JPS5854763Y2 - relay - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a relay that opens and closes contacts using an armature that is bent into an L-shape and rotates around the bent portion.

In this type of relay, the armature is usually rotatably supported at one end of the yoke so that a magnetic circuit is formed by the iron core, the yoke, and the armature.

At this time, stable operation cannot be achieved if the armature shifts in its width direction, that is, in the direction perpendicular to the rotating surface, so conventionally the width of the armature is made smaller than the width of the yoke. Projections were extended from both ends of the end face of the yoke, and the armature was placed between these projections to position the armature and prevent it from shifting.

However, this reduces the cross-sectional area of the armature and reduces the suction force, and it is not possible to use a thin type in which the armature is arranged so that it rotates along the upper surface of the base, as in the embodiment of the present application described later. , it is difficult to assemble the yoke and armature on the base.

For this purpose, the armature is positioned not by the yoke, but by engaging a presser spring that presses the armature and brings the rotation center of the armature into contact with the yoke. A method has been proposed in which the armature is positioned using a spring to solve the problems in the conventional example.

However, when this product is subjected to excessive vibration and impact, the proper connection between the armature and the presser spring may come loose, causing the armature to fall off and cause it to malfunction or become inoperable. there were.

The present invention was developed in view of these points, and its purpose is to position the armature by the engagement of the presser spring and the armature without reducing the cross-sectional area of the armature. In addition to increasing the suction force and making assembly easier, the receiver provided on the base and cover can maintain normal operation to prevent the armature from falling off even when subjected to excessive vibration shock. There is a relay to provide.

The present invention will be described in detail below based on illustrated embodiments.

In the figure, reference numeral 8 denotes a base which is a synthetic resin molded product, and walls 21 are erected on the four circumferences of the upper surface.A cover 9, which is also a synthetic resin molded product and has an open bottom, is placed over this wall 21 to cover the outer surface of the wall 21. The protrusion 22 provided and the engagement hole 2 provided at the bottom of the cover 9
3, both can be assembled by engaging them.

A pair of parallel insulating walls 26 and 27 are erected on the upper surface of the base 8, a yoke 1 is placed between the two line edge walls 26 and 27, a coil block is placed on one side of the insulating wall 26, and a coil block is placed on one side of the insulating wall 26. A contact block is arranged on one side of 27.

The coil block is composed of a coil frame 5 around which a coil 4 is wound around the outer periphery of a central body part 28, an iron core 3 disposed in a through hole 30 of a core of the coil frame 5, and coil terminals 20 at both ends of the coil frame 5. Terminal holding part 29.29 into which is inserted
are integrally molded.

The iron core 3 is integrated with the L-shaped yoke 1, and the iron core 3 and the yoke 1 are formed into a U-shape.

Both have rectangular cross-sectional shapes and the same size.

Both the end faces of the iron core 3 and the end faces of the yoke 1 are cut at right angles, so that both end faces are flush with each other.

Therefore, the iron core 3 and the yoke 1 are compatible, and the coil frame 5
At the time of installation, one of the pieces may be used as the iron core 3 and the other piece may be used as the yoke 1.

2 in the figure is an armature, which forms an abbreviated shape with a piece 2a that is attracted to the magnetic pole surface of the end face of the iron core 3, and a piece 2b that suppresses and drives a contact spring 6, which will be described later. A groove 11 is formed in the center of the outer surface of the part, and a piece 2a of the inner surface of the new curved part is formed.
A recess 10 is formed in the closer portion.

This armature 2 has one edge of the recess 10 supported by the edge of the yoke 1 so that it can swing freely, and contacts the groove 1 to urge the armature 2 toward the yoke 1. It is held by a presser spring 7.

This presser spring 7 is formed integrally with the other end of the contact spring 6, which has a pair of movable contacts 15, 15 at one end, and is attached to the common terminal 17.

The contact point between the presser spring 7 and the armature 2 in the concave groove 11 is located closer to the piece 2b that drives the contact spring 6 than the point where the armature 2 is supported by the yoke 1, and therefore the presser spring 7 is simply the armature. 2 toward the yoke 1 to hold the armature 2, but also functions as a return spring for the armature 2.

A common terminal 17 to which a contact spring 6 and a presser spring 7 are attached, and a normally closed terminal 18 and a normally open terminal 19 to which fixed contacts 16 and 16 are attached, respectively, are inserted into an insertion hole 24 provided in the base 8. It is attached to the base 8 by inserting the pin portion.

The coil frame 5 is also attached to the base 8 by inserting the coil terminals 20 into the insertion holes 25 provided at the corners of the base 8.

If the coil 4 is energized and the iron core 3 is excited, the armature 2
The piece 2a is attracted to the iron core 3 and swings around the point of contact with the yoke 1, and the piece 2b presses the contact spring 6 to switch the contact.

The armature 2 is positioned by the groove 11 and the presser spring 7 described above.

That is, the width of the groove 11 and the width of the presser spring 7 are formed to be the same, so that the side edge of the presser spring 7 comes into contact with the edge of the groove 11 to prevent the armature 2 from shifting. It is.

The base 8 and the cover 9 each face the side surface of the bent portion of the armature 2 at a small distance, and also face the outer surface of a portion of the bent portion of the armature 2 near the piece 2b at a small distance. Receptacles 13.14 are provided, and when the armature 2 receives an excessive vibration impact that causes the concave groove 11 of the armature 2 to disengage from the presser spring 7, the receptacles 13.14 The movement is restricted to maintain the engagement between the concave groove 11 of the armature 2 and the presser spring 7.

As described above, in the present invention, the width of the armature can be made the same as the width of the yoke in order to position the armature by holding the presser spring and the armature together, thereby reducing the suction force. Compared to the conventional example, which requires the use of an armature with a width smaller than the yoke, it is possible to increase the suction force and make assembly easier. Since the armature is equipped with a receiver that faces the side end surface of the armature at a small distance, it is subject to excessive vibration and shock even though the armature is positioned using a presser spring. This prevents the armature from falling off during the process, and maintains normal operation.

[Brief explanation of drawings]

Fig. 1 is a perspective view of the present invention - an embodiment, Fig. 2 is a perspective view with the cover removed, Fig. 3 is an exploded perspective view, Fig. 4 is a perspective view of the cover, and Fig. 5 is a perspective view of the base. Enlarged perspective view of section 6
The figure is a sectional view of the base and cover. 1 is the yoke, 2 is the armature, 7 is the presser spring, 8 is the base,
9 is a cover, 11 is a groove, and 13.14 is a receiver.

Claims (2)

[Scope of utility model registration request] (1) Equipped with a new L-shaped armature, the bent part of this armature is rotatably held at one end of the yoke, and is contacted by the armature that is attracted and rotated by the excitation of the coil. In a relay that opens and closes a contact by driving a spring, a presser spring is engaged with a groove formed on the outer surface of the bent portion of the armature, and the presser spring presses the inner surface of the bent portion of the armature against one end of the yoke, A relay in which a base and a cover that form a space in which these components are housed are provided with receivers that face opposite end surfaces of the bent portion of the armature at a small distance. (2) The relay according to claim 1 of the utility model registration claim, wherein the receiver provided on the base and the cover is provided with a relative portion that faces the outer surface of the bent portion of the armature at a small distance.