DE7407510U - Relays, especially hinged armature relays - Google Patents

Description

PATENT Attorney DIPL.-ING.Ή ^:. '^ ÖNNgT /.' 5: 6 WUPPERTAL BARMEN DIpI.-Ing. Harald Ostriga

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Pirma Elchhoff-Werke GmbH., 588 Lüdenscheid, Buckesfelder Str. 101

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Relays, especially hinged armature relays.

The innovation relates to a relay, in particular on a clapper armature relay with magnetic self-holding, so-called latching relay, with a coil that is axially penetrated by a coil core, the end face a cooperating with an armature Kornpolfläche having.

The dropping of the armature can, for example, be caused by the excitation of a second, oppositely polarized discharge winding, which cancels the remanence.

In practice, it is known when building a Haftreläis of the type described for the Coil core to a magnetic material with high remanence use. This is for the reason that after the coil erasure has ended, there remains magnetism, which is the

Sticking of the armature to the coil core causes this sticking the armature on the coil core is characteristic of such latching relays, whereby it is important that the coil core is able to generate such a large holding force that the armature adheres to the core pole face of the coil core is effected. A properly designed core pole surface is an indispensable prerequisite for this.

In previously known coil cores, the core pole surface is designed as a flat surface which is at right angles to the The longitudinal axis of the coil core runs. There is inevitably a large area contact between the armature and the core pole surface which, however, can easily be disturbed if, for example, there are foreign bodies on the core pole face of any kind that can easily get there through contamination. The resulting Air gap has a disadvantageous effect on the adhesive force, so that even the slightest vibrations on the relay cause the anchor si ^. unintentionally detaches from the coil core. However, this is precisely the case with the use of such "sticky relays", which are used in various ways in apparatus and devices of any kind are used, highly disadvantageous.

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Based on the previous structure, in particular the core pole face of a coil core, the technical task of the present innovation is to provide a to design previously known stick relay for use so that its adhesive effect between the coil core and the Armature in any case remains unshakable, so that such a latching relay is more reliable in practice and can work more safely than before.

The goal of the innovation is achieved in an advantageous manner that the coil core is below the end of the stiin Formation of a core pole face with only a relatively small surface area is tapered.

The decisive difference between the subject of the innovation and a previously known stick relay is in this to see that the core pole surface now "only has a relatively small contact surface on which the armature to Plant "is brought. It has been shown that this results in the bundling of the magnetic lines of force a relatively small contact surface on the core pole surface is particularly intense and beneficial to the adhesive force affects.

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Because the contact area is now relatively small, this small contact area also only offers a relatively small space for the settling of foreign objects, such as impurities or the like. You get here a concentrated flux of lines of force from the coil core to the armature, so that an adhesive force is created that is so strong and it is sufficient that a reliable adhesion of the armature to the coil core is achieved.

In practice there are now a number of advantageous implementations for achieving a relatively small one Contact surface on the core pole surface possible. So could you can, for example, this core pole surface by chamfering the Form the end of the coil core. In this way, part of the cross-sectional thickness of the coil core is already taken removed, 'so that a cross-sectional area considered in the diameter plane, significantly below Contact surface is created in which the bundling of the magnetic lines of force already has a favorable effect.

The effect of a concentrated bundling can in'der "practice still be favored" if the core pole

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surface is designed essentially dome-shaped.

In this context, however, it would also deviate from this dome-shaped composite surface possible to give this a conical shape, so that you here a small contact surface between the coil core and the armature is achieved. The only important thing about these statements is the fact that a concentrated bundling of the magnetic lines of force in the contact area between the coil core and the armature occurs, which creates an increased adhesive force and thus makes the latching relay particularly safe.

In summary, the innovation has succeeded in creating a latching relay that has a special intensive holding force when the residual magnetism has an effect particularly distinguished in the coil core.

In addition, embodiments of the innovation are shown on the accompanying drawing; show:

I ¹ Xg. 1 an overall representation of a latching relay,

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partially shown in section, using a coil core whose core pole surface is chamfered,

2 shows a representation of a coil core on its own with a dome-shaped core pole surface,

3 shows a further individual representation of a coil core, wherein the core pole surface is designed to be tapered, and

4 shows an enlarged partial representation of a latching relay, wherein the armature rests on the coil core and furthermore the bundling of the magnetic lines of force through a dashed line is illustrated.

In the case of the latching relay shown in FIG. 1, 10 initially denotes a relay socket in which two contact springs 11 are also included. Furthermore is in this Eelais socket a coil core 12 is supported, the a coil 13 extends axially through it. On one, held in the embodiment between the coil core and the relay socket Yoke 14 is an armature 15 pivotally mounted, its contact end 15a in the direction of the contact springs 11

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is guided, while the retaining loop 15b protrudes over the plane Aes coil core 12 · In the case of the coil core 12 a bevel 16 is provided which forms a core pole face 17 with a relatively small surface area.

According to FIG. 2, the core pole face 17 is part of a spherical cap 18 which is formed on the end of the coil core 12 is.

Furthermore, a coil core 12 is shown in Fig. 3, the core pole face 17 of which is provided at the end tip of a pointed cone 19. In all the versions shown a bundling of the magnetic lines of force 20 is created, as this is demonstrated in the bar position according to FIG. 4.

It goes without saying that the illustrated and described embodiments are only possible Embodiments are to be seen. As part of the innovation, it would also be possible, for example, to have a core pole face to form with a relatively small contact area when you look at the end face of the previous Coil cores attaches or attaches or inserts an extension piece,

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which has a surface shape similar to that shown Has surface. The effect of concentrated bundling could also be achieved with such an attachment the magnetic lines of force in the contact area. The advantageous effect of a good adhesive effect can also be achieved with such a solution.

7407518 UM «

Claims (4)

Protection claims: 1. Relays, in particular hinged armature relays with magnetic seltost control, so-called latching relays, with a coil through which a coil core extends axially, the one on the stimend side cooperating with an armature Has core pole face, characterized that the coil core (12) end-to-end with the formation of a core pole surface (17) J & it only relatively small surface area is tapered. 2. Eelais according to claim 1, characterized in that the core pole face (17) is formed by chamfering the front end of the coil core (12). 3 _& Heiais according to Claim 1, characterized in that the core pole face (17) is designed essentially in the shape of a dome. 4. Relay according to claim 1, characterized that the core pole surface (17) is designed essentially acutely conical. f487118 lift «