JPS6142273Y2 - - Google Patents

Description

[Detailed explanation of the idea] 【Technical field】

The present invention relates to contact switches such as relays and electromagnetic contactors.

[Background technology]

In such a contact switch, an L-shaped armature for driving the movable contact is used, and the vicinity of the inner corner of the bent part is supported by one end of the yoke so that it can swing freely. There is a type. In this armature, one piece is an attraction piece by coil excitation, and the other piece is a movable contact drive part, but one piece that is a movable contact drive part is arranged along the yoke. In addition, contact terminals such as movable contacts and fixed contacts driven by the armature are located close to the yoke. At this time, the yoke may have a magnetic influence on the armature, which may affect its operating characteristics. In addition, as a method of insulating between metal parts in a contact switch, interposing an insulating sheet or applying adhesive is generally used, but these methods increase the number of parts and assembly man-hours. This has become a factor in the increase in costs.

[Purpose of invention]

The present invention has been devised in view of these points, and its purpose is to provide a contact switch that can provide reliable electrical insulation at low cost and also has stable operating characteristics.

[Disclosure of invention]

The present device is characterized in that a case is constructed of a base on which parts such as a coil, yoke, armature, and contact terminal are assembled, and a cover attached to the base to cover the above parts, and two insulating walls are integrally provided between the contact terminal and the coil and for positioning the yoke therebetween, one insulating wall being positioned between the yoke and the coil, and the other insulating wall being positioned between the yoke and a movable contact drive part of the other piece of the armature which is L-shaped and has one piece that is attracted by excitation of the coil. The present device will be described in detail below based on the illustrated embodiment. In the figure, 1 is a case constructed of a base 2 and a cover 3, and the base 2 is connected to the cover 3.
The base 2 is disposed so as to close the lower end opening of the base 2.
On top are coil block 4, armature 5, and contact spring 7.
The coil block 4 has a coil 9 around the outer periphery of its hollow body.
The coil 9 is wound around a coil frame 10, an iron core 11 that is disposed through the coil frame 10, and an L-shaped yoke 12 having one piece attached to one end face of the coil frame 10 and the other piece disposed along the coil frame 10 with a gap between it and the coil 9.
The armature 5 is L-shaped, and the inner corner of the bent part is supported by a hinge part 14 at one end of a yoke 12 so as to be able to swing freely.
When the armature 5 is attracted to the iron core 11 facing one end of the contact spring 7, the other end of the armature 5 presses the contact spring 7, switching the fixed contact terminals 8, 8 which come into contact with the movable contact of the contact spring 7. Reference numeral 15 denotes a coil terminal. Two approximately parallel insulating walls 13, 13 are integrally formed and protrude from the upper surface of the base 2 on which the above-mentioned components are mounted. The coil 9 and coil frame 10 of the coil block 4 are disposed on one side of the longer insulating wall 13, and the yoke 12 is disposed between both insulating walls 1
Between the coil 9 and the yoke 12, the fixed contact terminals 8, 8 and the contact spring 7 are attached to the other insulating wall 13.
and the fixed contact terminal 8 are provided with insulating walls 13, 13
These insulating walls 13 serve to guide, position and hold the coil block 4, armature 5 and other components when they are attached to the base 2. In addition, they also serve to hold the driving side of the contact spring 7 in the armature 5.
That is, an insulating wall 13 is provided between the tip of the piece to be arranged along the yoke 12 and the yoke 12.
is positioned to ensure a predetermined distance between the two.
In other words, the contact driving side piece of the armature 5, which is located in a position where magnetic attraction between the armature and the yoke 12 is likely to occur, is separated from the yoke 12 to prevent the armature 5 from being affected by magnetism. As shown in Fig. 7, both insulating walls 13, 13 may be provided integrally and vertically from the cover 3. In any case, it is preferable that the tip surface of the insulating wall 13 be located close to the cover 3 or the base 2.

[Effect of the idea]

As described above, in the present invention, not only can insulation between the coil and the yoke and electrical insulation between the yoke and the contact terminal be obtained by the two insulating walls, but also these insulating walls are connected to the case. Because it is integrated into the insulator, it can be provided at a low cost without requiring an increase in parts or assembly man-hours, and there is no need to consider installing insulators later. Therefore, each part can be arranged neatly even in a small case.
Furthermore, because one insulating wall is located between the yoke and the movable contact drive part of the armature, separating the two, the armature may be subject to unnecessary magnetic influence from the yoke. The characteristics are also stable.

[Brief explanation of the drawing]

Fig. 1 is a cutaway perspective view of one embodiment of the present invention, Fig. 2 is a perspective view with the cover removed, Fig. 3 is an exploded perspective view of the same, Fig. 4 is an exploded perspective view of the coil block, and Fig. 5 6 is a sectional view of the same as above, and FIG. 7 is a sectional view of another embodiment, in which 1 is a case, 2 is a base, 3 is a cover, and 4 is a sectional view of another embodiment.
is a coil block, 5 is an armature, 9 is a coil, 1
2 is a yoke, and 13 is an insulating wall.

Claims (1)

[Scope of utility model registration request] The case consists of a base on which parts such as a coil, yoke, armature, and contact terminal are assembled, and a cover that is attached to the base and covers the parts. Two insulating walls are integrally provided on which the yoke is positioned, and one insulating wall is positioned between the yoke and the coil, and it is L-shaped and one piece is used as an attraction piece when the coil is excited. A contact switch in which the other insulating wall is located between the movable contact drive part of the other armature and the yoke.