EP3032005A1 - Magnet assembly - Google Patents

Abstract

The invention relates to a magnet arrangement for interacting with a mechanical and / or electromechanical sensor which changes its state in a defined manner when approaching a magnet (1, 2). In order to optimize the response, it is provided that the magnet (1, 2) has at least one pole pair (3, 4 or 5, 6) of a permanent magnet lying next to one another and pointing in the direction of the sensor.

Description

The invention relates to a magnet arrangement according to the preamble of claim 1.

Magnetic arrangements of this type are already known.

It is already known to provide automatic locks with triggers that have magnetized locking or active elements. This sees the EP 2096241 A2 before that a locking element is automatically transferred in the closing position reaching door leaf in the "locking position". This locking unit is characterized in that the lock chain is held by a blocking element in the "unlocking" and that in or on one of the locking unit associated door frame-side locking bar a release magnet is arranged, which works for automatic locking on the blocking element that this releases the lock chain so that the locking element is automatically transferred to the locking position.

In the EP 2314810 A2 in which, in contrast to the aforementioned application, a sensing arm is provided which carries a permanent magnet and the cuff side, a ferromagnetic locking pin is assigned, which occupies its release position in front of the sensing arm, in which the drive rod is released. In contrast to the first-mentioned document, an accurate operating point is achieved.

The EP 0599809 A2 and the EP 0537805 A2 provide an arrangement of a magnet and a magnetic field sensor with which the switching position of the espagnolette fitting can be detected. In the same direction also points the DE 29519486 U1 and the DE 19518527 A1 ,

A disadvantage of the aforementioned prior art is that the permanent magnets have a certain spread, which causes the sensors are prematurely triggered when the sensors and the permanent magnets are not yet aligned as desired to each other. If the permanent magnets are dimensioned smaller, they do not achieve the desired effect on the sensor.

From the DE 4329960 A1 An arrangement for generating a defined variable magnetic field has become known. In this case, a plurality of permanent magnets are each mounted individually rotatable about its central axis. The rotation of the magnets takes place in such a way that adjacent permanent magnets can be rotated in the opposite direction to the change in the strength of the multipole field or in the opposite direction to the change in the multipole field. This is essentially caused by rotational coupling of the permanent magnets by means of gears.

From the DE 29914387 U1 For example, an apparatus for bundling field lines of a primary magnetic field to a secondary magnetic field of higher field line density is known. This is achieved by a fringe made of wire-shaped ferromagnetic material and rotating within the primary magnetic field.

Although the latter solutions allow adjustments to the desired magnetic field strengths and densities, but require considerable component complexity and rotating components ahead.

The invention accordingly seeks to provide a simple and cost effective way to improve the interaction with a mechanical and / or electromechanical sensor and to achieve an improved response of the sensor when approaching the magnet assembly.

To solve the invention provides that the magnet assembly has at least one adjacent and pointing in the direction of the sensor pole pair of a permanent magnet. The arrangement of a pair of adjacent poles leads to the fact that the magnetic field lines emanate much more focused from the pole.

A further development provides that the sensor is a mechanical trigger, which in turn has a second magnet arrangement with a pole pair pointing in the direction of the first magnet arrangement. By this measure, an actuation of the trigger will only take place when the desired according to the application pole pairs are exactly opposite.

It may also be advantageous that the mechanical release is the blocking element of a locking device, which is under the influence of an energy storage device, which is effective in the direction of a locking position.

The air gap between the magnets can be reduced if the first magnet arrangement is attached to a feeler arm, which is movably arranged in the direction of the second magnet arrangement.

The use is also advantageous if the sensor is a reed contact.

Fig. 1

eine schematische Darstellung der Magnetanordnung

Further advantageous embodiments will be apparent from the drawings. It shows:

Fig. 1

a schematic representation of the magnet assembly

That in the Fig. 1 illustrated embodiment illustrates the invention with reference to two mutually influencing magnets 1, 2. Each of the magnets 1, 2 is equipped as a bi-polar magnet with two adjacent poles 3, 4 and 5, 6. If only one pole pointing in the direction of the corresponding magnet is provided in the known state of the art, the first magnet 1 is arranged such that a north pole 3 and a south pole 4 point in the direction of the moving magnet 2. This forms a sensor is equipped with two poles and also its poles 5, 6 point in the direction of the associated first magnet 1. The poles 5, 6, however, are arranged mirror-symmetrically to the poles 3, 4 of the first magnet 1. If the magnets 1, 2 are directly opposite each other, the poles 3 and 5 and the poles 4 and 6 attract each. On the other hand, in the case of a deviating alignment position during a movement along the direction of movement 7, the same and repulsive poles 4 and 5 or 3 and 6 lie opposite one another, which does not cause reciprocal attraction.

In this case, the second magnet 2 forms in the magnet arrangement the sensor, which is opposite at least one adjacent pole pair 3, 4 of the first magnet 1 and pointing in the direction of the sensor.

The second magnet 2 may be a mechanical trigger or attached thereto. The second magnet 2 is intended to have a pole pair pointing in the direction of the first magnet arrangement. Since the mechanical release as a blocking element of a locking device, must overcome at least certain frictional forces and possibly also under the influence of an energy storage device, which is effective in the direction of a locking position, the increased forces by the arrangement are advantageous. In order to ensure the spatial proximity of the first and second magnets 1, 2, the first or second magnet 1, 2 on a sensing arm according to the EP 2314810 A2 to be appropriate. In this regard, the full content of the EP 2314810 A2 Referenced.

Nevertheless, by focusing the magnetic field of the first or second magnet in the arrangement, a reed contact which cooperates with one of the mentioned magnets 1, 2 is also advantageous.

LIST OF REFERENCE NUMBERS

1

magnet

2

magnet

3

pole

4

pole

5

pole

6

pole

7

movement direction

Claims (5)

Magnetic arrangement for interacting with a mechanical and / or electromechanical sensor which changes its state in a defined manner when approaching a magnet (1, 2),
characterized,
that the magnet (1, 2) has at least one lying next to one another and pointing in the direction of the sensor pair of poles (3, 4, or 5, 6) of a permanent magnet. Magnet arrangement according to claim 1,
characterized,
that the sensor is a mechanical shutter or part thereof is, in turn, a second magnet (2) with a in the direction of the first magnet (1) facing the pole pair (5, 6) has. Magnet arrangement according to claim 2,
characterized,
that the mechanical release is the locking element of a locking device, which is under the influence of an energy storage device, which is effective in the direction of a locking position. Magnet arrangement according to claim 2 and 3,
characterized,
that the first magnet (1) is mounted on a movable sensor arm. Magnet arrangement according to claim 1,
characterized,
that the sensor is a reed contact.

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