 5b of the locking spring 5 from locking the conductor portion 3a.
c is provided on the display member 6. When the display member 6 is rotated clockwise as shown in FIG. 7, the release portion 6c pushes down the lock piece 5b of the lock spring 5, and the lock piece 5b stops locking the conductor portion 3a. If the electric wire 3 is pulled out in this state, it can be easily removed from the terminal device.

After the electric wire 3 is pulled out, the display member 6
Is urged in the counterclockwise direction by the linear spring 7 to return to the position shown in FIG.

In the above, the load side terminal has been described as an example. However, the power supply side terminal is similarly configured. In this case, the insertion part 2a of the bar-2 is used instead of the conductor part 3a of the electric wire 3.
In addition, while the wire 3 is inserted and pulled out, the insertion portion 2a of the bar-2 is fixed, and a similar effect can be obtained by operating the circuit breaker. This insertion part 2
a has substantially the same cross-sectional area as the conductor portion 3a of the electric wire 3,
It is machined so as to have a substantially circular cross section with a rounded corner.

According to this terminal device, the electric wires and the bars to be inserted into the respective poles are arranged such that the electric wire insertion holes 1a and 1b and 1c and 1d are provided with a step in the vertical direction as shown in FIG. Therefore, when the length B in the width direction is small (including 0)
However, a sufficient insulation distance can be ensured by the length A in the vertical direction, which is safe. Also, insertion of the above-mentioned electric wire,
When grasping the electric wire with a finger at the time of pulling out, there is sufficient space between adjacent electric wires, and the workability is not impaired.

As described above, the size in the width direction can be sufficiently reduced, and the circuit breaker can be reduced in size.

[Second Embodiment] FIG. 9 shows a second embodiment of the present invention. In the above-described first embodiment, the electric wire insertion holes 1c and 1d are provided on the side surfaces of the circuit breaker.
As shown in the drawing, the same effect can be obtained by disposing it on the upper surface of the circuit breaker. Similarly, bar is inserted 1
a and 1b may also be provided, for example, on the bottom side of the circuit breaker.

The basic structure of the terminal device of the circuit breaker of this embodiment is very similar to that of the first embodiment, and the same portions are denoted by the same reference numerals and detailed description thereof will be omitted. I do.

As described above, similarly to the first embodiment, the size in the width direction can be sufficiently reduced, and the circuit breaker can be reduced in size.

[Third Embodiment] A third embodiment of the present invention will be described with reference to FIGS. Note that the basic configuration of the terminal device of the circuit breaker of the present embodiment is very similar to that of the first embodiment, and the same portions are denoted by the same reference numerals and detailed description thereof will be omitted.

In the terminal device of this embodiment, the load side terminals are the same as those of the first embodiment described above, but the power supply side terminals are constituted by plug-in terminals 8 and the plug-in terminals of each pole are vertically It is arranged parallel to the direction. In addition,
Is made of a copper plate having a rectangular cross section with an R-shaped end. The plug-in terminal 8 is supported by the body 1, and is electrically connected to a part 8a of the plug-in terminal 8 by welding a braided wire 9 which is a conductor of the circuit breaker. The plug-in terminal 8 has a substantially U-shape, and its opening 8 b is narrowed to form a gap C.

Here, the gap C of the plug-in terminal 8 is smaller than the plate thickness t of the bar-2, and when the bar-2 is inserted from the opening 8b of the plug-in terminal 8, the gap C becomes smaller. It will be pushed out. As a result, the opening 8b is pressed against the bar-2 and is electrically connected sufficiently.

As described above, the power supply side terminal is constituted by the plug-in terminal, and the plug-in terminals of the respective poles are vertically arranged in parallel, so that miniaturization in the width direction is not impaired. Further, since there is no need to provide a projection on the insertion portion 2a of the bar-2 shown in the first embodiment described above, a sufficient sectional area can be obtained and the bar-2 can be made inexpensive. The electric board can be configured at low cost.

Fourth Embodiment A fourth embodiment of the present invention will be described with reference to FIGS.
Note that the basic configuration of the terminal device of the circuit breaker of the present embodiment is very similar to that of the first embodiment, and the same portions are denoted by the same reference numerals and detailed description thereof will be omitted.

The circuit breaker of the present embodiment relates to a circuit breaker having two two-pole circuit breakers inside. That is, the circuits 10 and 11 provided inside are:
It has a contact portion of two poles, one mechanical portion for opening and closing the contact portion, and an electric circuit portion composed of a bimetal or the like for electrically connecting between the power terminal plate and the load terminal plate of each pole. .

In addition, two load-side terminals are provided for each pole in the same manner as in the above-described embodiment, and 10a, 10b, 11a, and 11b are provided as wire insertion holes.
Is provided. The terminals of each circuit are vertically stepped, and the wire insertion holes are 10a, 1
1a is located on the upper side, and 10b and 11b are located on the lower side.

Here, the power supply side terminal has only one screw terminal 12, 13 at a position corresponding to each circuit. FIG. 14 shows the electrical connection between the two power supply terminals 12 and 13 and the four load terminals 10a, 10b, 11a and 11b. As shown in the figure, the power supply terminal 12 is connected to the load terminals 10a, 11a via contact mechanisms 14a, 15a. Similarly, the power supply terminal 13 is connected to the load terminal 10 via the contact mechanisms 14b and 15b.
b, 11b. That is, the load terminals 10a, 10b and 11a, 11b of each branch circuit are connected to different power supply terminals 12, 13.

Further, as shown in FIG.
In the above, the contact mechanism 14a, 1
4b is opened and closed, and in the branch circuit 11, the handle 17
Thereby, the contact mechanisms 15a and 15b are opened and closed.

As described above, by sharing the power supply side terminal with the two branch circuits, it is possible to configure the terminal with half the space in the width direction of the related art. Further, since the power supply side terminal is a screw terminal, a dedicated bar is not required, so that it can be used besides a specific distribution board or a single distribution board.

Further, since the power supply side terminal of the terminal device of the conventional circuit breaker has the same screw structure, the height and pitch of the screw terminals are made equal to those of the conventional product, so that the conventional distribution board can be used. Can be attached. That is, it is possible to easily increase the number of circuits or change a single-pole circuit breaker to a two-pole circuit breaker in a conventional distribution board.

[0045]

According to the first aspect of the present invention, since the screwless terminals are provided up and down steps, even if the width direction is reduced, the distance between the adjacent wires can be easily secured, and the safety can be secured. In addition, there is an effect that a small and inexpensive circuit breaker excellent in workability can be provided.

In the invention according to claim 2, claim 1
In addition to the effects of the invention described above, the power supply side terminals are arranged vertically in parallel as plug-in terminals, so that the size can be further reduced, and the structure of the bar can be further simplified, and the size and cost are reduced. This provides an effect that a simple circuit breaker and a distribution board can be provided.

According to the terminal device of the circuit breaker according to the third aspect, since the power supply side terminal is used as a screw terminal and shared by the two-circuit two-pole circuit breaker, the width can be reduced to half of the conventional width. Further, there is an effect that the number of circuits can be easily increased in a conventional distribution board, or a single-pole circuit breaker can be changed to a two-pole circuit breaker.

[Brief description of the drawings]

FIG. 1 is a perspective view of a circuit breaker and the like according to a first embodiment of the present invention.

FIG. 2 is a front view and a side view of the circuit breaker.

FIG. 3 is a front view of the circuit breaker.

FIG. 4 is a view seen from the back surface of the circuit breaker.

FIG. 5 is a front view of a terminal device of the circuit breaker.

FIG. 6 is a front view showing a state where an electric wire is inserted into a terminal device of the circuit breaker.

FIG. 7 is a front view of a state where an electric wire is extracted from a terminal device of the circuit breaker.

FIG. 8 is an exploded perspective view of a terminal device of the circuit breaker.

FIG. 9 is a perspective view of a circuit breaker according to a second embodiment of the present invention.

FIG. 10 is a perspective view of a circuit breaker and the like according to a third embodiment of the present invention.

FIG. 11 is a front view of a circuit breaker according to a third embodiment of the present invention.

FIG. 12 is an exploded perspective view of a circuit breaker according to a fourth embodiment of the present invention.

FIG. 13 is a front view and a side view of a circuit breaker according to a fourth embodiment of the present invention.

FIG. 14 is an internal circuit diagram of a circuit breaker according to a fourth embodiment of the present invention.

FIG. 15 is a perspective view of a circuit breaker and the like according to the first embodiment of the related art.

FIG. 16 is a perspective view of a circuit breaker according to a second conventional embodiment.

FIG. 17 is a front view and a side view of a circuit breaker according to a conventional third embodiment.

FIG. 18 is a perspective view of a circuit breaker according to a conventional fourth embodiment. [Description of Signs] 1 Body 2 Bar 1a Wire insertion hole 1b Wire insertion hole 1c Wire insertion hole 1d Wire insertion hole 3 Electric wire 4 Terminal plate 5 Lock spring 6 Display member 8 Plug-in terminal 12 Screw terminal 13 Screw terminal 10a Wire insertion hole 10b Wire insertion hole 11a Wire insertion hole 11b Wire insertion hole

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Toshihiro Oido 1048 Kazumasa Kadoma, Osaka Prefecture Inside Matsushita Electric Works Co., Ltd. (72) Inventor Tetsuyasu Kawamoto 1048 Kadoma, Kadoma, Osaka Pref. Matsushita Electric Works Co., Ltd. (72) Inventor Takashi Inamoto 1048 Kadoma, Kadoma, Kadoma, Osaka Pref. BA06 BB03 EA00 FA02 XX20 YY03

Claims (3)

[Claims] 1. A circuit breaker having a plurality of poles, wherein terminal portions provided at both ends on a power supply side and a load side of the circuit breaker have a screwless terminal structure, and a direction in which an electric wire or a bar is inserted and A terminal device for a circuit breaker, wherein the terminal device is shifted in a direction perpendicular to any of the width directions of the circuit breaker. 2. The terminal according to claim 1, wherein one side of the terminal is formed of a plug-in terminal corresponding to a bar, and the other side of the terminal is formed of a quick connection terminal corresponding to an electric wire. 2. The terminal device for a circuit breaker according to claim 1. 3. A first circuit constituting two sets of contacts and a mechanism for simultaneously opening and closing the two contacts in the same body, and a second circuit constituting two sets of contacts different from the above and a mechanism for simultaneously opening and closing the same. In the circuit breaker having the circuit described above, the terminal portion provided on one side of each circuit has a screwless terminal structure, and the direction perpendicular to both the direction in which the wire is inserted and the width direction of the circuit breaker. The terminal device is configured to be shifted, and the terminal portion on the other side is composed of a pair of screw terminal devices. Each screw terminal device has one set of contacts of the same circuit and one set of the other circuit. A terminal device for a circuit breaker, which is electrically connected to a contact.