Electricity: magnetically operated switches – magnets – and electr – Electromagnetically actuated switches – Polarity-responsive
Patent
1995-09-25
1997-04-01
Donovan, Lincoln
Electricity: magnetically operated switches, magnets, and electr
Electromagnetically actuated switches
Polarity-responsive
H01H 5122
Patent
active
056170661
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a polarized electromagnetic relay having with its bottom side and in which are secured at least two stationary mating contact elements as well as two bearing supports for the armature, basic plane, a core and two pole shoes connected to the ends of the core, center, a center pole having a first pole direction and which produces poles at each of the pole shoes, the poles having a pole direction opposite to the first pole direction, coil axis and is pivotably mounted in the center thereof about a center axis which is parallel to the basic plane, and at least two movable contact elements, which are embedded in an insulating material carrier and optionally cooperate with one of the mating contact elements, and have two bearing elements which are embedded in the insulating material carrier, issue at opposite sides of the armature and are connected to the bearing supports.
The invention additionally relates to a method for producing a relay of this type.
2. Description of the Related Art
A relay of the above-described type is disclosed, for example, in European Patent Document EP 0 423 834 A2. In the case of this relay as well as in the case of other miniature relays having a fundamentally similar structure, the various assemblies, that is to say the base with the stationary contact elements, the armature with the movable contact elements, and the coil assembly are arranged one above the other in a layer design, resulting in an accumulation of the manufacturing tolerances of the individual parts. Therefore, in the case of the known relay in accordance with European Patent Document EP 0 423 834 A2, the armature is secured by means of bearing elements which are secured, in the form of torsion webs and securing arms lying parallel to the base plane, so as to rest on supporting surfaces which likewise lie parallel to the basic plane.
SUMMARY OF THE INVENTION
The separations between the stationary contact elements and the movable contact elements connected to the armature are thus fixedly predetermined by the manufacture of the individual parts. This means that, on the one hand, the individual parts have to be produced in a manner involving very few tolerances, which is costly, but that in spite of this the tolerances which are present accumulate during assembly. Subsequent adjustment of the contact separations is thus essential and is also provided in the case of the known relay by bending on the securing tabs.
The aim of the present invention is to configure a relay of the type mentioned in the introduction in terms of its structure, and to specify a production or assembly method therefor, in such a way that the tolerances of the individual parts no longer have any influence on the contact separations. Therefore, the intention is to enable the movable and the stationary contact elements of the relay to be assembled in the correct position with respect to one another, irrespective of the accuracy of the individual parts, so that subsequent adjustment is no longer necessary.
This aim is achieved according to the invention in the case of a relay of the type mentioned in the introduction as a result of the fact that the bearing elements are designed as flat bearing strips which extend at least with a securing section at right angles to the base plane and are secured in a manner such that they rest flat against the bearing supports which are likewise arranged at right angles to the base plane.
In the case of the relay structure according to the invention, therefore, a departure is made from the previous layer design, and the connection between the movable parts and the stationary base is effected in connection planes which extend at right angles to the base plane and hence in the direction of the switching movement. Consequently, it is possible, during the assembly of the armature, for the contact separation to be set exactly and in a continuously variable manner and to be fixed by the securing of the bearing elements. As a result
REFERENCES:
patent: 3247344 (1966-04-01), Rossell
patent: 4695813 (1987-09-01), Nobutoki et al.
patent: 5117209 (1992-05-01), Sato
patent: 5337029 (1994-08-01), Nobutoki et al.
Dittmann Michael
Mitschik Herbert
Stadler Heinz
Donovan Lincoln
Siemens Aktiengesellschaft
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