JPS586119Y2 - Auxiliary contact unit for magnetic contactor - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to an auxiliary contact unit for an electromagnetic contactor.

Magnetic contactors are often used to start and stop motors that are frequently opened and closed, but in addition to the main contact, auxiliary contacts are often added to magnetic contactors, and the number can be easily added. It is desirable that it can be easily replaced.

The auxiliary contact of a conventional electromagnetic contactor is, for example, as shown in FIG. The tentacles and the springs that operated them were individually incorporated.

3 is a terminal connected to an external circuit.

However, with this configuration, the entire electromagnetic contactor including the auxiliary contactor is complicated, and the molded case must be divided into many pieces, making it difficult to control the dimensional accuracy of the mold and the molded product, that is, the case. Furthermore, since the auxiliary contact is always provided regardless of whether it is needed or not, the auxiliary contact may become useless in some cases, and there is also the disadvantage that the number of auxiliary contacts cannot be added.

When replacing the auxiliary contact, there is an inconvenience in that the fixed contact, movable contact, and spring must be replaced individually.

Therefore, in this invention, the electromagnetic contactor body case is separate,
To provide an auxiliary contact unit that can be easily attached to a main body case even in a small assembly and is easy to replace.

In order to achieve this purpose, the auxiliary contact unit for an electromagnetic contactor according to the present invention includes a fixed contact and a movable contact provided corresponding to the fixed contact in an outer shell formed independently of the main case of the electromagnetic contactor. It is equipped with a movable contact support that holds a contact and a movable contact and moves in the vertical direction relative to the fixed contact.Moreover, the movable contact support supports the electromagnetic contactor along the mounting direction to the electromagnetic contactor body case. A columnar projection is provided for coupling with the movable contact support in the main body case, and a hole larger than the outline of the columnar projection is provided on the opposite side of the columnar projection, and a hole is provided on the outer shell in series with and from this hole. It is characterized by having a large window and a hole through which a screw for coupling with the electromagnetic contactor body case passes.

Embodiments of the present invention will be described in detail below with reference to the drawings.

The main body of the electromagnetic contactor to which the auxiliary contact unit according to the present invention is attached has almost the same structure as the conventional one, except that it does not have an auxiliary contact unit from the beginning, but in order to additionally attach the auxiliary contact unit, a second As shown in the figure, the main body case 10
A window 1a for connecting the movable part in the main body case 1 and a movable part in the auxiliary contact unit and a screw hole 1b for mounting the auxiliary contact unit are provided on both sides.

As shown in detail in FIG. 3, the auxiliary contact unit 4 includes a pair of fixed contacts 5, 6, . The main components are bridge-type movable contacts 7 and 8 provided one each on the upper and lower sides, a movable contact support 9, and an outer shell 10 that houses these and includes a base 10a and a cover 10b.

Each of the fixed contacts 5 and 6 is sandwiched between each raised portion (shown as hatched in FIG. 3) of the base 10a of the outer shell 10,
A fixed contact is attached to one end of each, and terminals 11 and 12 are provided at the other end.

Movable contacts are attached to both ends of the movable contacts 7 and 80 corresponding to each fixed contact.

The movable contact support 9 placed in the empty space of the base 10a of the outer shell 10 is made of an insulating material and has a prismatic shape as shown in FIG. A columnar protrusion 9a is provided for connection to the movable contact support in the auxiliary contact unit, and a columnar protrusion of the next stage movable contact support having the same dimensions as this protrusion 9a is provided on the opposite side of this protrusion 9a. A hole 9b for fitting is bored.

Further, the body is provided with a rectangular through hole 9c for attaching the movable contact 7.8.

Although not shown in FIG. 4, the movable contact 7.8 is inserted into the lower and upper sides of the through hole 9C so that the contact points at both ends of the movable contact 7.8 are exposed on both sides of the body.

A coil spring 13 is installed between both contacts 7 and 80 as shown in FIG.
is compressed and inserted to press the movable contacts 7 and 8 up and down and to reduce the impact caused by opening and closing.

If this movable contact support 9 is combined with the fixed contacts 5 and 6 as shown in FIG. 3, an auxiliary contact having a two-point normally open contact and a normally closed contact can be obtained.

There is an 'I' on the outer shell for penetrating the columnar projection of the next stage movable contact support.
B 10 C and a hole 10d for passing through a connecting screw are provided.

To attach the auxiliary contact unit 4 according to the present invention to the electromagnetic contactor body case 1, as shown in FIG. and connect it to the movable contact support in the main body case 1 (the movable contact support in the main body case 1 is also provided with a hole similar to the hole 9b in FIG. 4).

), a screw is passed through the hole 10d of the auxiliary contactor unit 4 and screwed into the screw hole 1b of the main body case 1.

If the second auxiliary contactor unit 4' is also installed at the same time, insert the columnar projection 9a' of the auxiliary contactor unit 4' into the hole 9b of the movable contact support 9 through the window 10c of the auxiliary contactor unit 4, and When there is one set of contactor units, screws are tightened using longer screws 13.

In FIG. 2, the auxiliary contact unit 4.4' is mounted only on the left side of the main body case 1, but it can also be mounted only on the right side or on both sides.

The maximum number of auxiliary contact units that can be attached is determined by the movable force of the movable contact support in the electromagnetic contactor body case 1.

According to the present invention, the auxiliary contact is configured as a set of compact units, and the main case of the electromagnetic contactor has a connection window and a mounting screw hole, and the movable contact support inside the auxiliary contactor has a connection window and a mounting screw hole. By simply making a hole in advance, you can easily mount as many contacts as you like on the side or both sides of the hole, within the range allowed by the movable force of the movable contact support of the electromagnetic contactor body, and additions or replacements can be done for each unit. It is extremely easy to do.

[Brief explanation of drawings]

Figure 1 is a perspective view of a conventional auxiliary contactor-integrated magnetic contactor.
Fig. 2 is a perspective view showing how to attach the auxiliary contact unit according to the present invention to the electromagnetic contact body case, Fig. 3 is a front view of the auxiliary contact unit according to the present invention, and Fig. 4 is a movable contact according to the present invention. It is a perspective view of a child support. 1...Magnetic contactor main case, 4...
Auxiliary contact unit, 5, 6... fixed contact,
7, 8...Movable contact, 9...Movable contact support, 9a...Columnar projection, 9b...
・Hole, 10...outer shell, 10c...window,
10d...hole.

Claims (1)

[Scope of utility model registration request] A fixed contact, a movable contact provided corresponding to the fixed contact, and a movable contact are held in an outer shell formed independently of the electromagnetic contactor body case, and the movable contact is moved in the vertical direction relative to the fixed contact. A movable contact support is provided, and the movable contact support is provided with a columnar projection for coupling with the movable contact support in the electromagnetic contactor main body case along the mounting direction to the electromagnetic contactor main body case. A hole larger than the outline of the columnar projection is provided on the opposite side of the columnar projection, and a hole that is connected to this hole and penetrated by a screw for connecting the window with the electromagnetic contactor main body case is provided on the outer shell. An auxiliary contact unit for an electromagnetic contactor, characterized in that: