Electricity: magnetically operated switches – magnets – and electr – Electromagnetically actuated switches – Polarity-responsive
Reexamination Certificate
1999-10-18
2001-05-15
Barrera, Raymond (Department: 2832)
Electricity: magnetically operated switches, magnets, and electr
Electromagnetically actuated switches
Polarity-responsive
C335S078000, C335S085000, C335S128000
Reexamination Certificate
active
06232858
ABSTRACT:
FIELD OF THE INVENTION
The invention is directed to an electromagnetic relay having the following features:
a coil with coil body and winding,
a L-shaped core whose longitudinal leg extends through an axial recess of the coil body and whose transverse leg lies perpendicular thereto at a first end face of the coil,
a L-shaped armature that has one end seated at a first end of the core and has its other end forming a working air gap relative to the second end of the core such that core and armature approximately form a rectangle given closed working air gap, whereby a magnet system is formed by coil, core and armature,
a base body of insulating material that is connected to the magnet system at that side of the coil lying opposite the armature and in which at least one stationary contact element and at least one contact spring has movable contact element cooperating therewith are contained, whereby the contact elements are respectively connected to terminal elements, and
a slide that transfers the armature motion onto the at least one contact spring.
BACKGROUND OF THE INVENTION
DE 1 764 256 A1 discloses a relay of the species initially cited. This relay, however, differs from the species initially cited on the basis of the arrangement of the base body as well as of the contact and terminal elements. The arrangement therein makes a modular relay structure more difficult, clear production-oriented disadvantages deriving therefrom. Further, the base body of the relay accepting the contact elements does not exhibit any specific features for insulating the individual contact elements from one another, this being unbeneficial, particularly for multi-pole embodiments of the relay.
A goal of the invention is comprised in realizing structural preventive measures, particularly for multi-pole relays, that simplify an automated production sequence and enable a low-tolerance mounting of the magnet system at the base body as well as a precise guidance of the slide. The restoring spring and the armature as well as an improved suspension of the actuation mechanism. Particular attention is thereby paid to the modular structure of the relay. Over and above this, a compact structure is desired for multi-pole embodiments of the relay.
SUMMARY OF THE INVENTION
This goal is inventively achieved in that the base body, as an essentially flat base, is arranged parallel to the coil axis under the coil, in that the at least one contact spring extends between the coil and the base parallel to the coil axis, whereas the terminal elements are conducted toward the outside perpendicularly thereto through the base, in that the armature has its transverse leg seated at the free end of the longitudinal leg at the core, in that the longitudinal leg of the armature extends above the coil, in that the transverse leg of the core comprises a pole surface toward the top for forming the working air gap, and in that the magnet system has lateral fastening continuations in the region of the transverse core leg, said continuations engaging with upwardly applied projections of the base.
In an advantageous embodiment, the end sections of longitudinal armature leg and transverse core leg forming the working air gap are broadened T-shaped, as a result whereof the magnetic resistance in the region of the working air gap is reduced.
For designing the fastening continuations, there is the possibility, on the one hand, that the fastening continuations of the magnet system are applied to outside edges of a coil flange. Expediently, the coil flange that lies closest to the working air gap should be selected. This embodiment proves advantageous for tool-oriented reasons, since the fastening continuations can be manufactured with the required precision in a simple way.
Alternatively, there is the possibility of fashioning the fastening continuations directed downward laterally at the transverse leg of the core. In an advantageous embodiment, the fastening continuations are applied downward to the core at both sides thereof proceeding from the broadened end section thereof. Over and above this, the fastening continuations are fashioned hook-shaped in both alternatives, for example, as snap-in noses so that these can be latched to recesses applied to the continuations of the base, as a result whereof magnet system and base are connected to one another in a type of press seat. On the one hand, this leads to a stiffening of the overall system; on the other hand, no additional outlay is necessary for fastening the magnet system to the base.
Further, fastening chambers for flange continuations of the coil body are applied in the base, these comprising plug-channels for fastening winding terminal elements, so that the flange continuations are secured in the fastening chambers in the region of the armature bearing by being plugged in. Over and above this, a seating pin is fashioned at the base, this being provided with a catch nose. This catch nose is hooked to a transverse web that is applied between the bottle continuations at the coil body, so that an additional fastening of base and magnet system is realized.
The advantage of said features is comprised therein that the distance of the contacts from the working air gap is set low-tolerance in that the core or, respectively, the coil body is directly connected to the base as contact carrier. In this way, a summing-up of tolerances is avoided. The extremely low-tolerance arrangement of magnet system and base relative to one another achieves not only a precise guidance of the slide but also enables a precise definition of the excess stroke for the contact elements.
Advantageously, the actuation of the contact springs ensues via an essentially U-shaped slide coupled to the armature that has one of its lateral arms embracing the magnet system and whose middle section acts on the contact springs. Further, downwardly directed actuation elements are applied to the lower edge of the middle section. The plurality of actuation elements corresponds to the plurality of sets of contacts contained in the relay, composed of a contact spring and at least one cooperating contact element. The actuation elements can be applied in a simple way to the actuation element, which is preferably fabricated as a plastic formed part, without noteworthy added outlay. The actuation elements at the base project into contact chambers in which the sets of contacts are arranged. The individual sets of contacts are insulated from one another by the sidewalls of the contact chambers. Moreover, adequately high sidewalls of the contact chambers for the insulation of the sets of contacts can be realized in this way given a compact structure of the relay. Effective precautions for insulating the individual sets of contact in a simple way are thus integrated into the relay. Moreover, a further possibility of defining the access stroke derives due to the selection of the height of the actuation elements.
Recesses for the middle section of the slide provided in the sidewalls of the contact chambers improve the guidance thereof further. For guiding the slide, a respective pair of upwardly divided guide rails is attached to the base at both sides, this embracing an outwardly projecting guide peg applied to the outside edge of a lateral slide arm and securing this against lateral dislocation in the up and down motion of the slide.
In an advantageous embodiment of the initially cited relay, a U-shaped armature spring is provided that has a first arm secured to the longitudinal armature leg, that is arranged approximately parallel to the transverse armature leg in its middle section and that has the second arm secured parallel to the longitudinal core leg in a recess between core and coil body. The recess between core and coil body is supplied best in the form of an offset free space at the coil body. Further, the second arm of the armature spring, which is plugged into the recess between coil body and core, is preferably equipped with a catch nose that is hooked into a coining directly above in the core. As a result thereof, an unintent
Barrera Raymond
EH-Schrack Components Aktiengesellschaft
Schiff & Hardin & Waite
LandOfFree
Electromagnetic relay does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Electromagnetic relay, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electromagnetic relay will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2510163