Electricity: magnetically operated switches – magnets – and electr – Electromagnetically actuated switches – Polarity-responsive
Patent
1992-03-18
1993-08-10
Donovan, Lincoln
Electricity: magnetically operated switches, magnets, and electr
Electromagnetically actuated switches
Polarity-responsive
335 83, 335128, H01H 5122
Patent
active
052353010
DESCRIPTION:
BRIEF SUMMARY
The invention relates to an electromagnetic relay having the following features: insulating material and also further magnetic circuit parts; coil axis being parallel to the basal plane of the base; the base in insert slots perpendicular to the basal plane.
DESCRIPTION OF THE RELATED ART
Relays of this type are known in many forms, for example from European Published Application 0 281 950. In general, with such relays there is the problem that the coil and the base, including the function parts of the relay fastened on them, must be optimally joined to one another in as simple a manner as possible. Depending on the design, contact elements can thereby be fastened in the base or in the coil body by means of insertion, which also readily allows an automated assembly. The abovementioned publication already also states one possibility for forming an additional supporting arm onto a contact element for fastening the coil body on the base. Otherwise the connection of coil and base is essentially secured there by welded-on winding connections and finally by a housing cap.
With relays of this type there is a problem for the coil connections insofar as it is necessary to wind the coil itself in advance, during which the winding ends are usually fastened and soldered to winding support points. These winding support points in the form of pieces of wire or sheet-metal parts must therefore first be anchored in the coil body flanges, and in the case of the abovementioned relay they must be joined to the associated connection elements in the base by welding or soldering once the coil has been placed on the base. This thus entails an additional outlay with respect to component parts and assembly operations, as well as a plurality of connection points in series in the circuit.
Relays are admittedly also known in which winding support points anchored in the coil flanges are provided at the same time with formed-on connection elements which, if necessary, can also be inserted through cutouts in a base.
However, in this case there are also problems whenever, for reasons of space or for maintaining a particular connection grid, the wind-on pieces and/or the connection elements themselves project into the winding region, that is to say into the region through which the coil wire or a winding finger passes during winding of the coil. In such cases it is known to move wind-on pieces and/or connection elements into a position outside the winding region for the winding operation and only to bend them into their final position in the winding region after the winding (as shown in European Published Application 0 082 238). However, this requires costly bending devices. In particular, such a measure cannot be used for connection elements having a large cross-section, such as with flat connectors.
SUMMARY OF THE INVENTION
The object of the invention is to improve the connection of a coil body and a base in a relay of the type mentioned at the beginning, with as few component parts as possible permitting an automated assembly. The connection elements are thereby designed in such a way that it is also possible to wind on the winding ends simply and without additional wind-on elements, with there being as few connection points as possible in the electrical circuit of the coil. In addition, a method for manufacturing such a relay is disclosed.
This object is achieved according to the invention in a relay of the type mentioned at the beginning having the following additional features: parallel to the coil axis for a fastening leg which is formed integrally onto a coil connection element; and the fastening leg in each case.
In the relay according to the invention, therefore, the coil connection elements have in each case hook-shaped fastening legs that are formed on parallel to the coil axis and hence to the basal plane, and which engage in corresponding insert channels on at least one coil flange, but expediently on both coil flanges. As a result of the anchoring of the coil connection elements in the base, the coil body is consequentl
REFERENCES:
patent: 4837538 (1988-09-01), Dittmann
Dittmann Michael
Hendel Horst
Donovan Lincoln
Siemens Aktiengesellschaft
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