JPS5936818Y2 - Multi-pole circuit breaker - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to providing an insulating barrier between each external circuit connection terminal in a multi-pole circuit breaker.

FIGS. 1, 2 and 4 show an embodiment and a detailed view of a conventional inter-terminal insulation barrier.

In FIG. 1, a terminal 2 for connecting an external electric circuit is connected to a terminal connection surface of a main body 1, and a crimp terminal 3 is connected to it.

An insulating barrier 4 between the terminals is interposed between the terminals, one end of which has a dovetail shape and is connected to the main body 1 by plugging.

FIG. 2 is an enlarged view of the connecting portion of the insulating barrier 4 between the main body 1 and the terminal.

The width of the opening of the groove provided in the main body is b, the width of the bottom is a, and a>b.

Also, the dimensions of the joint part of the insulation barrier 4 are also c > d, and the dimensions of the main body are c>b and a>c.

A bad relationship is established.

Now, in the above connection method, the insulation barrier 4 does not rotate left and right, so in the case of the crimp terminal 3 as shown in FIG. 4, the shape of the connection part of the insulation barrier 4 must be changed.

Further, the external electric circuit 5 has various shapes, and it is not economical to change the shape of the insulating barrier 4 each time.

Furthermore, in order to solve this drawback, the insulation barrier 4 is made of a soft insulator such as soft vinyl chloride, and the insulation barrier 4 is made to have continuity and is deformed to fit the shape of the crimp terminal 3 and the external electric circuit 5. However, insulating barriers made of soft insulators harden when used at low temperatures, and soften to the point that they cannot stand on their own when used at high temperatures.

In order to reduce this effect, there is a problem in that the thickness of the insulating barrier must be increased.

The present invention is designed for various external electrical circuits 5 and crimp terminals 3.
To provide a multi-pole circuit breaker capable of combining insulating barriers 4 which can be supported by inter-terminal insulating barriers 4 of two shapes.

FIG. 3 shows a front view of the connecting part of the insulating barrier 4 of the present invention.

The main body 1 is a synthetic resin casing that has a built-in circuit breaking mechanism that detects overcurrent and disconnects the circuit.The groove provided on the outer surface of the main body 1 is cylindrical, and the central axis extends from the outer surface. Due to its size, it is recessed in the back.

Since g is smaller than the radius e of the groove, there is an opening along the outer surface and its size is h.

Further, the insulating barrier 4 is made of thermoplastic resin, and the joint formed at one end thereof is also cylindrical, and its radius has a dimension f and a relationship of 2f>j with the thickness j of the insulating barrier 4.

The dimensional relationship with the joint part of the main body 1 is e>f, h>j, 2f
>h.

Under this condition, the insulating barrier 4 rotates about the central axis of the cylinder as shown in FIG.

Therefore, even in the case of FIG. 4, the insulating barrier 4 can be applied without changing its shape.

Due to the shape of the insulation barrier 4, the insulation barrier 4 rotates left and right around the cylindrical groove. can be improved.

Therefore, there is no need for the user to process the insulation barrier 4 as in the past.

Furthermore, since the insulation barrier is made of hard thermoplastic resin, it is less affected by ambient temperature and can be applied over a wide range of temperatures, and the thickness of the insulation barrier can also be made thinner.

As shown in FIG. 6, the center of rotation can be located deep inside the main body 1, and the opening can be shaped to have increased mechanical strength.

Since the insulating bar and the IJ wheel of this invention rotate from side to side, it is possible to create a circuit device with an insulating barrier that has a high ability to adapt to the user's various mounting directions of external electrical circuits, crimp terminal shapes, and operating temperatures. It will be done.

[Brief explanation of drawings]

Fig. 1 is a front view of a conventional insulation barrier, Fig. 2 is a perspective view of a joint part, Fig. 3 is a front view of a joint part showing an embodiment of the present invention, and Fig. 4 is a front view of a conventional insulation barrier. FIG. 5 is a front view of the insulating barrier of the present invention in a combined state, and FIG. 6 is a front view of another embodiment of the present invention. 1...Body, 2...Terminal for connecting external electrical circuit, 3...Crimp terminal, 4...Insulation barrier, 5...External electrical circuit .

Claims (1)

[Scope of utility model registration request] A main body has a built-in circuit breaking mechanism that detects overcurrent and cuts off the circuit, an external electrical circuit connection terminal provided on the end face of this main body, and a main body that is interposed between the external electrical circuit connection terminal. A multi-polar circuit breaker consisting of an insulating barrier made of thermoplastic resin joined at one end, the cylindrical shape having an opening along the outer surface of the main body between terminals for connecting external electric circuits provided on the end face of the main body. A groove is formed at one end of the insulating barrier, and a cylindrical joint portion is formed that rotatably fits into a cylindrical groove provided in the main body, and the curved end of the insulating barrier is connected to the main body. A multi-polar circuit breaker, characterized in that it projects from an opening along an outer surface and can be inserted into and removed from a groove in the main body.