Electricity: magnetically operated switches – magnets – and electr – Electromagnetically actuated switches – Polarity-responsive
Patent
1992-10-09
1994-02-22
Donovan, Lincoln
Electricity: magnetically operated switches, magnets, and electr
Electromagnetically actuated switches
Polarity-responsive
335128, H01H 5122
Patent
active
052891453
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to an electromagnetic relay having the following features: an open bottom, which can be closed by a bottom part. elements which are guided out of the housing, and a magnet system whose coil is located adjacent to the closed top of the cap, and elements, which are anchored in a coil former and, for their part, are electrically conductively connected to coil connecting elements which are guided out through the bottom.
2. Description of the Related Art
A relay having the above-described construction is disclosed, for example, by German published application 38 35 105. A narrow construction is achieved by the disclosed arrangement of the coil above the contact system in the closed upper region of the housing. As a result of the arrangement of the contact elements in the vicinity of the connection side in the lower part of the housing, short electrical connections are also ensured between the contacts and the associated connecting pins, which not only permits a saving in material and manufacturing steps, but also provides advantages with respect to heat dissipation and the insulation between the contact elements and the magnet system. This structural shape is therefore preferably used for heavy-current and mains relays.
As a result of the arrangement of the coil in the upper region of the housing, it is, however, necessary to guide the coil connecting elements via a relatively long path up to the connection side of the relay, it being necessary, however, to ensure the insulation to the PG,4 ferromagnetic circuit parts of the magnet system and to the contact elements. Especially when the relay is used at relatively high voltages, this insulation requires a notinconsiderable space in the housing, either in the form of corresponding projections of the coil former or in the form of additional insulating parts.
SUMMARY OF THE INVENTION
The object of the invention is to specify a relay of the type mentioned initially and a production method for this relay, in which a simple and space-saving connection of the winding ends of the coil to the connection side of the relay is made possible while retaining the basic construction. In particular, it is intended in this case to ensure the insulation between the coil connecting elements and the magnetic circuit, as well as the contact elements, without any additional space requirements.
In order to achieve this object, a relay according to the invention has the following additional features: in a side wall of the cap, from the bottom as far as the region of the top of the cap, and open in a depression of the cap top, which is open outwards, connected to the coil, are guided in insertion openings with respect to the cap top and likewise open in each case in one of the depressions, and conductively connected to the end of a coil connecting element.
In the relay according to the invention, the coil connecting elements are thus guided in an insulated manner directly in the wall of the cap, preferably by being embedded in the side wall. In consequence, within the housing space, there is no need for space for these coil connecting elements themselves nor for additional insulating walls. The space requirement is thus determined just by the extent of the magnet system and of the contact system.
The conductive connection between the ends of the respective supporting element and of the associated coil connecting element can basically be produced in different ways using standard methods. Welded connections or soldered connections come into consideration in this case, if the structure can be designed such that the ends to be connected are accessible for welding electrodes or for soldering devices, and, if necessary, the resistance to the soldering temperature is ensured in the vicinity of the soldering point. However, a connection by means of a conductive adhesive is particularly advantageous, which can be incorporated into the respective depression and sets at a relatively low temperature. In order to ensure
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Donovan Lincoln
Siemens Aktiengesellschaft
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