JP2596700Y2 - Circuit breaker - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit breaker having a wire connection terminal without using a screw.

[0002]

2. Description of the Related Art A terminal part of a conventional circuit breaker has a screw fastening structure in which an electric wire is inserted into an electric wire insertion slot and the electric wire is fastened with a screw. Then, there were problems such as complicated connection work of electric wires. In view of this problem, a terminal unit capable of connecting wires without using screws has been considered. Japanese Patent Application Laid-Open (JP-A) No. 54-3 / 1984 discloses a device provided with such a screwless terminal.
A circuit breaker as disclosed in Japanese Patent No. 8573 is known.

[0003] This circuit breaker is used to connect electric wires.
When a wire is inserted into the wire insertion slot, it will not be hooked. It has an excellent effect that the work of connecting the circuit breaker and the electric wire is easy.

[0004]

However, according to the above-mentioned conventional technology, when a circuit breaker having a screwless terminal is used for a distribution board or the like, the wiring includes a power supply side connection and a load side connection. Is performed with copper bars and electric wires, but the connection of the copper bar is not possible unless it is a screw-tight terminal, so if a circuit breaker is used in a distribution board, etc. Depending on the method, it is necessary to manufacture each type, one that adopts the screwless terminal structure only for the terminal on the power supply side and the other that adopts only the terminal on the load side, which puts a heavy burden on the manufacturing cost. .

[0005]

SUMMARY OF THE INVENTION In view of the above problems, according to the present invention, an electric wire can be connected to both the power supply side and the load side terminals without using screws by using a conventional circuit breaker having a screwed structure. The main object of the present invention is to provide a circuit breaker having a structure in which a connection terminal on a power supply side and a connection terminal on a load side have the same screw tightening structure, and a screw detachably connected to at least one of the connection terminals. A circuit breaker comprising a terminal block having no screws, wherein the terminal block having no screw comprises an electric wire insertion port, a locking press fitting provided inside the electric wire insertion port, and press-fitting between the locking press fitting and the electric wire. And a terminal fitting connected to the locking press fitting and connected to the connection terminal of the screw structure.

Further, when a plurality of circuit breakers are arranged side by side, an engaging projection is provided on one side wall of the screwless terminal block, and the other side wall is provided so that adjacent circuit breakers can be connected. An engagement recess is provided.

[0007]

[Action] A connection portion of a terminal fitting provided on a terminal block having no screw is inserted into a wire insertion opening of a conventional circuit breaker having a terminal portion of a screw fastening structure, and the terminal fitting is tightened with a screw to cut off the conventional circuit breaker. And the screwless terminal block. The wires are
The locking press fitting provided inside the wire insertion port is inserted while being pushed down from the wire insertion port provided in the screwless terminal block, and is pressed by the locking press fitting to be connected to the screwless terminal block.

When circuit breakers equipped with the screwless terminal block are used side by side in a distribution board or the like, the engaging protrusions and the engaging recesses provided on both side surfaces of the screwless terminal block are engaged with each other. By coupling, adjacent screwless terminal blocks can be connected, that is, a circuit breaker can be connected.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the circuit breaker according to the present invention will be described with reference to FIGS.

FIG. 1 shows a conventional circuit breaker body 3 having a screw-tight terminal block for connecting an electric wire to an electric wire connection terminal 1 with screws 2 and connecting a screwless terminal block 4 to a circuit breaker body 3. FIG. 2 is a top view showing a part of the circuit breaker according to the present invention, and FIG. 2 is a sectional view taken along the line AA in FIG. An electric wire insertion port 5 for inserting electric wires into the terminal block 4 without screws
A curved locking press fitting 6 is disposed inside the electric wire insertion opening 5, and a terminal fitting 7 is incorporated around the locking press fitting 6. The screwless terminal block 4 and the electric wire are connected to the lock press fitting 6. 6
And the terminal fitting 7 are electrically connected.

The case where the electric wire 8 is connected to the screwless terminal block 4 will be described with reference to FIG. The electric wire 8 is inserted from the electric wire insertion opening 5 while pushing down the locking press fitting 6. The wire 8 is pressed against the terminal fitting 7 at the curved portion 9 of the locking press fitting 6,
Eight electric wires are fixed. In addition, the end 10 of the lock press fitting 6
The wire 8 is formed in a wedge shape, and is opposed to a direction in which the electric wire 8 comes off, so that even if the electric wire 8 is pulled, it does not come off easily.

FIG. 4 is a sectional view taken along line BB in FIG. The wire removing button 11 is provided on the screwless terminal block 4. A protrusion 12 is provided inside the screw-less terminal block 4 of the wire-removing button 11 so as to fit into the space between the terminal fitting 7 and the locking press-fitting fitting 6. When the push button 11 is pressed, the projection 12 presses the locking press fitting 6, and the pressing force applied to the wire by the locking press fitting 6 can be released. At this time, the wire can be easily removed by pulling out the wire.

As shown in FIG. 2 and FIG.
On the side opposite to the side where the wire insertion port 5 is provided, a connection portion 13 of the terminal fitting 7 is provided for connection to the wire connection terminal 1 of the circuit breaker body 3. The connection portion 13 is inserted into the wire insertion port 14 of the circuit breaker main body 3 and tightened with the screw 2 to connect the screwless terminal block 4 to the circuit breaker main body 3.

Since the connection portion 13 can be connected to either terminal on the power supply side or the load side of the circuit breaker main body 3, the screwless terminal block 4 is connected to the circuit breaker 3 as necessary.

An engagement projection 15 and an engagement recess 16 are provided on the side surface of the screwless terminal block 4 so as to form a pair on the left and right. For example, as shown in FIG.
When using a circuit breaker, a plurality of circuit breakers may be arranged. In such a case, the adjacent circuit breaker main bodies 3 can be connected to each other by the engagement convex portions 15 and the engagement concave portions 16 of the screwless terminal block 4 being fitted.

[0016]

As described above, according to the circuit breaker of the present invention, the conventional circuit breaker is used as a main body, and at least one of the power supply side and the load side connection terminals is provided with an electric wire insertion port and A lock press fitting provided inside the wire insertion opening, an electric wire removal button for releasing the press contact between the lock press fitting and the wire, and a connection terminal connected to the lock press fitting and connected to the connection terminal of the screw tightening structure. Since the terminal block is provided with a screw-less terminal block having terminal fittings, an electric wire can be easily connected to both terminals on the power supply side and the load side.

Further, by providing an engagement projection on one side wall of the screwless terminal block and an engagement recess on the other side wall, when a plurality of circuit breakers are arranged side by side, an adjacent screwless terminal can be provided. The engaging protrusion and the engaging recess provided on the side wall of the base are engaged with each other, and the circuit breaker can be connected.

[Brief description of the drawings]

FIG. 1 is a partial top view of the circuit breaker according to the present invention.

FIG. 2 is a sectional view taken along line AA in FIG.

FIG. 3 is a sectional view of a terminal block without a screw;

FIG. 4 is a sectional view taken along line BB in FIG. 1;

FIG. 5 is an explanatory view of a state in which the circuit breakers according to the present invention are connected.

[Explanation of symbols]

1. Wire connection terminal, 2. Screw, 3. Circuit breaker body, 4. Screwless terminal block, 5. Wire insertion port, 6.
Lock press fitting, 7, Terminal fitting, 8, Wire, 9, Curved part, 10 End part, 11 Wire removal button, 1
2. Projection, 13 Connection fitting, 14 Wire insertion port,
15... Engagement projection, 16... Engagement recess, 17.

Claims (2)

(57) [Scope of request for utility model registration] 1. A circuit breaker comprising a main body in which connection terminals on a power supply side and a load side have the same screw tightening structure, and a screwless terminal block detachably connected to at least one of the connection terminals. Wherein the screwless terminal block includes an electric wire insertion port, a locking press fitting provided inside the electric wire insertion port, an electric wire removal button for releasing the press contact between the locking press fitting and the electric wire, and the lock. And a terminal fitting connected to the press-fitting fitting and connected to the connection terminal of the screw tightening structure. 2. An adjacent screwless terminal block when a plurality of circuit breakers are arranged side by side with an engaging projection on one side wall and an engaging recess on the other side wall of the screwless terminal block. 2. The circuit breaker according to claim 1, wherein the engaging projections and the engaging recesses provided on the side walls of the first and second engaging members are engaged with each other and connected.