DE2905498A1 - MINIATURE RELAY ARRANGED IN A HOUSING - Google Patents

Description

W. Minks 21

Miniature relay arranged in a housing

Addendum to Patent No. 2,516,502.

The invention relates to a miniature relay arranged in a housing with an angular Hinged armature, which is tiltable with its inside on the yoke of the magnet system, so that in a Position of one leg of the hinged armature to the core and in the other position of the other leg of the The hinged armature is approximated to the yoke except for an air gap and on the side of the hinged armature facing away from the yoke, a contact system is arranged, which is of a Leg of the hinged armature can be actuated, according to patent 2,516,502.

The relay according to the main patent is very simple and easy to manufacture because the parts the magnet system in the housing only through to this molded shoulders are held so that when assembling the housing, the magnet system including of the angular hinged anchor is automatically brought into the correct position. In the relay according to the main patent, the contact system of the magnet system is complete independent, so that both systems according to training and

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Material can be optimally designed for their specific application without a compromise between the contact function and the magnetic function must be chosen.

The object of the present invention is to modify such a miniature relay in a simple manner so that it has bistable properties.

This is done in a manner known per se by inserting a permanent magnet into the magnetic circuit of the Magnet system.

The use of permanent magnets in the magnetic circuit of a relay to achieve bistable properties is known per se. So it is known from DE-PS 1 909 940, between the pole pieces of a relay a ceramic to arrange mik magnets. In this known embodiment, however, it is a type of construction which the contact system is arranged within the coil of the relay and the pole pieces simultaneously form the electrical contacts of the contact system. It must So here is a compromise between the magnetic properties and the contact properties of the pole pieces being found.

As set out above, are in accordance with the miniature relay the main patent contact system and magnet system independent of each other. As a moving part of the magnet system a hinged anchor is used, which corresponds to the

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required magnetic flux can be made sufficiently thick. In the known relay after the In DE-PS 1 909 940 the armature is formed by a flexible contact tongue which is made relatively thin because of its ease of operation must, whereby the magnetic flux is limited by the contact tongue.

In the miniature relay according to the invention, the magnetic flux that is produced by the permanent magnet is divided will call in two paths, and that it runs once over the yoke and the core back to the permanent magnet and on the other hand over the end of the yoke, the one Leg of the hinged armature and the end of the core back to the permanent magnet. This second path gives the Holding force that the permanent magnet exerts on the hinged armature to hold it in a certain position. In As a rule, the first-mentioned path via the yoke and core has the lower magnetic reluctance, so that A larger magnetic flux flows over this path. this may have the consequence that the on the hinged armature the holding force exerted is not sufficiently great.

According to the further development of the invention, the two magnetic fluxes are influenced so that a sufficient one Holding force for the hinged anchor is given. This can be done once in that in the first magnetic path a bottleneck for the magnetic flux is built in. This can be done in a simple manner that the yoke

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has an incision or breakthrough, so that the iron cross-section is reduced at this point and thus there is an increased magnetic resistance. A lateral incision in the yoke has the advantage that it is very easy to manufacture, while a breakthrough has the advantage that the magnetic flux flowing in the yoke can be divided symmetrically. In order to control the magnetic flux in the second magnetic circuit, namely in the circuit which comprises the hinged anchor, to improve, according to the further embodiment of the invention, the transition point at which the one leg of the hinged anchor rests against the core or its pole piece, provided with an enlarged cross-section, i.e. the magnetic resistance is reduced at this point.

By these measures it can easily be achieved that the determining the holding force of the hinged armature Magnetic flux becomes sufficiently large.

The invention and its advantageous developments are to be described in more detail with reference to the figures.

Figure 1 shows a section through a miniature relay according to the invention, while

Figure 2 shows a top view of the yoke of the Figure 1 relay.

Figure 3 shows a section through another Ausihrungsform the relay according to the invention and

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FIG. 4 shows a plan view of the yoke in the embodiment according to FIG.

The magnet system of the relay, as shown in section in FIG. 1, is arranged in a housing 10 into which the contact pins 20 are molded. The magnet system itself consists of the core 11 and the yoke 12, the coil 14 being arranged on the core 11. On the edge of the leg of the yoke 12 arranged above the coil is the angular one Folding anchor 13 mounted tiltable. With the leg 13a of the hinged armature 13, the contact spring 19 is actuated, which cooperates with the fixed contact 22. The contact arrangement is only shown schematically and can also consist of a larger number of contacts.

The parts of the magnet system are held in the housing 10 by the shoulders 15 and 17, the shoulder part 16 holding the hinged armature 13 in its position while the shoulder part 18 secures the yoke 12 with the core 11 and the coil 14 in place.

To achieve bistable properties is in the magnetic circuit between the yoke 12 and the core 11 of Permanent magnet 21 arranged, which is polarized in the longitudinal direction. In the embodiment of Figure 1 is the permanent magnet 21 on the ver beyond the coil arranged elongated core 11 and is on the other hand on the underside of the yoke 12.

A current flowing through the coil 14 generates a magnetic field which is superimposed on the magnetic flux of the permanent magnet 21. This causes the

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angular hinged anchor 13 in the other: position tilts over. In both positions the hinged anchor 13 held by the permanent magnet 21 in that either the leg 13a rests on the yoke 12 5 or the leg 13b at the end of the core 11.

For a better distribution of the magnetic flux between A breakthrough 26 is provided in the yoke 12 for the two magnetic circuits, as can be seen in particular from FIG can be seen. Through the opening 26, the iron cross-section of the yoke 12 is reduced at this point and thereby the magnetic resistance increases. This ensures that a larger part of the magnetic flux of the permanent magnet to hold the hinged armature is available.

To further improve the magnetic flux over the The cross-section of the core is widened at its end, for example by inserting a hinged anchor Pole shoe 25. This increases the magnetic resistance between the core 11 and the leg 13b of the hinged armature reduced, so that a better magnetic flux is achieved in this circuit as well.

As can be seen from Figure 2, the permanent magnet is located 21 across its entire width to yoke 12. Instead of the opening 26, a lateral incision can also be made in the Yoke 12 are attached, which on the one hand can be produced more easily than the opening 26, on the other hand but causes an asymmetrical magnetic flux across the cross section of the yoke.

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In the embodiment according to Figure 3, the permanent magnet is arranged with one pole on a pole piece 24, which connects to the core 11. This pole piece is L-shaped so that a permanent magnet 21 with larger dimensions can be used. If, on the other hand, you have a pole piece 24 of U-shaped cross-section is used, a better transition of the magnetic flux to the leg 13b of the hinged armature 13, in in a manner similar to that achieved by the pole piece 25 according to FIG.

In the embodiment according to FIG. 3, the yoke 12 also has a cutout 23 into which the permanent magnet 21 with a pole protruding. This results in a particularly good transition of the magnetic flux from the permanent magnet 21 to the yoke 12 and a further enlargement of the permanent magnet 21. The yoke section 23 can simultaneously can be used to reduce the magnetic flux in yoke 12 by making it larger than that protruding permanent magnet 21 and the permanent magnet in the cutout 23 is arranged eccentrically, as this from Figure 4 can be seen.

To achieve defined reset properties can the angular hinged armature 13 are also under the action of a weak spring, which for example can be realized by a foil connected to one leg of the hinged armature.

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Claims (11)

Standard Elektrik Lorenz AG onnc / no Stuttgart ^ d U b 4 ΰ W. Minks 21 Expectations ι lj) In a housing arranged miniature relay with an angular hinged armature, which is tiltable with its inside on the yoke of the magnet system, so that in one position of the one leg of the iClap armature to the core and in the other position the other leg of the hinged armature to the yoke is approximated to an air gap and on the side of the hinged armature facing away from the yoke a contact system is arranged, which can be actuated by one leg of the hinged armature according to patent 2 516 502, because it is known that the magnetic circuit of the core (11) and the yoke (12) is closed by a permanent magnet (21) arranged between them within the angle of the hinged armature (13). 2.) Miniature relay according to claim 1, characterized in that the yoke (12) has a constriction (23, 26) for the magnetic flux. 3.) Miniature relay according to claim 2, characterized in that the yoke (12) has an incision or has a breakthrough (23, 26). Fri / rk - 02/13/1979. /. D 3 0 MU / ORIGINAL W. Minks 21 4.) Miniature relay according to claim 3, characterized in that that the permanent magnet (21) protrudes with one pole into the opening (23) of the hole (12). 5.) Miniature relay according to claim 4, characterized in »that the permanent magnet (21) is eccentric is arranged for the breakthrough (23) of the yoke (12). 6.) Miniature relay according to claim 1 to 5, characterized in that the permanent magnet (21) with a Pole rests against the elongated core (11). 7.) Miniature relay according to claim 1 to 5, characterized in that the permanent magnet with one pole rests against a pole piece (24) attached to the core (11). 8.) Miniature relay according to claim 7, characterized in that the pole piece (24) is L-shaped is. 9.) Miniature relay according to claim 7, characterized in that the pole piece (24) is U-shaped is. 10.) Miniature relay according to claim 1 to 9, characterized in that that the magnetically effective cross-section at the surface between the core (11) and the adjacent leg (13b) of the hinged armature (13) is enlarged. 030034 / 02fc - W. Minks 21 11.) Miniature relay according to claim 10, characterized in that the extended end of the core (11) a pole piece (25) with a larger diameter than that of the core (11) is attached. Fri / rk - 02/13/1979. /. 0.3003A / 0::