JPH09231898A - Terminal cover with current feed display function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate assembling works and carry out assembly without requiring labor by forming openings in a printed circuit board, fitting one end of each coil spring in each opening, and contacting the other end with the input or output terminal of a circuit breaker. SOLUTION: Openings 4d are formed in a printed circuit board in such a way as corresponding to the number of coil springs 3, and patterns are provided around each opening 4d, and one end 3a of each spring 3 is fitted in the opening 4d while it is twisted in compliance with coil turns. The other end 3b of the spring 3 is contacted with the input terminal 7 or output terminal 8 of a circuit breaker 6. The opening 4d is circular having a diameter smaller than the inside diameter of the spring 3, and a pinched fit is made between two turns at the end part 3a of the spring 3 so as to hold it. The patterns on the board 4 are connected electrically with the end 3a of spring 3 in respective opening 4d. This eliminates necessity for mounting the board 4 and springs 3 separately on the cover body 2, so that the assembling works are facilitated, and assembly can be accomplished without significant labor.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is applied to at least one side of an input terminal and an output terminal of a circuit breaker to protect the input terminal or the output terminal and to indicate the energized state of the circuit breaker. Regarding terminal cover with display function.

[0002]

2. Description of the Related Art A conventional terminal cover with an energization display function will be described with reference to FIGS.

FIG. 5 is an exploded perspective view of a terminal cover having an energization display function. FIG. 6 (a) is a plan view of the terminal cover with the energization display function attached to the circuit breaker, and FIG. 6 (b) is a side view of a partial cross section of the terminal cover with the energization display function attached to the circuit breaker. Show.

In FIG. 5, a terminal cover 1 with an energization display function comprises a cover body 2, a plurality of coil springs 3, a printed circuit board 4, and a light emitting element 5.

The cover body 2 is shown in FIGS. 6 (a) and 6 (b).
As shown in, the circuit breaker 6 is attached to at least one side of the input terminal 7 and the output terminal 8, and is a box-shaped body having an open bottom surface and one side surface. The circuit breaker 6
Is a single-phase three-wire type circuit breaker, and has three input terminals 7 and three output terminals 8.

Each coil spring 3 is made of a conductive material and is arranged on the inner side surface of the cover body 1, as shown in FIG.
As shown in (b), one end 3a is fixed to the inner surface of the cover body 1, and the other end 3b is in contact with the input terminal 7 or the output terminal 8 of the circuit breaker 6. In the following description,
It is assumed that two coil springs 3 are used and the other end 3b of each coil spring 3 is in contact with any two terminals of the three output terminals 8.

The printed circuit board 4 has a pattern on one surface, and the pattern is electrically connected to one end 3a of each coil spring 3 via a lead wire 4a. The printed circuit board 4 has the notch 4b and the rib 2b of the cover body 2 engaged with each other, and the locking claw 2 provided on the inner side surface of the cover body 2.
It is locked by a and attached to the cover body 2.

The light emitting element 5 is composed of a light emitting diode or the like and is arranged on the pattern of the printed circuit board 4 to display the energization state of the circuit breaker 6. That is, if the output terminal 8 is in the energized state, the light emitting element 5 is turned on, and if not in the energized state, the light emitting element 5 is turned off. In addition, the light emitting element 5
Is visible from the outside through the display hole 2c which is a through hole provided on the upper surface of the cover body 2.

As shown in FIGS. 6 (a) and 6 (b), the terminal cover 1 with the energization display function constructed as described above is screwed into the screw hole 2d of the cover body 2 (not shown). Is screwed into the circuit breaker 6 by inserting it, and power is supplied from the output terminal 8 of the circuit breaker 6 via the plurality of coil springs 3 to indicate the energized state of the output terminal 8 by lighting the light emitting element 5. To do.

[0010]

However, the terminal cover 1 with the energization display function as shown in FIG. 5 and FIG. 6 described above.
In this case, the assembly work is performed by the tip 4c of the lead wire 4a connected to the printed circuit board 4 and the one end 3a of each coil spring 3.
It is necessary to separately attach the printed circuit board 4 and the coil spring 3 to the cover main body 2 after the connection, and therefore the assembling work is troublesome and time-consuming.

The present invention has been made in order to solve the above problems, and an object of the present invention is to provide a terminal with an energization display function which is easy to assemble and can be assembled without trouble. To provide a cover.

[0012]

In order to solve the above problems, the present invention provides a circuit breaker which is attached to at least one of the input terminal and the output terminal of the circuit breaker. At least one surface of the cover main body, a plurality of coil springs provided inside the cover main body and respectively abutting on a plurality of input terminals or a plurality of output terminals of the circuit breaker, and a pattern electrically connected to the plurality of coil springs In a terminal cover with a current-carrying display function, the printed circuit board being formed in the cover main body, and a light-emitting element arranged on the pattern of the printed circuit board to display a current-carrying state of the circuit breaker,
An opening for inserting one end of each of the coil springs is formed in the printed circuit board, and the pattern is arranged around the opening and the coil spring inserted into the opening is electrically connected to the opening. And the other end of each coil spring is brought into contact with the input terminal or output terminal of the circuit breaker.

According to a second aspect of the present invention, a coil spring mounting protrusion for inserting the coil spring is provided on the inner surface of the cover body.

According to a third aspect of the present invention, the opening of the printed circuit board is formed by cutting out from the end face of the printed circuit board.

According to a fourth aspect of the present invention, a through hole is formed in the cover body from the outer surface of the cover body to the tip of the coil spring mounting projection.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of a terminal cover with an energization display function according to the present invention will be described with reference to FIGS.
A second embodiment will be described based on FIGS. 3 and 4.

[First Embodiment] FIG. 1 is an exploded perspective view of a terminal cover having an energization display function. FIG. 2 (a) is a plan view in which the terminal cover with the energization display function is attached to the circuit breaker,
FIG. 2B shows a side view of a partial cross section in which the terminal cover with the energization display function is attached to the circuit breaker. 1 and 2
In the above, since the same parts as those of the terminal cover with the energization display function described in the above-mentioned conventional technique are designated by the same reference numerals, detailed description of the same parts will be omitted.

The terminal cover with the energization display function of the first embodiment shown in FIG. 1 is different from the terminal cover with the energization display function described in the above-mentioned prior art, and is characterized by the following configuration. .

That is, openings 4d are formed on the printed circuit board so as to correspond to the number of coil springs 3, a pattern is arranged around each opening 4d, and one end 3a of each coil spring 3 is formed in each opening. The other end 3b of each coil spring 3 is abutted against the input terminal 7 or the output terminal 8 of the circuit breaker 6 by being twisted along the turn and inserted into the 4d.

Each opening 4d is a circular opening having a diameter equal to or smaller than the inner diameter of the coil spring 3, and one end 3 of the coil spring 3 is formed.
It is inserted between two turns of a and holds each coil spring 3. The pattern of the printed circuit board 4 is electrically connected to the one end 3a of each coil spring 3 at each opening 4d.

A cutout 4d is formed on the end surface of the printed circuit board 4.
Is provided so that the screw hole portion 2d of the cover body 2 fits into the cutout portion 4d so that the screw hole portion 2d and the printed circuit board 4 do not come into contact with each other.

As shown in FIG. 6, the terminal cover 1 with the energization display function constructed as described above has a screw hole portion 2d.
It is screwed to the circuit breaker 6 by inserting a screw (not shown) into the circuit breaker, receives power from the input terminal 7 or the output terminal 8 of the circuit breaker 6 through the plurality of coil springs 3, and The energized state of the output terminal 8 is displayed by turning on the light emitting element 5.

Then, the assembling work is performed only by attaching the coil springs 3 to the openings 4d of the printed circuit board 4 and then attaching the printed circuit board 4 to the cover main body 2. And cover body 2 separately
It's easy because you don't have to attach it to.

[Second Embodiment] FIG. 3 is an exploded perspective view of a terminal cover having an energization display function. FIG. 4 (a) is a plan view in which the terminal cover with the energization display function is attached to the circuit breaker,
FIG.4 (b) shows the side view of the partial cross section which attached the terminal cover with an electricity display function to the circuit breaker. 3 and 4
In the above, since the same parts as those of the terminal cover with the energization display function described in the first embodiment are given the same reference numerals, detailed description of the same parts will be omitted.

The terminal cover with the energization display function of the second embodiment shown in FIG. 3 is different from the terminal cover with the energization display function described in the above-mentioned first embodiment. Is.

Firstly, each opening 4d is formed by cutting out from the end face of the printed circuit board 4.

Secondly, the coil spring mounting protrusion 2e extends from the inside of the upper surface of the cover body 2.

The coil spring mounting protrusion 2e is formed by the coil spring 3
The coil springs 3 are provided in a number corresponding to that of the coil springs 3 and are inserted into the coil springs 3. The coil spring mounting protrusion 2e has a through hole 2f penetrating from the outer surface of the cover body 2 to the tip of the coil spring mounting protrusion 2e. Further, since the coil spring mounting protrusion 2e is inserted into the coil spring 3 that abuts the input terminal 7 or the output terminal 8, the tip of the coil spring mounting protrusion 2e faces the input terminal 7 or the output terminal 8.

Since the terminal cover with the energization display function is constructed as described above, it can be easily attached by inserting the coil spring 3 into the printed board 4 from the end face of the printed board 4. When the printed circuit board 4 is attached to the cover body 2, the coil spring 3 has the coil spring mounting protrusion 2e inserted therein, and therefore the coil spring 3 does not fall off from the end surface of the printed circuit board 4. Absent.

Further, since the coil spring mounting protrusion 2e is inserted into the coil spring 3, the other end 3b is connected to the input terminal 7.
Alternatively, it is possible to reduce the lateral bending caused by the contact with the output terminal 8, and to suppress the deformation of the coil spring 3 to reduce the conduction failure of the coil spring 3.

Furthermore, the tip of the coil spring mounting protrusion 2e is
Since it faces the input terminal 7 or the output terminal 8, the through hole 2f
Has one end facing the input terminal 7 or the output terminal 8. Therefore, even if the terminal cover 1 with the energization display function is not removed from the circuit breaker 6, the insulation resistance measuring pin is inserted from the through hole 2f of the cover body 2. Input terminal 7 or output terminal 8
It is possible to measure the insulation resistance of the circuit breaker 6 by contacting it with, and the work of measuring the insulation resistance becomes easy. Also,
By increasing the diameter of the through hole 2f, a driver can be inserted, and the input terminal 7 or the output terminal 8 of the circuit breaker can be tightened or loosened without removing the terminal cover 1 with the energization display function. .

In the first and second embodiments, the circuit breaker 6 is described as a single-phase three-wire type circuit breaker having three input terminals 7 and three output terminals 8. However, the circuit breaker 6 is not limited to the single-phase, three-wire type circuit breaker, and may have any exposed terminals, and may be, for example, a single-phase, two-wire type circuit breaker.

[0033]

Since the terminal cover with the energization display function of the present invention is configured as described above, in the invention of claim 1, one end of each of the coil springs is inserted into the printed circuit board. To form an opening, and electrically connect the coil spring inserted in the opening with the pattern around the opening to the opening, and the other end of each coil spring is connected to the circuit breaker. Since it was brought into contact with the input terminal or the output terminal of, the coil spring is attached to the cover body after the coil spring is attached to the opening of the printed circuit board for the assembly work. Since it is not necessary to separately attach and to the cover main body, it is possible to provide a terminal cover with an energization display function, which can be easily assembled and can be assembled without labor.

According to the invention of claim 2, claim 1
In addition to the effects of the invention described, since the coil spring mounting protrusion is inserted into the coil spring, it is possible to reduce lateral bending caused by the other end of the coil spring coming into contact with the input terminal or the output terminal. It is possible to provide a terminal cover with an energization display function that can suppress deformation of the coil spring and reduce conduction failure of the coil spring.

In the invention according to claim 3, claim 2
In addition to the effect of the invention described, the opening of the printed circuit board,
Since it is formed by cutting out from the end surface of the printed board, there is an effect that it is possible to provide a terminal cover with an energization display function in which the coil spring can be easily attached to the printed board from the end surface of the printed board.

According to the invention of claim 4, claim 2
In addition to the effect of the invention of claim 3, since a through hole is formed in the cover body from the outer surface of the cover body to the tip of the coil spring mounting protrusion, one end of the through hole has an input terminal or an output terminal. Face-to-face, even without removing the terminal cover with a current indicator function from the circuit breaker, insert the insulation resistance measurement pin through the through hole of the cover body and make contact with the input terminal or output terminal, and then the insulation resistance of the circuit breaker. It is possible to provide a terminal cover with an energization display function that can perform the measurement of 1. and can easily perform the work of measuring the insulation resistance.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a terminal cover with an energization display function according to an embodiment of the present invention.

FIG. 2 (a) is a front view of a circuit breaker with a terminal cover with an energization display function attached, and FIG. 2 (b) is a side view of a partial cross-section with the terminal cover with an energization display function attached to a circuit breaker. is there.

FIG. 3 is an exploded perspective view of a terminal cover with an energization display function according to another embodiment of the present invention.

FIG. 4 (a) is a front view of a terminal cover with an energization display function attached to a circuit breaker, and FIG. 4 (b) is a partial cross-sectional side view of the terminal cover with an energization display function attached to a circuit breaker. is there.

FIG. 5 is an exploded perspective view of a conventional terminal cover with an energization display function.

FIG. 6 (a) is a front view showing a circuit breaker with a terminal cover with an energization display function attached, and FIG. 6 (b) is a side view of a partial cross section with the terminal cover with an energization display function attached to a circuit breaker. is there.

[Explanation of symbols]

 1 Terminal Cover with Energization Display Function 2 Cover Body 2e Coil Spring Mounting Protrusion 2f Through Hole 3 Coil Spring 4 Printed Circuit Board 4d Opening 5 Light Emitting Element 6 Circuit Breaker 7 Input Terminal 8 Output Terminal

Claims (4)

[Claims] 1. A cover main body attached to at least one side of an input terminal and an output terminal of a circuit breaker, and a cover main body provided inside the cover main body and respectively corresponding to a plurality of input terminals or a plurality of output terminals of the circuit breaker. A plurality of coil springs that are in contact with each other, a printed circuit board that is internally provided in the cover body and has a pattern that is electrically connected to the plurality of coil springs, and a circuit breaker that is disposed on the pattern of the printed circuit board. In the terminal cover with a current-carrying display function, which includes a light-emitting element for displaying the current-carrying state, an opening for inserting one end of each coil spring is formed in the printed board, and the opening is provided around the opening. A coil spring inserted into the opening and provided with the pattern is electrically connected to the opening, and the other end of each coil spring is brought into contact with the input terminal or the output terminal of the circuit breaker. Energizing the display function terminal cover characterized. 2. The terminal cover with an energization display function according to claim 1, wherein a coil spring mounting protrusion for inserting the coil spring is provided on an inner surface of the cover body. 3. The terminal cover with an energization display function according to claim 2, wherein the opening of the printed circuit board is cut out from the end surface of the printed circuit board. 4. The terminal cover with an energization display function according to claim 2, wherein the cover body is formed with a through hole penetrating from the outer surface of the cover body to the tip of the coil spring mounting protrusion. .